向专家提问：C#如何改变FontDialog的位置（高分）

善缘2022 2009-10-13 01:14:00

我做的一个Winform程序中，用到了FontDialog和ColorDialog，他们默认的位置都是在屏幕的中间，我想改变它的位置，让它随着父窗体的位置而改变，显示在父窗体中间。查了下它本身的属性是没发实现的，网上说调用api,但是不能得到句柄，句柄好像只能再窗体fontDialog1.showDialog（）后才可以得到，但是fontDialog1.ShowDialog()后，必须关闭后后面的代码才会执行，但是关闭后就无法得到了。不知道该如何实现，所以向专家提问，希望帮我看看。给出思路也行，回答者都有分，问题解决者得高分。

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dnfmtzx 2011-10-08

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12楼的方法可以,只是不能移动,被固定在初始位置,即15楼描述的问题.
HookProc中第一句和第二句调换位置就可以了.
即:
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")]
protected override IntPtr HookProc(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam)
{
GetWindowRect(hWnd, ref r);
SetWindowPos(hWnd, (IntPtr)0, Left, Top, 0, 0, SWP_NOSIZE | SWP_NOZORDER);
return base.HookProc(hWnd, msg, wParam, lParam);
}

班门弄武 2011-08-29

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楼主,我仍然遇到这样的问题,我copy代码之后哦发现鼠标移动ColorDialog 出现了很多重贴区域.

gtisxgx 2010-03-20

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都是高手，我来瞻仰下

善缘2022 2009-10-17

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感谢大家的回复，在你们的帮助下问题解决了。解决办法：wuyi8808,特别感谢。

mygisforum 2009-10-13

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好东西 mark

yuanhuiqiao 2009-10-13

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//  一.获得当前活动窗口的句柄

//用一下的API函数获得

[DllImport("user32")]

public static extern IntPtr GetActiveWindow();

[DllImport("user32.dll")]

public static extern IntPtr GetForegroundWindow();



//二.重新声明 IWin32Window 接口

public class WindowWrapper : System.Windows.Forms.IWin32Window

{

    private System.IntPtr _hwnd;

    

    public WindowWrapper(System.IntPtr handle)

    {

        _hwnd = handle;

    }



    public  System.IntPtr Handle

    {

        get { return _hwnd; }

    }

}



//三. 把当前活动的句柄转化成IWin32Window 接口，并Show窗体，这样就可以达到两个不

 //    同线程的窗体粘在一快了。

System.IntPtr IntPart = GetForegroundWindow();

WindowWrapper OwinForm = new WindowWrapper(IntPart);

Form test = new Form();

test.Show(OwinForm);

wuyi8808 2009-10-13

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using System;

using System.Windows.Forms;

using System.Runtime.InteropServices;



class Form1 : Form

{

  Form1()

  {

    Button btn = new Button();

    btn.Parent = this;

    btn.Text   = "Font";

    btn.Click += delegate { new MyFontDialog(50, 80).ShowDialog(); };

  }

  

  [STAThread]

  static void Main()

  {

    Application.Run(new Form1());  

  }

}



class MyFontDialog : FontDialog

{

  const int WM_INITDIALOG = 0x0110;

  const int SWP_NOSIZE    = 0x0001;

  const int SWP_NOZORDER  = 0x0004;



  [DllImport("user32.dll")]

  static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);



  [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")] 

  protected override IntPtr HookProc(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam)

  {

    SetWindowPos(hWnd, (IntPtr)0, Left, Top, 0, 0, SWP_NOSIZE | SWP_NOZORDER);

    return base.HookProc(hWnd, msg, wParam, lParam);

  }

  

  // 窗口的位置

  int Left, Top;

  

  public MyFontDialog(int x, int y)

  {

    Left = x;

    Top  = y;

  }

}

ximi82878 2009-10-13

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都是高手，我来瞻仰下

sohighthesky 2009-10-13

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那两个框那么简单，自己用form做一个就可以了

善缘2022 2009-10-13

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[Quote=引用 2 楼 fengling2001 的回复:]
一.获得当前活动窗口的句柄
用一下的API函数获得
Declare Function GetForegroundWindow Lib "user32" Alias "GetActiveWindow" () As System.IntPtr
二.重新声明 IWin32Window 接口
Public Class WindowWrapper
Implements System.Windows.Forms.IWin32Window
Private _hwnd As System.IntPtr

Public Sub New(ByVal handle As System.IntPtr)
_hwnd = handle
End Sub

Private ReadOnly Property Handle() As System.IntPtr Implements System.Windows.Forms.IWin32Window.Handle
Get
Return _hwnd
End Get
End Property
End Class
三. 把当前活动的句柄转化成IWin32Window 接口，并Show窗体，这样就可以达到两个不
同线程的窗体粘在一快了。
Dim IntPart As System.IntPtr
IntPart = GetForegroundWindow()
Dim OwinForm As WindowWrapper
OwinForm = New WindowWrapper(IntPart)
Form.show(OwinForm )
[/Quote]
VB的代码WindowWrapper 类我转换成C#代码好像有问题，谁能帮我看看，c#代码该如何写，谢谢了。

wuyi8808 2009-10-13

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看看这个有没有帮助：
http://msdn.microsoft.com/zh-cn/library/system.windows.forms.commondialog.hookproc.aspx
.NET Framework 类库
CommonDialog.HookProc 方法

定义要重写的通用对话框挂钩过程，以便向通用对话框添加特定功能。

[SecurityPermissionAttribute(SecurityAction.InheritanceDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]

[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]

protected virtual IntPtr HookProc(

    IntPtr hWnd,

    int msg,

    IntPtr wparam,

    IntPtr lparam

)

参数
hWnd
类型：System.IntPtr
对话框窗口的句柄。

msg
类型：System.Int32
正在接收的消息。

wparam
类型：System.IntPtr
关于消息的附加信息。

lparam
类型：System.IntPtr
关于消息的附加信息。

sxmonsy 2009-10-13

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楼上的VB代码改成C#的就行了

typeof 2009-10-13

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using System;

using System.Drawing;

using System.Windows.Forms;

using System.Runtime.InteropServices;



class FontDialog : System.Windows.Forms.FontDialog

{

  public int   Left     { get { return r.Left    ; } set { r.Left     = value; } }

  public int   Top      { get { return r.Top     ; } set { r.Top      = value; } }

  public int   Width    { get { return r.Width   ; } set { r.Width    = value; } }

  public int   Height   { get { return r.Height  ; } set { r.Height   = value; } }

  public Point Location { get { return r.Location; } set { r.Location = value; } }

  public Size  Size     { get { return r.Size    ; } }



  Rect r;



  const uint SWP_NOSIZE   = 1;

  const uint SWP_NOZORDER = 4;



  [DllImport("user32.dll")]   

  static extern IntPtr GetWindowRect(IntPtr hWnd, ref Rect rect);



  [DllImport("user32.dll")]

  static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);



  [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")]

  protected override IntPtr HookProc(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam)

  {

    SetWindowPos(hWnd, (IntPtr)0, Left, Top, 0, 0, SWP_NOSIZE | SWP_NOZORDER);

    GetWindowRect(hWnd, ref r);

    return base.HookProc(hWnd, msg, wParam, lParam);

  }

}



class Form1 : Form

{

  Form1()

  {

    Button btn = new Button();

    btn.Parent = this;

    btn.Text   = "&Font";

    btn.Click += delegate

    {

      FontDialog fd = new FontDialog();

      fd.Location = new Point(10, 50);

      fd.ShowDialog();

    };

  }



  static void Main()

  {

    Application.Run(new Form1());

  }

}



[StructLayout(LayoutKind.Sequential)]

public struct Rect 

{ 

  public int Left; 

  public int Top; 

  public int Right; 

  public int Bottom;



  public int Width  { get { return Right - Left; } set { Right = Left + value; } }

  public int Height { get { return Bottom - Top; } set { Bottom = Top + value; } }



  public Size Size

  {

    get { return new Size(Width, Height); }

    set { Width = value.Width; Height = value.Height; }

  }



  public Point Location

  {

    get { return new Point(Left, Top); }

    set { Right -= (Left - value.X); Bottom -= (Bottom - value.Y); Left = value.X; Top = value.Y; }

  }



  public override string ToString()

  {

    return string.Format("{{X={0},Y={1},Width={2},Height={3}}}", Left, Top, Width, Height);

  }

}

Taiyangchen 2009-10-13

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楼上的vb都出来了，汗！

fengling2001 2009-10-13

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一.获得当前活动窗口的句柄
用一下的API函数获得
Declare Function GetForegroundWindow Lib "user32" Alias "GetActiveWindow" () As System.IntPtr
二.重新声明 IWin32Window 接口
Public Class WindowWrapper
Implements System.Windows.Forms.IWin32Window
Private _hwnd As System.IntPtr

Public Sub New(ByVal handle As System.IntPtr)
_hwnd = handle
End Sub

Private ReadOnly Property Handle() As System.IntPtr Implements System.Windows.Forms.IWin32Window.Handle
Get
Return _hwnd
End Get
End Property
End Class
三. 把当前活动的句柄转化成IWin32Window 接口，并Show窗体，这样就可以达到两个不
同线程的窗体粘在一快了。
Dim IntPart As System.IntPtr
IntPart = GetForegroundWindow()
Dim OwinForm As WindowWrapper
OwinForm = New WindowWrapper(IntPart)
Form.show(OwinForm )