Problem with sort nodes

[Salman]

Hi
I have a treeview which bind to a Datatable  which is code in the follow

private void fillContractItem()

{

trvContractItem.DataFieldID = "iNumber";

trvContractItem.DataFieldParentID = "iParentNumber";
trvContractItem.DataTextField = "strName";
trvContractItem.DataValueField = "iNumber";
 trvContractItem.DataSource = objContractItem.SelectAll();
trvContractItem.DataBind();

}

I want node sort by a filed(name filed is orderfiled in in datatable
how i can move  nodes to up or down in a level  then save order nodes in orderfiled and load nodes by orderfiled and show to users
thanks 

[Plamen]

Hi Salman,

 
You can sort the tree in the code behind as shown in the code:

protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            BindToDataSet(RadTreeView1);

        }
    }
    private static void BindToDataSet(RadTreeView treeView)
    {
        SqlDataAdapter adapter = new SqlDataAdapter("SELECT * FROM Employees",
                ConfigurationManager.ConnectionStrings["TelerikVSXConnectionString"].ConnectionString);

        DataSet links = new DataSet();

        adapter.Fill(links, "Employees");
        DataView view = links.Tables["Employees"].DefaultView;
        // To sort in ascending order:

       // view.Sort = "LastName" + " ASC";
        // To sort in descending order:
        view.Sort = "LastName" + " DESC";

        treeView.DataTextField = "LastName";
        treeView.DataFieldID = "EmployeeID";
        treeView.DataFieldParentID = "ReportsTo";

        treeView.DataSource = view;
        treeView.DataBind();
    }

Please find attached a sample project.

Hope this will be helpful.

All the best,
Plamen Zdravkov
the Telerik team