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‎controls/ajaxmanager/known-limitations.md‎

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@@ -47,14 +47,14 @@ This article lists the known limitations you may encounter when working with the
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* **Ajaxified control postbacks when controls are not updated**—The AjaxManager setting from the following example will not ajaxify the button.
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````ASP.NET
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````ASP.NET
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<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
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<AjaxSettings>
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<telerik:AjaxSetting AjaxControlID="Button1">
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</telerik:AjaxSetting>
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</AjaxSettings>
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</telerik:RadAjaxManager>
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````
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````
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@@ -64,21 +64,21 @@ This article lists the known limitations you may encounter when working with the
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<UpdatedControls>
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<telerik:AjaxUpdatedControl ControlID="Button1" />
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</UpdatedControls>
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````
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````
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* **Using the AjaxManager and AjaxPanel in the same application**&mdash;In some complex scenarios, such as when using a master page or WebUserControls, having both the AjaxManager and the AjaxPanel may lead to issues. To handle such problems, use a single AjaxManager and no panels in the master or main page of the project.
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* **The `OnRequestSent` and `OnResponseReceived` clisent-side events are missing**&mdash;The AjaxManager does not provide these events and you cannot simulate them due to the way ASP.NET AJAX works. To work around this issue, use the [`OnRequestStart`]({%slug ajaxmanager/client-side-programming/events/requeststart%}) and [`OnResponseEnd`]({%slug ajaxmanager/client-side-programming/events/responseend%}) for your needs.
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* **The `OnRequestSent` and `OnResponseReceived` client-side events are missing**&mdash;The AjaxManager does not provide these events and you cannot simulate them due to the way ASP.NET AJAX works. To work around this issue, use the [`OnRequestStart`]({%slug ajaxmanager/client-side-programming/events/requeststart%}) and [`OnResponseEnd`]({%slug ajaxmanager/client-side-programming/events/responseend%}) for your needs.
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* **Various controls are not supported by the Microsoft AJAX framework**&mdash;For the full list of controls that are not compatible with the AjaxManager, refer to the article on [checking for incompatible controls and updating third-party controls]({%slug ajaxmanager/how-to/incompatible-controls-and-updating-3rd-party-controls-with-telerik-radajax%}).
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* **AJAX requests are not working when `RestoreOriginalRenderDelegate` is `false`**&mdash;The same issue may occur when inheriting from an AjaxPage to support Medium Trust in DNN or SharePoint. You need to consider these limitations when you configure the AjaxManager or the AjaxPanel for your particular project schema.
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* **When using Medium Trust, client-side validation does not execute and validators are added dynamically during an Ajax call**&mdash;When the Medium Trust level is used, you cannot use reflection to set private properties. However, when you use validators in a template that is placed in an AjaxPanel, you need to set the `_parent` private property of the validators to the updated panel with reflection. This approach is required so that all validators are rendered as expected. Therefore, in such scenarios, to make validators work as expected, use `asp:UpdatePanel` instead of the AjaxPanel or AjaxManager.
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* **Parent-child control configuration**&mdash;Child elements cannot be the `AjaxSetting` initiator or update their parent container element. To add and update a container or a parent control, allow the container or the control, or an external component to be the initiator. It is similar to placing a `telerik:RadAjaxPanel` or `asp:UpdatePanel` on the page: it will affect only the content inside this panel. The AjaxManager is similar; only it achieves what is going on under the hood.
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* **Parent-child control configuration**&mdash;Child elements cannot be the `AjaxSetting` initiator or update their parent container element. To add and update a container or a parent control, allow the container or the control, or an external component to be the initiator. It is similar to placing a `telerik:RadAjaxPanel` or `asp:UpdatePanel` on the page: it will affect only the content inside this panel. The AjaxManager is similar; only it achieves what is happening under the hood.
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## See Also
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‎controls/ajaxmanager/server-side-programming/methods.md‎

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````C#
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RadAjaxManager1.Alert("Please save your changes.");
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````
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````
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````VB
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RadAjaxManager1.Alert("Please save your changes.")
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````
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````
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* `FocusControl`&mdash;Places the focus on a specified control. `FocusControl()` takes a single parameter that can be the `ID` of the control to focus on or an object reference to the control to focus on.
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````C#
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RadAjaxManager1.FocusControl(Button1);
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````
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````
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````VB
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RadAjaxManager1.FocusControl(Button1)
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````
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````
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* `GetAjaxEventReference`&mdash;Produces client-side code that invokes the [`ajaxRequest()`]({%slug ajaxmanager/client-side-programming/overview%}) method.
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````C#
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RadAjaxManager1.GetAjaxEventReference(Button1.ClientID);
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//... returns "$find("RadAjaxManager1").ajaxRequest("Button1");"
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````
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````
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````VB
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RadAjaxManager1.GetAjaxEventReference(Button1.ClientID)
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'... returns "$find("RadAjaxManager1").ajaxRequest("Button1");"
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````
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````
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* `RaisePostBackEvent`&mdash;Triggers a server-side [`AjaxRequest`]({%slug ajaxmanager/server-side-programming/events/onajaxrequest%}) event and allows you to pass a single string parameter to the event. `AjaxRequest` can also be triggered by the client-side [`ajaxRequest()`]({%slug ajaxmanager/client-side-programming/overview%}) function.
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{
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Label1.Text = e.Argument;
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}
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````
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````
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````VB
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Protected Sub RadAjaxManager1_AjaxRequest(ByVal sender As Object, ByVal e As Telerik.Web.UI.AjaxRequestEventArgs) Handles RadAjaxManager1.AjaxRequest
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Label1.Text = e.Argument
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End Sub
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````
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````
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* `Redirect`&mdash;Navigates the browser to another web page. The method passes a single string parameter, which is the URL to navigate to.
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````C#
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RadAjaxManager1.Redirect("https://www.telerik.com");
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````
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````
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````VB.NET
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RadAjaxManager1.Redirect("https://www.telerik.com")
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````
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````
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## See Also
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* [AjaxManager Server-Side Properties]({%slug ajaxmanager/server-side-programming/properties%})
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* [AjaxUpdatedControl Properties]({%slug ajaxmanager/server-side-programming/ajaxupdatedcontrol-properties%})
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* [AjaxUpdatedControl Properties]({%slug ajaxmanager/server-side-programming/ajaxupdatedcontrol-properties%})

‎controls/chat/getting-started.md‎

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@@ -22,68 +22,66 @@ The following tutorial demonstrates how you can add a simple **RadChat** control
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>caption **Example 1**: Declaration of a **RadChat** control.
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````ASP.NET
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<asp:ScriptManager runat="server" ID="ScriptManager1" />
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<telerik:RadChat ID="RadChat1" runat="server">
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</telerik:RadChat>
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````
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````ASP.NET
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<asp:ScriptManager runat="server" ID="ScriptManager1" />
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<telerik:RadChat ID="RadChat1" runat="server">
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</telerik:RadChat>
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````
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1. Set some of the messages and user settings like **Placeholder**, **Name** and **IconUrl**.
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>caption **Example 2**: The chat now has a custom placeholder message, username and avatar
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````ASP.NET
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<asp:ScriptManager runat="server" ID="ScriptManager1" />
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<telerik:RadChat runat="server" ID="RadChat1">
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<MessagesSettings Placeholder="Type your message here..." />
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<UserSettings Name="John" IconUrl="avatar.png" />
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</telerik:RadChat>
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````
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````ASP.NET
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<asp:ScriptManager runat="server" ID="ScriptManager1" />
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<telerik:RadChat runat="server" ID="RadChat1">
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<MessagesSettings Placeholder="Type your message here..." />
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<UserSettings Name="John" IconUrl="avatar.png" />
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</telerik:RadChat>
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````
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1. Press F5 to run the application. You will see the chat that is displayed in **Figure 1**. From this point you can start interacting with the chat.
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>caption **Example 3**: Assigning the client-side event handlers:
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````ASP.NET
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<asp:ScriptManager runat="server" ID="ScriptManager1" />
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<telerik:RadChat runat="server" ID="RadChat1" Width="300px" Height="300px">
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<ClientEvents
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OnActionClick="OnActionClick"
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OnInitialize="OnInitialize"
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OnLoad="OnLoad"
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OnPost="OnPost"
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OnSendMessage="OnSendMessage"
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OnTypingEnd="OnTypingEnd"
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OnTypingStart="OnTypingStart" />
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<MessagesSettings Placeholder="Type your message here..." />
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<UserSettings Name="John" IconUrl="avatar.png" />
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</telerik:RadChat>
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````
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````JavaScript
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function OnActionClick(sender, args) {
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}
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function OnInitialize(sender, args) {
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}
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function OnLoad(sender) {
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sender.postMessage("Hello!");
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}
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function OnPost(sender) {
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}
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function OnSendMessage(sender, args) {
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}
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function OnTypingEnd(sender, args) {
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}
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function OnTypingStart(sender, args) {
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}
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````
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````ASP.NET
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<asp:ScriptManager runat="server" ID="ScriptManager1" />
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<telerik:RadChat runat="server" ID="RadChat1" Width="300px" Height="300px">
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<ClientEvents
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OnActionClick="OnActionClick"
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OnInitialize="OnInitialize"
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OnLoad="OnLoad"
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OnPost="OnPost"
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OnSendMessage="OnSendMessage"
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OnTypingEnd="OnTypingEnd"
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OnTypingStart="OnTypingStart" />
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<MessagesSettings Placeholder="Type your message here..." />
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<UserSettings Name="John" IconUrl="avatar.png" />
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</telerik:RadChat>
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<script>
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function OnActionClick(sender, args) {
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}
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function OnInitialize(sender, args) {
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}
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function OnLoad(sender) {
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sender.postMessage("Hello!");
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}
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function OnPost(sender) {
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}
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function OnSendMessage(sender, args) {
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}
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function OnTypingEnd(sender, args) {
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}
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function OnTypingStart(sender, args) {
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}
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</script>
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````
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Once you have a working Chat control, you can use the [client-side API]({%slug chat/client-side-programming/overview%}) of the chat to [connect it to a Chatbot service]({%slug chat/how-to/configure-chat-agent%}).
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‎controls/combobox/troubleshooting/back-button-and-selectedvalue.md‎

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3. Click on the Back button of the browser
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The combobox shows the correct text, but the SelectedValue property is not correct (the SelectedItem is lost).
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The combobox shows the correct text, but the SelectedValue property is incorrect (the SelectedItem is lost).
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**WORKAROUND**
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1. Add a hidden field to the page which will hold the selected value of the combobox:
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1. Add a hidden field to the page that will hold the selected value of the combobox:
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````ASPNET
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````ASPNET
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<input type="hidden" id="RadComboBox1Value" value="" />
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````
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````
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2. Subscribe to the [OnClientSelectedIndexChanged]({%slug combobox/client-side-programming/events/onclientselectedindexchanged%}) event and update that hidden field:
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````JavaScript
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function onSelectedIndexChanged(sender, eventArgs) {
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$get("RadComboBox1Value").value = eventArgs.get_item().get_value();
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}
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````
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````JavaScript
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function onSelectedIndexChanged(sender, eventArgs) {
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$get("RadComboBox1Value").value = eventArgs.get_item().get_value();
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}
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````
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3. On pageLoad() check for the value of the hidden field. If it is not empty - find the appropriate combo item and select it:
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````JavaScript
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function pageLoad() {
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var savedValue = $get("RadComboBox1Value").value;
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var combo = $find('<%= RadComboBox1.ClientID %>');
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if (savedValue != "" && combo.findItemByValue(savedValue)) {
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combo.findItemByValue(savedValue).select();
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````JavaScript
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function pageLoad() {
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var savedValue = $get("RadComboBox1Value").value;
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var combo = $find('<%= RadComboBox1.ClientID %>');
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if (savedValue != "" && combo.findItemByValue(savedValue)) {
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combo.findItemByValue(savedValue).select();
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}
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}
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}
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````
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````
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Here is the final code:
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````ASPNET
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<telerik:RadComboBox RenderMode="Lightweight" ID="RadComboBox1"
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runat="server"
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OnClientSelectedIndexChanged="onSelectedIndexChanged">
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<Items>
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<telerik:RadComboBoxItem runat="server" Text="Red" Value="red" />
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<telerik:RadComboBoxItem runat="server" Text="Blue" Value="blue" />
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<telerik:RadComboBoxItem runat="server" Text="Green" Value="Green" />
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</Items>
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</telerik:RadComboBox>
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<input type="hidden" id="RadComboBox1Value" value="" />
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<asp:Button ID="Button1" runat="server" Text="Button that Redirects" />
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<script type="text/javascript">
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function pageLoad() {
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var savedValue = $get("RadComboBox1Value").value;
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var combo = $find('<%= RadComboBox1.ClientID %>');
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if (savedValue != "" && combo.findItemByValue(savedValue)) {
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combo.findItemByValue(savedValue).select();
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<telerik:RadComboBox RenderMode="Lightweight" ID="RadComboBox1"
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runat="server"
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OnClientSelectedIndexChanged="onSelectedIndexChanged">
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<Items>
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<telerik:RadComboBoxItem runat="server" Text="Red" Value="red" />
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<telerik:RadComboBoxItem runat="server" Text="Blue" Value="blue" />
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<telerik:RadComboBoxItem runat="server" Text="Green" Value="Green" />
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</Items>
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</telerik:RadComboBox>
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<input type="hidden" id="RadComboBox1Value" value="" />
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<asp:Button ID="Button1" runat="server" Text="Button that Redirects" />
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<script type="text/javascript">
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function pageLoad() {
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var savedValue = $get("RadComboBox1Value").value;
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var combo = $find('<%= RadComboBox1.ClientID %>');
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if (savedValue != "" && combo.findItemByValue(savedValue)) {
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combo.findItemByValue(savedValue).select();
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}
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}
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}
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function onSelectedIndexChanged(sender, eventArgs) {
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$get("RadComboBox1Value").value = eventArgs.get_item().get_value();
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}
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</script>
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function onSelectedIndexChanged(sender, eventArgs) {
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$get("RadComboBox1Value").value = eventArgs.get_item().get_value();
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}
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</script>
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````
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‎controls/switch/troubleshooting/distorted-appearance.md‎

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@[template](/_templates/button/distorted-appearance.md#intro "control: RadSwitch")
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````ASP.NET
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<telerik:RadButton RenderMode="Lightweight" ID="RadButton1" runat="server" Text="RadButton" />
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<telerik:RadButton RenderMode="Classic" ID="RadButton1" runat="server" Text="RadButton" ButtonType="ToggleButton" ToggleType="CheckBox" />
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<br />
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<telerik:RadLabel ID="Label1" runat="server" AssociatedControlID="RadSwitch1" Text="RadSwitch"></telerik:RadLabel>
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<telerik:RadSwitch ID="RadSwitch1" runat="server" Checked="true"></telerik:RadSwitch>
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<telerik:RadSwitch RenderMode="Lightweight" ID="RadSwitch1" runat="server" Checked="true"></telerik:RadSwitch>
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````
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@[template](/_templates/button/distorted-appearance.md#cause-resolve "control: RadSwitch")

‎controls/switch/troubleshooting/images/distorted-appearance.png‎

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