c# – 获取屏幕边缘和网页之间的距离

2019年8月4日 210次阅读

好的,请考虑这张图片.

I develop an IE extension in c# and I would :
  - the distance in red, between top of screen and top of `visible webpage`
  - the distance in red between left of screen and left of `visible webpage`
  - the width/heigth of the visible webpage

当然考虑到我有整个屏幕尺寸.如果我有红色和黑色,我可以计算绿色.

有什么意义？

我有一千个屏幕坐标(X,Y),我必须相对于网页计算坐标.

Example : 

Considering
  Screen size : 1200 * 800
  Webpage size : 400*300
  Red distance between left screen border and left webpage border  : 200
  Red distance between top screen border and top webpage border  : 300

So my coordinates screen => relative webpage becomes :
  ( 100, 100 ) => OUTSIDE WEBPAGE( ignored )
  ( 1100, 650 ) => OUTSIDE WEBPAGE ( ignored )
  ( 200, 300 ) => ( 0,0 )
  ( 250, 400 ) => ( 50, 100 )

实际上我有这个代码,这是继承自AddinExpress.IE.ADXIEModule,thetoolbarObj是我添加到InternetExplorer的工具栏.所以我可以在它上面使用pointToScreen,我不是我需要的,但工具栏的左角不是我需要的,我需要网页的左角.

public void getUtilsDimension()
{
    Rectangle resolution = Screen.PrimaryScreen.Bounds;
    Int32 screenWidth = resolution.Width;
    Int32 screenHeight = resolution.Height;

    AddinExpress.IE.ADXIEToolBarItem toolbarItem = this.ToolBars[0];
    AddinExpress.IE.ADXIEToolbar toolbarObj = toolbarItem.ToolBarObj;
    Point leftCornerWebPage = toolbarObj.PointToScreen(new Point(0, 0));
    Int32 toolbarHeight = toolbarObj.Height;
    Int32 toolbarWidth = toolbarObj.Width;

    Debug.WriteLine("Largeur écran : " + screenWidth);
    Debug.WriteLine("Hauteur écran : " + screenHeight);
    Debug.WriteLine("LeftCornerX : " + leftCornerWebPage.X);
    Debug.WriteLine("LeftCornerY : " + leftCornerWebPage.Y);
    Debug.WriteLine("toolbarHeight : " + toolbarHeight);
    Debug.WriteLine("toolbarWidth : " + toolbarWidth);

}

这就是我实际得到的,屏幕是1600 * 900,po​​intToScreen返回红叉的坐标(484,158).但我需要蓝色十字的坐标,作为可见网页的宽度和高度.我知道我可以用Jquery中的$(窗口)来获取它,但我不知道如何使用c#.

我可以使用this.HTMLDocument访问HTLMDocument(typeof mshtml.HTMLDocument),遗憾的是,在HTMLDocument对象上,pointToScreen不可用.

编辑：它是第一个截图的铬,但当然应该是IE浏览器

更新08/12

好的,我有可见网页的宽度和高度(我的屏幕截图上的黑线)
唯一缺少的是我的截图2上蓝色十字的坐标

var heightVisibleWebPage = HTMLDocument.documentElement.offsetHeight;
var widthVisibleWebPage = HTMLDocument.documentElement.offsetWidth;

对于赏金,我需要蓝十字的精确坐标.不管怎样.它应该工作无论Internet Explorer版本,收藏夹/工具/命令/状态栏显示与否.

更新08/12 HTMLDocument

HTMLDocument来自AddinExpress,它不是System.Windows.Forms.HtmlDocument

public mshtml.HTMLDocument HTMLDocument
{
    get
    {
        return (this.HTMLDocumentObj as mshtml.HTMLDocument);
    }

}

他的父HTMLDocument.parentWindows是一个IHTMLWindow2对象

HTMLDocumentObj是其成员

public class ADXIEModule : Component, IRemoteModule2, IRemoteModule, IObjectWithSite, IWin32Window
{
     ...
    //
    // Résumé :
    //     Gets the automation object (a COM object) of the active document, if any.
    //
    // Notes :
    //     When the active document is an HTML page, this property provides access to
    //     the contents of the HTML Document Object Model (DOM). Specifically, it returns
    //     an HTMLDocument object reference. The HTMLDocument object is functionally
    //     equivalent to the HTML document object used in HTML page script. It supports
    //     all the properties and methods necessary to access the entire contents of
    //     the active HTML document.
    //     The HTMLDocument object can be used through the IHTMLDocument interface,
    //     the IHTMLDocument2 interface, and the IHTMLDocument3 interface.
    //     When other document types are active, such as a Microsoft Word document,
    //     this property returns the document automation object of that document. For
    //     Word documents, this is the Document object.
    [Browsable(false)]
    public object HTMLDocumentObj { get; }

    ...

}

请为社区解释-1时;)

最佳答案 这些是步骤：

>使用EnumWindows()api查找Internet Explorer窗口句柄.类名是IEFrame
>使用EnumChildWindows()api遍历所有子窗口.类名是Internet Explorer_Server
>使用GetWindowRect()api查找x,y坐标

码：

[DllImport("user32.dll")]
public static extern int EnumWindows(EnumWindowsCallback lpEnumFunc, int lParam);

[DllImport("user32.dll")]
public static extern int EnumChildWindows(IntPtr hWndParent, EnumWindowsCallback lpEnumFunc, int lParam);

public delegate bool EnumWindowsCallback(IntPtr hwnd, int lParam);

[DllImport("user32.dll")]
public static extern void GetClassName(IntPtr hwnd, StringBuilder s, int nMaxCount);

[StructLayout(LayoutKind.Sequential)]
public struct RECT
{
    public int Left;        // x position of upper-left corner
    public int Top;         // y position of upper-left corner
    public int Right;       // x position of lower-right corner
    public int Bottom;      // y position of lower-right corner
}

[DllImport("user32.dll")]
static extern bool GetWindowRect(IntPtr hwnd, out RECT lpRect);

private IntPtr ieHandle, ieChildHandle;

private void GetWindows()
{
    EnumWindows(Callback, 0);
}

private bool Callback(IntPtr hwnd, int lParam)
{
    StringBuilder className = new StringBuilder(256);

    GetClassName(hwnd, className, className.Capacity);

    if (className.ToString().Equals("IEFrame"))
    {
        ieHandle = hwnd;

        return false;
    }

    return true; //continue enumeration
}

private void GetChildWindows()
{
    if (ieHandle != IntPtr.Zero)
    {
        EnumChildWindows(ieHandle, CallbackChild, 0);
    }
}

private bool CallbackChild(IntPtr hwnd, int lParam)
{
    StringBuilder className = new StringBuilder(256);

    GetClassName(hwnd, className, className.Capacity);

    if (className.ToString().Equals("Internet Explorer_Server"))
    {
        ieChildHandle = hwnd;

        return false;
    }

    return true; //continue enumeration
}

要获得坐标：

GetWindows();
GetChildWindows();

if (ieChildHandle != IntPtr.Zero)
{
    RECT rect;

    if (GetWindowRect(ieChildHandle, out rect))
    {
        //rect.Left, rect.Top
    }

}

ieChildHandle = IntPtr.Zero;
ieHandle = IntPtr.Zero;

测试IE 6,9和11

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