/// <summary>
/// 根据数据源名称获得相应的DBHelper
/// 若缓存中有则直接返回 ///
/// </summary>
/// <param name="dsName">data source name(lowcase)</param>
/// <returns></returns>
public static IDBHelper GetHelper(string dsName)
{
//If Null, init data source list first;
if (DataSourceList == null)
{
//默认使用DBHelper.config，这里可以按需求修改为默认使用App.config
XmlConfigurator.Configure("DBHelper.config");
}
if (string.IsNullOrEmpty(dsName))
{
dsName = "default";
}
dsName = dsName.ToLower();//配置文件中dsName要小写
if (DataSourceList.ContainsKey(dsName))
{
//实例化
DataSourceConfig dsConfig = DataSourceList[dsName];
string[] classNameArray = dsConfig.dialectClass.Split(new char[] { ':', '-' });
string className = classNameArray[1];
string assemblyName = classNameArray[0];
Type type = null;
if (string.IsNullOrEmpty(dsConfig.dialectClass))
{
throw new ArgumentNullException("配置文件错误：请检查Dialect配置");
}
type = Assembly.Load(assemblyName).GetType(className, true);
IDBHelper instance = Activator.CreateInstance(type, dsConfig.Parameters) as IDBHelper;
return(instance);
}
else
{
throw new Exception("Not found data source [" + dsName + "], please check config file.");
}
}
