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How to Check/Selected Previous Selected Child Nodes

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This is a migrated thread and some comments may be shown as answers.
Venkata
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Venkata asked on 02 Jan 2014, 09:52 PM
Hi,
I have a 2 Level(Parent & Child) Treeview.
and i set Parent Node ExpandMode = TreeNodeExpandMode.ServerSide;

How do we set Checked=true if user has previously selected Child nodes (lets assume i am getting the previous selected values from the Database)


Thank you

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Princy
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answered on 03 Jan 2014, 06:22 AM
Hi,

I guess you want to check the RadTreeView Child nodes based on the values from the database. Please have a look into the following code snippet. 

ASPX:
<telerik:RadTreeView ID="RadTreeView1" runat="server">
</telerik:RadTreeView>

C#:
protected void Page_Load(object sender, EventArgs e)
{
    SqlDataAdapter adapter = new SqlDataAdapter("SELECT * from Details ", ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString);
    DataTable data = new DataTable();
    adapter.Fill(data);
    RadTreeView1.DataSource = data;
    RadTreeNodeBinding binding = new RadTreeNodeBinding();
    binding.CheckedField = "status";
    binding.Checkable = true;
 
    RadTreeView1.DataFieldID = "id";
    RadTreeView1.DataTextField = "text";
    RadTreeView1.DataFieldParentID = "parentid";
 
    RadTreeView1.DataBindings.Add(binding);
    RadTreeView1.CheckBoxes = true;
    RadTreeView1.DataBind();
}

Please provide your code if it doesn't help.
Thanks,
Princy.
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Venkata
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answered on 03 Jan 2014, 03:39 PM
Thanks Princy But your solution doesn't help me

here is my requirement.. User select some parent nodes and some child nodes and save to the database. while Edit we have to show/checked what he was selected previously. 

here is my code:
<telerik:RadTreeView ID="radTree" Height="250px" runat="server" CheckChildNodes="true" Skin="WebBlue" CheckBoxes="true" onnodeexpand="radTree_NodeExpand" >                                  
</telerik:RadTreeView>

private void LoadCompanyList()
{
DataTable DT = GetData();            
radTree.Nodes.Clear();
RadTreeNode nodeCompany = new RadTreeNode();
 
 foreach (DataRow row in DT.Rows)
  {
   nodeCompany = new RadTreeNode(row["CName"].ToString(), row["CID"].ToString());
   radTree.Nodes.Add(nodeCompany);
   nodeCompany.ExpandMode = TreeNodeExpandMode.ServerSide;
   }
}

protected void radTree_NodeExpand(object sender, RadTreeNodeEventArgs e)
        {
            DataTable dtUsers = LoadUsers(Convert.ToInt32(e.Node.Value));
            foreach (DataRow row in dtUsers.Rows)
            {
                RadTreeNode treeUsers = new RadTreeNode(row["UName"].ToString(), row["UID"].ToString());                
                e.Node.Nodes.Add(treeUsers);
            }           
        }

//while Editing we have to check/selected previous selected Company
private void LoadPreviousSelectedCompanyList()
        {
            string[] objSelectedCompany = getDataFrom Database();

            foreach (string strCompany in objSelectedCompany)
            {
                RadTreeNode foundNode = radTree.FindNodeByValue(strCompany);
                if (foundNode != null)                                
                    foundNode.Checked = true;                
            }    
        }

But how do we set Previous Selected Userlist(Because until click on Node Expand we are not loading the Userlist)?
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Plamen
Telerik team
answered on 08 Jan 2014, 02:50 PM
Hi Venkata,

You should set the checked property of the treeUsers node in NodeExpand event to true in case the node should be checked after populating.

Hope this will help you solve the issue.

Regards,
Plamen
Telerik
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Venkata
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Answers by
Princy
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Venkata
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Plamen
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