private void retrieveFromDB()
{
AbsDatabase db = ServiceManager.GetDatabase();
int keyFromDB;
string sqlUpdate = "UPDATE KeyTable SET keyValue = keyValue + "
+ poolSize + " WHERE keyName = '"
+ keyName + "'";
string sqlGetNewKey = "SELECT keyValue FROM KeyTable WHERE KeyName = '"
+ keyName + "'";
try
{
db.ExecuteNonQuery(sqlUpdate);
keyFromDB = (Int32)db.ExecuteScalar(sqlGetNewKey);
}
catch (Exception)
{
throw;
}
this.keyMax = keyFromDB;
this.keyMin = keyFromDB - poolSize + 1;
this.nextKey = this.keyMin;
}
/// <summary>
/// 获得只包含表结构的DataSet，用于除_Default以外的数据源
/// </summary>
/// <param name="p_db">AbsDatabase对象</param>
/// <param name="p_tableName">表名</param>
/// <returns>DataSet</returns>
public static DataSet GetEmptyEntity(AbsDatabase p_db, string p_tableName)
{
string key = p_db.GetRealOne().ConnectionString + p_tableName;
if (!hashEntities.ContainsKey(key))
{
try
{
string tableName = p_tableName.Trim();
string strSql = string.Format("select * from {0} where 0=1", tableName);
DataSet ds = p_db.GetEntity(strSql, tableName);
hashEntities.Add(key, ds);
return(ds.Clone());
}
catch (Exception e)
{
throw e;
}
}
else
{
return((hashEntities[key] as DataSet).Clone());
}
}
/// <summary>
/// 取得空实体,带详细模式
/// </summary>
/// <param name="p_db">AbsDatabase</param>
/// <param name="p_tableName">表名</param>
/// <returns></returns>
public static DataSet GetEmptyEntityWithSchema(AbsDatabase p_db, string p_tableName)
{
return(GetEmptyEntityWithSchema("select * from " + p_tableName,
p_tableName, p_db));
}
internal static DataSet GetEmptyEntityWithSchema(string selStr, string tableName, AbsDatabase db)
{
string key = selStr + db.GetRealOne().ConnectionString;
if (hashEntitiesWithSchema.ContainsKey(key))
{
return((hashEntitiesWithSchema[key] as DataSet).Clone());
}
else
{
DataSet ds = new DataSet();
IDbDataAdapter adapter = db.GetDataAdapter(selStr);
adapter.FillSchema(ds, SchemaType.Source);
ds.Tables[0].TableName = tableName;
hashEntitiesWithSchema[key] = ds;
return(ds.Clone());
}
}
