RadCombo nullReferenceException

[Toni]

Hello,

I have a combobox that takes input for the RadUpload. The combo box loads with -- Select Value-- in it but when no selectin is made i get a NullReferenceException occurred.  at this line.

 
string  DBCreativeName = RCBXCreative.SelectedItem.Value;

so I tried to use an if and try catch to fix this
 
 string DBCreativeName = RCBXCreative.SelectedItem.Value;
 
try
 
{
 
if (Convert.ToBoolean(DBCreativeName = ""))
 
 {

    lblstatupload2.Text = "You need to select a creative";
  }

}
catch (NullReferenceException)
  {

lblstatupload2.Text = " you need to enter a creative";
 }

this didn't work either. Can someone advise me on what is the correct way to fix this.

Thanks,
 Yusef

 

 

[Serrin]

Hello Yusef,

I think the problem comes from trying to set a string to the .Value when .SelectedItem is actually null.  Since there is no selected item, you can't get a value from it.  You can try something like:

string SelectionItem;

if (RadComboBox1.SelectedItem == null)
{
    SelectionItem = "No selection";
}
else
{
    SelectionItem = RadComboBox1.SelectedItem.Value;
}

RadTextBox1.Text = SelectionItem;

Which first tests for whether there is a selected item, if not we return a "No selection" message, if so we return the value.

[Toni]

Thanks that worked.