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string.isNullOrEmpty(SelectedItem.Value) not work
Hi
I have a drop down list in a aspx form which uses C#.
If I do not choose anything and pressed submit button, it throws nullreference exception.
But, I use the following code to check it in if condition and still not work.
How can I fix it?
I have a drop down list in a aspx form which uses C#.
If I do not choose anything and pressed submit button, it throws nullreference exception.
But, I use the following code to check it in if condition and still not work.
How can I fix it?
string a = this.location.SelectedItem.Value;
if (string.IsNullOrEmpty(this.location.SelectedItem.Value) || this.location.SelectedItem.Value == null || this.location.SelectedItem.Value =="")
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Or try this.location.SelectedValu
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