
Hello,
I have a web application that uses RadTreeView control for displaying data. When displaying large amount of data, it throws following error:
"Error during serialization or deserialization using the JSON JavaScriptSerializer. The length of the string exceeds the value set on the maxJsonLength property."
I have tried changing "maxJsonLength" property to value 2147483646 in web.config of the application. But still above error appears.
Please help.
Detailed error is as follows:
Timestamp: 7/13/2012 2:14:51 PM$$$Message: <?xml version="1.0" encoding="utf-16"?><error><message>Error during serialization or deserialization using the JSON JavaScriptSerializer. The length of the string exceeds the value set on the maxJsonLength property.</message><stackTrace> at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, StringBuilder output, SerializationFormat serializationFormat) at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, SerializationFormat serializationFormat) at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) at System.Web.Script.Serialization.JavaScriptSerializer.SerializeEnumerable(IEnumerable enumerable, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat) at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, StringBuilder output, SerializationFormat serializationFormat) at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, SerializationFormat serializationFormat) at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj) at Telerik.Web.UI.RadTreeView.DescribeComponent(ScriptComponentDescriptor descriptor) at Telerik.Web.UI.RadDataBoundControl.Telerik.Web.IControl.DescribeComponent(ScriptComponentDescriptor descriptor) at Telerik.Web.UI.ScriptRegistrar.GetScriptDescriptors(Control control) at Telerik.Web.UI.RadDataBoundControl.GetScriptDescriptors() at Telerik.Web.UI.RadDataBoundControl.System.Web.UI.IScriptControl.GetScriptDescriptors() at System.Web.UI.ScriptControlManager.RegisterScriptDescriptors(IScriptControl scriptControl) at System.Web.UI.ScriptManager.RegisterScriptDescriptors(IScriptControl scriptControl) at Telerik.Web.UI.RadDataBoundControl.RegisterScriptDescriptors() at Telerik.Web.UI.RadDataBoundControl.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Control.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.UpdatePanel.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Control.Render(HtmlTextWriter writer) at System.Web.UI.UpdatePanel.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Control.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer) at Telerik.Web.UI.RadMultiPage.RenderContents(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) at Telerik.Web.UI.RadMultiPage.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Control.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.UpdatePanel.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Control.Render(HtmlTextWriter writer) at System.Web.UI.UpdatePanel.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Control.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) at System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) at System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) at ASP.master_master.__RenderMasterBody(HtmlTextWriter __w, Control parameterContainer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Control.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Page.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)</stackTrace></error>
Thanks,
Neha

</script> <script type="text/javascript" id="telerikClientEvents2">//<![CDATA[ function RadMenu1_MouseOut(sender, args) { document.getElementById(sender.get_id()).style.zIndex = -1; }//]]> </script>I have followed the code provided in the self-referencing hierarchy demo (http://demos.telerik.com/aspnet-ajax/grid/examples/hierarchy/selfreferencing/defaultcs.aspx) exactly, but I am having trouble with the columns in nested details table not lining correctly.
My radgrid looks like this
<style type="text/css"> .RadGrid td { padding: 0; } </style> <telerik:RadGrid ID="rgTasks" runat="server" OnNeedDataSource="rgTasks_NeedDataSource" Skin="Hay" OnColumnCreated="RadGrid1_ColumnCreated" OnItemCreated="RadGrid1_ItemCreated" OnItemDataBound="RadGrid1_ItemDataBound"> <MasterTableView CommandItemDisplay="None" DataKeyNames="TASK_UID, TASK_PARENT_UID" HierarchyDefaultExpanded="true" HierarchyLoadMode="Client"> <SelfHierarchySettings ParentKeyName="TASK_PARENT_UID" KeyName="TASK_UID" /> <NoRecordsTemplate></NoRecordsTemplate> </MasterTableView> <ClientSettings AllowExpandCollapse="true" /> </telerik:RadGrid>protected void Page_Load(object sender, EventArgs e) { rgTasks.MasterTableView.FilterExpression = "TASK_PARENT_UID IS NULL"; } protected void RadGrid1_ColumnCreated(object sender, GridColumnCreatedEventArgs e) { if (e.Column is GridExpandColumn) { e.Column.Visible = false; } else if (e.Column is GridBoundColumn) { e.Column.HeaderStyle.Width = Unit.Pixel(100); e.Column.ItemStyle.Wrap = false; } } public void Page_PreRender(object sender, EventArgs e) { HideExpandColumnRecursive(rgTasks.MasterTableView); } public void HideExpandColumnRecursive(GridTableView tableView) { GridItem[] nestedViewItems = tableView.GetItems(GridItemType.NestedView); foreach (GridNestedViewItem nestedViewItem in nestedViewItems) { foreach (GridTableView nestedView in nestedViewItem.NestedTableViews) { nestedView.Style["border"] = "0"; Button MyExpandCollapseButton = (Button)nestedView.ParentItem.FindControl("MyExpandCollapseButton"); if (nestedView.Items.Count == 0) { if (MyExpandCollapseButton != null) { MyExpandCollapseButton.Style["visibility"] = "hidden"; } nestedViewItem.Visible = false; } else { if (MyExpandCollapseButton != null) { MyExpandCollapseButton.Style.Remove("visibility"); } } if (nestedView.HasDetailTables) { HideExpandColumnRecursive(nestedView); } } } } protected void RadGrid1_ItemCreated(object sender, GridItemEventArgs e) { CreateExpandCollapseButton(e.Item, "TASK_UID"); if (e.Item is GridHeaderItem && e.Item.OwnerTableView != rgTasks.MasterTableView) { e.Item.Style["display"] = "none"; } if (e.Item is GridNestedViewItem) { e.Item.Cells[0].Visible = false; } } protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e) { CreateExpandCollapseButton(e.Item, "TASK_UID"); } public void CreateExpandCollapseButton(GridItem item, string columnUniqueName) { if (item is GridDataItem) { if (item.FindControl("MyExpandCollapseButton") == null) { Button button = new Button(); button.Click += new EventHandler(button_Click); button.CommandName = "ExpandCollapse"; button.CssClass = (item.Expanded) ? "rgCollapse" : "rgExpand"; button.ID = "MyExpandCollapseButton"; if (item.OwnerTableView.HierarchyLoadMode == GridChildLoadMode.Client) { string script = String.Format(@"$find(""{0}"")._toggleExpand(this, event); return false;", item.Parent.Parent.ClientID); button.OnClientClick = script; } int level = item.ItemIndexHierarchical.Split(':').Length - 1; button.Style["margin-left"] = level * 15 + "px"; TableCell cell = ((GridDataItem)item)[columnUniqueName]; cell.Controls.Add(button); cell.Controls.Add(new LiteralControl(" ")); cell.Controls.Add(new LiteralControl(((GridDataItem)item).GetDataKeyValue(columnUniqueName).ToString())); } } } void button_Click(object sender, EventArgs e) { ((Button)sender).CssClass = (((Button)sender).CssClass == "rgExpand") ? "rgCollapse" : "rgExpand"; }