Fix Error: Only one instance of a ScriptManager can be added to the page


Use a ScriptManagerProxy on your child pages/user controls


http://msdn.microsoft.com/en-us/library/system.web.ui.scriptmanagerproxy(v=vs.110).aspx

If your code like this
  
<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
</asp:ToolkitScriptManager>

<!-- <asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>-->
 
Problem Solution

ASP.NET ignores HTML comments just like it ignores all tags without a runat="server" on them or that don't start with <%. So, Use below code for comment

<%-- <asp:ScriptManager ID="ScriptManager1" runat="server"> 
</asp:ScriptManager> --%>

Comments

Unknown said…
Thanks for sharing.. very helpful in solving problems my asp.net website..
January 26, 2014 at 8:34 PM
Post a Comment

Popular posts from this blog

Delete Confirmation for Delete ButtonField, TemplateField and CommandField in a GridView in ASP.NET

Introduction: This article explains how to add delete confirmation for ButtonField, CommandField and TemplateField columns in a GridView. In this example, I am using a GridView and delete buttons to just hide the row to keep the demo simple. Markup: < html   xmlns = "http://www.w3.org/1999/xhtml" > < head   runat = "server" >      < title ></ title > </ head > < body >      < form   id = "form1"   runat = "server" >      < asp : GridView   ID = "GridView1"   runat = "server"   Font-Names = "Tahoma"   Font-Size = "Small"          CellPadding = "4"   BorderColor = "#507CD1"   BorderStyle = "Solid"   AutoGenerateColumns = "false"          ForeColor = "#333333"   GridLines = "None"   OnRowDataBound = "GridView1_RowDataBou...
Read more

Selecting/Deselecting all CheckBoxes inside a ListView In ASP.NET

Introduction: This articles shows how to toggle checkboxes selection in a ListView using Javascript. Example in this article shows a ListView populated with random records with SelectAll functionality Background:   Often we are required to make one or multiple selection when different options are presented in a databound control such as GridView, Repeater, ListView so on. It is cumbersome to deselect each item individually when the selection has to be cleared. ListView Header can contain a checkbox to select/deselect items in all items of the ListView. Markup:    < html   xmlns = "http://www.w3.org/1999/xhtml" > < head   id = "Head1"   runat = "server" >      < title ></ title >      < script   type = "text/javascript" >          function  toggleCheckBoxes(source) {       ...
Read more

How to Create 3 Tier Vb.Net Desktop Application

3 Tiers are  DLL (Data Logic Layer) BLL (Business Logic Layer ) UI/UX (User Interface) DLL Code DataAccess.vb Code #Region "Data Access <<Imported NameSpaces>>" Imports System.Data.Odbc Imports System.Data.SqlClient Imports System.Data.OleDb Imports System.Xml Imports System.Data.Common Imports System.Text Imports System.Configuration #End Region #Region "Data Access <<Namespace, Class, Functions, Proeprties, etc.>>" Namespace Kcon.Practices.PrivateLibrary.DataLib     Public Class DataAccess #Region "Private Variables"         Private databaseProviderFactory As DbProviderFactory         Private databaseConnection As DbConnection         Private connectionString As String         Private providerName As String         Private databaseTransact...
Read more