ASPxWebControl.GetCallbackErrorMessage() Method
Obtains the error info while processing the redirection page.
Namespace: DevExpress.Web
Assembly: DevExpress.Web.v24.2.dll
Declaration
Returns
| Type | Description |
|---|---|
| String | A string value representing the error info. |
Remarks
When a server error occurs during a callback processing, and the request is redirected to a specific page (which is specified via the callbackErrorRedirectUrl option within a specific <devExpress> section of the Web.Config file), you can use the static GetCallbackErrorMessage method to obtain the error info within the redirection page.
See Response Redirection on Callback Exceptions to learn more.
Example
In this example, the error message is displayed within the redirected page (Error.aspx) after an exception occurs on a callback within the Default.aspx page.
The redirection page is specified within the devExpress → errors section of the web.config file via the callbackErrorRedirectUrl key (see Redirection on a Callback Error). The error message is obtained by using the static ASPxWebControl.GetCallbackErrorMessage method.
Note
To provide the message redirection between pages, the ASPxHttpHandlerModule should be registered within the web.config file.
<dx:ASPxButton id="ASPxButton1" runat="server" AutoPostBack="False" text="Perform Callback">
<ClientSideEvents Click="function(s, e) { callback1.PerformCallback(); }"></ClientSideEvents>
</dx:ASPxButton>
<dx:ASPxCallback ID="ASPxCallback1" runat="server" ClientInstanceName="callback1"></dx:ASPxCallback>
<head runat="server">
<title>Error</title>
</head>
<body>
<form id="form1" runat="server">
</form>
</body>
</html>
public partial class _Default : Page {
protected void Page_Load(object sender, EventArgs e) {
if(IsCallback) {
NotImplementedException innerException = new NotImplementedException("NoReport");
throw new NotImplementedException("This message has been generated for a GetCallbackErrorMessage() method demonstration.", innerException);
}
}
}
using System;
using System.Web.UI;
using DevExpress.Web;
public partial class Error : Page {
protected void Page_Load(object sender, EventArgs e) {
string errorMessage = ASPxWebControl.GetCallbackErrorMessage();
Response.Output.Write(errorMessage);
}
}
Related GitHub Examples
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the GetCallbackErrorMessage() method.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.