WinForm 中使用OpenFileDialog

using Microsoft.Win32;

namespace WpfApplication1
{
    class WPFOpenFileDialog
    {
        public void OpenFile()
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();
            openFileDialog.InitialDirectory = "D:"; // 初始化地址
            openFileDialog.Filter = "文本文件|*.txt|PNG|*.png;*.jpg;*.bmp|视频|*.avi|全部|*.*"; //打开文件的格式（每两个“|”为一个单位）
            if (openFileDialog.ShowDialog() == true)
            {
                string path = openFileDialog.FileName;// 打开文件的地址
            }
        }
    }
}