static object Sum(IEnumerable data
, ExpressionNode node
, object context
, string exp
, out int count
, out StorageType type)
{
count = 0;
type = StorageType.Empty;
//if (0 == view.Data.Count)
// return 0;
object value = 0;
foreach (object value2 in Aggregates.NotNullValue(data, node, context))
{
count++;
if (type == StorageType.Empty)
{
type = DataStorageHelper.GetStorageType(value2.GetType());
if (count == 1 && type == StorageType.String)
{
value = 0m;
}
if (!(type == StorageType.SqlDecimal ||
type == StorageType.SqlMoney ||
type == StorageType.Decimal ||
type == StorageType.Single))
{
if (ExpressionNode.IsUnsignedSql(type))
{
type = StorageType.UInt64;
}
if (ExpressionNode.IsInteger(type))
{
type = StorageType.Int64;
}
else if (ExpressionNode.IsIntegerSql(type))
{
type = StorageType.SqlInt64;
}
else if (ExpressionNode.IsFloat(type))
{
type = StorageType.Double;
}
else if (ExpressionNode.IsFloatSql(type))
{
type = StorageType.SqlDouble;
}
}
}
value = Add(value, value2, type);
}
return(value);
}
internal static bool IsSignedSql(StorageType type)
{
if (type != StorageType.Int16 && type != StorageType.Int32 && (type != StorageType.Int64 && type != StorageType.SByte) && (type != StorageType.SqlInt64 && type != StorageType.SqlInt32 && type != StorageType.SqlInt16))
{
return(ExpressionNode.IsFloatSql(type));
}
return(true);
}
internal static bool IsNumericSql(StorageType type)
{
if (!ExpressionNode.IsFloatSql(type))
{
return(ExpressionNode.IsIntegerSql(type));
}
return(true);
}
private static object Sum(
IEnumerable data,
ExpressionNode node,
object context,
string exp,
out int count,
out StorageType type)
{
count = 0;
type = StorageType.Empty;
object obj1 = (object)0;
foreach (object obj2 in Aggregates.NotNullValue(data, node, context))
{
++count;
if (type == StorageType.Empty)
{
type = DataStorageHelper.GetStorageType(obj2.GetType());
if (count == 1 && type == StorageType.String)
{
obj1 = (object)new Decimal(0);
}
if (type != StorageType.SqlDecimal && type != StorageType.SqlMoney && (type != StorageType.Decimal && type != StorageType.Single))
{
if (ExpressionNode.IsUnsignedSql(type))
{
type = StorageType.UInt64;
}
if (ExpressionNode.IsInteger(type))
{
type = StorageType.Int64;
}
else if (ExpressionNode.IsIntegerSql(type))
{
type = StorageType.SqlInt64;
}
else if (ExpressionNode.IsFloat(type))
{
type = StorageType.Double;
}
else if (ExpressionNode.IsFloatSql(type))
{
type = StorageType.SqlDouble;
}
}
}
obj1 = Aggregates.Add(obj1, obj2, type);
}
return(obj1);
}
