/// <summary>
/// 获取附件字节数组
/// </summary>
/// <param name="saveMode"></param>
/// <param name="fa"></param>
/// <param name="DC"></param>
/// <returns></returns>
private static byte[] GetBytes(SaveFileModeEnum saveMode, FileAttachment fa, IDataContext DC)
{
byte[] data = null;
switch (saveMode)
{
case SaveFileModeEnum.Local:
if (!string.IsNullOrEmpty(fa.Path) && File.Exists(fa.Path))
{
data = File.ReadAllBytes(fa.Path);
}
break;
case SaveFileModeEnum.Database:
data = DC.Set <FileAttachment>().Where(x => x.ID == fa.ID).Select(x => x.FileData).FirstOrDefault();
break;
case SaveFileModeEnum.DFS:
try
{
data = FDFSClient.DownloadFile(fa.GroupName, fa.Path.TrimStart('/'));
}
catch (FDFSException)
{
}
break;
}
return(data);
}
/// <summary>
/// 获取附件字节数组
/// </summary>
/// <param name="saveMode"></param>
/// <param name="fa"></param>
/// <param name="DC"></param>
/// <returns></returns>
private static byte[] GetBytes(SaveFileModeEnum saveMode, FileAttachment fa)
{
byte[] data = null;
switch (saveMode)
{
case SaveFileModeEnum.Local:
if (!string.IsNullOrEmpty(fa.Path) && File.Exists(fa.Path))
{
data = File.ReadAllBytes(fa.Path);
}
break;
case SaveFileModeEnum.DFS:
new Exception("未实现");
//try
//{
// data = FDFSClient.DownloadFile(fa.GroupName, fa.Path.TrimStart('/'));
//}
//catch (FDFSException)
//{
//}
break;
}
return(data);
}
/// <summary>
/// 通过FileAttachmentVM获取其文件流
/// </summary>
/// <param name="vm"></param>
/// <param name="con"></param>
/// <returns></returns>
public static byte[] GetFileByteForDownLoadByVM(FileAttachmentVM vm, Configs con)
{
byte[] data = null;
SaveFileModeEnum saveMode = vm.Entity.SaveFileMode == null ? con.FileUploadOptions.SaveFileMode : vm.Entity.SaveFileMode.Value;
data = GetBytes(saveMode, vm.Entity, vm.DC);
return(data);
}
/// <summary>
/// 通过FileAttachmentVM获取其文件流
/// </summary>
/// <param name="vm"></param>
/// <param name="con"></param>
/// <returns></returns>
public static byte[] GetFileByteForDownLoadByVM(FileAttachment vm, FileUploadOptions fileUploadOptions)
{
byte[] data = null;
SaveFileModeEnum saveMode = vm.SaveFileMode == null ? fileUploadOptions.SaveFileMode : vm.SaveFileMode.Value;
data = GetBytes(saveMode, vm);
return(data);
}
/// <summary>
/// 通过FileAttachment实体获取其文件流
/// </summary>
/// <param name="fi">FileAttachment</param>
/// <param name="con">con</param>
/// <returns>byte[]</returns>
public static byte[] GetFileByteForDownLoadByEntity(FileAttachment fi, Configs con)
{
byte[] data = null;
if (fi != null)
{
SaveFileModeEnum saveMode = fi.SaveFileMode == null ? con.FileUploadOptions.SaveFileMode : fi.SaveFileMode.Value;
data = GetBytes(saveMode, fi, null);
}
return(data);
}
/// <summary>
/// 通过FileId获取其文件流
/// </summary>
/// <param name="fileid"></param>
/// <param name="dc"></param>
/// <param name="con"></param>
/// <returns></returns>
public static byte[] GetFileByteForDownLoadById(Guid fileid, IDataContext dc, Configs con)
{
byte[] data = null;
FileAttachment fi = dc.Set <FileAttachment>().Where(x => x.ID == fileid).FirstOrDefault();
if (fi != null)
{
SaveFileModeEnum saveMode = fi.SaveFileMode == null ? con.FileUploadOptions.SaveFileMode : fi.SaveFileMode.Value;
data = GetBytes(saveMode, fi, dc);
}
return(data);
}
/// <summary>
/// 获取附件字节数组
/// </summary>
/// <param name="saveMode"></param>
/// <param name="fa"></param>
/// <param name="DC"></param>
/// <returns></returns>
private static byte[] GetBytes(SaveFileModeEnum saveMode, FileAttachment fa, IDataContext DC)
{
byte[] data = null;
switch (saveMode)
{
case SaveFileModeEnum.Local:
if (!string.IsNullOrEmpty(fa.Path) && File.Exists(fa.Path))
{
data = File.ReadAllBytes(fa.Path);
}
break;
case SaveFileModeEnum.Database:
data = DC.Set <FileAttachment>().Include(x => x.FileData).Where(x => x.ID == fa.ID).Select(x => x.FileData.FileData).FirstOrDefault();
break;
}
return(data);
}
