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?
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?
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!
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