public override void InsertFile(UploadedFile file)
{
UploadStorageDataContext db = new UploadStorageDataContext(ConfigurationManager.ConnectionStrings[this.ConnectionStringName].ConnectionString);
Table<LinqUploadedFile> files = db.GetTable<LinqUploadedFile>();
file.ApplicationName = this.ApplicationName;
files.InsertOnSubmit(new LinqUploadedFile(file));
try
{
db.SubmitChanges(ConflictMode.ContinueOnConflict);
}
catch (ChangeConflictException ex)
{
Trace.TraceError(ex.Message);
// All database values overwrite current values.
foreach (ObjectChangeConflict occ in db.ChangeConflicts)
occ.Resolve(RefreshMode.OverwriteCurrentValues);
}
catch (DbException ex)
{
Trace.TraceError(ex.Message);
}
}
public override void UpdateFile(UploadedFile file)
{
if (file == null)
throw new ArgumentNullException("file");
UploadStorageDataContext db = new UploadStorageDataContext(ConfigurationManager.ConnectionStrings[this.ConnectionStringName].ConnectionString);
Table<LinqUploadedFile> files = db.GetTable<LinqUploadedFile>();
// BusinessBase inherited clases will have a downside effect with a ChangeConflictException
// as it has changed LastUpdated row version in the call stack.
UploadedFile f = SelectFile(file.ID, false);
if (f != null)
file.LastUpdated = f.LastUpdated;
// Assume that "file" has been sent by client.
// Attach with "true" to the change tracker to consider the entity modified
// and it can be checked for optimistic concurrency because
// it has a column that is marked with "RowVersion" attribute
files.Attach(new LinqUploadedFile(file), true);
try
{
db.SubmitChanges(ConflictMode.ContinueOnConflict);
}
catch (ChangeConflictException)
{
// All database values overwrite current values.
foreach (ObjectChangeConflict occ in db.ChangeConflicts)
occ.Resolve(RefreshMode.OverwriteCurrentValues);
}
catch (DbException ex)
{
Trace.TraceError(ex.Message);
}
}
public override List<UploadedFile> GetFiles(Guid? id, Guid? parentId, string fileName,
DateTime? initialDateCreated, DateTime? finalDateCreated,
DateTime? initialLastUpdated, DateTime? finalLastUpdated,
string contentType, bool includeData, int pageSize, int pageIndex, out int totalCount)
{
totalCount = 0;
List<UploadedFile> results = new List<UploadedFile>();
#if GETFILES_W_SPROC
int? _totalCount = null;
UploadStorageDataContext db = new UploadStorageDataContext(ConfigurationManager.ConnectionStrings[this.ConnectionStringName].ConnectionString);
var query =
db.GetFiles(this.ApplicationName, id, contentType, initialDateCreated, finalDateCreated, fileName,
initialLastUpdated, finalLastUpdated, parentId, pageIndex * pageSize,
(pageIndex * pageSize) + pageSize, ref _totalCount);
foreach (GetFilesResult item in query)
results.Add(SelectFile(item.ID, includeData));
#else
UploadStorageDataContext db = new UploadStorageDataContext(ConfigurationManager.ConnectionStrings[this.ConnectionStringName].ConnectionString);
Table<PersistableUploadedFile> files = db.GetTable<PersistableUploadedFile>();
var query =
from file in files
where file.ApplicationName == this.ApplicationName
where file.ID == (id.HasValue && id.Value != Guid.Empty ? id.Value : file.ID)
where file.ParentID == (parentId.HasValue && parentId.Value != Guid.Empty ? parentId.Value : file.ParentID)
where file.FileName == (!string.IsNullOrEmpty(fileName) ? fileName : file.FileName)
where file.DateCreated >= (initialDateCreated.HasValue && initialDateCreated != DateTime.MinValue ? initialDateCreated.Value : file.DateCreated)
where file.DateCreated <= (finalDateCreated.HasValue && finalDateCreated != DateTime.MinValue ? finalDateCreated.Value : file.DateCreated)
where file.LastUpdated >= (initialLastUpdated.HasValue && initialLastUpdated != DateTime.MinValue ? initialLastUpdated.Value : file.LastUpdated)
where file.LastUpdated <= (initialLastUpdated.HasValue && initialLastUpdated != DateTime.MinValue ? initialLastUpdated.Value : file.LastUpdated)
where file.ContentType == (!string.IsNullOrEmpty(contentType) ? contentType : file.ContentType)
orderby file.FileName ascending
select file;
foreach (PersistableUploadedFile item in query.Skip(pageSize * pageIndex).Take(pageSize))
results.Add(new UploadedFile(item));
totalCount = query.Count();
#endif
return results;
}
public override List<UploadedFile> GetFiles(Guid parentId)
{
List<UploadedFile> results = new List<UploadedFile>();
UploadStorageDataContext db = new UploadStorageDataContext(ConfigurationManager.ConnectionStrings[this.ConnectionStringName].ConnectionString);
Table<LinqUploadedFile> files = db.GetTable<LinqUploadedFile>();
var query =
from file in files
where file.ApplicationName == this.ApplicationName
where file.ParentID == parentId
orderby file.FileName ascending
select file;
foreach (var row in query)
{
results.Add(new UploadedFile(row.ID)
{
ApplicationName = this.ApplicationName,
ParentID = row.ParentID,
FileName = row.FileName,
Description = row.Description,
DateCreated = row.DateCreated,
LastUpdated = row.LastUpdated,
ContentType = row.ContentType,
ContentLength = row.ContentLength,
Data = row.Data
});
break;
}
return results;
}
public override UploadedFile SelectFile(Guid id, bool includeData)
{
UploadedFile file = null;
UploadStorageDataContext db = new UploadStorageDataContext(ConfigurationManager.ConnectionStrings[this.ConnectionStringName].ConnectionString);
Table<LinqUploadedFile> files = db.GetTable<LinqUploadedFile>();
LinqUploadedFile row = files.SingleOrDefault<LinqUploadedFile>(
f => f.ApplicationName == this.ApplicationName && f.ID == id);
if (row == null)
return null;
file = new UploadedFile(row.ID)
{
ApplicationName = this.ApplicationName,
ParentID = row.ParentID,
FileName = row.FileName,
Description = row.Description,
DateCreated = row.DateCreated,
LastUpdated = row.LastUpdated,
ContentType = row.ContentType,
ContentLength = row.ContentLength,
Data = includeData ? row.Data : null
};
return file;
}
public override void DeleteFile(UploadedFile file)
{
if (file == null)
throw new ArgumentNullException("file");
LinqUploadedFile f = new LinqUploadedFile(file);
UploadStorageDataContext db = new UploadStorageDataContext(ConfigurationManager.ConnectionStrings[this.ConnectionStringName].ConnectionString);
Table<LinqUploadedFile> files = db.GetTable<LinqUploadedFile>();
files.Attach(f);
files.DeleteOnSubmit(f);
try
{
db.SubmitChanges(ConflictMode.ContinueOnConflict);
}
catch (ChangeConflictException ex)
{
Trace.TraceError(ex.Message);
// All database values overwrite current values.
foreach (ObjectChangeConflict occ in db.ChangeConflicts)
occ.Resolve(RefreshMode.OverwriteCurrentValues);
}
catch (DbException ex)
{
Trace.TraceError(ex.Message);
}
}
