MessageBox中的粗体文本

Question

如何MessageBox.Show使用C#在显示的对话框中以粗体显示文本？

Answer 1

有可能,消息框是一个常规窗口,可以像任何其他窗口一样混乱.但是,这样做的代码有点粗糙.在项目中添加一个新类并粘贴此代码:

using System;
using System.Text;
using System.Drawing;
using System.Windows.Forms;
using System.Runtime.InteropServices;

class BoldMessageBox : IDisposable {
  private int mTries = 0;
  private Form mOwner;
  private Font mFont;

  public BoldMessageBox(Form owner) {
    mOwner = owner;
    owner.BeginInvoke(new MethodInvoker(findDialog));
  }

  private void findDialog() {
    // Enumerate windows to find the message box
    if (mTries < 0) return;
    EnumThreadWndProc callback = new EnumThreadWndProc(checkWindow);
    if (EnumThreadWindows(GetCurrentThreadId(), callback, IntPtr.Zero)) {
      if (++mTries < 10) mOwner.BeginInvoke(new MethodInvoker(findDialog));
    }
  }
  private bool checkWindow(IntPtr hWnd, IntPtr lp) {
    // Checks if <hWnd> is a dialog
    StringBuilder sb = new StringBuilder(260);
    GetClassName(hWnd, sb, sb.Capacity);
    if (sb.ToString() != "#32770") return true;
    // Got it, get the STATIC control that displays the text
    IntPtr hText = GetDlgItem(hWnd, 0xffff);
    if (hText != IntPtr.Zero) {
      // Get the current font
      IntPtr hFont = SendMessage(hText, WM_GETFONT, IntPtr.Zero, IntPtr.Zero);
      Font font = Font.FromHfont(hFont);
      // And make it bold (note the size change to keep enough space!!)
      mFont = new Font(font.FontFamily, font.SizeInPoints - 1f, FontStyle.Bold);
      SendMessage(hText, WM_SETFONT, mFont.ToHfont(), (IntPtr)1);
    }
    // Done
    return false;
  }
  public void Dispose() {
    mTries = -1;
    mOwner = null;
    if (mFont != null) mFont.Dispose();
  }

  // P/Invoke declarations
  private const int WM_SETFONT = 0x30;
  private const int WM_GETFONT = 0x31;
  private delegate bool EnumThreadWndProc(IntPtr hWnd, IntPtr lp);
  [DllImport("user32.dll")]
  private static extern bool EnumThreadWindows(int tid, EnumThreadWndProc callback, IntPtr lp);
  [DllImport("kernel32.dll")]
  private static extern int GetCurrentThreadId();
  [DllImport("user32.dll")]
  private static extern int GetClassName(IntPtr hWnd, StringBuilder buffer, int buflen);
  [DllImport("user32.dll")]
  private static extern IntPtr GetDlgItem(IntPtr hWnd, int item);
  [DllImport("user32.dll")]
  private static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wp, IntPtr lp);
}

并像这样使用它:

private void button1_Click(object sender, EventArgs e) {
  using (new BoldMessageBox(this)) {
    MessageBox.Show("Nobugz waz here");
  }
}

这种方法存在一个缺陷.在使字体变为粗体之后,文本仍必须适合为文本保留的消息框的静态控件.这要求我让字体变小.您可能需要调整此值.

Answer 2

你不能.这是API MessageBoxEx的包装器.

创建自己的自定义消息框来执行此操作.

您可以按照本教程,作为如何实现一个示例.

创建此类表单的基本步骤:

1. 创建一个新表单
2. 添加标签和两个按钮
3. 将标签字体设置为粗体
4. 向两个按钮添加处理程序,关闭表单并设置按下按钮的某个属性.

Answer 3

没有可以做的。你必须建造自己的盒子。我假设这是WinForms，如果是ASP.NET我没有资格回答。