public CustomFileInfo GetFileInfo(string fileName)
{
string filePath = System.Web.Hosting.HostingEnvironment.MapPath("~/UpLoadFile/") + fileName;
if (File.Exists(filePath))
{
var fs = new FileStream(filePath, FileMode.OpenOrCreate);
CustomFileInfo fileInfo = new CustomFileInfo
{
Name = fileName,
OffSet = fs.Length,
};
fs.Close();
return(fileInfo);
}
return(null);
}
public CustomFileInfo UpLoadFileInfo(CustomFileInfo fileInfo)
{
// 获取服务器文件上传路径
string fileUpLoadPath = System.Web.Hosting.HostingEnvironment.MapPath("~/UpLoadFile/");
// 如需指定新的文件夹，需要进行创建操作。
// 创建FileStream对象
FileStream fs = new FileStream(fileUpLoadPath + fileInfo.Name, FileMode.OpenOrCreate);
long offSet = fileInfo.OffSet;
// 使用提供的流创建BinaryWriter对象
var binaryWriter = new BinaryWriter(fs, Encoding.UTF8);
binaryWriter.Seek((int)offSet, SeekOrigin.Begin);
binaryWriter.Write(fileInfo.SendByte);
fileInfo.OffSet = fs.Length;
fileInfo.SendByte = null;
binaryWriter.Close();
fs.Close();
return(fileInfo);
}
