using System;

 using System.Collections.Generic;

 using System.ComponentModel;

 using System.Data;

 using System.Drawing;

 using System.Linq;

 using System.Text;

 using System.Windows.Forms;

 namespace WindowsFormsApplication1

 {

     public partial class Form5 : Form

     {

         public Form5()

         {

             InitializeComponent();

         }

         private void btn_Open_Click(object sender, EventArgs e)

         {

             openFileDialog1.ShowHelp = false;//设置是否显示"帮助"按钮

             openFileDialog1.InitialDirectory = "D:\\";//设置初始目录为D盘

             openFileDialog1.Title = "选择图片";//设置对话框的标题

             openFileDialog1.FileName = "";//设置初始选择的文件名为空

             openFileDialog1.Multiselect = false;//设置对话框为单选

             openFileDialog1.Filter = "PNG图片|*.png|JPG图片|*.jpg|GIF图片|*.gif"; //筛选文件

             if (openFileDialog1.ShowDialog() == DialogResult.OK)

             {

                 txt_Url.Text = System.IO.Path.GetFullPath(openFileDialog1.FileName); //获取文件路径

                 pictureBox1.Image = Image.FromFile(openFileDialog1.FileName);

             }

         }

     }

 }