在C#开发中CefSharp截取完整网页图片，网页截图

发布：2023/9/17 11:53:11作者：管理员来源：本站浏览次数：884

开发语言C#

框架集.net framework 4.6

需要安装nuget包CefSharp.OffScreen

参考使用CefSharp.OffScreen框架地址

https://github.com/cefsharp/CefSharp/blob/master/CefSharp.OffScreen.Example/Program.cs

将一个网页完整的页面通过代码生成图片

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

using CefSharp;

using CefSharp.DevTools.Page;

using CefSharp.OffScreen;

namespace ConsoleApp_HtmlScreenshot

{

internal class Program

{

static async Task Main(string[] args)

{

#if ANYCPU

//Only required for PlatformTarget of AnyCPU

CefRuntime.SubscribeAnyCpuAssemblyResolver();

#endif

//要截取图片的网页URL

const string testUrl = "https://list.jd.com/list.html?cat=670,671,1105";

var settings = new CefSettings()

{

//By default CefSharp will use an in-memory cache, you need to specify a Cache Folder to persist data

//CachePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "CefSharp\\Cache")

};

//Perform dependency check to make sure all relevant resources are in our output directory.

Cef.Initialize(settings, performDependencyCheck: true, browserProcessHandler: null);

// Create the offscreen Chromium browser.

var browser = new ChromiumWebBrowser(testUrl);

//browser.Size = new System.Drawing.Size(1920, 20000);

//browser.FrameLoadEnd += (s, e) =>{

// Console.WriteLine("1加载完成 "+DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff"));

//};

//等待内容完成加载

await browser.WaitForInitialLoadAsync();

Console.WriteLine("2加载完成 " + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff"));

//网页截图保存地址

string imgName = "CefSharp_screenshot" + DateTime.Now.Ticks + ".jpg";

imgName = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), imgName);

try

{

var cefbrowserHost = browser.GetBrowserHost();

//You can call Invalidate to redraw/refresh the image

cefbrowserHost.Invalidate(PaintElementType.View);

//获取内容尺寸

var contentSize = await browser.GetContentSizeAsync();

var viewport = new Viewport

{

Height = contentSize.Height,

Width = contentSize.Width,

Scale = 1.0

};

Console.WriteLine("截图...");

//var buffer = await browser.CaptureScreenshotAsync();

//完整网页截图

//var buffer = await browser.CaptureScreenshotAsync(viewport: viewport);

var buffer = await browser.CaptureScreenshotAsync(CaptureScreenshotFormat.Jpeg, 100, viewport);

System.IO.File.WriteAllBytes(imgName, buffer);

Console.WriteLine("截图保存完成");

}

catch (Exception ex)

{

string msg = ex.Message;

Console.WriteLine("截图异常：" + msg);

}

// We have to wait for something, otherwise the process will exit too soon.

Console.ReadKey();

// Clean up Chromium objects. You need to call this in your application otherwise

// you will get a crash when closing.

//The ChromiumWebBrowser instance will be disposed

Cef.Shutdown();

}

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通过WebBrowser网页截图C#源码(抓取完整页面及首屏)　

通过WebBrowser网页截图C#源码(抓取完整页面及首屏) 在C#开发中CefSharp截取完整网页图片，网页截图 c# 实现网页加载后将页面截取为长图片 C# WebBrowser的DrawToBitmap方法截取网页保存为图片

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在C#开发中CefSharp截取完整网页图片，网页截图

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