how to update column use as ID Control without save null

Question

Hi Guys 

Salam

I use gridview convert fields as template deal with specific table , generally i have dropdownlist as control id of other dropdownlist works good as ID but when we update its save null

 

please slove this my problem

 

thanks

 

Code Source :

SortExpression="First_Supervisor">

" autopostback="True" <="" div="">

DataSourceID="SqlDataSource4" DataTextField="EmpName"

DataValueField="EmpName">

ConnectionString="<%$ ConnectionStrings:Cash_PlanConne %>"

SelectCommand="select EmpName from EmployeesBasic2 where job='Custodian_1'">

">

_______________________________________________________________________

DataSourceID="SqlDataSource43" DataTextField="ID_Number" Width="110"

DataValueField="ID_Number">

ConnectionString="<%$ ConnectionStrings:Cash_PlanConne %>"

SelectCommand="SELECT [ID_Number] FROM [EmployeesBasic2] WHERE ([EmpName] = @EmpName)">

PropertyName="SelectedValue" Type="String" />

">

 

 Thanks