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WinForms - Update error handling to use SetMainFrameDocumentContentAsync

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This commit is contained in:
Alex Maitland 2022-01-11 13:39:22 +10:00
parent 8b6c799a39
commit 2ae2e3135c
1 changed files with 6 additions and 15 deletions
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CefSharp.MinimalExample.WinForms/BrowserForm.cs
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@ -2,6 +2,7 @@
// //
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
using CefSharp.DevTools.IO;
using CefSharp.MinimalExample.WinForms.Controls; using CefSharp.MinimalExample.WinForms.Controls;
using CefSharp.WinForms; using CefSharp.WinForms;
using System; using System;
@ -54,7 +55,7 @@ namespace CefSharp.MinimalExample.WinForms
DisplayOutput(string.Format("{0}, {1}", version, environment)); DisplayOutput(string.Format("{0}, {1}", version, environment));
} }
private async void OnBrowserLoadError(object sender, LoadErrorEventArgs e) private void OnBrowserLoadError(object sender, LoadErrorEventArgs e)
{ {
//Actions that trigger a download will raise an aborted error. //Actions that trigger a download will raise an aborted error.
//Aborted is generally safe to ignore //Aborted is generally safe to ignore
@ -63,23 +64,13 @@ namespace CefSharp.MinimalExample.WinForms
return; return;
} }
//using LoadHtml/LoadUrl creates an additional history entry that var errorHtml = string.Format("<html><body><h2>Failed to load URL {0} with error {1} ({2}).</h2></body></html>",
//prevents the back button from working correctly.
//Use Devools Page.SetDocumentContent to change the content
using (var client = browser.GetDevToolsClient())
{
var response = await client.Page.GetFrameTreeAsync();
var frames = response.FrameTree;
var mainFrame = frames.Frame;
var errorHtml = string.Format("<html><body><h2>Failed to load URL {0} with error {1} ({2}).</h2></body></html>",
e.FailedUrl, e.ErrorText, e.ErrorCode); e.FailedUrl, e.ErrorText, e.ErrorCode);
_ = client.Page.SetDocumentContentAsync(mainFrame.Id, errorHtml); _ = e.Browser.SetMainFrameDocumentContentAsync(errorHtml);
//AddressChanged isn't called for failed Urls so we need to manually update the Url TextBox //AddressChanged isn't called for failed Urls so we need to manually update the Url TextBox
this.InvokeOnUiThreadIfRequired(() => urlTextBox.Text = e.FailedUrl); this.InvokeOnUiThreadIfRequired(() => urlTextBox.Text = e.FailedUrl);
}
} }
private void OnIsBrowserInitializedChanged(object sender, EventArgs e) private void OnIsBrowserInitializedChanged(object sender, EventArgs e)