利用WebClient类向服务器上载文件代码,CSharp代码库,德仔网

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【CSharp】利用WebClient类向服务器上载文件
作者:孟宪会 / 发布于2011/5/3/ 646
.NET 提供了许多上载文件的方法，在Windows Form应用程序中，我们可以使用WebClient类来实现。WebClient类也有两个方法可以上载，UploadFile和OpenWrite方法
<div><!--StartFragment-->using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Net;
using System.Text;
using System.IO;


namespace UploadFile
{
 public class Form1 : System.Windows.Forms.Form
 {
 private System.Windows.Forms.Label label1;
 private System.Windows.Forms.Label label2;
 private System.Windows.Forms.Button button1;
 private System.Windows.Forms.Label label3;
 private System.Windows.Forms.Button button2;
 private System.Windows.Forms.TextBox txtFileName;
 private System.Windows.Forms.TextBox txtServerPath;
 private System.Windows.Forms.LinkLabel linkLabel1;

 private System.ComponentModel.Container components = null;

 public Form1()
 {
 InitializeComponent();
 }
 protected override void Dispose( bool disposing )
 {
 if( disposing )
 {
 if (components != null) 
 {
 components.Dispose();
 }
 }
 base.Dispose( disposing );
 }

 #region Windows Form Designer generated code
 private void InitializeComponent()
 {
 System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
 this.label1 = new System.Windows.Forms.Label();
 this.txtServerPath = new System.Windows.Forms.TextBox();
 this.label2 = new System.Windows.Forms.Label();
 this.button1 = new System.Windows.Forms.Button();
 this.txtFileName = new System.Windows.Forms.TextBox();
 this.label3 = new System.Windows.Forms.Label();
 this.button2 = new System.Windows.Forms.Button();
 this.linkLabel1 = new System.Windows.Forms.LinkLabel();
 this.SuspendLayout();
 // 
 // label1
 // 
 this.label1.ForeColor = System.Drawing.Color.Red;
 this.label1.Location = new System.Drawing.Point(8, 96);
 this.label1.Name = "label1";
 this.label1.Size = new System.Drawing.Size(448, 16);
 this.label1.TabIndex = 0;
 this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
 // 
 // txtServerPath
 // 
 this.txtServerPath.Location = new System.Drawing.Point(128, 8);
 this.txtServerPath.Name = "txtServerPath";
 this.txtServerPath.Size = new System.Drawing.Size(320, 21);
 this.txtServerPath.TabIndex = 1;
 this.txtServerPath.Text = "http://mengxianhui/aspxWeb/Images/";
 // 
 // label2
 // 
 this.label2.AutoSize = true;
 this.label2.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Bold, 
 System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
 this.label2.ForeColor = System.Drawing.Color.Navy;
 this.label2.Location = new System.Drawing.Point(8, 12);
 this.label2.Name = "label2";
 this.label2.Size = new System.Drawing.Size(116, 17);
 this.label2.TabIndex = 2;
 this.label2.Text = "请输入服务器地址：";
 this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
 // 
 // button1
 // 
 this.button1.Location = new System.Drawing.Point(192, 64);
 this.button1.Name = "button1";
 this.button1.TabIndex = 3;
 this.button1.Text = "上载文件";
 this.button1.Click += new System.EventHandler(this.button1_Click);
 this.button1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.button1_MouseDown);
 // 
 // txtFileName
 // 
 this.txtFileName.Location = new System.Drawing.Point(128, 32);
 this.txtFileName.Name = "txtFileName";
 this.txtFileName.Size = new System.Drawing.Size(232, 21);
 this.txtFileName.TabIndex = 4;
 this.txtFileName.Text = "";
 // 
 // label3
 // 
 this.label3.AutoSize = true;
 this.label3.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Bold, 
 System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
 this.label3.ForeColor = System.Drawing.Color.DarkBlue;
 this.label3.Location = new System.Drawing.Point(8, 38);
 this.label3.Name = "label3";
 this.label3.Size = new System.Drawing.Size(116, 17);
 this.label3.TabIndex = 5;
 this.label3.Text = "请输入上传文件名：";
 this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
 // 
 // button2
 // 
 this.button2.Location = new System.Drawing.Point(370, 32);
 this.button2.Name = "button2";
 this.button2.Size = new System.Drawing.Size(80, 23);
 this.button2.TabIndex = 6;
 this.button2.Text = "浏览文件&hellip;";
 this.button2.Click += new System.EventHandler(this.button2_Click);
 // 
 // linkLabel1
 // 
 this.linkLabel1.Location = new System.Drawing.Point(16, 120);
 this.linkLabel1.Name = "linkLabel1";
 this.linkLabel1.Size = new System.Drawing.Size(440, 24);
 this.linkLabel1.TabIndex = 7;
 this.linkLabel1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
 this.linkLabel1.LinkClicked += new 
 System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.linkLabel1_LinkClicked);
 // 
 // Form1
 // 
 this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
 this.BackColor = System.Drawing.SystemColors.Control;
 this.ClientSize = new System.Drawing.Size(464, 157);
 this.Controls.Add(this.linkLabel1);
 this.Controls.Add(this.button2);
 this.Controls.Add(this.txtFileName);
 this.Controls.Add(this.label3);
 this.Controls.Add(this.txtServerPath);
 this.Controls.Add(this.label2);
 this.Controls.Add(this.button1);
 this.Controls.Add(this.label1);
 this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
 this.Name = "Form1";
 this.Text = "WebClient 上传文件的例子";
 this.Resize += new System.EventHandler(this.Form1_Resize);
 this.ResumeLayout(false);

 }
 #endregion
 [STAThread]
 static void Main() 
 {
 Application.Run(new Form1());
 }

 /// <summary>
 /// .NET SDK 上面的打开文件的类
 /// </summary>

 private FileStream OpenFile()
 {
 OpenFileDialog dlgOpenFile = new OpenFileDialog();
 dlgOpenFile.ShowReadOnly = true;


 if(dlgOpenFile.ShowDialog() == DialogResult.OK)
 {
 if(dlgOpenFile.ReadOnlyChecked == true)
 {
 return (FileStream)dlgOpenFile.OpenFile();

 }
 else
 {
 string path = dlgOpenFile.FileName;
 return new FileStream(path, System.IO.FileMode.Open, 
 System.IO.FileAccess.ReadWrite);
 }
 }
 return null;
 }

 private void button2_Click(object sender, System.EventArgs e)
 {
 OpenFileDialog dlgOpenFile = new OpenFileDialog();
 dlgOpenFile.InitialDirectory = @"C:\";
 dlgOpenFile.ShowReadOnly = false;
 dlgOpenFile.ReadOnlyChecked = true;
 dlgOpenFile.Filter = "所有文件 (*.*)|*.*";
 if(dlgOpenFile.ShowDialog() == DialogResult.OK)
 {
 if(dlgOpenFile.ReadOnlyChecked == true)
 {
 txtFileName.Text = dlgOpenFile.FileName.ToString();
 }
 }
 }

 private void button1_Click(object sender, System.EventArgs e)
 {
 // 需要注意的是：txtServerPath文件夹有匿名可写的权限。
 // 可以自己定义新文件名字
 if(txtFileName.Text.Trim() == "" || txtServerPath.Text.Trim() == "")
 {
 MessageBox.Show("请输入你要上载的文件名字！","错误：", MessageBoxButtons.OK,
 MessageBoxIcon.Information); 
 }
 else
 {
 /// 得到文件名，文件扩展名字，服务器路径
 string fileNamePath = txtFileName.Text.Trim();
 string uriString = txtServerPath.Text.Trim();
 string fileName = fileNamePath.Substring(fileNamePath.LastIndexOf("\\") + 1); 
 string fileNameExt = fileName.Substring(fileName.LastIndexOf(".") + 1);
 if(uriString.EndsWith("/") == false) uriString = uriString + "/";

 uriString = uriString + fileName;
 /// 创建WebClient实例
 WebClient myWebClient = new WebClient();
 myWebClient.Credentials = CredentialCache.DefaultCredentials;

 // 要上传的文件
 FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
 //FileStream fs = OpenFile();
 BinaryReader r = new BinaryReader(fs);
 try
 {
 //使用UploadFile方法可以用下面的格式
 //myWebClient.UploadFile(uriString,"PUT",fileNamePath);
 byte[] postArray = r.ReadBytes((int)fs.Length);
 Stream postStream = myWebClient.OpenWrite(uriString,"PUT");
 if(postStream.CanWrite)
 {
 postStream.Write(postArray,0,postArray.Length);
 label1.Text = fileName + "上传成功！";
 }
 else
 {
 label1.Text = "文件目前不可写！";
 }
 postStream.Close();
 linkLabel1.Text = "查看上载的文件";
 for(int i = linkLabel1.Links.Count - 1;i>-1;i--)
 linkLabel1.Links.Remove(linkLabel1.Links[i]);
 linkLabel1.Links.Add(0,linkLabel1.Text.Length,uriString); 
 }
 catch(WebException errMsg)
 {
 label1.Text="上传失败：" + errMsg.Message;
 }
 }
 }

 private void linkLabel1_LinkClicked(object sender, System.Windows.Forms.LinkLabelLinkClickedEventArgs e)
 {
 this.WindowState = FormWindowState.Minimized;
 this.linkLabel1.Links[linkLabel1.Links.IndexOf(e.Link)].Visited = true;
 string target = e.Link.LinkData as string;
 if(null != target)
 {
 System.Diagnostics.Process.Start(target);
 }
 else
 { 
 MessageBox.Show("请用浏览器访问：" + target);
 }
 }

 private void Form1_Resize(object sender, System.EventArgs e)
 {
 if(this.WindowState == FormWindowState.Maximized) this.WindowState = FormWindowState.Normal;
 }

 private void button1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
 {
 if(txtFileName.Text.Trim() != "" && txtServerPath.Text.Trim() != "")
 label1.Text = "正在上传文件，请稍侯&hellip;&hellip;！";
 } 
 }
}
</div>
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