public TResult Execute <TResult>(Expression expression)
{
object obj2;
var base2 = ProviderFactory.CreateProvider(dc.dbconn(string.Empty).Reader.DatabaseType);
var result = ParseExpression(expression);
var type = typeof(TResult);
//SqlExecutorBase base3 = base2.CreateSqlExecutor();
if ((expression.NodeType != ExpressionType.Call) || !type.IsValueType)
{
var flag = false;
if (type.IsGenericType)
{
var reader = ModelOpretion.SearchDataRetunDataTable(result.CommandText,
result.SqlQueryParameters, null); //base3.ExecuteReader(result.CommandText, result.Parameters);
if (type.GetGenericTypeDefinition() == ReflectorConsts.IEnumerableType)
{
var objectType = type.GetGenericArguments()[0];
IList list = null;
try
{
list = EntityMapper.Map(objectType, reader, base2.ObjectPropertyConvertType);
}
catch
{
throw new Exception("转化成TResult失败");
}
return((TResult)list);
}
if (typeof(Nullable <>).IsAssignableFrom(type))
{
flag = true;
}
if (!flag)
{
throw new Exception();
}
}
if (type.IsValueType | flag)
{
var obj = ModelOpretion.ScalarBache(result.CommandText, result.SqlQueryParameters, null);
if (obj == null)
{
return(default(TResult));
}
if (obj == DBNull.Value)
{
return(default(TResult));
}
return((TResult)Convert.ChangeType(obj, type));
}
if (!EntityConfigurationManager.IsEntity(type))
{
throw new Exception();
}
var dataReader = ModelOpretion.SearchDataRetunDataTable(result.CommandText,
result.SqlQueryParameters, null);
IList list2 = null;
try
{
list2 = EntityMapper.Map(type, dataReader, base2.ObjectPropertyConvertType);
}
catch (Exception ex)
{
throw new Exception("TResult:转化成实体失败.");
}
finally
{
}
if (list2.Count <= 0)
{
return(default(TResult));
}
var entity = list2[0];
return((TResult)entity);
}
//var name = ((MethodCallExpression) expression).Method.Name;
//if (name != "Any")
//{
// if ((name != "Delete") && (name != "Update"))
// {
// if ((name != "Average") && (name != "Sum") && (name != "Count"))
// {
// throw new Exception();
// }
// obj2 = base3.ExecuteScalar(result.CommandText, result.Parameters);
// if (obj2 == DBNull.Value)
// {
// return default(TResult);
// }
// var converter1 = new BaseTypeConverter(obj2, type);
// converter1.Process();
// return (TResult) converter1.Result;
// }
//}
//else
//{
// DataSet set = base3.ExecuteDataSet(result.CommandText, result.Parameters);
// obj2 = set.Tables.Count <= 0 ? 0 : (object) (set.Tables[0].Rows.Count > 0);
// return (TResult) obj2;
//}
obj2 = ModelOpretion.ScalarBache(result.CommandText,
result.SqlQueryParameters, null);
return((TResult)obj2);
}
public static TResult Map <TSource, TResult>(TSource source)
{
return(EntityMapper.Map <TSource, TResult>(source));
}