I haveasp:GridView displaying client requests using asp:SqlDataSource. I want to limit displayed information by client:

View.aspx has to display everything, View.aspx?client=1 has to display only requests from client ID #1.

So I'm using <asp:QueryStringParameter Name="client" QueryStringField="client" /> for query "EXEC getRequests @client".

Everything works properly when some client is specified. But don't - if not.

I tested my SP using SSMS - it works properly in both cases - when parameter is specified and when it isn't (NULL passed explicitly).

What have I do?

asp.net .net sql-server sqldatasource querystringparameter
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