/// <summary>
/// 用来生成一个导出的文件名
/// </summary>
/// <param name="dic"></param>
/// <param name="path"></param>
/// <returns></returns>
public static string GetExportFileName(string dir, out string path)
{
path = "/Files/Export/" + dir;
var guide = Guid.NewGuid().ToString();
path += "/" + guide + ".xlsx";
return(HttpContextHelper.GetPath(path));
}
/// <summary>
/// 下载一个文件
/// </summary>
/// <param name="url"></param>
public static string DownFile(string url, string name)
{
WebClient client = new WebClient();
try
{
Stream str = client.OpenRead(url);
StreamReader reader = new StreamReader(str);
byte[] mbyte = new byte[1000000];
int allmybyte = (int)mbyte.Length;
int startmbyte = 0;
if (allmybyte <= 0)
{
return("");
}
while (allmybyte > 0)
{
int m = str.Read(mbyte, startmbyte, allmybyte);
if (m == 0)
{
break;
}
startmbyte += m;
allmybyte -= m;
}
reader.Dispose();
str.Dispose();
string path = HttpContextHelper.GetPath(name);
if (File.Exists(path))
{
return(path);
}
FileStream fstr = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write);
fstr.Write(mbyte, 0, startmbyte);
fstr.Flush();
fstr.Close();
return(path);
}
catch
{
return("");
}
}