Pass a null value to an objectdatasource from dropdownlist default

Hi, I would like to pass a parameter to an objectdatasource from a dropdownlist.  The first Item of the dropdownlist reads "AllProducts" but when I pass it to the stored proc in the datasource i would actually like it to read null as the default.  How can I do this?

ddlProdSuite.DataSource = pscmd.ExecuteReader();
            ddlProdSuite.DataTextField = "PRODUCT";
            ddlProdSuite.DataValueField = "PRODUCT";
            ddlProdSuite.DataBind();
            psConn.Close();
            ddlProdSuite.Items.Insert(0, "AllProducts");        

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Scarlett72Asked:
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Daniel ReynoldsSoftware Applications Developer / IntegratorCommented:
Not sure that you will be able to pass a null, but you could do the following:
Pass in a unique value and if the stored proc receives that unique value substitute null once in the stored proc.
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xav056Commented:
Set the default value for the @AllProducts to null in the stored proc.
and in the .NET code check if the value selected is all products than don't pass the parameter,, this way the stored proc will execute with the default b\value being null
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