Unable to cast object of type 'System.Data.DataRowView' to type 'System.String'.

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I try to read all the selecteditem from a listbox and save it into a list. But it showing the error "Unable to cast object of type 'System.Data.DataRowView' to type 'System.String'."

C#

List<string> Stringlist = new List<string>() ;

foreach (string selectedItem in ListBox.SelectedItems)
{
      Stringlist .Add(selectedItem);
}

please help, thkz

Posted 1-Jul-13 21:19pm

sandra_tay

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Shibashish_Choudhury · Answer 1 · 2013-07-01T21:34:00

Use this code instead to fetch all the selected values in a particular listbox, say listbox1 :

C#

List<string> Stringlist = new List<string>();
        for (int i = 0; i < ListBox1.Items.Count; i++)
        {
            if (ListBox1.Items[i].Selected == true)
            {
                Stringlist.Add(ListBox1.Items[i].ToString());
            }
        }</string></string>

Listbox.selecteditem is not string so the conversion error was there...
Use the above code and I think you will get the desired result..

Thanks

Richard MacCutchan · Answer 2 · 2013-07-01T21:34:00

Solution 2

Look at the documentation[^], this collection is not a set of strings.

Posted 1-Jul-13 21:34pm

Richard MacCutchan

Richard MacCutchan · Answer 3 · 2013-07-01T21:34:00

Solution 3

Look at the documentation[^], this collection is not a set of strings.

Posted 1-Jul-13 21:34pm

Richard MacCutchan

abhinavpratap · Answer 4 · 2013-07-01T21:34:00

Convert from object to string as

C#

List<string> Stringlist = new List<string>() ;
string strItem =string.Empty;
foreach (object selectedItem in ListBox.SelectedItems)
{
     strItem = selecteditem as String;
      Stringlist .Add(strItem );
}
</string></string>

or check this link

http://stackoverflow.com/questions/1586078/getting-all-selected-values-from-an-asp-listbox[^]

Unable to cast object of type 'System.Data.DataRowView' to type 'System.String'.

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