Passing NULL value not working

I currently have a stored procedure that looks something like this

SELECT * FROM tblQuestions WHERE Title LIKE ISNULL('%'+@.Name+'%', Title)

I have a form that supplies this value. This statement should make it so that if a NULL value is passed in, then it will return all the rows, if some text is specified, then it will not. On my SQLDataSource on the page where the parameter is supplied I have set ConvertEmptyStringsToNull to True, but when I say in my code,

SqlDataSource1.SelectParameters.Add("@.Name", TextBox1.Text);

It won't give me back any of the rows, I know that the stored procedure works fine because I can get it to work by a basic query and other testing on it, so somewhere in my form, the NULL value isn't being passed, I belive that it is passing an empty string and I don't know why. Thank you in advance

/jcarver

Try this:

WHERE ([Title] Like '%' + @.Name + '%') or ( @.Name is NULL)"

And add this to your SqlDatasource: CancelSelectOnNullParameter="False"

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The two where clauses are logically equivalent.

I'm a bit curious why you have a column called title and a parameter called @.name instead of @.title.

As for passing in a null, you could check the length of the textbox text, and if it's 0, send DBValue instead of the Text property.

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Try

IF @.Name IS NULL SET @.Name = ''

IF DATALENGTH(@.Name) > 0
SELECT * FROM tblQuestions WHERE Title LIKE '%'+@.Name+'%'
ELSE
SELECT * FROM tblQuestions

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SELECT * FROM tblQuestions WHERE Title LIKE '%' + @.Name + '%'

ConvertEmptyStringToNull must be set to False!

sql