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How to get output return value from SqlDataSource in WebForms

- 14.11.22 - ErcanOPAK

When returning a string from a stored procedure as a return parameter, we must set it to a non-null value before the stored proc is called – even if it’s an output-only parameter.

So we’ll need to make your parameter have a direction of InputOutput and set a default value:

<asp:Parameter Name="MyReturnParameter" Type="String" Direction="InputOutput" DefaultValue="A Text As Default Value">

 

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