List that this enumerator is bound to has been modified. An enumerator can only be used if the list does not change.

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i trying to find values in listbox and highlight that according to textbox value but i am getting this error. I googled but failed to find my answer pls. Help....

Thank You..

to load values in listbox

C#

private void FilterListBox_Load(object sender, EventArgs e)
        {
            SqlConnection cn = new SqlConnection("Data Source=SRISTI;Initial Catalog=Anjanee;Integrated Security=True");
            SqlDataAdapter da = new SqlDataAdapter("select UserName from User_Name", cn);
            DataSet ds = new DataSet();
            da.Fill(ds, "ABC");
            int count = ds.Tables[0].Rows.Count;
            for (int i = 0; i < count; i++)
            {
                listBox1.Items.Add(ds.Tables[0].Rows[i]["UserName"].ToString());
            }
        }

C#

private void textBox1_TextChanged(object sender, EventArgs e)
        {
            foreach (string s in listBox1.Items)
            {
                if (s.StartsWith(textBox1.Text) == true)
                {
                    listBox1.SelectedItem = s;
                }
            }
        }

Posted 20-Jun-13 20:46pm

Anjanee Kumar Singh

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Jameel VM 21-Jun-13 2:53am

where is the problem?

Anjanee Kumar Singh 21-Jun-13 2:54am

The Above heading is error

Jameel VM 21-Jun-13 2:59am

i mean which line?

Anjanee Kumar Singh 21-Jun-13 3:00am

string s after second round

3 solutions

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Rajesh Anuhya · Accepted Answer · 2013-06-20T20:54:00

Solution 1

As per my understand you are trying to do the Autocomeplete extender in window application.
Go through the below link for sample program
http://www.mstecharticles.com/2010/12/auto-complete-text-box.html[^]

Thanks
--RA

Posted 20-Jun-13 20:54pm

Rajesh Anuhya

CPallini · Accepted Answer · 2013-06-20T20:59:00

You might change from:

Quote:
foreach (string s in listBox1.Items)
{
if (s.StartsWith(textBox1.Text) == true)
{
listBox1.SelectedItem = s;
}
}

to

C#

for(int i=0; i<listbox1.items;>  {
  if (listBox1.items[i].StartsWith(textBox1.Text) == true)
  {
     listBox1.SelectedIndex = i;
  }
}

Jameel VM · Accepted Answer · 2013-06-20T21:04:00

Solution 4

Try this example from MSDN.

http://msdn.microsoft.com/en-us/library/system.windows.forms.listbox.setselected.aspx[^]

Hope this helps

Posted 20-Jun-13 21:04pm

Jameel VM

Comments

Anjanee Kumar Singh 21-Jun-13 3:18am

Thanks to all I found my Mistake through you people's Link.....and replies..

Thank You...