Asp.net Treeview ChildNodes.

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here i have this code where i want to delete all the entries from database which are unchecked in the treeview checkbox. i am able to reach only till the parent nodes.my code doesnt reach till childnodes. kindly help.

p.s. i dont want to delete the nodes, i just want to find out which nodes are unchecked on button_click event and delete the values of those nodes in the database.
thanks

foreach (TreeNode tn in this.TreeView1.Nodes)
{
int strTreeValue = Convert.ToInt32(tn.Value);
if (tn.Checked == false)
{
SqlCommand com = new SqlCommand("Delete From Role_Menu Where Menu_id=" + strTreeValue, con);
com.ExecuteNonQuery();
}
if (tn.ChildNodes.Count > 0)
{
foreach (TreeNode Ctn in TreeView1.Nodes)
{
SqlCommand com = new SqlCommand("Delete From Role_Menu Where Menu_id=" + strTreeValue, con);
com.ExecuteNonQuery();
}
}
}

Posted 14-Mar-13 18:45pm

avinash_thakur86

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3 solutions

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avinash_thakur86 · Answer 1 · 2013-03-14T19:09:00

Solution 3

i want to delete the database entries of all unchecked nodes including parent and child nodes.

Posted 14-Mar-13 19:09pm

avinash_thakur86

Osama Bin Laden 2012 · Answer 2 · 2013-03-14T19:06:00

Solution 2

You want to delete unchecked nodes . is it?

Posted 14-Mar-13 19:06pm

Osama Bin Laden　2012

csharpbd · Answer 3 · 2013-03-14T18:58:00

I think you make a simple mistake. You need to find Child Nodes so your loop must be go through the "tn.ChildNodes". see below code block...
Your code:

C#

if (tn.ChildNodes.Count > 0)
{
    foreach (TreeNode Ctn in TreeView1.Nodes)
    {
        SqlCommand com = new SqlCommand("Delete From Role_Menu Where Menu_id=" + strTreeValue, con);
        com.ExecuteNonQuery();
    }
}

Change Code:

C#

if (tn.ChildNodes.Count > 0)
{
    foreach (TreeNode Ctn in tn.ChildNodes)
    {
        SqlCommand com = new SqlCommand("Delete From Role_Menu Where Menu_id=" + strTreeValue, con);
        com.ExecuteNonQuery();
    }
}

Try this maybe it's help you.