Dynamically create treeview

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I want to display a hierarchical structure, i want retrrive the treeview this structure in vb.net using asp.net

__ID__  | __NAME__  | __PARENT__|
 1      | Patrick   | primary
 2      | Mark      | primary
 3      | Scott     | Mark
 4      | Jason     | Patrick
 5      | Julian    | Primary
 6      | John      | Scott
 7      | Steve     | Scott
 8      | George    | Patrick
 9      | Robert    | George
 10     | Rodney    | George

[edit]SHOUTING removed, Code block added - OriginalGriff[/edit]

Posted 25-Nov-13 23:46pm

saifudheen kt

Updated 25-Nov-13 23:53pm

OriginalGriff

v3

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OriginalGriff 26-Nov-13 5:53am

DON'T SHOUT. Using all capitals is considered shouting on the internet, and rude (using all lower case is considered childish). Use proper capitalisation if you want to be taken seriously.

OriginalGriff 26-Nov-13 5:53am

And what have you done so far?
If you are waiting for permission, consider it given...

Vinodh.B 26-Nov-13 5:54am

Don't create duplicate questions. You had already posted this question earlier

3 solutions

Solution 1

Have a look here: Walkthrough: Displaying Hierarchical Data in a TreeView Control[^]

Posted 26-Nov-13 0:12am

Maciej Los

Solution 2

See !
did the code for it

private void BindTreeViewControl()
   {
       try
       {
           DataTable dt = new DataTable();
           dt.Columns.Add("ID", typeof(int));
           dt.Columns.Add("NAME", typeof(string));
           dt.Columns.Add("PARENT", typeof(string));
           dt.Rows.Add(1, "Patrick ", "primary");
           dt.Rows.Add(2, "Mark", "primary");
           dt.Rows.Add(3, "Scott", "Mark");
           dt.Rows.Add(4, "Jason", "Patrick");
           dt.Rows.Add(5, "Julian", "Primary");
           dt.Rows.Add(6, "John", "Scott");
           dt.Rows.Add(7, " Steve", "Scott");
           dt.Rows.Add(8, " George", "Patrick");
           dt.Rows.Add(9, "Robert", "George");
           dt.Rows.Add(10, "Rodney", "George");
           // DataRow[] Rows = dt.Select("ParentId IS NULL"); Get all parents nodes
           DataTable dtParent = (from f in dt.AsEnumerable()
                                 where f.Field<string>("PARENT").ToLower() == "primary"
                                 select f).ToList().CopyToDataTable();
           for (int i = 0; i < dtParent.Rows.Count; i++)
           {
               TreeNode root = new TreeNode(dtParent.Rows[i]["NAME"].ToString(), dtParent.Rows[i]["ID"].ToString());
               root.SelectAction = TreeNodeSelectAction.Expand;
               CreateNode(root, dt);//Sending table
               TreeView1.Nodes.Add(root);
           }
       }
       catch (Exception Ex) { throw Ex; }
   }
   public void CreateNode(TreeNode node, DataTable Dt)
   {
       DataTable dtChild = new DataTable();
       var varChiled = (from f in Dt.AsEnumerable()
                             where f.Field<string>("PARENT").ToLower() == node.Text.ToLower()
                             select f).ToList();
       if (varChiled.Count > 0) dtChild = varChiled.CopyToDataTable();
       if (dtChild.Rows.Count == 0) { return; }
       for (int i = 0; i < dtChild.Rows.Count; i++)
       {
           TreeNode Childnode = new TreeNode(dtChild.Rows[i]["NAME"].ToString(), dtChild.Rows[i]["ID"].ToString());
           Childnode.SelectAction = TreeNodeSelectAction.Expand;
           node.ChildNodes.Add(Childnode);
           CreateNode(Childnode, Dt);
       }
   }

Posted 26-Nov-13 0:24am

sankarsan parida

Comments

saifudheen kt 26-Nov-13 7:37am

this values are sql Table,i am using vb.net in asp.net

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sankarsan parida · Accepted Answer · 2013-11-26T01:44:00

See in VB

Private Sub BindTreeViewControl()
	Try
		Dim dt As New DataTable() 
		'Assign your database value to dt table  where dt is null now
		Dim dtParent As DataTable = (From f In dt.AsEnumerable() Where f.Field(Of String)("PARENT").ToLower() = "primary"f).ToList().CopyToDataTable()
		For i As Integer = 0 To dtParent.Rows.Count - 1
			Dim root As New TreeNode(dtParent.Rows(i)("NAME").ToString(), dtParent.Rows(i)("ID").ToString())
			root.SelectAction = TreeNodeSelectAction.Expand
			CreateNode(root, dt)
			'Sending table
			TreeView1.Nodes.Add(root)
		Next
	Catch Ex As Exception
		Throw Ex
	End Try
End Sub


Public Sub CreateNode(node As TreeNode, Dt As DataTable)
	Dim dtChild As New DataTable()
	Dim varChiled = (From f In Dt.AsEnumerable() Where f.Field(Of String)("PARENT").ToLower() = node.Text.ToLower()f).ToList()
	If varChiled.Count > 0 Then
		dtChild = varChiled.CopyToDataTable()
	End If
	If dtChild.Rows.Count = 0 Then
		Return
	End If
	For i As Integer = 0 To dtChild.Rows.Count - 1
		Dim Childnode As New TreeNode(dtChild.Rows(i)("NAME").ToString(), dtChild.Rows(i)("ID").ToString())
		Childnode.SelectAction = TreeNodeSelectAction.Expand
		node.ChildNodes.Add(Childnode)
		CreateNode(Childnode, Dt)
	Next
End Sub