Can't activate direct data access for VProvider

I try to activate direct data access for BC VirtualProvider 0TR_CM_1. When I open "Activate Direct Access" dialog I don't see any assigned source systems in "Source Syst. for InfoSource 3.x" nor any in "Data Transfer Processes" tabs. Does it mean what non of source systems don't have direct access data sources? Or in other words - why I can't assign any source system for the BC VProvider?

Hi,
While creating datasource there is an option for direct access.This option shows if the DataSource supports direct access to data.
A RemoteProvider in BI can only get data from a DataSource that supports direct data access.
It is only useful to access data directly if the quantity of data to be extracted can be restricted to a suitable selection.
Hope this helps
Regards
Karthik

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Hello
I am doing one experiment on Data Access. In traditional system We have to write each Insert, Update, Delete code in data access for each table.
My City Table Class:
public class TbCitiesModel
string _result;
int _cityID;
int _countryID;
string _name;
int _sortOrder;
bool _enable;
DateTime _createDate;
string _countryName;
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get { return _createDate; }
set { _createDate = value; }
public string countryName
get { return _countryName; }
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Generic Code:
public List<T> DisplayCitiesT<T>(T TB, string spName)
var categoryList = new List<T>();
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using (SqlCommand command = new SqlCommand(spName, connection))
command.CommandType = CommandType.StoredProcedure;
foreach (var prop in TB.GetType().GetProperties())
string Key = prop.Name;
string Value = Convert.ToString(prop.GetValue(TB, null));
if (!string.IsNullOrEmpty(Value) && Value.Contains(DateTime.MinValue.ToShortDateString()) != true)
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TbCitiesModel c = new TbCitiesModel();
Program p = new Program();
List<TbCitiesModel> lstCities = p.DisplayCitiesT<TbCitiesModel>(c,"STCitiesAll");
foreach (TbCitiesModel item in lstCities)
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1. The Traditional method took almost 58 - 59 - 58 - 59 - 59 seconds for 5 time
2. The Generic Method is took 1.4 - 1.3 - 1.5 - 1.4 - 1.4 [minute.seconds]
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1. So My question is can I used this method for real world applications ?? Or is there any performance optimization for this method?
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Owner | Software Developer at NULLPLEX SOFTWARE SOLUTIONS http://nullplex.com

Hi
Mayur Lohite,
Q1:It is not reasonable compared Generic Code with Traditional Code. The main issue not Generic.
After take a look at your Generic Code. Reflection code get slower in performance.
TB = Activator.CreateInstance<T>();
As Reflection is truly late bound approach to work with your types, the more Types you have for your single assembly the more slow you go on. Basically few people try to work everything based on Reflection. Using reflection unnecessarily will make your application
very costly.
Here is a good article about this issue, please take a look.
Reflection is Slow or Fast? A Practical Demo
Q2:Or is there any performance optimization for this method?
The article presents some .NET techniques for using Reflection optimally and efficiently.
optimizing object creation with reflection
Note optimize
reflection with Emit
method.
Best regards,
Kristin
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Hello Kristin
Please can you tell how I optimize reflection in my code.
public List<T> DisplayCitiesT<T>(T TB, string spName)
var categoryList = new List<T>();
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if (prop.Name != "result" && i <= (colCount - 1))
prop.SetValue(TB, reader[prop.Name], null);
i++;
categoryList.Add(TB);
return categoryList.ToList();
Thank you.
Owner | Software Developer at NULLPLEX SOFTWARE SOLUTIONS http://nullplex.com

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