网页转换成图片

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace SendFengmi
{
///
/// HTML 转化成图片打印
///
public class GetImage
{
private int S_Height;
private int S_Width;
private int F_Height;
private int F_Width;
private string HTML;

    public int ScreenHeight
    {
        get { return S_Height; }
        set { S_Height = value; }
    }

    public int ScreenWidth
    {
        get { return S_Width; }
        set { S_Width = value; }
    }

    public int ImageHeight
    {
        get { return F_Height; }
        set { F_Height = value; }
    }

    public int ImageWidth
    {
        get { return F_Width; }
        set { F_Width = value; }
    }

    public string WebSite
    {
        get { return HTML; }
        set { HTML = value; }
    }

    public GetImage(string WebSite, int ScreenWidth, int ScreenHeight, int ImageWidth, int ImageHeight)
    {
        this.WebSite = WebSite;
        this.ScreenWidth = ScreenWidth;
        this.ScreenHeight = ScreenHeight;
        this.ImageHeight = ImageHeight;
        this.ImageWidth = ImageWidth;
    }

    public Bitmap GetBitmap()
    {
        WebPageBitmap Shot = new WebPageBitmap(this.WebSite, this.ScreenWidth, this.ScreenHeight);
        Shot.GetIt();
        Bitmap Pic = Shot.DrawBitmap(this.ImageHeight, this.ImageWidth);
        return Pic;
    }
}

public class WebPageBitmap
{
    WebBrowser MyBrowser;
    string HTML;
    int Height;
    int Width;

    public WebPageBitmap(string html, int width, int height)
    {
        this.Height = height;
        this.Width = width;
        this.HTML = html;
        MyBrowser = new WebBrowser();
        MyBrowser.ScrollBarsEnabled = false;
        MyBrowser.Size = new Size(this.Width, this.Height);
    }

    public void GetIt()
    {
        MyBrowser.DocumentText = HTML;
        //也可用rul
        //MyBrowser.Navigate(@"C:\Documents and Settings\Administrator\桌面\1.html");
        while (MyBrowser.ReadyState != WebBrowserReadyState.Complete)
        {
            Application.DoEvents();
            System.Threading.Thread.Sleep(100);
        }
    }

    public Bitmap DrawBitmap(int theight, int twidth)
    {
        Bitmap myBitmap = new Bitmap(Width, Height);
        Rectangle DrawRect = new Rectangle(0, 0, Width, Height);
        MyBrowser.DrawToBitmap(myBitmap, DrawRect);
        System.Drawing.Image imgOutput = myBitmap;
        System.Drawing.Image oThumbNail = new Bitmap(twidth, theight, imgOutput.PixelFormat);
        Graphics g = Graphics.FromImage(oThumbNail);
        g.CompositingQuality = CompositingQuality.HighSpeed;
        g.SmoothingMode = SmoothingMode.HighSpeed;
        g.InterpolationMode = InterpolationMode.HighQualityBilinear;
        Rectangle oRectangle = new Rectangle(0, 0, twidth, theight);
        g.DrawImage(imgOutput, oRectangle);
        try
        {
            return (Bitmap)oThumbNail;
        }
        catch (Exception ex)
        {
            return null;
        }
        finally
        {
            imgOutput.Dispose();
            imgOutput = null;
            MyBrowser.Dispose();
            MyBrowser = null;
        }
    }
}

}