下载服务器文件至客户端/WebClient上传文件至服务器

/// <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 void DownloadUrlFile(string url, string dir)
{
WebClient client = new WebClient();
string fileName = Path.GetFileName(url);  //被下载的文件名
string path = dir + fileName;   //另存为的绝对路径＋文件名

try
{
if (!System.IO.Directory.Exists(dir))
{
System.IO.Directory.CreateDirectory(dir);
}
if (!System.IO.File.Exists(path))
{
client.DownloadFile(url, path);
}
}
catch (Exception)
{
// ShowError("文件下载失败！");
}
}

///<summary>
/// WebClient上传文件至服务器
///</summary>
///<param name="localFilePath">文件名，全路径格式</param>
///<param name="serverFolder">服务器文件夹路径</param>
///<param name="reName">是否需要修改文件名，这里默认是日期格式</param>
///<returns></returns>
public static bool UploadFile(string localFilePath, string serverFolder, bool reName)
{
string fileNameExt, newFileName, uriString;
if (reName)
{
fileNameExt = localFilePath.Substring(localFilePath.LastIndexOf(".") + 1);
newFileName = DateTime.Now.ToString("yyMMddhhmmss.") + fileNameExt;
}
else
{
newFileName = localFilePath.Substring(localFilePath.LastIndexOf("\\") + 1);
}

if (!serverFolder.EndsWith("/") && !serverFolder.EndsWith("\\"))
{
serverFolder = serverFolder + "/";
}

uriString = serverFolder + newFileName;   //服务器保存路径
/**/
/**/
/**/
/// 创建WebClient实例
WebClient myWebClient = new WebClient();
myWebClient.Credentials = CredentialCache.DefaultCredentials;

// 要上传的文件
FileStream fs = new FileStream(localFilePath.Substring(localFilePath.LastIndexOf("\\") + 1), FileMode.Open, FileAccess.Read);
BinaryReader r = new BinaryReader(fs);
try
{
//使用UploadFile方法可以用下面的格式
//myWebClient.UploadFile(uriString,"PUT",localFilePath);
byte[] postArray = r.ReadBytes((int)fs.Length);
Stream postStream = myWebClient.OpenWrite(uriString, "PUT");
if (postStream.CanWrite)
{
postStream.Write(postArray, 0, postArray.Length);
}
else
{
MessageBox.Show("文件目前不可写！");
}
postStream.Close();
}
catch
{
//MessageBox.Show("文件上传失败，请稍候重试~");
return false;
}

return true;
}