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   源码介绍

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using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;
namespace Network
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.TextBox textBox2;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.GroupBox groupBox2;
		private System.Windows.Forms.Button button3;
		private System.Windows.Forms.Button button4;
		private System.Windows.Forms.TextBox textBox3;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.TextBox textBox4;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.OpenFileDialog openFileDialog1;
		private System.Windows.Forms.SaveFileDialog saveFileDialog1;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows 窗体设计器生成的代码
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.label2 = new System.Windows.Forms.Label();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.label1 = new System.Windows.Forms.Label();
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.groupBox2 = new System.Windows.Forms.GroupBox();
			this.button3 = new System.Windows.Forms.Button();
			this.button4 = new System.Windows.Forms.Button();
			this.textBox3 = new System.Windows.Forms.TextBox();
			this.label3 = new System.Windows.Forms.Label();
			this.textBox4 = new System.Windows.Forms.TextBox();
			this.label4 = new System.Windows.Forms.Label();
			this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
			this.saveFileDialog1 = new System.Windows.Forms.SaveFileDialog();
			this.groupBox1.SuspendLayout();
			this.groupBox2.SuspendLayout();
			this.SuspendLayout();
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.Add(this.button2);
			this.groupBox1.Controls.Add(this.button1);
			this.groupBox1.Controls.Add(this.textBox2);
			this.groupBox1.Controls.Add(this.label2);
			this.groupBox1.Controls.Add(this.textBox1);
			this.groupBox1.Controls.Add(this.label1);
			this.groupBox1.Location = new System.Drawing.Point(8, 8);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(328, 120);
			this.groupBox1.TabIndex = 0;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "下载文件";
			// 
			// textBox2
			// 
			this.textBox2.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
			this.textBox2.Location = new System.Drawing.Point(16, 88);
			this.textBox2.Name = "textBox2";
			this.textBox2.Size = new System.Drawing.Size(296, 21);
			this.textBox2.TabIndex = 7;
			this.textBox2.Text = "";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(16, 64);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(72, 16);
			this.label2.TabIndex = 6;
			this.label2.Text = "下载网址：";
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(16, 40);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(296, 21);
			this.textBox1.TabIndex = 5;
			this.textBox1.Text = "";
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(16, 24);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(80, 16);
			this.label1.TabIndex = 4;
			this.label1.Text = "保存文件名：";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(232, 16);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(80, 23);
			this.button1.TabIndex = 8;
			this.button1.Text = "浏览";
			this.button1.Click  = new System.EventHandler(this.button1_Click_1);
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(232, 64);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(80, 23);
			this.button2.TabIndex = 9;
			this.button2.Text = "下载";
			this.button2.Click  = new System.EventHandler(this.button2_Click);
			// 
			// groupBox2
			// 
			this.groupBox2.Controls.Add(this.button3);
			this.groupBox2.Controls.Add(this.button4);
			this.groupBox2.Controls.Add(this.textBox3);
			this.groupBox2.Controls.Add(this.label3);
			this.groupBox2.Controls.Add(this.textBox4);
			this.groupBox2.Controls.Add(this.label4);
			this.groupBox2.Location = new System.Drawing.Point(8, 136);
			this.groupBox2.Name = "groupBox2";
			this.groupBox2.Size = new System.Drawing.Size(328, 120);
			this.groupBox2.TabIndex = 1;
			this.groupBox2.TabStop = false;
			this.groupBox2.Text = "上载文件";
			// 
			// button3
			// 
			this.button3.Location = new System.Drawing.Point(232, 64);
			this.button3.Name = "button3";
			this.button3.Size = new System.Drawing.Size(80, 23);
			this.button3.TabIndex = 9;
			this.button3.Text = "上载";
			this.button3.Click  = new System.EventHandler(this.button3_Click);
			// 
			// button4
			// 
			this.button4.Location = new System.Drawing.Point(232, 16);
			this.button4.Name = "button4";
			this.button4.Size = new System.Drawing.Size(80, 23);
			this.button4.TabIndex = 8;
			this.button4.Text = "浏览";
			this.button4.Click  = new System.EventHandler(this.button4_Click);
			// 
			// textBox3
			// 
			this.textBox3.BackColor = System.Drawing.SystemColors.ActiveCaptionText;
			this.textBox3.Location = new System.Drawing.Point(16, 40);
			this.textBox3.Name = "textBox3";
			this.textBox3.Size = new System.Drawing.Size(296, 21);
			this.textBox3.TabIndex = 7;
			this.textBox3.Text = "";
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(16, 64);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(72, 16);
			this.label3.TabIndex = 6;
			this.label3.Text = "上载网址：";
			// 
			// textBox4
			// 
			this.textBox4.Location = new System.Drawing.Point(16, 88);
			this.textBox4.Name = "textBox4";
			this.textBox4.Size = new System.Drawing.Size(296, 21);
			this.textBox4.TabIndex = 5;
			this.textBox4.Text = "";
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(16, 24);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(80, 16);
			this.label4.TabIndex = 4;
			this.label4.Text = "上载文件名：";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(344, 262);
			this.Controls.Add(this.groupBox2);
			this.Controls.Add(this.groupBox1);
			this.MaximizeBox = false;
			this.Name = "Form1";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "演示上下载文件";
			this.groupBox1.ResumeLayout(false);
			this.groupBox2.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		
		private void button1_Click_1(object sender, System.EventArgs e)
		{//浏览保存文件
			if(this.saveFileDialog1.ShowDialog()==DialogResult.OK)
			{
				this.textBox1.Text=this.saveFileDialog1.FileName;
			}		
		}
		private void button4_Click(object sender, System.EventArgs e)
		{//浏览上载文件
			if(this.openFileDialog1.ShowDialog()==DialogResult.OK)
			{
				this.textBox3.Text=this.openFileDialog1.FileName;
			}		
		}

		private void button2_Click(object sender, System.EventArgs e)
		{//下载文件
			if(this.textBox1.Text==""|this.textBox2.Text=="")
				return;
			WebClient MyClient=new WebClient();
			string URL=this.textBox2.Text;
			string SaveFileName=this.textBox1.Text;
			try
			{
				MyClient.DownloadFile(URL , SaveFileName);
				MessageBox.Show("文件下载成功！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
			}
			catch(Exception Err)
			{
				MessageBox.Show("文件下载失败！错误是：" Err.Message,"信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
			}			
		}

		private void button3_Click(object sender, System.EventArgs e)
		{//上载文件
			if(this.textBox3.Text==""|this.textBox4.Text=="")
				return;
			WebClient MyClient=new WebClient();
			string URL=this.textBox3.Text;
			string FileName=this.textBox4.Text;
			byte[] MyResponseArray=null;
			try
			{
				MyResponseArray = MyClient.UploadFile(URL,FileName);
				MessageBox.Show("文件上载成功！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
			}
			catch(Exception Err)
			{
				MessageBox.Show("文件上载失败！错误是：" Err.Message,"信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
			}
			finally
			{
				MessageBox.Show("\n服务器的回复为: \n" System.Text.Encoding.ASCII.GetString(MyResponseArray));
			}
		}
	}
}