C# 正在尝试将文件上载到远程计算机获取异常“；（530）未登录“；

我正在尝试将文件上载到远程计算机，出现异常

（530）未登录

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有人能帮忙吗？

@Mainak，您需要向FTP服务器提供一个凭据，以便它能够验证您是否被允许访问它。试试这个：

using (WebClient webClient = new WebClient())
{
string filePath = "D:/CLIENT/12345.txt";
webClient.Credentials = new NetworkCredential("ftpusername", "ftpuserpassword");
webClient.UploadFile("ftp://10.10.10.21/var/www/webdav/12345.txt","STOR",     filePath);
}

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webClient.Credentials=新的网络凭据（用户，通过）在尝试upload@AlexK. 现在我得到一个新的异常“系统错误”
using (WebClient webClient = new WebClient())
{
string filePath = "D:/CLIENT/12345.txt";
webClient.Credentials = new NetworkCredential("ftpusername", "ftpuserpassword");
webClient.UploadFile("ftp://10.10.10.21/var/www/webdav/12345.txt","STOR",     filePath);
}