public FileUploadMessage DownloadFile(FileUploadMessage file)
{
if(File.Exists(file.SaveName))
{
file.FindFile = true;
}
else
{
file.FindFile = false;
return file;
}
const int maxSize = 1024 * 10; //设置每次传10k
string path =file.SaveName;
Stream stream=null;
try
{
stream = new FileStream(path, FileMode.Open);
file.Length = stream.Length;
file.Data = new byte[file.Length - file.Offset <= maxSize ? file.Length - file.Offset : maxSize];
stream.Position = file.Offset; //设置本地文件数据的读取位置
stream.Read(file.Data, 0, file.Data.Length);//把数据写入到file.Data中
file.Offset = file.Offset + file.Data.Length;
return file;
}
finally
{
if (stream != null) stream.Close();
}
}
public FileUploadMessage UploadFile(FileUploadMessage file)
{
string diskName = GetDiskName();
string filePath = diskName + "Upload\\";
//获取文件的路径,已经保存的文件名
if (!Directory.Exists(filePath))
{
Directory.CreateDirectory(filePath);
}
string path = filePath + file.SaveName;
var fs = new FileStream(path, FileMode.OpenOrCreate);
//打开文件
long offset = file.Offset;//file.Offset
var writer = new BinaryWriter(fs);//初始化文件写入器
writer.Seek((int)offset, SeekOrigin.Begin);//设置文件的写入位置
writer.Write(file.Data);//写入数据
file.Offset = fs.Length;//返回追加数据后的文件位置
file.Data = null;
file.SavePath = path;
writer.Close();
fs.Close();
return file;
}
