用C＃获取webbrowser控件中HTML元素的绝对位置 [英] getting absolute position of HTML element in webbrowser control with C#

问题描述

我想知道是否有可能得到我使用C＃加载webbrowser控件的特定HTML元素的绝对位置。

我尝试了几乎所有的选项.Net提供..
他们都没有给我正确的位置。他们都给我0为Y坐标..元素肯定不是在0 ..

有没有人有任何解决方案或想法来解决这个问题？

解决方案

这是我到目前为止的解决方案：
$ b

//将网页浏览器的大小设置为与图像大小相同
int width，height;
width = webBrowser1.Document.Images [0] .ClientRectangle.Width;
height = webBrowser1.Document.Images [0] .ClientRectangle.Height;

  webBrowser1.Width = width; 
 webBrowser1.Height = height; 
 
 //垂直滚动到该元素
 webBrowser1.Document.Images [0] .OffsetParent.ScrollIntoView（true）; 
 
 //计算元素的x，y偏移量
 int x = webBrowser1.Document.Images [s] .OffsetRectangle.Left + 
 webBrowser1.Document.Images [s] .OffsetParent.OffsetRectangle.Left + 
 webBrowser1.Document.Images [s] .OffsetParent.OffsetParent.OffsetRectangle.Left + 
 webBrowser1.Document.Images [s] .OffsetParent.OffsetParent.OffsetParent.OffsetRectangle.Left + 
 webBrowser1.Document.Images [s] .OffsetParent.OffsetParent.OffsetParent.OffsetParent.OffsetRectangle.Left; 
 
 int y = webBrowser1.Document.GetElementsByTagName（HTML）[0] .ScrollTop; 
 
 //现在滚动到那个元素
 webBrowser1.Document.Window.ScrollTo（x，y）; 
  

现在这个代码完美地工作..但计算偏移有一个问题。我需要计算元素的offsetparent，然后计算offsetparent的offsetparent等。我需要动态地不添加它一个接一个..我不知道该怎么做。任何想法？

编辑：
这里是我的最后和最终版本，它可以与任何html元素一起使用，它会找到绝对

  public int getXoffset（HtmlElement el）
 {
 // get元素pos 
 int xPos = el.OffsetRectangle.Left; 
 
 //获取父母pos 
 HtmlElement tempEl = el.OffsetParent; 
 while（tempEl！= null）
 {
 xPos + = tempEl.OffsetRectangle.Left; 
 tempEl = tempEl.OffsetParent; 
} 
 
 return xPos; 
} 
 
 public int getYoffset（HtmlElement el）
 {
 // get元素pos 
 int yPos = el.OffsetRectangle.Top; 
 
 //获取父母pos 
 HtmlElement tempEl = el.OffsetParent; 
 while（tempEl！= null）
 {
 yPos + = tempEl.OffsetRectangle.Top; 
 tempEl = tempEl.OffsetParent; 
} 
 
返回yPos; 
} 
  

然后在以下位置使用：

  //现在滚动到那个元素
 webBrowser1.Document.Window.ScrollTo（x，y）; 
  

完成！

I was wondering if its possible to get the absolute position of specific HTML element I have loaded in webbrowser control with C#.

I tried almost all of the options that .Net provides.. none of them give me the correct position. all of them give me 0 for Y coordinate.. the element is definitely is not in 0..

does anybody have any solution or idea to solve this?

解决方案

here is the solution I got so far:

// set the size of our web browser to be the same size as the image int width, height; width = webBrowser1.Document.Images[0].ClientRectangle.Width; height = webBrowser1.Document.Images[0].ClientRectangle.Height;

webBrowser1.Width = width;
webBrowser1.Height = height;

//scroll vertically to that element
webBrowser1.Document.Images[0].OffsetParent.ScrollIntoView(true);

//calculate x, y offset of the element
int x = webBrowser1.Document.Images[s].OffsetRectangle.Left + 
webBrowser1.Document.Images[s].OffsetParent.OffsetRectangle.Left + 
webBrowser1.Document.Images[s].OffsetParent.OffsetParent.OffsetRectangle.Left+
webBrowser1.Document.Images[s].OffsetParent.OffsetParent.OffsetParent.OffsetRectangle.Left+
webBrowser1.Document.Images[s].OffsetParent.OffsetParent.OffsetParent.OffsetParent.OffsetRectangle.Left;

int y = webBrowser1.Document.GetElementsByTagName("HTML")[0].ScrollTop;

//now scroll to that element
webBrowser1.Document.Window.ScrollTo(x, y);

now this code works perfectly.. but there is an issue with calculating the offsets. I need to calculate the offsetparent of the element then calculate the offsetparent of the offsetparent etc.. I need to do that dynamically not adding it one by one.. I don't know how to do that. any ideas?

EDIT: here is my last and final version and it works with any html element it will find the absolute position of any element I want..

   public int getXoffset(HtmlElement el)
     {
         //get element pos
         int xPos = el.OffsetRectangle.Left;

         //get the parents pos
         HtmlElement tempEl = el.OffsetParent;
         while (tempEl != null)
         {
             xPos += tempEl.OffsetRectangle.Left;
             tempEl = tempEl.OffsetParent;
         }

         return xPos; 
     }  

     public int getYoffset(HtmlElement el)
     {
         //get element pos
         int yPos = el.OffsetRectangle.Top;

         //get the parents pos
         HtmlElement tempEl = el.OffsetParent;
         while (tempEl != null)
         {
             yPos += tempEl.OffsetRectangle.Top;
             tempEl = tempEl.OffsetParent;
         }

         return yPos;
     }

then use the position with:

 //now scroll to that element
 webBrowser1.Document.Window.ScrollTo(x, y);

done!

这篇关于用C＃获取webbrowser控件中HTML元素的绝对位置的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！