Hello Mark,
From your description, you're using SqlDataSource+DetailsView to insert
record into a certain table and the primary id of it is of autoincrement
column. therefore, you're wondering the proper way to let the DetailsView
or SqlDataSource get the autogenerated newid of the inserted record,
correct?
Based on my understanding, for such scenario, you should use the @@IDENTITY
or SCOPE_IDENTITY function(preferred) to get the new generated autoid after
executing your insert statement. I would suggest you create a stored
procedure for such insert scenario. e.g.
=============================
CREATE PROCEDURE [dbo].[usp_insert_item]
@name varchar(50),
@description varchar(300)
AS
BEGIN
insert items ([name],[description]) values(@name, @description)
declare @autoid bigint
set @autoid = SCOPE_IDENTITY()
return @autoid
END
==============================
Then, in your ASP.NET webpage's SqlDataSource, set insert commandtype as
"StoreProcedure" and statement set to the SP name. The IDE can help you
autogenerated the necessary parameter(include the returnvalue parameter)
e.g.
=====================
............................
<InsertParameters>
<asp:Parameter Direction="ReturnValue" Name="RETURN_VALUE"
Type="Int64" />
<asp:Parameter Name="name" Type="String" />
<asp:Parameter Name="description" Type="String" />
</InsertParameters>
</asp:SqlDataSource>
===================
Thus, you can use the "SqlDataSource.Inserted" event to get the return
value from the called store procedure:
====================================
protected void SqlDataSource1_Inserted(object sender,
SqlDataSourceStatusEventArgs e)
{
foreach (DbParameter param in e.Command.Parameters)
{
Response.Write("<br/>" + param.ParameterName + ": " +
param.Direction);
}
Response.Write("<br/>autoid: " +
e.Command.Parameters["@RETURN_VALUE"].Value);
}
===============
Also, instead of returnvalue, you can explicitly declare an output
parameter for your storeprocedure and use output parameter to get the auto
generated id.
Hope this helps.
Sincerely,
Steven Cheng
Microsoft MSDN Online Support Lead
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