ASP.NET上传下载文件示例，使用webClient实现

/// <summary>
/// WebClient上传文件至服务器
/// </summary>
/// <param name="fileNamePath">文件名，全路径格式</param>
/// <param name="uriString">服务器文件夹路径</param>
public string UploadFile(string fileNamePath,string uriString)
{
string fileName = fileNamePath.Substring(fileNamePath.LastIndexOf("//") + 1);
string NewFileName = DateTime.Now.ToString("yyMMddhhmmss") + DateTime.Now.Millisecond.ToString() + fileNamePath.Substring(fileNamePath.LastIndexOf("."));
string fileNameExt = fileName.Substring(fileName.LastIndexOf(".") + 1);
if(uriString.EndsWith("/") == false)
{
uriString = uriString + "/";
}
uriString = uriString + NewFileName;
// 创建WebClient实例
WebClient myWebClient = new WebClient();
myWebClient.Credentials = CredentialCache.DefaultCredentials;
// 要上传的文件
FileStream fs = new FileStream(fileNamePath, 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);
}
else
{
return "No Write.";
}
postStream.Close();
return "Succefull";
}
catch(Exception ex)
{
return "Error:" + ex.Message;
}
}
/// <summary>
/// 下载服务器文件至客户端
/// </summary>
/// <param name="URL">被下载的文件地址，绝对路径</param>
/// <param name="Dir">另存放的目录</param>
public string Download(string URL,string Dir)
{
WebClient client = new WebClient();
string fileName = URL.Substring(URL.LastIndexOf("/") + 1);  //被下载的文件名
string Path = Dir+fileName;   //另存为的绝对路径＋文件名
try
{
WebRequest myre=WebRequest.Create(URL);
}
catch(Exception ex)
{
return "Error:" + ex.Message;
}
try
{
client.DownloadFile(URL,Path);
return "Succefull";
}
catch(Exception ex)
{
return "Error:" + ex.Message;
}
}