what is the correct configuration of RadAjaxManager - this issue is in ralationship with UpdatePanel !
-
01-10-2019 - |
Question
At first look at the below aspx:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm4.aspx.cs" Inherits="Amlak.WebForm4" %>
<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<div>
<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
<AjaxSettings>
<telerik:AjaxSetting AjaxControlID="RadComboBox1">
<UpdatedControls>
<telerik:AjaxUpdatedControl ControlID="CheckBox1" UpdatePanelRenderMode="Inline" />
</UpdatedControls>
</telerik:AjaxSetting>
</AjaxSettings>
</telerik:RadAjaxManager>
<telerik:RadComboBox ID="RadComboBox1" runat="server" AutoPostBack="True" AppendDataBoundItems="True"
OnSelectedIndexChanged="RadComboBox1_SelectedIndexChanged">
<Items>
<telerik:RadComboBoxItem runat="server" Text="1" Value="1" />
<telerik:RadComboBoxItem runat="server" Text="2" Value="2" />
<telerik:RadComboBoxItem runat="server" Text="3" Value="3" />
<telerik:RadComboBoxItem runat="server" Text="4" Value="4" />
</Items>
</telerik:RadComboBox>
<br />
<br />
<asp:CheckBox ID="CheckBox1" runat="server" AutoPostBack="True" OnCheckedChanged="CheckBox1_CheckedChanged"
Text="Check Me" TextAlign="Left" />
<br />
<br />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</div>
</form>
</body>
</html>
My code behind is like this:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace Amlak
{
public partial class WebForm4 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void RadComboBox1_SelectedIndexChanged(object sender, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e)
{
if (RadComboBox1.SelectedItem.Value == "2")
{
CheckBox1.Checked = true;
}
else
{
CheckBox1.Checked = false;
}
}
protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
{
if (CheckBox1.Checked)
{
TextBox1.Text = "text";
}
else
{
TextBox1.Text = "";
}
}
}
}
My goals:
I want to force
RadComboBox1
to work in AJAX mode and change the CheckBox1.Checked by defined conditions in code behind. -> do not want postback for this.I want to force
CheckBox1
to work in PostBack mode and change theTextBox1.text
by defined conditions in code behind. -> I want postback for this.
In this scenario -> RadComboBox1
works fine
but I don't know why OnCheckedChanged="CheckBox1_CheckedChanged"
does not fire when we change check of CheckBox1
! (because we added it as update of RadComboBox1
In RadAjaxManager1
).
My questions:
Should I add RadComboBox1
as update Of RadComboBox1
or not? However it works fine without adding this.
If we add ChechBox1
To RadAjaxManager1
like below:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm4.aspx.cs" Inherits="Amlak.WebForm4" %>
<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<div>
<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
<AjaxSettings>
<telerik:AjaxSetting AjaxControlID="RadComboBox1">
<UpdatedControls>
<telerik:AjaxUpdatedControl ControlID="CheckBox1" UpdatePanelRenderMode="Inline" />
</UpdatedControls>
</telerik:AjaxSetting>
<telerik:AjaxSetting AjaxControlID="CheckBox1">
<UpdatedControls>
<telerik:AjaxUpdatedControl ControlID="TextBox1" />
</UpdatedControls>
</telerik:AjaxSetting>
</AjaxSettings>
</telerik:RadAjaxManager>
<telerik:RadComboBox ID="RadComboBox1" runat="server" AutoPostBack="True" AppendDataBoundItems="True"
OnSelectedIndexChanged="RadComboBox1_SelectedIndexChanged">
<Items>
<telerik:RadComboBoxItem runat="server" Text="1" Value="1" />
<telerik:RadComboBoxItem runat="server" Text="2" Value="2" />
<telerik:RadComboBoxItem runat="server" Text="3" Value="3" />
<telerik:RadComboBoxItem runat="server" Text="4" Value="4" />
</Items>
</telerik:RadComboBox>
<br />
<br />
<asp:CheckBox ID="CheckBox1" runat="server" AutoPostBack="True" OnCheckedChanged="CheckBox1_CheckedChanged"
Text="Check Me" TextAlign="Left" />
<br />
<br />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</div>
</form>
</body>
</html>
So it works fine in AJAX mode, but I want to force CheckBox1
to work in PostBack!
How can I fix this issue?
Should I add TextBox1
as update of RadComboBox1
in RadAjaxManager
or not?
Thanks for attention to my question. best regards
Solution 2
You can take advantage of the OnRequestStart even of the RadAjaxManager to disable Ajax functionality for specific requests. Here's an updated version of your code that works as you requested:
<div>
<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
<AjaxSettings>
<telerik:AjaxSetting AjaxControlID="RadComboBox1">
<UpdatedControls>
<telerik:AjaxUpdatedControl
ControlID="CheckBox1"
UpdatePanelRenderMode="Inline" />
<telerik:AjaxUpdatedControl
ControlID="TextBox1"
UpdatePanelRenderMode="Inline" />
</UpdatedControls>
</telerik:AjaxSetting>
<telerik:AjaxSetting AjaxControlID="CheckBox1">
<UpdatedControls>
<telerik:AjaxUpdatedControl
ControlID="TextBox1"
UpdatePanelRenderMode="Inline" />
</UpdatedControls>
</telerik:AjaxSetting>
</AjaxSettings>
<ClientEvents OnRequestStart="onAjaxRequestStart" />
</telerik:RadAjaxManager>
<telerik:RadComboBox ID="RadComboBox1" runat="server"
AutoPostBack="True"
AppendDataBoundItems="True"
OnSelectedIndexChanged="RadComboBox1_SelectedIndexChanged">
<Items>
<telerik:RadComboBoxItem runat="server" Text="1" Value="1" />
<telerik:RadComboBoxItem runat="server" Text="2" Value="2" />
<telerik:RadComboBoxItem runat="server" Text="3" Value="3" />
<telerik:RadComboBoxItem runat="server" Text="4" Value="4" />
</Items>
</telerik:RadComboBox>
<br />
<br />
<asp:CheckBox ID="CheckBox1" runat="server"
AutoPostBack="True"
OnCheckedChanged="CheckBox1_CheckedChanged"
Text="Check Me"
TextAlign="Left" />
<br />
<br />
<asp:TextBox ID="TextBox1" runat="server" />
<telerik:RadCodeBlock runat="server">
<script type="text/javascript">
function onAjaxRequestStart(s, e) {
var target = e.get_eventTarget(),
checkBoxId = '<%= CheckBox1.ClientID %>';
if (target === checkBoxId) {
e.set_enableAjax(false);
}
}
</script>
</telerik:RadCodeBlock>
</div>
OTHER TIPS
Current RadAjax Limitations says,
RadAjaxManager setting will not ajaxify the button... ...when having no updated controls
So, you probably will have to do something like:
<UpdatedControls>
<telerik:AjaxUpdatedControl ControlID="ChechBox1" />
</UpdatedControls>