public static BackupItemEx FindBackupItemEx(List <BackupItemEx> items, Type objectType)
{
BackupItemEx bi = null;
if (items != null)
{
foreach (BackupItemEx item in items)
{
if (item.ItemType == objectType)
{
bi = item;
break;
}
}
}
return(bi);
}
protected virtual void Backup(BackupItemEx bi)
{
}
public virtual bool Backup(List <BackupItemEx> items, string backupfile)
{
try
{
if (items != null && items.Count > 0)
{
string dir = AppDomain.CurrentDomain.BaseDirectory;
// make sure the capacity is big enough
List <string> files = new List <string>(items.Count);
int index = 0;
int count = 0;
AutoResetEvent autoResetEvent = new AutoResetEvent(false);
foreach (BackupItemEx bi in items)
{
if ((bi.BackupObjects == null || bi.BackupObjects.Count == 0) && string.IsNullOrEmpty(bi.DumpQuery))
{
continue;
}
++count;
ThreadPool.QueueUserWorkItem((obj) =>
{
BackupItemEx tmpBi = obj as BackupItemEx;
Backup(tmpBi);
if (File.Exists(tmpBi.BackupFileName))
{
FileInfo fi = new FileInfo(tmpBi.BackupFileName);
if (fi.Length > 2)
{
lock (this) //need synchronization block
{
files.Add(tmpBi.BackupFileName);
}
}
else
{
FileDirectoryOperate.DeleteFileWithTime(tmpBi.BackupFileName);
}
}
Interlocked.Increment(ref index);
if (index == count)
{
autoResetEvent.Set();
}
try
{
if (worker != null && worker.WorkerReportsProgress && worker.IsBusy)
{
worker.ReportProgress(index * 100 / items.Count);
}
}
catch
{
}
}, bi);
}
autoResetEvent.WaitOne(60000, false);
if (files.Count == 0)
{
return(false);
}
if (worker != null && worker.WorkerReportsProgress && worker.IsBusy)
{
worker.ReportProgress(50, string.Format("Back up database:", backupfile));
}
SharpZipHelper.ZipMultiFiles(files.ToArray(), backupfile, DatabaseCommon.ZipPwd, 3, worker);
foreach (string file in files)
{
FileDirectoryOperate.DeleteFileWithTime(file);
}
return(true);
}
else
{
return(false);
}
}
catch (Exception ex)
{
LogHelper.Log(ex);
return(false);
}
}
protected override void Backup(BackupItemEx bi)
{
string dir = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, @"Temp\");
if (!Directory.Exists(dir))
{
FileDirectoryOperate.CreateDirectoryEx(dir);
}
if (bi.IsFullTable)
{
bi.BackupFileName = Path.Combine(dir, bi.TableName + ".bak");
}
else
{
bi.BackupFileName = Path.Combine(dir, bi.TableName + "_" + bi.GuidFieldName + ".bak");
}
var columnPropertyList = DatabaseHelper.GetColumnPropertyInfo(bi.TableName, bi.ItemType);
try
{
using (FileStream fs = new FileStream(bi.BackupFileName, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Read))
using (TextWriter tw = new StreamWriter(fs, Encoding.Unicode))
{
Type blobType = typeof(object);
Type stringType = typeof(string);
Type doubleType = typeof(double);
int recIndex = 0;
do
{
foreach (object backupObj in bi.BackupObjects)
{
int count = 0;
foreach (PropertyInfo pi in columnPropertyList)
{
bool writeContent = true;
object val = pi.GetValue(backupObj, null);
if (pi.PropertyType == stringType)
{
if (val != null && string.IsNullOrEmpty(val as string))
{
val = "\0";
}
}
else if (pi.PropertyType == doubleType)
{
val = string.Format(CultureInfo.InvariantCulture, "{0:R}", val);
}
else if (pi.PropertyType == blobType && val is byte[])
{
byte[] array = val as byte[];
EncodingOperateHelper.ToHexString(array, tw);
writeContent = false;
}
if (writeContent)
{
tw.Write(val);
}
if (++count < columnPropertyList.Count)
{
tw.Write(",\0");
}
}
tw.WriteLine();
}
bi.RecordsNum -= bi.BackupObjects.Count;
recIndex += bi.BackupObjects.Count;
bi.BackupObjects.Clear();
if (bi.RecordsNum > 0 && !string.IsNullOrEmpty(bi.DumpQuery))
{
bi.BackupObjects = DatabaseHelper.GetBoundedEntities(bi.DumpQuery, BackupItemEx.BatchNum, recIndex);
}
else
{
break;
}
} while (bi.RecordsNum > 0);
}
}
catch (System.Exception ex)
{
LogHelper.Log(ex);
}
}
