C#

Udayaraju wrote:

Itz very urgent for me

/* Assumes
TreeView treeView1. Parent node must have Tag "Parent" and
exactly two child nodes for drag to work
ListView listView1 with three columns already added.

Events subscribed
treeView1.ItemDrag += new ItemDragEventHandler(treeView1_ItemDrag);
listView1.DragOver += new DragEventHandler(listView1_DragOver);
listView1.DragDrop += new DragEventHandler(listView1_DragDrop);
*/
void treeView1_ItemDrag(object sender, ItemDragEventArgs e)
{
    TreeNode nodeData = (TreeNode)e.Item;
    // set as selected
    treeView1.SelectedNode = nodeData;
    // check is parent using tag property
    if ((string)nodeData.Tag == "Parent" && nodeData.Nodes.Count == 2)
        // OK
        treeView1.DoDragDrop(nodeData, DragDropEffects.Copy);
}
void listView1_DragOver(object sender, DragEventArgs e)
{
    // default to none
    e.Effect = DragDropEffects.None;
    // get tree node
    TreeNode nodeData = (TreeNode)e.Data.GetData(typeof(TreeNode));
    // check data in case coming from elsewhere
    if (nodeData != null && (string)nodeData.Tag == "Parent" && nodeData.Nodes.Count == 2)
        // OK so proceed
        e.Effect = DragDropEffects.Copy;

}
void listView1_DragDrop(object sender, DragEventArgs e)
{
    // get tree node
    TreeNode nodeData = (TreeNode)e.Data.GetData(typeof(TreeNode));
    // check data
    if (nodeData != null && (string)nodeData.Tag == "Parent" && nodeData.Nodes.Count == 2)
    {
        // convert
        ListViewItem newItem = new ListViewItem(nodeData.Text);
        foreach (TreeNode childNode in nodeData.Nodes)
        {
            ListViewItem.ListViewSubItem newSub = new ListViewItem.ListViewSubItem();
            newSub.Text = childNode.Text;
            // add children to parent
            newItem.SubItems.Add(newSub);
        }
        // add parent
        listView1.Items.Add(newItem);
    }
}