WINFORM学习手册——对话框

对话框用于弹出提示消息或者获取用户输入,在弹出对话框后,除非关闭,否则不能返回主窗体

打开上一章的项目,将MainForm.cs里面的代码更改为如下:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WinFrom
{
    public class MainForm : Form//继承Form
    {

        private Button MyButton;//创建Button
        public MainForm()
        {
          
            this.FormClosed += CloseDialog;
            MyButton = new Button();//实例化Button
            MyButton.Left = 30;//设置控件离form左边的距离
            MyButton.Top = 130;//设置控件离form上边的距离
            MyButton.Width = 200;//设置控件的宽度
            MyButton.Text = "弹出对话框";//按钮显示名称
            MyButton.Click += ShowMessage;//按钮单机事件
            this.Controls.Add(MyButton);//将控件加入到form中
        }
        /// <summary>
        /// 弹出对话框
        /// </summary>
        /// <param name="sender">出发事件的对象</param>
        /// <param name="e">事件信息</param>
        private void ShowMessage(object sender, EventArgs e)
        {
            MessageBox.Show("这是最简单的弹出框", "弹出对话框");
        }
        /// <summary>
        /// 关闭提示
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void CloseDialog(object sender, EventArgs e)
        {
            //注意提示框的返回值,是DialogResult这个枚举
            if (MessageBox.Show("是否关闭窗口", "提示信息", MessageBoxButtons.YesNo)==DialogResult.No)
            {
                ((System.ComponentModel.CancelEventArgs)e).Cancel = true;
            }
        }


    }
}

执行:

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posted @ 2014-01-05 19:24  争世不悔  阅读(441)  评论(0编辑  收藏  举报