截图
1<xmp>
2using System;
3using System.Drawing;
4using System.Collections;
5using System.ComponentModel;
6using System.Windows.Forms;
7using System.Data;
8using System.IO;
9using System.Net;
10using System.Threading;
11namespace DownLoad
12{
13/// <summary>
14/// Form1 的摘要说明。
15/// </summary>
16public class Form1 : System.Windows.Forms.Form
17{
18private System.Windows.Forms.Label label1;
19private System.Windows.Forms.Label label2;
20private System.Windows.Forms.TextBox txtURI;
21private System.Windows.Forms.TextBox txtPath;
22private System.Windows.Forms.Button btnSelect;
23private System.Windows.Forms.Button btnDownLoad;
24private System.Windows.Forms.StatusBar stBar;
25private System.Windows.Forms.FolderBrowserDialog folderBD;
26//使用WebClient的方法以实现文件的下载
27private WebClient client=new WebClient();
28/// <summary>
29/// 必需的设计器变量。
30/// </summary>
31private System.ComponentModel.Container components = null;
32
33public Form1()
34{
35//
36// Windows 窗体设计器支持所必需的
37//
38InitializeComponent();
39
40//
41// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
42//
43}
44
45/// <summary>
46/// 清理所有正在使用的资源。
47/// </summary>
48protected override void Dispose( bool disposing )
49{
50if( disposing )
51{
52if (components != null)
53{
54components.Dispose();
55}
56}
57base.Dispose( disposing );
58}
59
60#region Windows 窗体设计器生成的代码
61/// <summary>
62/// 设计器支持所需的方法 - 不要使用代码编辑器修改
63/// 此方法的内容。
64/// </summary>
65private void InitializeComponent()
66{
67this.label1 = new System.Windows.Forms.Label();
68this.label2 = new System.Windows.Forms.Label();
69this.txtURI = new System.Windows.Forms.TextBox();
70this.txtPath = new System.Windows.Forms.TextBox();
71this.folderBD = new System.Windows.Forms.FolderBrowserDialog();
72this.btnSelect = new System.Windows.Forms.Button();
73this.btnDownLoad = new System.Windows.Forms.Button();
74this.stBar = new System.Windows.Forms.StatusBar();
75this.SuspendLayout();
76//
77// label1
78//
79this.label1.Location = new System.Drawing.Point(8, 24);
80this.label1.Name = "label1";
81this.label1.Size = new System.Drawing.Size(96, 23);
82this.label1.TabIndex = 0;
83this.label1.Text = "下载文件的URI:";
84//
85// label2
86//
87this.label2.Location = new System.Drawing.Point(16, 64);
88this.label2.Name = "label2";
89this.label2.Size = new System.Drawing.Size(88, 23);
90this.label2.TabIndex = 1;
91this.label2.Text = "本地保存路径:";
92//
93// txtURI
94//
95this.txtURI.Location = new System.Drawing.Point(112, 25);
96this.txtURI.Name = "txtURI";
97this.txtURI.Size = new System.Drawing.Size(208, 21);
98this.txtURI.TabIndex = 2;
99this.txtURI.Text = "";
100//
101// txtPath
102//
103this.txtPath.Location = new System.Drawing.Point(112, 65);
104this.txtPath.Name = "txtPath";
105this.txtPath.Size = new System.Drawing.Size(208, 21);
106this.txtPath.TabIndex = 3;
107this.txtPath.Text = "";
108//
109// btnSelect
110//
111this.btnSelect.Location = new System.Drawing.Point(328, 64);
112this.btnSelect.Name = "btnSelect";
113this.btnSelect.TabIndex = 4;
114this.btnSelect.Text = "选择路径...";
115this.btnSelect.Click += new System.EventHandler(this.btnSelect_Click);
116//
117// btnDownLoad
118//
119this.btnDownLoad.Location = new System.Drawing.Point(112, 104);
120this.btnDownLoad.Name = "btnDownLoad";
121this.btnDownLoad.TabIndex = 5;
122this.btnDownLoad.Text = "下载";
123this.btnDownLoad.Click += new System.EventHandler(this.btnDownLoad_Click);
124//
125// stBar
126//
127this.stBar.Location = new System.Drawing.Point(0, 184);
128this.stBar.Name = "stBar";
129this.stBar.Size = new System.Drawing.Size(424, 22);
130this.stBar.TabIndex = 6;
131//
132// Form1
133//
134this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
135this.ClientSize = new System.Drawing.Size(424, 206);
136this.Controls.Add(this.stBar);
137this.Controls.Add(this.btnDownLoad);
138this.Controls.Add(this.btnSelect);
139this.Controls.Add(this.txtPath);
140this.Controls.Add(this.txtURI);
141this.Controls.Add(this.label2);
142this.Controls.Add(this.label1);
143this.Name = "Form1";
144this.Text = "Form1";
145this.ResumeLayout(false);
146
147}
148#endregion
149
150/// <summary>
151/// 应用程序的主入口点。
152/// </summary>
153[STAThread]
154static void Main()
155{
156Application.Run(new Form1());
157}
158
159private void btnSelect_Click(object sender, System.EventArgs e)
160{
161if(folderBD.ShowDialog()==DialogResult.Cancel)
162{
163return;
164}
165txtPath.Text=folderBD.SelectedPath;
166}
167
168private void btnDownLoad_Click(object sender, System.EventArgs e)
169{
170//开启线程,以改善用户体验.
171Thread th=new Thread(new ThreadStart(StartDownLoad));
172//th.Name="New DownLoad";
173th.Start();
174}
175private void StartDownLoad()
176{
177string url=string.Empty;
178string fileName=string.Empty;
179int n=0;
180string path=string.Empty;
181
182btnDownLoad.Enabled=false;
183url=txtURI.Text;
184n=url.LastIndexOf('/');
185fileName=url.Substring(n+1);
186path=txtPath.Text+" \\\"+fileName ;
187
188try
189{
190WebRequest request=WebRequest.Create(url);
191}
192catch(WebException ex)
193{
194MessageBox.Show(ex.Message,"Error");
195}
196
197try
198{
199stBar.Text="开始下载文件...";
200client.DownloadFile(url,path);
201stBar.Text="下载完毕,文件已经保存到"+path.ToString();
202}
203catch(WebException ex)
204{
205MessageBox.Show(ex.Message,"Error");
206stBar.Text=string.Empty;
207}
208finally
209{
210btnDownLoad.Enabled=true;
211}
212}
213}
214}
215
216</xmp>