form1.cs

Visual C#2005程序设计教程

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

namespace exp14
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this.Text = "异常捕获及处理";
            label1.Text = "源 文 件";
            label2.Text = "目标文件夹";
            label3.Text = "目标文件名";
            label4.Visible = false;
            button1.Text = "浏览...";
            button2.Text = "复制";
            button3.Text = "浏览...";
            button4.Text = "退出";
            textBox3.Text = "1.txt";
        }

        private void button1_Click(object sender, EventArgs e)
        {
            
            openFileDialog1.InitialDirectory = "D:\\C#";
            openFileDialog1.FileName = "";
            openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
            openFileDialog1.FilterIndex = 1;
            //openFileDialog1.RestoreDirectory = false ;
            
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                textBox1.Text = openFileDialog1.FileName;               
            }
        }

        
        private void button2_Click(object sender, EventArgs e)
        {
            label4.Visible = true;
            try
            {
                string str = textBox2.Text;
                str = str.Substring((str.Length) -1,1);
                if (str == "\\")
                {
                    File.Copy(textBox1.Text, textBox2.Text + textBox3.Text);
                }
                else
                {
                    File.Copy(textBox1.Text, textBox2.Text +"\\"+ textBox3.Text);
                }                
                label4.Text = "文件复制成功！";
            }
            catch (FileNotFoundException)
            {
                label4.Text = "文件不存在！";
            }
            catch (ArgumentException)
            {
                label4.Text = "参数错误！";
            }
            catch (IOException)
            {
                label4.Text = "缺少目标文件名、文件夹不存在或目标文件已存在";
            }
                catch
            {
                label4.Text = "出现其他错误";
            }
            finally
            {
                MessageBox.Show("感谢使用本软件!", "程序结束", MessageBoxButtons.OK, MessageBoxIcon.Exclamation); 
            }
        }
        private void button3_Click(object sender, EventArgs e)
        {
           
            if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
            {
                textBox2.Text = folderBrowserDialog1.SelectedPath ;
            }
        }

        private void button4_Click(object sender, EventArgs e)
        {
            this.Close();
        }

    }
}