【二百分】页面高度有关问题

2012-08-13

【二百分求助】页面高度问题百分结贴，再加上这个帖子：共200分。抓取网页快照的时候，下面的语句只能抓取指定尺

【二百分求助】页面高度问题
百分结贴，再加上这个帖子：共200分。
抓取网页快照的时候，下面的语句只能抓取指定尺寸的图片，有时候抓不全，有时候留下好多空白：
Bitmap bmp = HtmlToImg.GetHtmlToImg("http://www.baidu.com", 600, 500, 600, 500);
怎样直接获取被抓取页面的宽和高？WebBrowser的Document对象的属性WebBrowser.Document.Body.ScrollRectangle.Height该怎么用？
我不是程序员，对net不够熟练，谁能直接修改下面的代码帮我实现抓取完整页面（直接抓取和网页宽和高相同的图片）：
aspx.cs

C# code

using System;using System.Collections.Generic;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Drawing;using System.IO;public partial class _Default : System.Web.UI.Page{    protected void Page_Load(object sender, EventArgs e)    {    }    protected void Button1_Click(object sender, EventArgs e)    {        Bitmap bmp = HtmlToImg.GetHtmlToImg("http://www.baidu.com", 600, 500, 600, 500);        MemoryStream stream = new MemoryStream();        bmp.Save(stream, System.Drawing.Imaging.ImageFormat.Jpeg);        byte[] buff = stream.ToArray();        FileStream fs = new FileStream(Server.MapPath(DateTime.Now.ToString("yyyyMMddHHmmss") + ".jpg"), FileMode.Create);        stream.WriteTo(fs);        stream.Close();        fs.Close();    }}

HtmlToImage.cs

C# code

using System;using System.Drawing;using System.Threading;using System.Windows.Forms;/// <summary>/// 生成网页快照/// </summary>public class HtmlToImg{    Bitmap m_Bitmap;    string m_Url;    int m_BrowserWidth, m_BrowserHeight, m_ThumbnailWidth, m_ThumbnailHeight;    public HtmlToImg(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight)    {        m_Url = Url;        m_BrowserHeight = BrowserHeight;        m_BrowserWidth = BrowserWidth;        m_ThumbnailWidth = ThumbnailWidth;        m_ThumbnailHeight = ThumbnailHeight;    }    public static Bitmap GetHtmlToImg(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight)    {        HtmlToImg thumbnailGenerator = new HtmlToImg(Url, BrowserWidth, BrowserHeight, ThumbnailWidth, ThumbnailHeight);        return thumbnailGenerator.GenerateHtmlToImgImage();    }    public Bitmap GenerateHtmlToImgImage()    {        Thread m_thread = new Thread(new ThreadStart(_GenerateHtmlToImgImage));        m_thread.SetApartmentState(ApartmentState.STA);        m_thread.Start();        m_thread.Join();        return m_Bitmap;    }    private void _GenerateHtmlToImgImage()    {        WebBrowser m_WebBrowser = new WebBrowser();        m_WebBrowser.ScrollBarsEnabled = false;        m_WebBrowser.Navigate(m_Url);        m_WebBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(WebBrowser_DocumentCompleted);        while (m_WebBrowser.ReadyState != WebBrowserReadyState.Complete)            Application.DoEvents();        m_WebBrowser.Dispose();    }    private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)    {        WebBrowser m_WebBrowser = (WebBrowser)sender;        m_WebBrowser.ClientSize = new Size(this.m_BrowserWidth, this.m_BrowserHeight);        m_WebBrowser.ScrollBarsEnabled = false;        m_Bitmap = new Bitmap(m_WebBrowser.Bounds.Width, m_WebBrowser.Bounds.Height);        m_WebBrowser.BringToFront();        m_WebBrowser.DrawToBitmap(m_Bitmap, m_WebBrowser.Bounds);        m_Bitmap = (Bitmap)m_Bitmap.GetThumbnailImage(m_ThumbnailWidth, m_ThumbnailHeight, null, IntPtr.Zero);    }}

[解决办法]
用我的代码！
你自己转C#吧

VB.NET code

Imports System.CollectionsImports System.ConfigurationImports System.DataImports System.WebImports System.Web.SecurityImports System.Web.UIImports System.Web.UI.HtmlControlsImports System.Web.UI.WebControlsImports System.Web.UI.WebControls.WebPartsImports System.DrawingImports System.Drawing.ImagingImports System.ThreadingPublic Class Form1    Private _webBrowser As System.Windows.Forms.WebBrowser    Public pic As String    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click        Dim tb As New Data.DataTable        tb = code.Data_DataTable("select a_url,ID from a_domain order by id").Tables(0)        ProgressBar1.Maximum = tb.Rows.Count        ProgressBar1.Minimum = 0        Dim i As Integer        For i = 0 To tb.Rows.Count - 1            Dim url As String = tb.Rows(i).Item("a_url")            Dim id As Integer = tb.Rows(i).Item("id")            pic = "b_" & id & "_" & DateTime.Now.ToString("yyyyMMdd") & ".jpg"            _webBrowser = New System.Windows.Forms.WebBrowser()            _webBrowser.ScrollBarsEnabled = False    '不显示滚动条            _webBrowser.Navigate(url)            AddHandler _webBrowser.DocumentCompleted, New System.Windows.Forms.WebBrowserDocumentCompletedEventHandler(AddressOf Completed)            While _webBrowser.ReadyState <> System.Windows.Forms.WebBrowserReadyState.Complete                '避免假死，若去掉则可能无法触发 DocumentCompleted 事件。                System.Windows.Forms.Application.DoEvents()            End While            code.Data_update("insert into a_domain_pic(a_id,a_img)values('" & id & "','" & pic & "')")            ProgressBar1.Value += 1        Next    End Sub    Public Sub Completed(ByVal sender As Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs)        '设置浏览器宽度、高度为文档宽度、高度，以便截取整个网页。        Dim fileName As String = "C:\img\" & pic        '_webBrowser.Width = _webBrowser.Document.Body.ScrollRectangle.Width        '_webBrowser.Height = _webBrowser.Document.Body.ScrollRectangle.Height        _webBrowser.Width = 1000        _webBrowser.Height = 1000        Using bmp As New Bitmap(_webBrowser.Width, _webBrowser.Height)            _webBrowser.DrawToBitmap(bmp, New Rectangle(0, 0, bmp.Width, bmp.Height))            bmp.Save(fileName, ImageFormat.Jpeg)            Dim originalFilename As String = fileName            Dim strGoodFile As String = fileName.Replace("b_", "s_")            '从文件取得图片对象             Dim image As System.Drawing.Image = System.Drawing.Image.FromFile(originalFilename)            '取得图片大小             'Dim size As System.Drawing.Size = New Drawing.Size(image.Width \ iScale, image.Height \ iScale)            Dim w As Integer = 150            Dim h As Integer = 150            '新建一个bmp图片             'Dim bitmap As System.Drawing.Image = New System.Drawing.Bitmap(size.Width, size.Height)            Dim bitmap As System.Drawing.Image = New System.Drawing.Bitmap(w, h)            '新建一个画板             Dim g As System.Drawing.Graphics = System.Drawing.Graphics.FromImage(bitmap)            '设置高质量插值法             g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High            '设置高质量,低速度呈现平滑程度             g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality            '清空一下画布             g.Clear(Drawing.Color.Transparent)            '在指定位置画图             g.DrawImage(image, New System.Drawing.Rectangle(0, 0, bitmap.Width, bitmap.Height), New System.Drawing.Rectangle(0, 0, image.Width, image.Height), System.Drawing.GraphicsUnit.Pixel)            '保存高清晰度的缩略图             bitmap.Save(strGoodFile, System.Drawing.Imaging.ImageFormat.Jpeg)            g.Dispose()        End Using    End Sub    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click        End    End SubEnd Class 
 
[解决办法]
因为你这个代码我运行了有图片这个文件，但没截下来，所以我在网上找了个和你这个相似的。如果你那个代码在你那截图截的下来的话，你只要改下这个类代码即可。如下所示：
  private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
       {
           //WebBrowser m_WebBrowser = (WebBrowser)sender;
           //m_WebBrowser.ClientSize = new Size(this.m_BrowserWidth, this.m_BrowserHeight);
           //m_WebBrowser.ScrollBarsEnabled = false;
           //m_Bitmap = new Bitmap(m_WebBrowser.Bounds.Width, m_WebBrowser.Bounds.Height);
           //m_WebBrowser.BringToFront();
           //m_WebBrowser.DrawToBitmap(m_Bitmap, m_WebBrowser.Bounds);
           //m_Bitmap = (Bitmap)m_Bitmap.GetThumbnailImage(m_ThumbnailWidth, m_ThumbnailHeight, null, IntPtr.Zero);

           WebBrowser m_WebBrowser = (WebBrowser)sender;
           m_WebBrowser.ClientSize = new Size(this.m_BrowserWidth, this.m_BrowserHeight);
           m_WebBrowser.ScrollBarsEnabled = false  ;
           m_WebBrowser.Height = m_WebBrowser.Document.Body.ScrollRectangle.Height + 20;
           m_WebBrowser.Width =1024;
           m_Bitmap = new Bitmap(m_WebBrowser.Width, m_WebBrowser.Height);
           m_WebBrowser.BringToFront();
           m_WebBrowser.DrawToBitmap(m_Bitmap, m_WebBrowser.Bounds);
           m_Bitmap = (Bitmap)m_Bitmap.GetThumbnailImage(m_WebBrowser.Width, m_WebBrowser.Height, null, IntPtr.Zero);
          
       }





如果有什么问题，你把我这所有代码在另外复制下运行看看！
webform1里的代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Drawing;
using System.IO;


namespace WebApplication8
{
   public partial class WebForm1 : System.Web.UI.Page
   {
       protected void Page_Load(object sender, EventArgs e)
       {

       }

       protected void Button1_Click(object sender, EventArgs e)
       {
           //Bitmap bmp = HtmlToImg.GetHtmlToImg("http://www.baidu.com", 600, 500, 600, 500);
           //MemoryStream stream = new MemoryStream();
           //bmp.Save(stream, System.Drawing.Imaging.ImageFormat.Jpeg);
           //byte[] buff = stream.ToArray();
           //FileStream fs = new FileStream(Server.MapPath(DateTime.Now.ToString("yyyyMMddHHmmss") + ".jpg"), FileMode.Create);
           //stream.WriteTo(fs);
           //stream.Close();
           //fs.Close();
           Bitmap m_Bitmap = HtmlToImg.GetWebSiteThumbnail("http://z.firefoxchina.cn", 600, 600, 600, 600);
           MemoryStream ms = new MemoryStream();
           m_Bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);//JPG、GIF、PNG等均可
           byte[] buff = ms.ToArray();
           //Response.BinaryWrite(buff);
           FileStream fs = new FileStream(Server.MapPath(DateTime.Now.ToString("yyyyMMddHHmmss") + ".png"), FileMode.Create);
           ms.WriteTo(fs);
           ms.Close();
           fs.Close();

       }
   }
}
类里面的代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Drawing;
using System.Threading;
using System.Windows.Forms;

namespace WebApplication8
{
   public class HtmlToImg
   {

       Bitmap m_Bitmap;
       string m_Url;
       int m_BrowserWidth, m_BrowserHeight, m_ThumbnailWidth, m_ThumbnailHeight;
       public HtmlToImg(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight)
       {
           m_Url = Url;
           m_BrowserHeight = BrowserHeight;
           m_BrowserWidth = BrowserWidth;
           m_ThumbnailWidth = ThumbnailWidth; 
 
           m_ThumbnailHeight = ThumbnailHeight;
       }
       public static Bitmap GetWebSiteThumbnail(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight)
       {
           HtmlToImg thumbnailGenerator = new HtmlToImg(Url, BrowserWidth, BrowserHeight, ThumbnailWidth, ThumbnailHeight);
           return thumbnailGenerator.GenerateWebSiteThumbnailImage();
       }
       public Bitmap GenerateWebSiteThumbnailImage()
       {
           Thread m_thread = new Thread(new ThreadStart(_GenerateWebSiteThumbnailImage));
           m_thread.SetApartmentState(ApartmentState.STA);
           m_thread.Start();
           m_thread.Join();
           return m_Bitmap;
       }
       private void _GenerateWebSiteThumbnailImage()
       {
           WebBrowser m_WebBrowser = new WebBrowser();
         
           m_WebBrowser.ScrollBarsEnabled = false  ;
           m_WebBrowser.Navigate(m_Url);
          
           m_WebBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(WebBrowser_DocumentCompleted);
           while (m_WebBrowser.ReadyState != WebBrowserReadyState.Complete)
               Application.DoEvents();
           m_WebBrowser.Dispose();
       }
       private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
       {
           //WebBrowser m_WebBrowser = (WebBrowser)sender;
           //m_WebBrowser.ClientSize = new Size(this.m_BrowserWidth, this.m_BrowserHeight);
           //m_WebBrowser.ScrollBarsEnabled = false;
           //m_Bitmap = new Bitmap(m_WebBrowser.Bounds.Width, m_WebBrowser.Bounds.Height);
           //m_WebBrowser.BringToFront();
           //m_WebBrowser.DrawToBitmap(m_Bitmap, m_WebBrowser.Bounds);
           //m_Bitmap = (Bitmap)m_Bitmap.GetThumbnailImage(m_ThumbnailWidth, m_ThumbnailHeight, null, IntPtr.Zero);

           WebBrowser m_WebBrowser = (WebBrowser)sender;
           m_WebBrowser.ClientSize = new Size(this.m_BrowserWidth, this.m_BrowserHeight);
           m_WebBrowser.ScrollBarsEnabled = false  ;
           m_WebBrowser.Height = m_WebBrowser.Document.Body.ScrollRectangle.Height + 20;
           m_WebBrowser.Width =1024;
           m_Bitmap = new Bitmap(m_WebBrowser.Width, m_WebBrowser.Height);
           m_WebBrowser.BringToFront();
           m_WebBrowser.DrawToBitmap(m_Bitmap, m_WebBrowser.Bounds);
           m_Bitmap = (Bitmap)m_Bitmap.GetThumbnailImage(m_WebBrowser.Width, m_WebBrowser.Height, null, IntPtr.Zero);
          
       }

   }
}
[解决办法]
你加下我QQ，我回复你的私信里有我号码

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【二百分】页面高度有关问题