/// <summary>
/// 获取表列架构（链接错误时，抛异常）
/// </summary>
/// <param name="tableName">表名</param>
/// <param name="conn">数据库链接</param>
/// <param name="errInfo">出错时的错误信息</param>
/// <returns></returns>
public static MDataColumn GetColumns(string tableName, string conn, out string errInfo)
{
errInfo = string.Empty;
try
{
return(ColumnSchema.GetColumns(tableName, conn));
}
catch (Exception err)
{
errInfo = err.Message;
return(null);
}
}
/// <summary>
/// 将原有的初始化改造成延时加载。
/// </summary>
private void SetDelayInit(Object entityInstance, string tableName, string conn, AopOp op)
{
if (string.IsNullOrEmpty(conn))
{
//不设置链接，则忽略（当成普通的实体类）
return;
}
entity = entityInstance;
typeInfo = entity.GetType();
try
{
if (string.IsNullOrEmpty(tableName))
{
tableName = typeInfo.Name;
if (tableName.EndsWith(AppConfig.EntitySuffix))
{
tableName = tableName.Substring(0, tableName.Length - AppConfig.EntitySuffix.Length);
}
}
string key = tableName + StaticTool.GetHashKey(conn);
if (!CacheManage.LocalInstance.Contains(key))
{
DalType dal = DBTool.GetDalType(conn);
bool isTxtDal = dal == DalType.Txt || dal == DalType.Xml;
string errMsg = string.Empty;
Columns = DBTool.GetColumns(tableName, conn, out errMsg);//内部链接错误时抛异常。
if (Columns == null || Columns.Count == 0)
{
if (errMsg != string.Empty)
{
Error.Throw(errMsg);
}
Columns = ColumnSchema.GetColumns(typeInfo);
ConnBean connBean = ConnBean.Create(conn);//下面指定链接，才不会在主从备时被切换到其它库。
if (!DBTool.ExistsTable(tableName, connBean.ConnString))
{
DBTool.ErrorMsg = null;
if (!DBTool.CreateTable(tableName, Columns, connBean.ConnString))
{
Error.Throw("SimpleOrmBase ：Create Table " + tableName + " Error:" + DBTool.ErrorMsg);
}
}
}
else if (isTxtDal)//文本数据库
{
if (FieldSource != FieldSource.Data)
{
MDataColumn c2 = ColumnSchema.GetColumns(typeInfo);
if (FieldSource == FieldSource.BothOfAll)
{
Columns.AddRange(c2);
}
else
{
Columns = c2;
}
}
}
if (Columns != null && Columns.Count > 0)
{
CacheManage.LocalInstance.Set(key, Columns, 1440, null);
}
}
else
{
Columns = CacheManage.LocalInstance.Get(key) as MDataColumn;
}
_Action = new MAction(Columns.ToRow(tableName), conn);
if (typeInfo.Name == "SysLogs")
{
_Action.SetAopState(Aop.AopOp.CloseAll);
}
else
{
_Action.SetAopState(op);
}
_Action.EndTransation();
}
catch (Exception err)
{
if (typeInfo.Name != "SysLogs")
{
Log.Write(err, LogType.DataBase);
}
throw;
}
}
/// <summary>
/// 获取表列架构
/// </summary>
public static MDataColumn GetColumns(Type typeInfo)
{
return(ColumnSchema.GetColumns(typeInfo));
}
