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up vote 3 down vote favorite

How can i set sql parameters for an sqlDatasource in the code behind? I am trying like this:

int id=1;
SqlDataSource1.SelectCommand = "SELECT * FROM categ WHERE id=@id";
SqlDataSourceArticole.SelectParameters.Add("@id", id);
// and also like this:
SqlDataSourceArticole.SelectParameters.Add("id", id);

but it doesn't work? What am i doing wrong?

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up vote 6 down vote accepted

Make sure you add the select parameters before trying to set their default value.

i.e.

SqlDataSourceArticole.SelectParameters.Add("@id", id);
SqlDataSourceArticole.SelectParameters["id"].DefaultValue = id.ToString();
share|improve this answer
up vote 2 down vote

You can update the value by:

SqlDataSourceArticole.SelectParameters["id"].DefaultValue = id.ToString();

Using the default value can work in this case.

HTH.

share|improve this answer
    
i get 'System.NullReferenceException: Object reference not set to an instance of an object.' – hhh3112 Feb 9 '11 at 19:40
    
The ID parameter has to exist in markup; if you are programmably create the collection of parameters, then when you create the parameter, also set the default value. – Brian Mains Feb 10 '11 at 17:04

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