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POHow to maintain the tree view user interactions through post back?
 

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  1. POHow to maintain the tree view user interactions through post back?
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    <p>I use <code>RadTreeView</code> in my master page :</p> <p>but i face the following problem :</p> <p>I lose my selections when i click on the nodes of the tree view .and every time i click on the node it makes <code>(Response.Redirect("..."))</code> which make the master entering the <code>(!Page.IsPostback)</code> every time and bind the tree view again so i lose my selections .</p> <p>How to fix this problem .</p> <p><strong>My .aspx :</strong></p> <pre><code> &lt;telerik:RadTreeView ID="rtv_cm" runat="server" OnNodeExpand="rtv_cm_NodeExpand" OnNodeClick="rtv_cm_NodeClick" Skin="WebBlue"&gt; &lt;/telerik:RadTreeView&gt; </code></pre> <hr> <p><strong>My .cs :</strong></p> <pre><code> protected void Page_Load(object sender, EventArgs e) { if (Session["emp_num"] != null &amp;&amp; !string.IsNullOrEmpty(Session["emp_num"].ToString())) { if (!Page.IsPostBack) { LoadRootNodes(rtv_cm, TreeNodeExpandMode.ServerSide); } } else { Response.Redirect("Frm_login.aspx"); } } </code></pre> <hr> <pre><code>protected void rtv_cm_NodeClick(object sender, RadTreeNodeEventArgs e) { dt_childs = (DataTable)Session["dt_childs"]; IEnumerable&lt;DataRow&gt; result = from myRow in dt_childs.AsEnumerable() where myRow.Field&lt;string&gt;("task_id").TrimEnd() == e.Node.Value.TrimEnd() select myRow; if (result != null) { if (!string.IsNullOrEmpty(result.ElementAtOrDefault(0).Field&lt;string&gt;("page_name"))) { Response.Redirect(result.ElementAtOrDefault(0).Field&lt;string&gt;("page_name").TrimEnd(), false); } } } </code></pre> <hr> <p><strong>How I get The menu :</strong></p> <pre><code> private void LoadRootNodes(RadTreeView treeView, TreeNodeExpandMode expandMode) { dt = Menu_db.GetMenu(Session["emp_num"].ToString(), CMSession.Current.db_code); IEnumerable&lt;DataRow&gt; result = from myRow in dt.AsEnumerable() where myRow.Field&lt;string&gt;("task_id").TrimEnd() == "0" select myRow; if (result != null &amp;&amp; result.Count()&gt;0) { DataTable dt_roots = result.CopyToDataTable&lt;DataRow&gt;(); Session["dt"] = dt; Session["dt_roots"] = dt_roots; foreach (DataRow row in dt_roots.Rows) { RadTreeNode node = new RadTreeNode(); node.Text = row["task_name"].ToString().TrimEnd(); node.Value = row["task_id"].ToString().TrimEnd(); if (Convert.ToInt32(row["count"]) &gt; 0) { node.ExpandMode = expandMode; } treeView.Nodes.Add(node); } } } </code></pre>
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      1. POHow to maintain the tree view user interactions through post back?
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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