C#选取文件夹的对话框

首先要说明一下:

添加引用:   System.Design 

此文件在下面的位置 

C:\Program Files\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\System.Design.dll

有些人说在添加引用的面板中并找不到这个引用.这是由于你的目标框架设置错误

在 解决方案管理器上  右键 "属性" --> 发布 --> 目标框架 修改为 .Net Framework 4.0  (没有那个client  )

这样你再在添加引用面板中就可以找到这个引用了.

添加这两个引用

using System.Windows.Forms;
using System.Windows.Forms.Design;

 

==================新建一个FolderDialog类 ==============
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Windows.Forms.Design;
   public class FolderDialog : FolderNameEditor
    {
        FolderNameEditor.FolderBrowser fDialog = new FolderNameEditor.FolderBrowser();
        public FolderDialog()
        {
        }
        public DialogResult DisplayDialog()
        {
            return DisplayDialog("请选择一个文件夹");
        }
        public DialogResult DisplayDialog(string description)
        {
            fDialog.Description = description;
            return fDialog.ShowDialog();
        }
        public string Path
        {
            get { return fDialog.DirectoryPath; }
        }
        ~FolderDialog() { fDialog.Dispose(); }
    }
--------------调用--------------------
            FolderDialog openFolder = new FolderDialog();
            if (openFolder.DisplayDialog() == DialogResult.OK)
            {
                textBox1.Text = openFolder.Path.ToString();
            }
            else
            {
                textBox1.Text = "你没有选择目录";
            }
            DirectoryInfo dirInfo = new DirectoryInfo(textBox1.Text);
            FileInfo[] files = dirInfo.GetFiles();
            foreach (FileInfo filename in files)
            {
                listBox1.Items.Add(filename);
            }

下面的例子是一个获取文件夹内的所有文件的

using System;
using System.IO;
namespace ConsoleApplication7
{
 /// <summary>
 /// Class1 的摘要说明 
 /// </summary>
 class Class1
 {
  /// <summary>
  /// 应用程序的主入口点 
  /// </summary>
  [STAThread]
  static void Main(string[] args)
  {
   string dirp=@"d:\\d";
   DirectoryInfo mydir = new DirectoryInfo(dirp);
   foreach (FileSystemInfo fsi in mydir.GetFileSystemInfos())
   {
    if (fsi is FileInfo)
    {
     FileInfo fi = (FileInfo)fsi;
     string x=System.IO.Path.GetDirectoryName(fi.FullName);
     Console.WriteLine(x);
     string s=System.IO.Path.GetExtension(fi.FullName);
     string y=System.IO.Path.GetFileNameWithoutExtension(fi.FullName);
     Console.WriteLine(y);
           if(s==".jpg")
           {
           System.IO.File.Copy(fi.FullName,x+@"\oo"+fi.Name); //在原文件名前加上OO
           System.IO.File.Delete(fi.FullName);
           }
    }
    
   }
   Console.WriteLine("成功");
   Console.ReadLine();
  }
 }