Error: Exception Details: System.ArgumentOutOfRangeException: 'dropdownlist1' has a SelectedValue which is invalid because it does not exist in the list of items. Parameter name: value

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when the database is empty gives this eror when retrieving data from db into dropdownlist.

Exception Details: System.ArgumentOutOfRangeException: 'dropdownlist1' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value

i have tried this one:

if (dt.Rows[rowIndex]["Zone"].ToString() == null || dt.Rows[rowIndex]["Zone"].ToString() == "")

                           dropdownlist1.SelectedValue = null;
                       else
                          dropdownlist1.SelectedValue = dt.Rows[rowIndex]["Zone"].ToString();

BUT the problem is that it takes in this case the first value of the datable, i have bind the dropdownlist...
HOW CAN I LEAVE IT EMPTY WHEN THERE IS NO DATA??

Posted 16-Jan-13 2:55am

lovitaxxxx

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2 solutions

Solution 2

You need to set the option only if there is any record in dropdown. Try:

SQL

if (dt.Rows.Count > 0)
{
  // Your logic regarding data - setting control values , etc
  ...
  ...
  dropdownlist1.SelectedValue = dt.Rows[rowIndex]["Zone"].ToString();
  ...
  ...
}

Posted 16-Jan-13 3:58am

Sandeep Mewara

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grimbeast · Accepted Answer · 2013-01-16T03:00:00

Solution 1

Would it be a solution for you to just add an empty item to the dropdownlist, and then select it?

something like:

C#

dropdownlist1.Items.Insert(0, "");
dropdownlist1.SelectedIndex(0);

Posted 16-Jan-13 3:00am

grimbeast

Updated 16-Jan-13 4:09am

v2