如何从基于.NET的桌面应用程序中截取完整网页的屏幕截图? [英] How can I take a screenshot of a full webpage from a .NET based desktop application ?
本文介绍了如何从基于.NET的桌面应用程序中截取完整网页的屏幕截图?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个桌面应用程序。现在我想要提供一个完整网页的截图,如果我提供任何网页的任何网址。
怎么可能?
I have a desktop application. Now I want to take screenshot of a full webpage if I provide any url of any webpage.
How it is possible ?
private void screenShot_Click(object sender, EventArgs e)
{
}
请记住我不想使用webbrowser控件。
所以尽量给我一个解决方案可能。
Please keep in mind that I don't want to use webbrowser control.
So try to give me a solution if possible.
推荐答案
如果您不想使用WebBrowser控件,那么您需要使用其中一个Httpxxx类来读取给定URL的页面,将其渲染到格式化的显示中,然后以某种方式将其转换为图片并另存为图像。这不是一件容易的事。
If you do not want to use a WebBrowser control, then you would need to use one of the Httpxxx classes to read the page for a given URL, render it into its formatted display, and then somehow convert that to a picture and save as an image. That is not an easy task.
使用System.Drawing参考此代码:
;
使用System.Drawing.Imaging;
使用System.IO;
使用System.Threading;
使用System.Windows.Forms;
公共类WebsiteToImage
{
私有位图m_Bitmap;
私有字符串m_Url;
私有字符串m_FileName = string.Empty;
public WebsiteToImage(string url)
{
//无文件
m_Url = url;
}
public WebsiteToImage(string url,string fileName)
{
/ /带文件
m_Url = url;
m_FileName = fileName;
}
公共位图Generate()
{
//线程
var m_thread =新线程(_Generate);
m_thread.SetApartmentState(ApartmentState。 STA);
m_thread.Start();
m_thread.Join();
返回m_Bitmap;
}
private void _Generate()
{
var browser = new WebBrowser {ScrollBarsEnabled = false};
browser.Navigate(m_Url);
browser.DocumentCompleted + = WebBrowser_DocumentCompleted;
while(browser.ReadyState!= WebBrowserReadyState.Complete)
{
Application.DoEvents();
}
browser.Dispose();
}
private void WebBrowser_DocumentCompleted(object sender,WebBrowserDocumentCompletedEventArgs e)
{
//捕获
var browser =( WebBrowser)发件人;
browser.ClientSize = new Size(browser.Document.Body.ScrollRectangle.Width,browser.Document.Body.ScrollRectangle.Bottom);
浏览器。 ScrollBarsEnabled = false;
m_Bitmap = new Bitmap(browser.Document.Body.ScrollRectangle.Width,browser.Document.Body.ScrollRectangle.Bottom);
browser.BringToFront( );
browser.DrawToBitmap(m_Bitmap,browser.Bounds);
//另存为文件?
if(m_FileName.Length> 0)
{
//保存
m_Bitmap.SaveJPG100(m_FileName );
}
}
}
公共静态类BitmapExtensions
{
public static void SaveJPG100(这个位图bmp,字符串文件名)
{
var encoderParameters = new EncoderParameters(1);
encoderParameters.Param [0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality,100L);
bmp.Save(filename,GetEncoder(ImageFormat.Jpeg),encoderParameters) ;
}
public static void SaveJPG100(此Bitmap bmp,Stream stream)
{
var encoderParameters = new EncoderParameters(1);
encoderParameters.Param [0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality,100L);
bmp.Save(stream ,GetEncoder(ImageFormat.Jpeg),encoderParameters);
}
公共静态ImageCodecInfo GetEncoder(ImageFormat格式)
{
var codecs = ImageCodecInfo.GetImageDecoders();
foreach(编解码器中的var编解码器)
{
if( codec.FormatID == format.Guid)
{
返回编解码器;
}
}
//返回
返回null;
}
}
调用方法:
WebsiteToImage websiteToImage = new WebsiteToImage(http:// www。 111cn.net,@D:Some Folderkeleyi.jpg);
websiteToImage.Generate();
这种方式使用WebBrowser,所以需要引用名称空间System.Windows.Forms。
Refer this code:
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Threading;
using System.Windows.Forms;
public class WebsiteToImage
{
private Bitmap m_Bitmap;
private string m_Url;
private string m_FileName = string.Empty;
public WebsiteToImage(string url)
{
// Without file
m_Url = url;
}
public WebsiteToImage(string url, string fileName)
{
// With file
m_Url = url;
m_FileName = fileName;
}
public Bitmap Generate()
{
// Thread
var m_thread = new Thread(_Generate);
m_thread.SetApartmentState(ApartmentState.STA);
m_thread.Start();
m_thread.Join();
return m_Bitmap;
}
private void _Generate()
{
var browser = new WebBrowser { ScrollBarsEnabled = false };
browser.Navigate(m_Url);
browser.DocumentCompleted += WebBrowser_DocumentCompleted;
while (browser.ReadyState != WebBrowserReadyState.Complete)
{
Application.DoEvents();
}
browser.Dispose();
}
private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
// Capture
var browser = (WebBrowser)sender;
browser.ClientSize = new Size(browser.Document.Body.ScrollRectangle.Width, browser.Document.Body.ScrollRectangle.Bottom);
browser.ScrollBarsEnabled = false;
m_Bitmap = new Bitmap(browser.Document.Body.ScrollRectangle.Width, browser.Document.Body.ScrollRectangle.Bottom);
browser.BringToFront();
browser.DrawToBitmap(m_Bitmap, browser.Bounds);
// Save as file?
if (m_FileName.Length > 0)
{
// Save
m_Bitmap.SaveJPG100(m_FileName);
}
}
}
public static class BitmapExtensions
{
public static void SaveJPG100(this Bitmap bmp, string filename)
{
var encoderParameters = new EncoderParameters(1);
encoderParameters.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 100L);
bmp.Save(filename, GetEncoder(ImageFormat.Jpeg), encoderParameters);
}
public static void SaveJPG100(this Bitmap bmp, Stream stream)
{
var encoderParameters = new EncoderParameters(1);
encoderParameters.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 100L);
bmp.Save(stream, GetEncoder(ImageFormat.Jpeg), encoderParameters);
}
public static ImageCodecInfo GetEncoder(ImageFormat format)
{
var codecs = ImageCodecInfo.GetImageDecoders();
foreach (var codec in codecs)
{
if (codec.FormatID == format.Guid)
{
return codec;
}
}
// Return
return null;
}
}
Invocation Method:
WebsiteToImage websiteToImage = new WebsiteToImage( http://www.111cn.net, @"D:Some Folderkeleyi.jpg");
websiteToImage.Generate();
This way uses WebBrowser,so need to quote namespace System.Windows.Forms.
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