大家帮忙看看我的代码错在哪里？

[销魂的西瓜]

FileStream input = new FileStream(strFileName, FileMode.Open);

            int startbye = 0;
            int allbye = (int)input.Length;
            myProgressControl.Maximum = allbye;
            myProgressControl.Minimum = 0;
            int contentLen = input.Read(buffer, 0, buffer.Length);

            while (contentLen!=0)
            {
                contentLen = input.Read(buffer, 0, buffer.Length);
                startbye += contentLen;
                lbl_ftpStakt.Text = "正在上传文件：" + filename + ".exe，已上传:" + (int)(startbye / 1024) + "KB" + "总长度:" + (int)(allbye / 1024) + "KB";
                socketData.Send(buffer, contentLen, 0);
                myProgressControl.Value = startbye;
            }
            input.Close();

1。首先，进度条每次跑到1/3就倒回去重新从起点处跑
2。文件上传最后老是没上传完就停止了，，老差那么点

[机器人]

...

int contentLen = input.Read(buffer, 0, buffer.Length);
int bytesToRead = allbye;

while (bytesToRead > 0)
{
contentLen = input.Read(buffer, startbye, buffer.Length);
startbye += contentLen;
bytesToRead -= contentLen;

lbl_ftpStakt.Text = "正在上传文件：" + filename + ".exe，已上传:" + (int)(startbye / 1024) + "KB" + "总长度:" + (int)(allbye / 1024) + "KB";
socketData.Send(buffer, contentLen, 0);
myProgressControl.Value = startbye;
}

[anselm90]

学习来的。。帮楼主顶起