ASP.NET Set variable if Request.QueryString does not exist

Question

I want to set a textbox.text to a certain value if Request.QueryString['EQCN'] does not exist. If it does exist, I would like to set it to the value of Requestion.QueryString['EQCN'].

It seems that if the value doesn't exist it defaults the value to be "".

Any ideas?

Thanks so much!!!

Guffa · Accepted Answer · 2011-09-26 13:51:23Z

5

If the parameter is not in the query string, the QueryString indexer will return a null reference, so you can use the ?? operator for a default value:

textbox.text = Request.QueryString['EQCN'] ?? "default text";

answered Sep 26, 2011 at 13:51

Guffa

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D'Arcy Rittich · Accepted Answer · 2011-09-26 13:44:23Z

3

textbox.text = string.IsNullOrEmpty(Request.QueryString["EQCN"]) ? "my value" : Request.QueryString["EQCN"];

answered Sep 26, 2011 at 13:44

D'Arcy Rittich

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