unable to delete a record in Data grid view

Question

error is coming while i'm tryin to delete a record from data source grid view. error message is giving ."Must declare the scalar variable "@regid"." my delete query "DELETE from tablename where reg_id=@regid"

plz give me some solution

thanks Churchill

Answer 1

Did you add the paramater to Delete Command??

Add like this:

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="reg_id" CellPadding="4"
DataSourceID="SqlDataSource1" ForeColor="#333333" GridLines="None" Style="z-index: 100;
left: 0px; position: absolute; top: 0px">
<DeleteParameters>
<asp:Parameter Name="@regid" Type="int32" />
</DeleteParameters>
</asp:GridView>

Answer 2

If your query is in stored procedure you must declare a variable to pass the value

ie

CREATE PROCEDURE usp_Delete
   @regid INT
AS

DELETE from tablename where reg_id=@regid

But if your query is hard-coded to the application you can concatinate the variable to the query like this

String sql = "DELETE from tablename where reg_id=" + regid.Text