asp.net - Filter GridDropDownColumn by ListTextField -

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i implemented first solution in: filtering listtextfield griddropdowncolumn

my code is:
aspx

<telerik:griddropdowncolumn datasourceid="sqldatasource2"  listtextfield="nm_comunidade" listvaluefield="id_comunidade"  uniquename="nm_comunidade_coluna" sortexpression="nm_comunidade" headertext="comunidade"  datafield="id_comunidade"dropdowncontroltype="radcombobox" footertext="" allowautomaticloadondemand="false" autopostbackonfilter="true" currentfilterfunction="startswith" allowvirtualscrolling="true"  showmoreresultsbox="true" itemsperrequest="10" filtercontrolwidth="100%" showfiltericon="false" columneditorid="nm_comunidade_editor"> </telerik:griddropdowncolumn>  <telerik:gridboundcolumn datafield="nm_comunidade" headertext="nm_comunidade" sortexpression="nm_comunidade" uniquename="nm_comunidade" display="false" readonly="true"></telerik:gridboundcolumn>

c# 

protected void gridcultos_itemcommand(object source, gridcommandeventargs e) {     if (e.commandname == radgrid.filtercommandname)     {         pair command = (pair)e.commandargument;         if (command.second.tostring() == "nm_comunidade_coluna")         {             e.canceled = true;             gridfilteringitem filter = (gridfilteringitem)e.item;             ((filter["nm_comunidade"].controls[0]) textbox).text = ((filter["nm_comunidade_coluna"].controls[0]) textbox).text;             command.second = "nm_comunidade";             filter.firecommandevent("filter", new pair(command.first, "nm_comunidade"));          }     } } protected void gridcultos_itemdatabound(object sender, griditemeventargs e) {     if (e.item gridfilteringitem)     {         gridfilteringitem item = e.item gridfilteringitem;         ((item["nm_comunidade_coluna"].controls[0]) textbox).text = ((item["nm_comunidade"].controls[0]) textbox).text;     } }

the filter working first time filter function "startswith" , after seems changing filter function "equalto".

the problem in aspx:

<telerik:griddropdowncolumn uniquename="categoryddcolumn" listtextfield="employeeid"     headertext="category name" listvaluefield="orderid" datafield="orderid" datasourceid="sqldatasource1"     allowvirtualscrolling="true" showmoreresultsbox="true" datatype="system.string"     itemsperrequest="10" filtercontrolwidth="100%" showfiltericon="false" footertext=""     allowautomaticloadondemand="false" autopostbackonfilter="true"> </telerik:griddropdowncolumn> <telerik:gridboundcolumn datafield="employeeid" uniquename="employeeid" display="false"> </telerik:gridboundcolumn>

the solution setting datatype="system.string" griddropdowncolumn , removing currentfilterfunction="startswith". filter work filter function "contains", ok.


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