Dynamic Data Binding at runtime

For future applications, flexibility will be an important feature. One of the biggest drawbacks of forms is/was, on my opinion, not being able to create new items at runtime.
JClient will easily overcome this restriction. But how about data binding ?
Imagine the following situation: We've got a VO "order" with the "custname" incorporated as lookup data. At runtime, the user decides that she needs to see the "custloc" as well (put an additional JTextField into some whitespace on his panel). As I understand it is possible to build a view link to tie an instance of the VO "customer" to the "order" (I'd prefer that over adapting the query statement of "order" at runtime). But how can I create the new iterator binding and control binding needed to populate the dynamically created attributes with the data from "customer"? And, further on, how will I be able to make the changed configuration of my panel persistent, let's say into the DB ? Or does the data binding concept of 10g just not cover this requirement?

Hi pascal
It is not possible to send you email at your address. All come back with a permanent error
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Similar Messages

MVC - Performance of data binding

Hi Gurus out there
I have a concern regarding performance of (dynamic) data binding if I have a lot of <i>textEdit</i> fields containing huge amount of data on a view page.
<u>Scenario</u>:
The view page contains buttons <b>[Add textEdit field]</b> and<b> [Save all entries]</b>. If you click the button <b>[Add textEdit field]</b> then a (new) <i>textEdit</i> will be generated and the model remembers the total number of <i>textEdit</i> fields that have been generated.
DATA: textedit_count TYPE i,
      o_textedit     TYPE REF TO cl_htmlb_textedit,
      tabix(6)       TYPE c,
      binding_code   TYPE string,
      binding_str    TYPE string.
textedit_count = o_model->get_section_count( ).
DO textedit_count TIMES.
* Create a unique ID for a textEdit field:
tabix = sy-index.
CONDESE tabix NO-GAPS.
* String for the data binding of internal table model->data_stream_tab:
CONCATENATE '//model/data_stream_tab['
              tabix
              '].data_string'
         INTO binding_str.
* Dynamic data binding:
CREATE OBJECT o_textedit.
CONCATENATE 'myTextEditID' tabix
         INTO o_textedit->id.
o_textedit->width = 650.
o_textedit->height = 225.
o_textedit->_text = binding_str.
binding_code = o_textedit->IF_BSP_BEE~RENDER_TO_STRING( page_context ).
<htmlb:label for = "<%= o_textedit->id %>"
            text = "<%= o_textedit->id %>"
          design = "EMPHASIZED" />
<%-- Binding of the attribute (internal table) '//model/data_stream_tab<i>.data_stream' --%>
<%= binding_code %>
ENDDO.
Obviously the <u>whole</u> contents of the <i>textEdit</i> fields in the coding above are <u>always</u> "moved" from the web browser to the server and vice versa when the button <b>[Add textEdit field]</b> is hit every time even though the content of some <i>textEdit</i> fields haven't changed.
Does anyone have a good solution/optimization for this problem? Any suggestion, comment and/or answer will be very appreciated.
Thanks
HW

Place this code above any textedit elements you have in your page:
<script type="text/javascript">
var myFields = new Array();
</script>
Then place this code after every textedit elements, this code will get run when the page is loaded in the browser, right after your element. You are saving the ID and the default value of your element to an array. For every further element, increase the array counter by 1!
<script type="text/javascript">
myFields[0] = new Object();
myFields[0]["id"] = 'myTextEdit1';
myFields[0]["default_value"] = document.getElementById(myFields[0]["id"]).value;
</script>
Finally, include this function in your page (does not have to be at the bottom, I just put it here chronologically):
<script type="text/javascript">
function compareFields() {
for (var i = 0; i < myFields.length; ++i) {
    if(myFields<i>["default_value"] == document.getElementById(myFields<i>["id"]).value) {
    // nothing has changed, set to ignore-value (any highly unlikely value, like ")?.("
    document.getElementById(myFields<i>["id"]).value = ')?.(';
    // check against this value in your setter method
    // if this is set, then do not user submitted value to update your model attribute value
    // maybe do some output for debug purposes
    // alert(document.getElementById(myFields<i>["id"]).value);
}</script>
Now add this attribute to your submit button:
onClientClick = "javascript:compareFields();"
This should do, test it out and let me know.
Max

Dynamic table & data binding

Hi all,
I am trying to create an interactive form in WebDynpro ABAP (using Livecycle Designer 8.0).
This application consists of two screens.
I have a selection screen which populates an internal table in a context node.
The next screen has the interactive form and should create the table dynamically to match the internal table.
I can see the context on this screen as I inserted a simple WD table UI element and it displays the data.
I created my form in the wizard here which allows you to set the interface to be a context node in the application. However the binding is not working at all. In fact when I set the binding attribute in the various subforms, rows etc I get a warning message
"Using 'Normal' data binding when a default data connection is defined may produce undesirable results"
Has anyone experienced this before or can anyone tell me how to set up a dynamic, bound table in WebDynpro ABAP?
Thanks,
Gregor

Hi Gregor,
From your information, I can say that you are having two Views. In the First View you have a selection screen and by the selection screen you are filling the Internal Table which is being used in the next View.
To display the Internal in the Adobe Interactive Form from WebDynpro. Firstly you need to create a main context node and in that context node create another sub node with Cardinality "0..n" and Selection "0..1"and link that to a Table or Structure or leave that blank. i you left blank create attributes of your own or select from the table or structure you have referenced.
Now in the Method you fill sub node after all the select statements written and at end write a code "sub_node_name->bind_table ( internal_table )".
Now after filling the template source it asks for the interface, when filling select the main context node.
I think this will solve your problem.
Regards
Pradeep Goli

How to bind dynamic row data to submit it by HTTP submit (PHP) - addInstance and Data Binding

Hi,
i have got a problem with submit HTTP all data (variables) from PDF to submit.php.
I have got table with dynamic add/remove Table Row button. When i add it their names are Table.Row[0] , Table.Row[1], Table.Row[2] etc. Only Table.Row is real, and every other row is create dynamically by addInstance script command.
When i fill "Data Binding" box like this: "Use name(Row)" then after submiting it do PHP i will see only last Table.Row data. For example if last would be Table.Row[3] then i will see only this on my submit.php and the others will be replaced by this value. This is happen becouse of replacing value by value with the same name (data binding is seeing only one Table.Row without instance name:"[1]", "[2]", "[3]" etc.).
I guess that if i would change something to get addInstance command with Row names like Row1, Row2, Row3 then all will be ok.
Another way it`s to change something in the "Data Binding" box (Object > Binding Tab) to get relative name like Row[*] instead of "Use name(Row)".
I don`t know how to solve it and i need your help

Create a binding for your dataTable.
In the binding create a UIData element with gettters and setters.
You can manipulate rows and columns from it.

How to bind dynamic data to JNet

Develop tools: NWDS 7.1
Server: Windows2000
Does anyone have experiences with using JNET within Webdynpro Project ?
In our case, we use JNet to generate a hierachical network diagram in the Webdypro's GUI. The data source is from the tables in a DB. However, till now, we only know how to let JNet generate the network diagram from a static XML file.
Since the data in the DB changes all the time, how to let the network diagram reflect the newest data status automatically? That is, how to bind JNet to a dynamic data source then?

Hi,
Network UI element is related with Jnet. What you need to start up working with this is you need to create a context structure mentioned below.
Node:Source
Element--- xml -> this should be of type binary.
Place the following code in the init.
ISimpleTypeModifiable mod = wdContext.nodeSource().getNodeInfo().getAttribute("xml").getModifiableSimpleType();
IWDModifiableBinaryType bin = (IWDModifiableBinaryType)mod;
bin.setMimeType(new WDWebResourceType("xml", "application/octet-stream", false));
ISourceElement element =wdContext.nodeSource().createSourceElement();
wdContext.nodeSource().addElement(element);
try
fileName = WDURLGenerator.getResourcePath(wdComponentAPI.getDeployableObjectPart(), "jnettest.xml");
element.setXml(readFile(fileName));
catch (WDAliasResolvingException e)
You have to place the Jnet test.xml under the mimes folder of your application.
Place the network element in the view and in the data source specify the context attribute source.xml
if your xml file complies with the jnet schema your application will render it.
Pl go through this
Using the "Network" UI Element
Regards
Ayyapparaj

Empty Shared Variables & Data Binding not working in dynamically called VI

Hi,
I have just upgraded a system from LabVIEW 2011 to 2012 DS2. I have a real-time PXI system running several shared variables, hosted on the PXI.
After what appeared to be a succesful upgrade I have a couple of odd issues.
1. The PXI writes test data into a network shared variable, based on a typedef of an array of custom clusters. The variable is disconnected from the typedef, as RT does not function with shared variables linked to typedefs. It seems that writing a seingle entry to the array is fine, but writing multiple entries causes the variable to appear empty.
I still need to debug this a little more, as while I was station to do so this other issue popped up.
2. I have some controls on the Host app with data binding to shared variables. The host app uses three VIs dynamically called into the wrapper VI. One of these called VIs is not able to connect to its variable when inserted in to the wrapper, but it can if run independently. The other two have no such trouble. Where I see a problem, the indication LED is grey and the mouse-over text reads "no status". What does this mean?
Any clues?
Thanks,
Ian

I have changed the Invoke Node to a Run Asynchronous node, and this seems to have fixed the data binding issue.
The other issue may be related to a bug fixed in 2012 SP1:
368648 Network Stream operations return Error 42 when data type contains nested clusters of typedefs
I am now getting error 42 when reading a particular network shared variable. This variable contains the results of measurements, in a data type which contains an array of nested clusters of typedefs. When there is a single entry in the array I can read the variable fine, but when there is more than one entry in the array it does not read and I get error 42.
I have downloaded 2012 SP1, and will see if this helps.
Ian

"Data binding will not be able to detect assignments" alert - but no runtime error

I have a class that is instantiated as hhgrab, it has an
array declared like:
[Bindable]
public var resultData:ArrayCollection = new
ArrayCollection();
In my MXML file, I bind that array to a datagrid like:
<mx:DataGrid x="19" y="283" width="383"
dataProvider="{hhgrab.resultData}">
But I am given a warning that says "Data binding will not be
able to detect assignments to hhgrab"
I googled this and saw that this alert is thrown when a
variable was not declared as bindable, but mine is. Could this be a
Flex Builder 3 bug?
Thanks..

I made hhgrab bindable:
package components
public class MyAC
import mx.collections.ArrayCollection;
[Bindable]
public var resultData:ArrayCollection = new
ArrayCollection();
public function MyAC():void {
resultData = ArrayCollection([
{Month:"January", Profit:2000, Expenses:1500, Amount:450},
{Month:"February", Profit:1000, Expenses:200, Amount:600},
{Month:"March", Profit:1500, Expenses:500, Amount:300},
{Month:"April", Profit:500, Expenses:300, Amount:500},
{Month:"May", Profit:1000, Expenses:450, Amount:250},
{Month:"June", Profit:2000, Expenses:500, Amount:700}
<?xml version="1.0"?>

<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml">
<mx:Script><![CDATA[
import components.MyAC;
[Bindable]
private var hhgrab:MyAC = new MyAC();
]]></mx:Script>
<mx:DataGrid x="19" y="283" width="383"
dataProvider="{hhgrab.resultData}"/>
</mx:Application>

Dynamic context binding in web dynpro alv

I use dynamic context binding (see code below to show and edit the ALV table.
'DB_TABLE' is a tranparent table. It works fine.
But now this table should be expanded with additional fields which are only known at runtime and could be different from case to case.
How can I get these fields in the context dynamically?
DATA:
        rootnode_info TYPE REF TO if_wd_context_node_info,
        dyn_node      TYPE REF TO if_wd_context_node,
        tablename   TYPE string.
rootnode_info = wd_context->get_node_info( ).
tablename = 'DB_TABLE'.
cl_wd_dynamic_tool=>create_nodeinfo_from_struct(
    parent_info = rootnode_info
    node_name = tablename
    structure_name = tablename
    is_multiple = abap_true ).
DATA:
        stru_tab TYPE REF TO data.
FIELD-SYMBOLS: <tab> TYPE table.
CREATE DATA stru_tab TYPE TABLE OF (tablename).
ASSIGN stru_tab->* TO <tab>.
SELECT * FROM (tablename) INTO CORRESPONDING FIELDS OF TABLE <tab>.
dyn_node = wd_context->get_child_node( name = tablename ).
dyn_node->bind_table( <tab> ).

You should create a structure dynamically and use this as the context structure. See the coding below, where a structure is created, which contains CARRID and CONNID.
DATA: node_info type ref to if_wd_context_node_info,
      struct_type TYPE REF TO cl_abap_structdescr,
      table_type type ref to cl_abap_tabledescr,
      comp_tab    TYPE cl_abap_structdescr=>component_table,
      comp        LIKE LINE OF comp_tab,
      my_table    type ref to data,
      my_row      type ref to data.
field-symbols: <table> type table,
                 <row> type data,
                 <flight> type sflight.
* build a structure description from the list of single fields
comp-name = 'CARRID'.
comp-type ?= cl_abap_datadescr=>describe_by_name( 'S_CARR_ID' ).
APPEND comp TO comp_tab.
comp-name = 'CONNID'.
comp-type ?= cl_abap_datadescr=>describe_by_name( 'S_CONN_ID' ).
APPEND comp TO comp_tab.
* note this structure contains the fields "CONNID" and "CARRID"
struct_type = cl_abap_structdescr=>create( comp_tab ).
* now the nodeinfo is created
node_info = wd_context->get_node_info( ).
node_info = node_info->add_new_child_node(
    name                         = 'MY_NODE'
    IS_MANDATORY                 = ABAP_true
    IS_MULTIPLE                  = ABAP_true
    STATIC_ELEMENT_RTTI          = struct_type
    IS_STATIC                    = ABAP_false
* fill new node;
data: l_node type ref to if_wd_context_node,
        l_flight type STANDARD TABLE OF sflight.
l_node = wd_context->get_child_node( 'MY_NODE' ).
l_flight = wd_assist->get_flights( ).
* if you could create a local data type, would be fine, but if you have to do it dynamically ...
struct_type = node_info->GET_STATIC_ATTRIBUTES_TYPE( ).
* create tabledescriptor from structdescription (standard table, no keys)
table_type = cl_abap_tabledescr=>create( p_line_type = struct_type ).
create data my_table type handle table_type.
assign my_table->* to <table>.
loop at l_flight assigning <flight>.
    create data my_row type handle struct_type.
    assign my_row->* to <row>.
    move-corresponding <flight> to <row>.
    append <row> to <table>.
endloop.
l_node->bind_table( <table> ).

JSF and dynamic data

Hi,
This is not a specific question but rather a high level concept that I'm trying to figure out. I have a system that uses a lot of dynamic data that is handled and viewed in the form of Dynabeans as well as SDO data objects.
I'm working on trying to develop reusable web widgets such as input forms based on these objects and thought of JSF right away.
However its seems like JSF will only work with static data models because the beans and bean properties need to be specified at design time in the xml configuration files.
Here it is: Lets say I have a dynamic java bean with dynamic properties that was created from a metadata object. Now I want to develop a single reusable JSF widget that will create an input form using the information from the metadata object and then connect the widget values to the actual dynamic data object.
Seems like in order to do this, the properties of the dynamic data object need to be defined at runtime so that you can classify it as a managed bean so that JSF knows how to bind values from a widget to a bean.
Does anyone have any thoughts?

Hi.
ValueBinding and MethodBinding work through PropertyResolver, VariableResolver
#{aaaa.bbbb.cccc}aaaa - will be resolved with VariableResolver (root object)
bbbb and cccc - with PropertyResolver
Look at the description of the default realisation of VariableResolver
You will see in which places it searches for a root object. At least it searches in the request, session and application maps. You can just put your dynamic beans in one of this maps.
At the worst case you can substitute implementation of the VariableResolver in faces-config.xml
<application>
<variable-resolver>com.qqqqq.MyVariableResolver</variable-resolver>
<property-resolver>com.qqqqq.MyPropertyResolver</property-resolver>
</application>
...Good luck

Building my own data-binding method

Hi,
After looking at the various packages that allow you to do data-binding I have decided for my case it's just simpler (number of lines) to do something myself.
If I have an XML that has fields a through f, which correspond to A through F in MySQL fields. What's the best way to connect these two?
What's the best type to build this thing in? Maps, HashMaps, or Collections? I just don't know the advantages/disadvantages to each obviously.
Thanks.

amirzadeh wrote:
jschell wrote:
My question wasn't clear.
For example if you have a customer entity and has one telephone number and now the users want it to have two telephone numbers then you must add a column to the database. And if you do a B2B xml with that data then you must upgrade the XML to add that new field.
That process is replicated in about 99.9% of all business processing and most of that does not need a runtime solution to the problem.
So the question becomes
1. How often do the requests arrive?
2. What is the nature of the request - how complex is it?"We would like to have dataPoint123 added to the excel file that we get every day" sort of thing, so we have to check to see if we have the data stored in the database, if not than we have to go back to the appliance and add it to the XML report that is generated. Than add it to the database to be stored. Modify the import of the XML code. Add in the data processing portion of the code if need be, add it to the export report.
If you are doing 50 of these a day and they are all simple then your design if flawed because you cannot continue to add that many columns to existing tables. This is further complicated if you are differentiating it by user (some users have different fields from others.) Again it would still represent a design flaw.It's more like 1 every two to three weeks. And since we don't touch the code every day it becomes a pain when something like this has to change, because we have to go find it in the 17 different places it needs to be touched.
The phrase "17 places" suggests a disconnect with what you described above. With "17 places" you have at a moderately complex change request.
And your description above doesn't sound like something that you can pattern.
If I have a database with tables/columns and the users request a change to a report frequently which originates with existing data then automating the report creation might be a worthwhile project. Myself with the given timeline I would opt for code generation rather than a runtime solution.
However if the data doesn't exist then you MUST rollout a code change. The DDL must change, you must have code to populate it, and perhaps other business rules are added. And that is unlikely to be something that can be patterned. Actually only way that could be patterned would be in a flow through system (source in => database => report)
>>
If on the other hand you get one of these every 6 months then you do not need a dynamic solution (at all.)I don't agree with the statement, I think "dynamic" nature of code is even more important with code that you don't touch/live with every day. I have C code that I live with every day, it's always been improved and worked on, I rarely do anything majorly dynamic in there, because I don't need it. It's faster than I need it to be, the foot print is small comparatively and it is changes too often to try to modularize it.
That paragraph seems contradictory. Or maybe it is a terminology issue.
"Dynamic" for this discussion relates to code generation, generalization (adding complexity in tradeoff for power), metadata type solutions, etc.
That said maintenance is the highest cost in software development. To maintain code someone must understand it. Adding a "dynamic" solution (above definition) into code means that it will take longer to find and fix bugs. And without rigorous process control over time it is likely to lead to more 'hacks' because someone couldn't figure out the correct way to fix something or because the existing design didn't allow for it and they didn't refactor.
Thus one must consider the tradeoffs carefully.
Note that with code generation one can achieve simplicity with ease of use. I do this commonly because I do not want to require other developers to understand the code creation process. So I create code generation tools to ease my work but check in the generated code so that if some other developer needs to maintain it they can work with that. I check in the tools to but at the point where they start maintaining the code it is their choice which route to use.

Unable to find information on WS data binding error on WLS 9.2.03 startup

Frustratingly, when I Google for "WS data binding error" I get 'old' links to BEA forum issues which may help but these are nowhere to be seen on the read-only copies now on Oracle forums here :- http://forums.oracle.com/forums/category.jspa?categoryID=202.
The link I'm looking for is:-
forums.bea.com/thread.jspa?threadID=600017135
Is there anywhere I can get access to this information or should I just post new items on the new WLS forum?
Many thanks.
p.s. the errors I am trying to research are as follows:-
<WS data binding error>could not find schema type '{http://xmlns.oracle.com/apps/otm}Transmission
<WS data binding error>Ignoring element declaration {http://xmlns.oracle.com/apps/otm}Transmission because there is no entry for its type in the JAXRPC mapping file.

Check this..
http://docs.oracle.com/cd/E10291_01/doc.1013/e10538/weblogic.htm
you can ignore those warnings
The following data type binding warnings and errors are displayed during deployment and start of Decision Service (Business Rules) Applications. These errors and warnings can be ignored.
<WS data binding error>could not find schema type '{http://www.w3.org/2001/XMLSchema}NCName
<WS data binding error>could not find schema type
'{http://websphere.ibm.com/webservices/}SOAPElement
java.lang.IllegalStateException
at weblogic.wsee.bind.runtime.internal.AnonymousTypeFinder$GlobalElementNode.
getSchemaProperty(AnonymousTypeFinder.java:253)

Report data binding error unknown column name

Hi,
I am having a problem with the new 7.02 update of Report
Builder. The issue is it's not finding my SQL query.
I have wrote my query initally in the advance mode, and it
doesn't seem to reconize it. Is there an issue with this?
I did manage to fix one of my reports by using the basic mode
and selecting all my tables and seting my linkage and criteria.
I have other computers that i have not updated to 7.02 and
they do not have this issue. Below is the error:
Error Occurred While Processing Request
Report data binding error Unknown column name : work_phone.
Please try the following:
Check the ColdFusion documentation to verify that you are
using the correct syntax.
Search the Knowledge Base to find a solution to your problem.
Browser Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0;
.NET CLR 1.1.4322; .NET CLR 2.0.50727)
Remote Address 127.0.0.1
Referrer
Date/Time 13-Jul-06 02:33 PM
Stack Trace (click to expand)
coldfusion.runtime.report.Report$ReportDataBindingException:
Report data binding error Unknown column name : work_phone.
at
coldfusion.runtime.report.Report.runReport(Report.java:420)
at
coldfusion.filter.ComponentFilter.invoke(ComponentFilter.java:96)
at
coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:225)
at
coldfusion.filter.BrowserDebugFilter.invoke(BrowserDebugFilter.java:52)
at coldfusion.filter.PathFilter.invoke(PathFilter.java:86)
at
coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:69)
at
coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:2 8)
at
coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38)
at
coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38)
at
coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22)
at coldfusion.xml.rpc.CFCServlet.invoke(CFCServlet.java:106)
at coldfusion.xml.rpc.CFCServlet.doGet(CFCServlet.java:157)
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at
org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
at
javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at
coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:78)
at
jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:91)
at
jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)
at
jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:257)
at
jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:527)
at
jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService.java:204)
at
jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:349)
at
jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:457)
at
jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:295)
at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)
This report works in 7.01. So all query variables match with
a variable in the SQL select statement.
Anyone have any Ideas??
Thanks,
Daniel

Thank you very much for help.
The "Unknown column name " is a field still used in my
report, so I can't remove it.
After I clear the query in the report and reopen the report
and apply the same query back to it, I get different error message:
Element TASKNUM is undefined in QUERY.
The error occurred in : line 1
-1 : Unable to display error's location in a CFML template.
I know for sure this "Element TASKNUM is undefined in QUERY."
is defined in query. each time it complains something different. I
get really confused.
Thanks again.
Yueming

The data binding isn't working, what have I done wrong?

I'm writing a very simple WPF app, one view. I've got a few models defined for the small handful of tables this app works with. I'm making some sort of boneheaded mistake, but I can't see what it is. I'm trying to bind to a property of one of the model
classes I've define, to a textbox in a stackpanel. Here's the XAML:
<StackPanel Orientation="Horizontal" Margin="0, 5" DataContext="{Binding cvsSpecMapping}">
<TextBlock Margin="10,0,5,0">Specimen Mapping: </TextBlock>
<TextBox x:Name="txtHl7SpecMap"
Text="{Binding HL7SpecimenTypeName}"
ToolTip="{Binding HL7SpecimenTypeName}"
MinWidth="50"
MaxWidth="100"
MaxLength="250" />
</StackPanel>
Earlier in the same XAML file I've got the following collection view source defined in the windows' resources:
<CollectionViewSource x:Key="cvsSpecMapping" />
This isn't rocket science. Here's the model class definition. I'm removing all but the relevant property:
using System;
using System.ComponentModel;
using System.Runtime.CompilerServices;
namespace SpecMapException.Models
* This class I am interested in knowing what properties change.
* Also note that the properties in this class do NOT represent all of the properties
* in the Prism.SpecimenMapping table. It only represents what this application has
* to store.
public class SpecimenMapping : INotifyPropertyChanged
private const int MAX_HL7SPECIMENTYPENAME_LEN = 250;
#region class properties
private string _hl7SpecimenTypeName = "";
public string HL7SpecimenTypeName
get { return _hl7SpecimenTypeName; }
set
if (value != _hl7SpecimenTypeName)
_hl7SpecimenTypeName = EnforceMaxLength(value, MAX_HL7SPECIMENTYPENAME_LEN);
NotifyPropertyChanged();
#endregion //class properties
#region local routines
private string EnforceMaxLength(string PassedValue, int MaxLength)
if (PassedValue.Length <= MaxLength)
return PassedValue;
return PassedValue.Substring(0, MaxLength);
#endregion
#region PropertyChanged code
* The usual property changed code.
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
#endregion
And lastly here's the relevant code which I've put into the windows Loaded event:
Models.SpecimenMapping sm = null;
private void Window_Loaded(object sender, RoutedEventArgs e)
var cvsSpecMapNames = (CollectionViewSource)(this.FindResource("cvsSpecMapping"));
cvsSpecMapNames.Source = sm;
So what is the mistake that I've made? Why isn't the data binding to the textbox txtHl7SpecMap working?
(I'm using VS 2013, .NET 4.5.)
Rod

cvsSpecMapping is a resource and not a property so you should set the DataContext using the StaticResource markup extension instead of Binding:
<StackPanel Orientation="Horizontal" Margin="0, 5" DataContext="{StaticResource cvsSpecMapping}">
Also, the Source property of a CollectionViewSource is supposed to be set to a collection:
private void Window_Loaded(object sender, RoutedEventArgs e)
sm = new Models.SpecimenMapping();
var cvsSpecMapNames = (CollectionViewSource)(this.FindResource("cvsSpecMapping"));
cvsSpecMapNames.Source = new List<Models.SpecimenMapping>() { sm };
You may also want to set a default value of the HL7SpecimenTypeName property to confirm that the binding actually works after you have done the above changes:
public class SpecimenMapping : INotifyPropertyChanged
private const int MAX_HL7SPECIMENTYPENAME_LEN = 250;
#region class properties
private string _hl7SpecimenTypeName = "def....";
public string HL7SpecimenTypeName
get { return _hl7SpecimenTypeName; }
set
if (value != _hl7SpecimenTypeName)
_hl7SpecimenTypeName = EnforceMaxLength(value, MAX_HL7SPECIMENTYPENAME_LEN);
NotifyPropertyChanged();
Hope that helps.
Please remember to mark helpful posts as answer to close your thread and then start a new thread if you have a new question.

Report data binding error with date values

I have CF7.02 with a Microsoft Visual FoxPro 9.0 SP1 Database
that I connect to using ODBC (FoxPro Driver 6.01.8630.01). I send
my sql results to a CF Report Builder 7.02 PDF report and it works
fine. If I dump the date values before I change them, they look
like the following: {ts '2004-12-20 00:00:00'} . However I have
tried a number of ways of manipulating the date before sending it
to the report, but I continue to get errors. I don't care what
format they go to the report in, since the report reformats them
anyway. I checked to make sure that none of the dates were null.
For example <cfset ReportQuery.PrcInputDate[lcCurRow] =
CreateODBCDateTime(#ldCFPrcInputDate#) /> yields values in the
{ts '2004-12-20 00:00:00'} format when I dump the query results to
screen. Where:
ldCFPrcInputDate = 12/20/2004
CreateODBCDateTime(ldCFPrcInputDate) = {ts '2004-12-20
00:00:00'}
ReportQuery.PrcInputDate[lcCurRow] = {ts '2004-12-20
00:00:00'}
I get the error:
Report data binding error Unable to get value for field
'prcinputdate' of class 'java.util.Date'.
coldfusion.runtime.OleDateTime -> Date
Not using the CreateODBCDate function for example <cfset
ReportQuery.PrcInputDate[lcCurRow] = #ldCFPrcInputDate# /> I
get:
Report data binding error Unable to get value for field
'prcinputdate' of class 'java.util.Date'.
java.lang.String -> Date
Here are some of my failed attempts:
<cfset ReportQuery.PrcInputDate[lcCurRow] =
CreateODBCDateTime(#ldCFPrcInputDate#) />
<cfset ReportQuery.PrcInputDate[lcCurRow] =
#ldCFPrcInputDate# />
<cfset ReportQuery.PrcInputDate[lcCurRow] =
DateFormat(CreateODBCDate(#ldCFPrcInputDate#),'mm/dd/yyyy') />
<cfset ReportQuery.PrcInputDate[lcCurRow] =
CreateODBCDate(DateFormat(#ldCFPrcInputDate#,'mm/dd/yyyy') />
<cfset ReportQuery.PrcInputDate[lcCurRow] =
CreateODBCDate(DateFormat(#ldCFPrcInputDate#,'mm-dd-yyyy') />
<cfset ReportQuery.PrcInputDate[lcCurRow] =
Trim(createODBCDateTime(ldtmpdate)) />
<cfset ReportQuery.PrcInputDate[lcCurRow] =
CreateODBCDate({05-07-2006}) />
<cfset ReportQuery.PrcInputDate[lcCurRow] =
CreateODBCDate('{05-07-2006}') />
<cfset ReportQuery.PrcInputDate[lcCurRow] =
CreateODBCDate(05/07/2006) />
<cfset ReportQuery.PrcInputDate[lcCurRow] =
CreateODBCDate('05/07/2006')/>
<cfset ReportQuery.PrcInputDate[lcCurRow] =
CreateODBCDate(parseDateTime('05/07/2006')) />
<cfset ReportQuery.PrcInputDate[lcCurRow] =
parseDateTime(CreateODBCDateTime(05/07/2006)) />
<cfset ReportQuery.PrcInputDate[lcCurRow] =
parseDateTime(CreateODBCDateTime('#ldCFPrcInputDate#')) />
<cfset ReportQuery.PrcInputDate[lcCurRow] = '{05-07-2006}'
/>
<cfset ReportQuery.PrcInputDate[lcCurRow] = '{05/07/2006}'
/>
<cfset ReportQuery.PrcInputDate[lcCurRow] = '05/07/2006'
/>
I also did some googling without success. Any help is
appreciated.

You may want to make sure that the column is not included in
the query variable list in your report cfr file.
The newest version of the Report Builder, which may be
installed on the server, no longer tolerates vars appearing in that
list of they are not in the query itselft.

Displaying header with data binded to the R/3 system

hi
I have developed an application which uses Interactive form to generate the Invoice PDF by getting data from back end system R/3.
Now my problem is that the Header which I need to display contains some data binded with the back end system and that the Header needs to be displayed on each and every page of the Invoice.
I need to know how can we set the header so that the header is displayed on each page with the data binded to the back end system.
Immediate help would be appreciated.
Thanks and regards,
kris

Hi Gopi,
There is a limitation for your requirement.The runtime data will not change in each page or it will be blank in case of header.
I have used an alternative for the forms designed from SFP .I have called the PDF in a loop in the driver program. Then a new pdf will generated for each case.
May be the alternative is assign the values through scripting.
pavan meda

Dynamic Data Binding at runtime

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