Download Files Cefsharp High Quality May 2026

By default, the CefSharp Chromium browser doesn’t automatically download files or show a "Save As" dialog. To enable and control file downloads, you must implement the IDownloadHandler interface and assign it to your browser instance. Core Implementation Steps To handle downloads, follow these three primary steps:

Once your class is ready, assign it to your ChromiumWebBrowser instance during initialization:

using CefSharp; using System; public class MyDownloadHandler : IDownloadHandler { // Triggered when a user clicks a download link public void OnBeforeDownload(IWebBrowser chromiumWebBrowser, IBrowser browser, DownloadItem downloadItem, IBeforeDownloadCallback callback) { if (!callback.IsDisposed) { using (callback) { // Set 'showDialog' to true to show the standard "Save As" window, // or false to download automatically to the suggested path. callback.Continue(downloadItem.SuggestedFileName, showDialog: true); } } } // Triggered periodically as the download progresses public void OnDownloadUpdated(IWebBrowser chromiumWebBrowser, IBrowser browser, DownloadItem downloadItem, IDownloadItemCallback callback) { if (downloadItem.IsComplete) { Console.WriteLine("Download finished: " + downloadItem.FullPath); } } } Use code with caution. Hooking it Up download files cefsharp

CefSharp/CefSharp.Example/DownloadHandler.cs at ... - GitHub

Below is a standard implementation of a custom DownloadHandler that you can add to your C# project. callback

: Implement the IDownloadHandler interface.

: Use OnBeforeDownload to set the file path and decide whether to show a dialog. : Implement the IDownloadHandler interface

: Use OnDownloadUpdated to monitor the percentage complete or perform actions after the download finishes. Implementation Example