C#在Winform中实现弹出一个消息窗口过3秒自动关闭

喜欢ヅ旅行 2023-02-16 09:27 10阅读 0赞

### C\#在Winform中实现弹出一个消息窗口过3秒自动关闭 ###

*  背景
 *  代码实现
 *  调用示例

# 背景 #

在Winform应用程序开发中，很多时候我们需要弹出一个消息提示（模式的），又希望不用自己手动去关闭，在这种场景下我们可以开发一个超时消息提示框类，然后进行调用。

# 代码实现 #

具体代码封装如下：  
MessageBoxTimeout.cs

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Windows.Forms;
    using System.Runtime.InteropServices;
    
    namespace Wongoing.Basic
    { 
        /// <summary>
        /// 自动超时消息提示框
        /// </summary>
        public class MessageBoxTimeOut
        { 
            /// <summary>
            /// 标题
            /// </summary>
            private static string _caption;
    
            /// <summary>
            /// 显示消息框
            /// </summary>
            /// <param name="text">消息内容</param>
            /// <param name="caption">标题</param>
            /// <param name="timeout">超时时间，单位：毫秒</param>
            public static void Show(string text, string caption, int timeout)
            { 
                _caption = caption;
                StartTimer(timeout);
                MessageBox.Show(text, caption);
            }
            /// <summary>
            /// 显示消息框
            /// </summary>
            /// <param name="text">消息内容</param>
            /// <param name="caption">标题</param>
            /// <param name="timeout">超时时间，单位：毫秒</param>
            /// <param name="buttons">消息框上的按钮</param>
            public static void Show(string text, string caption, int timeout, MessageBoxButtons buttons)
            { 
                _caption = caption;
                StartTimer(timeout);
                MessageBox.Show(text, caption, buttons);
            }
            /// <summary>
            /// 显示消息框
            /// </summary>
            /// <param name="text">消息内容</param>
            /// <param name="caption">标题</param>
            /// <param name="timeout">超时时间，单位：毫秒</param>
            /// <param name="buttons">消息框上的按钮</param>
            /// <param name="icon">消息框上的图标</param>
            public static void Show(string text, string caption, int timeout, MessageBoxButtons buttons, MessageBoxIcon icon)
            { 
                _caption = caption;
                StartTimer(timeout);
                MessageBox.Show(text, caption, buttons, icon);
            }
            /// <summary>
            /// 显示消息框
            /// </summary>
            /// <param name="owner">消息框所有者</param>
            /// <param name="text">消息内容</param>
            /// <param name="caption">标题</param>
            /// <param name="timeout">超时时间，单位：毫秒</param>
            public static void Show(IWin32Window owner, string text, string caption, int timeout)
            { 
                _caption = caption;
                StartTimer(timeout);
                MessageBox.Show(owner, text, caption);
            }
            /// <summary>
            /// 显示消息框
            /// </summary>
            /// <param name="owner">消息框所有者</param>
            /// <param name="text">消息内容</param>
            /// <param name="caption">标题</param>
            /// <param name="timeout">超时时间，单位：毫秒</param>
            /// <param name="buttons">消息框上的按钮</param>
            public static void Show(IWin32Window owner, string text, string caption, int timeout, MessageBoxButtons buttons)
            { 
                _caption = caption;
                StartTimer(timeout);
                MessageBox.Show(owner, text, caption, buttons);
            }
            /// <summary>
            /// 显示消息框
            /// </summary>
            /// <param name="owner">消息框所有者</param>
            /// <param name="text">消息内容</param>
            /// <param name="caption">标题</param>
            /// <param name="timeout">超时时间，单位：毫秒</param>
            /// <param name="buttons">消息框上的按钮</param>
            /// <param name="icon">消息框上的图标</param>
            public static void Show(IWin32Window owner, string text, string caption, int timeout, MessageBoxButtons buttons, MessageBoxIcon icon)
            { 
                _caption = caption;
                StartTimer(timeout);
                MessageBox.Show(owner, text, caption, buttons, icon);
            }
    
            private static void StartTimer(int interval)
            { 
                Timer timer = new Timer();
                timer.Interval = interval;
                timer.Tick += new EventHandler(Timer_Tick);
                timer.Enabled = true;
            }
    
            private static void Timer_Tick(object sender, EventArgs e)
            { 
                KillMessageBox();
                //停止计时器
                ((Timer)sender).Enabled = false;
            }
    
            [DllImport("user32.dll", EntryPoint = "FindWindow", CharSet = CharSet.Auto)]
            private extern static IntPtr FindWindow(string lpClassName, string lpWindowName);
    
            [DllImport("user32.dll", CharSet = CharSet.Auto)]
            private extern static int PostMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);
    
            private const int WM_CLOSE = 0x10;
    
            private static void KillMessageBox()
            { 
                //查找MessageBox的弹出窗口,注意对应标题
                IntPtr ptr = FindWindow(null, _caption);
                if (ptr != IntPtr.Zero)
                { 
                    //查找到窗口则关闭
                    PostMessage(ptr, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
                }
            }
        }
    }

# 调用示例 #

简单的调用示例如下：

MessageBoxTimeOut.Show("你好，我是超时消息框，3秒后自动关闭！","提示", 3000);