网络协议的实现与应用实训报告(9)

FTP 服务器的安装和配置方法FTP 客户端的开发方法

btnUpload.Enabled = true; btndownload.Enabled = true; btnDelete.Enabled = true; } else {

lstbxFtpState.Enabled = true; tbxloginmessage.Text = "登录失败"; }

}

6. 上传模块代码

/// <summary>

/// 上传文件 /// </summary>

private void btnUpload_Click(object sender, EventArgs e)

{

// 选择要上传的文件

OpenFileDialog openFileDialog = new OpenFileDialog();

openFileDialog.FileName = openFileDialog.FileNames.ToString(); openFileDialog.Filter = "所有文件(*.*)|*.*"; if (openFileDialog.ShowDialog() != DialogResult.OK) {

return; }

FileInfo fileinfo = new FileInfo(openFileDialog.FileName); try {

string uri = GetUriString(http://www.77cn.com.cn); FtpWebRequest request = CreateFtpWebRequest(uri, WebRequestMethods.Ftp.UploadFile);

request.ContentLength = fileinfo.Length; int buflength = 8196;

byte[] buffer = new byte[buflength];

FileStream filestream = fileinfo.OpenRead(); Stream responseStream = request.GetRequestStream(); lstbxFtpState.Items.Add("打开上传流，文件上传中..."); int contenlength = filestream.Read(buffer, 0, buflength); while (contenlength != 0) {

responseStream.Write(buffer, 0, contenlength); contenlength = filestream.Read(buffer, 0, buflength); }

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