Hi
I'm trying to implement the Tooltipified RadGrid in my web user control but I got following error; please help me to resolve it.
Error: TestToolTip is currently unavailable.
DotNetNuke.Services.Exceptions.ModuleLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.UI.Modules.ModuleHost.LoadModuleControl() --- End of inner exception stack trace ---
My code snippets:
TestToolTip.ascx
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="TestToolTip.ascx.cs" Inherits="SU_SaleStatisticImport.TestToolTip" %>
<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="Telerik" %>
<%@ Register Src="ActivityDetails.ascx" TagName="ActivityDetails" TagPrefix="uc1" %>
<head id="Head1" runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager runat="server">
</asp:ScriptManager>
<Telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server">
</Telerik:RadAjaxLoadingPanel>
<Telerik:RadToolTipManager ID="RadToolTipManager1" OffsetY="-1" HideEvent="ManualClose"
Width="250" Height="350" runat="server" EnableShadow="true" OnAjaxUpdate="OnAjaxUpdate"
RelativeTo="Element" Position="MiddleRight">
</Telerik:RadToolTipManager>
<Telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
<AjaxSettings>
<Telerik:AjaxSetting AjaxControlID="rgCampaigns">
<UpdatedControls>
<Telerik:AjaxUpdatedControl ControlID="rgCampaigns" LoadingPanelID="RadAjaxLoadingPanel1" />
<Telerik:AjaxUpdatedControl ControlID="RadToolTipManager1" />
</UpdatedControls>
</Telerik:AjaxSetting>
</AjaxSettings>
</Telerik:RadAjaxManager>
<Telerik:RadGrid ID="rgCampaigns" runat="server" OnItemDataBound="rgCampaigns_ItemDataBound"
AutoGenerateColumns="false">
<MasterTableView runat="server" DataKeyNames="GlobalCode">
<Columns>
<Telerik:GridTemplateColumn HeaderText="First">
<ItemTemplate>
<asp:Label ID="lblTitle" runat="server" Text="Show ToolTip"></asp:Label>
</ItemTemplate>
</Telerik:GridTemplateColumn>
<Telerik:GridBoundColumn DataField="SecondColumn" HeaderText="Second">
</Telerik:GridBoundColumn>
</Columns>
</MasterTableView>
</Telerik:RadGrid>
</form>
</body>
</html>
TestToolTip.ascx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Telerik.Web.UI;
using DotNetNuke;
using DotNetNuke.Common.Utilities;
using DotNetNuke.Entities.Modules;
using DotNetNuke.Entities.Modules.Actions;
using DotNetNuke.Entities.Modules.Communications;
using DotNetNuke.Entities.Modules.Definitions;
using DotNetNuke.Security;
using DotNetNuke.Services.Exceptions;
using DotNetNuke.Services.Localization;
using SaleStatisticImport;
namespace SU_SaleStatisticImport
{
public partial class TestToolTip : System.Web.UI.UserControl
{
protected System.Data.DataTable GetData()
{
System.Data.DataTable tbl = new System.Data.DataTable();
tbl.Columns.Add(new System.Data.DataColumn("GlobalCode"));
tbl.Columns.Add(new System.Data.DataColumn("SecondColumn"));
tbl.Columns.Add(new System.Data.DataColumn("ThirdColumn"));
tbl.Columns.Add(new System.Data.DataColumn("FourthColumn"));
tbl.Rows.Add(new object[] { "firstRecord1", "firstRecord2", "firstRecord3", "firstRecord4" });
tbl.Rows.Add(new object[] { "secondRecord1", "secondRecord2", "secondRecord3", "secondRecord4" });
tbl.Rows.Add(new object[] { "thirdRecord1", "thirdRecord2", "thirdRecord3", "thirdRecord4" });
return tbl;
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
rgCampaigns.DataSource = GetData();
rgCampaigns.DataBind();
}
}
protected void OnAjaxUpdate(object sender, ToolTipUpdateEventArgs args)
{
this.UpdateToolTip(args.Value, args.UpdatePanel);
}
private void UpdateToolTip(string ActivityCode, UpdatePanel panel)
{
Control ctrl = Page.LoadControl("~/ActivityDetails.ascx");
panel.ContentTemplateContainer.Controls.Add(ctrl);
ActivityDetails details = (ActivityDetails)ctrl;
details.ActivityCode = ActivityCode;
}
protected void rgCampaigns_ItemDataBound(object sender, Telerik.Web.UI.GridItemEventArgs e)
{
if (e.Item.ItemType == GridItemType.Item || e.Item.ItemType == GridItemType.AlternatingItem)
{
Control target = e.Item.FindControl("lblTitle");
if (!Object.Equals(target, null))
{
if (!Object.Equals(this.RadToolTipManager1, null))
{
//Add the button (target) id to the tooltip manager
this.RadToolTipManager1.TargetControls.Add(target.ClientID, (e.Item as GridDataItem).GetDataKeyValue("GlobalCode").ToString(), true);
}
}
}
}
}
}
ActivityDetails.ascx
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="ActivityDetails.ascx.cs" Inherits="SU_SaleStatisticImport.ActivityDetails" %>
<asp:label id="lbltest" runat="server" text="Label"></asp:label>
ActivityDetails.ascx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using DotNetNuke;
using DotNetNuke.Common.Utilities;
using DotNetNuke.Entities.Modules;
using DotNetNuke.Entities.Modules.Actions;
using DotNetNuke.Security;
using DotNetNuke.Services.Exceptions;
using DotNetNuke.Services.Localization;
using Telerik.Web.UI;
using SaleStatisticImport;
namespace SU_SaleStatisticImport
{
public partial class ActivityDetails : System.Web.UI.UserControl
{
public string ActivityCode
{
get
{
if (ViewState["ActivityCode"] == null)
{
return "";
}
return (string)ViewState["ActivityCode"];
}
set
{
ViewState["ActivityCode"] = value;
}
}
protected void Page_Load(object sender, EventArgs e)
{
lbltest.Text += "<br>Activity code: " + ActivityCode;
}
}
}