Clear context in Web Dynpro

Hi,
I have created a table based on search crieteria.
The scenario is first time e.g user has given some selection, it will return 5 records. These 5 records will be displayed in the table.
Now, if user enter some selection, which does not return any record, in that case i'm displaying the error message.
For displaying the message, i'm using get_element_count method, if it's > 0, then it displays the table else display the error message. But the problem is even in second time, if there is no record return, get_element_count mehtod return 5 records of the first search.
How to clear the context, or how to proceed. I can change my condition for a temp solution, but pls let me know what is the best way to do this.
Thanks,

HI,
remove context function removes all the contexts and gives the value under main nide.
where are change context we can explicitly specify under which context should the value should be...
Your problem will solve here
Context Handling and User defined Functions
http://help.sap.com/saphelp_nw04/helpdata/en/ea/c1f1c4f47011d19a600000e8a4b41d/frameset.htm
For more information...
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/0f6991e5-0901-0010-e0b0-dc2a26cc0389
Just check this one also...good blog on context handling...
Introduction to Context Handling in Message Mapping
Introduction to Context Handling in Message Mapping
Remove context is different from the Context change.
Remove context does, it removes all the upper nodes of that particular node
where as Context change is used to set the context for that particular fields to satisfy the conditions
Context Change
http://help.sap.com/saphelp_nw04s/helpdata/en/35/fb8c4057d5701de10000000a1550b0/frameset.htm
Remove Context
http://help.sap.com/saphelp_nw04/helpdata/en/1f/ea0fb12403844bbb6c4cbc8a00cda9/content.htm
else use the Invalidate() function
Thanks
Suresh

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Clearing Context in Web Dynpro applications

Hi All,
I am using a view that is called from multiple places based on different criteria. This view has a table that is fed from the custom controller. Some of the context data for this custom controller are being set from the other views. I need to clear the resultset of the custom controller and retain the input data from the other views. Is there any simple way of clearing data in the context node? I tried invalidating the node, context but nothing seems to work. Any suggestion what I might be doing wrong?
Thanks and regards,
Hemanth

hi Hemanth,
Where are u trying to invalidate the node. What is the exact scenario.If u want the custom controller to be updated in different views... u can say
wdThis.wdGet<contr name>Controller().wdGetContext().node<name>().invalidate();
in the init of the view where the value of the custom controller is updated.
Is the problem with invalidate or with the updation in values.Invalidate will always work if u set the lead selection properly.
If u cud elobarate more on the problem someone could really help u out...
Regards
Bharathwaj

Clear context in Web Dynpro View

Hi,
I have created a table based on search crieteria.
The scenario is first time e.g user has given some selection, it will return 5 records. These 5 records will be displayed in the table.
Now, if user enter some selection, which does not return any record, in that case i'm displaying the error message.
For displaying the message, i'm using get_element_count method, if it's > 0, then it displays the table else display the error message. But the problem is even in second time, if there is no record return, get_element_count mehtod return 5 records of the first search.
How to clear the context, or how to proceed. I can change my condition for a temp solution, but pls let me know what is the best way to do this.
Thanks,

Hi
you can use the method invalidate method of interface if_wd_context_node to clear all the elements of a node.
Regards
Naresh

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Hello,
I found this documentation:
Implementation of Interfaces for Customer Developments
Using interfaces in a Web Dynpro component benefits customers by giving them a clean basis for their own further developments. When creating a local development, you can implement a used interface in a separate component and add your own aspects to an application delivered by SAP.
http://help.sap.com/saphelp_nw70/helpdata/en/a9/19eebc1e2943dbb2d443095d017ae9/content.htm.
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How to get Portal User Context in Web Dynpro application

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Hi ,
you can use the below code to get User details and add com.sap.security_2.0.0 > lib > com.sap.security.api.jar
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thank you.
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Hello Saravanan,
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Map context node web dynpro to context DATA of interface controller ALV

Hi Experts,
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Best Regards
CB

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Hello,
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Clear/refresh(F5) fields in web dynpro application view

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Hi,
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hope it's clear now.
Regards,
Kiran

Cannot see Ecatt option in context menu in web dynpro abap in SE80 ECC 6.0

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Ghazanfar

Web Dynpro context field limitation for the form

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Message was edited by: Anjali Joglekar

Hello,
I think I found the issue. The structure I was using had many fields with data type declared has STRING (with no definite length), in such cases the context is not copied over to the form.
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Context not updated from adobe from fields to ABAP web dynpro every time

Hi,
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https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/media/uuid/c766e918-0b01-0010-99b1-c2b78cd059b3?prtmode=navigate
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Please provide the solution.......

Clear context in Web Dynpro

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