C# 打開對話框實例（詳）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace TestFile
{
    public partial class Form1 : Form
    {
        OpenFileDialog ofd;
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            ofd = new OpenFileDialog();
            ofd.InitialDirectory = "";  //對話框打開初始目錄
            ofd.Filter = "文本文件(*.txt)|*.txt|所有文件(*.*)|*.*";   // Filter,FilterIndex一定要寫在ShowDialog()之前,否則無效
            ofd.FilterIndex = 1;
            ofd.FileName = "abc";   // 設置一個包含在文件對話框中選定的文件名的字符串,查找文件名爲abc
            ofd.CheckFileExists = true;  // 在對話框返回之前，檢查指定路徑是否存在,默認爲true
            ofd.InitialDirectory = "c://";//對話框的初始目錄
            ofd.ShowDialog();
            String strOpenPath = ofd.FileName;  //關閉文件對話框之後，獲取用戶選擇的完整路徑名
            Console.WriteLine(strOpenPath);   
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                if (ofd.FileName != "")
                {
                    MessageBox.Show("你選擇了" + ofd.FileName);
                }
            }

        }

 

    }
}