multiple selection listbox--edit mode

My code---on Done btn--
listLeave.SelectionMode = ListSelectionMode.Multiple;
for (int i = 1; i < listLeave.Items.Count; i++)
{
if (listLeave.Items[i].Selected)
{
j = "";
j = listLeave.Items[i].Value;
if (j == "(select)")
{
iDeptFlag = 1;
}
}
}
if (iDeptFlag == 1)
{
lblResultMessage.Text = "";
lblResultMessage.Text = "Please select proper value.";
lblResultMessage.ForeColor = System.Drawing.Color.Red;
return;
}

else
{
int i;
txtTypeOfLeave.Text = "" + " ";
for (i = 0; i < listLeave.Items.Count; i++)
{
if (listLeave.Items[i].Selected)
{
txtTypeOfLeave.Text = txtTypeOfLeave.Text + listLeave.Items[i].Value + "" + ",";

}

}
if (txtTypeOfLeave.Text.Length > 0)
{
txtTypeOfLeave.Text = txtTypeOfLeave.Text.Remove(txtTypeOfLeave.Text.LastIndexOf(","), 1);
}
}

}

and on gridview_rowediting event

int index = e.NewEditIndex;
txtTypeOfLeave.Text = grdvEarningHead.Rows[index].Cells[6].Text;
string[] ar = txtTypeOfLeave.Text.Split(',');
string[] text = new string[10];
int v = 0;
for (int j = 0; j < ar.Length; j++)
{
for(int k = 0 ; k < listLeave.Items.Count ; k++)
{
if (ar[j] == listLeave.Items[k].Value)
{
text[v] = listLeave.Items[k].Text;
v++;
//listLeave.Items[k].Selected = true;
}
}
}

int count = 0;
foreach (string value in text)
if (value !=null ) ++count;



for (int i = 0; i < count; i++)
{
for (int k = 0; k < listLeave.Items.Count; k++)
{
if (text[i].ToString () == listLeave.Items[k].Text.ToString () )
{

listLeave.SelectedItem.Text = text[i];
}
}
}


this is my code pls help me its not run.
thanks