C# 弹出框DialogForm

1.新建一个MyMessageBoxForm窗体，在界面中添加确认和取消两个按钮。

复制代码

using System;
using System.Drawing;
using System.Windows.Forms;

namespace WindowsFormsApplication3
{
    public partial class MyMessageBoxForm : Form
    {
        [System.Runtime.InteropServices.DllImport("user32")]
        private static extern IntPtr GetActiveWindow();//获取当前窗体的活动状态
        String msg = "";

        public delegate void TextEventHandler(string strText);
        public TextEventHandler TextHandler;
        public MyMessageBoxForm(String msg)
        {
            InitializeComponent();

            // 设置窗体为无边框样式
            this.FormBorderStyle = FormBorderStyle.None;

            // 设置透明键颜色（这里使用洋红色，你可以选择任何不常用的颜色）
            this.BackColor = Color.Magenta;
            this.TransparencyKey = Color.Magenta;
            this.msg = msg;
        }

        private void MyMessageBoxForm_Load(object sender, EventArgs e)
        {
            //要显示的消息
           Console.WriteLine(msg);
        }

       private void btn_ensure_Click(object sender, EventArgs e)
		{
   			if (null != TextHandler)
   			 {
    			//要返回的结果数据
      			String rsultData = "我是结果";
       			TextHandler.Invoke(rsultData);
      			DialogResult = DialogResult.OK;
 			}
		}

        private void btn_cancl_Click(object sender, EventArgs e)
        {
            TextHandler.Invoke(null);
            DialogResult = DialogResult.Cancel;
        }
    }
    public static class MyMessageBoxDialog
    {
        public static DialogResult Show(String message, out string strText)
        {
            string strTemp = string.Empty;

            MyMessageBoxForm inputDialog = new MyMessageBoxForm(message);
            inputDialog.TextHandler = (str) => { strTemp = str; };

            DialogResult result = inputDialog.ShowDialog();
            strText = strTemp;

            return result;
        }
    }
}

2.调用

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string result = string.Empty;
DialogResult dr = MyMessageBoxDialog.Show("aaaaa", out result);
if (dr == DialogResult.OK)
{
    Console.WriteLine("DialogResult"+ dr);
    Console.WriteLine("result = " + result);
}
else {
    Console.WriteLine("DialogResult" + dr);
}