DataSource Controls :: Not Able To Run SQL Query Using If Else?

Apr 21, 2010

I am using Querystring "ddl4" to pass on value of a drop down list to the next page where I am using that value in the WHERE clause of a SQL command. I also need to check whether ddl4 is blank or not which I do using If Else in SQL command. I am not able to run the query where the Querystring ddl4 IS NULL

This is the sample link with the Querystring ddl4 carrying a blank value:

[code]....

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