User Data source with matrix

Question

Hi all ,,
i have a question if you can help me :
i put choose from list in matrix but when i choose item didn't fill in the column and my code is :
** on create form
   oForm.DataSources.UserDataSources.Add("IDS", BoDataType.dt_SHORT_TEXT);
                SAPbouiCOM.Matrix Mat = (SAPbouiCOM.Matrix)oForm.Items.Item("12").Specific;
              //  SAPbouiCOM.EditTextColumn EC = Mat.Columns.It
                Mat.Columns.Item("V_ITM").ChooseFromListUID = "ITM";
                Mat.Columns.Item("V_ITM").ChooseFromListAlias = "ItemCode";
                Mat.Columns.Item("V_ITM").DataBind.SetBound(true, "", "IDS");
***on Item Event
    if ((pVal.ColUID== "V_4"))
                        //oForm.DataSources.UserDataSources.Item("IDS").ValueEx = val;
                         SAPbouiCOM.Matrix Mat = (SAPbouiCOM.Matrix)oForm.Items.Item("12").Specific;
                  //  SAPbouiCOM.EditTextColumn EC = Mat.Columns.It
                         SAPbouiCOM.EditText c = null ;
                        try
                             oForm.DataSources.UserDataSources.Item("IDS").ValueEx = val;
                             Mat.LoadFromDataSource();

Answer 1

Hi folks, i know this thread is a little old but i have the same insue and i want to share the solution, it could help others.
Like Mayank said, get line and set line works the last row of the matrix, but is not true at all, GetLineData and SetLineData works for the row of the matrix that is set on the offset of DBDatasource lines, so to works fine you need to set the offset first.
oForm.DataSources.DBDataSources.Item("@MY_DS_LINES").Offset = x-1;
Mat.GetLineData(x);
oForm.DataSources.UserDataSources.Item("IDS").ValueEx = val;
// Update any other UserDataSources for the same row here...
Mat.SetLineData(x);
where x is the row number of the matrix you want to update.