C# Winform WebClient上传文件至服务器

/// <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>
/// <returns></returns>
public static bool UploadFile(string localFilePath, string serverFolder)
{
string uriString;
// 得到文件名，文件扩展名字，服务器路径
uriString = serverFolder + localFilePath.Substring(localFilePath.LastIndexOf("\\") + 1);

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

// 要上传的文件
FileStream fs = new FileStream(localFilePath, FileMode.Open, FileAccess.Read);
BinaryReader r = new BinaryReader(fs);
try
{
//使用UploadFile方法可以用下面的格式
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;
}