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try
{
this.TreeView1.Nodes.Clear();
this.TreeView1.BeginUpdate();
SqlDataReader dr = mySUserGroup.GetSelectUserGroup();
while (dr.Read() && dr[1] != null)
{
TreeNode node = new TreeNode();
node.Text = dr[1].ToString();
int stGroupID = (int)dr[0];
string stKey="A"+stGroupID.ToString() ;
node.ImageIndex = 0;
node.Tag = stKey;
TreeView1.Nodes.Add(node);
SqlDataReader dr1 = mySUser.GetSelectUser(stGroupID);
while (dr1.Read() && dr1[1] != null)
{
TreeNode node1 = new TreeNode();
node1.Text = "[" + dr1[1].ToString() + "]--" + dr1[2].ToString();
node1.ImageIndex = 1;
node1.Tag = dr1[1];
node.Nodes.Add(node1);
}
}
this.TreeView1.ExpandAll();
this.TreeView1.Refresh();
this.TreeView1.EndUpdate();
}
catch
{ }