/// <summary>
/// 从台账服务器拿db文件http的方式
/// </summary>
/// <param name="infoString"></param>
/// <returns></returns>
public static bool TZDown(string strFileName, string TZdz, string ftplj)
{
//将文件名改一下
strFileName = strFileName + ".wait";
bool flag = false;
//打开上次下载的文件
long SPosition = 0;
//实例化流对象
FileStream FStream;
//判断要下载的文件夹是否存在
if (File.Exists(strFileName))
{
//打开要下载的文件
FStream = File.OpenWrite(strFileName);
//获取已经下载的长度
SPosition = FStream.Length;
FStream.Seek(SPosition, SeekOrigin.Current);
}
else
{
//文件不保存创建一个文件
FStream = new FileStream(strFileName, FileMode.Create);
SPosition = 0;
}
try
{
//打开网络连接
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(TZdz);
if (SPosition > 0)
{
myRequest.AddRange((int)SPosition); //设置Range值
}
//向服务器请求,获得服务器的回应数据流
Stream myStream = myRequest.GetResponse().GetResponseStream();
//定义一个字节数据
byte[] btContent = new byte[1024];
int intSize = 0;
intSize = myStream.Read(btContent, 0, 1024);
while (intSize > 0)
{
FStream.Write(btContent, 0, intSize);
intSize = myStream.Read(btContent, 0, 1024);
}
FStream.Flush();
//关闭流
FStream.Close();
myStream.Close();
//将文件名改回来
string tempName = strFileName;
strFileName = strFileName.Substring(0, strFileName.Length - 5);
File.Move(tempName, strFileName);
flag = true; //返回true下载成功
}
catch (Exception ex)
{
PublicMethod.write_state(ftplj + "\\", -1.01);
CYZFramework.Log.CYZLog.writeLog(ex.ToString());
FStream.Close();
flag = false; //返回false下载失败
}
return(flag);
}