private Type GetNoOffsetPropertyType(BsColumnOrder orderColumn)
{
var propertyInfo = typeof(TRow).GetProperty(orderColumn.Name);
var baseType = propertyInfo.PropertyType.BaseType;
if (baseType.Name == (typeof(BsGridColumnValue).Name))
{
var mockValue = new BsGridColumnValue <object, object>();
propertyInfo = propertyInfo.PropertyType.GetProperties().FirstOrDefault(p => p.Name == mockValue.GetPropertyName(x => x.ItemValue));
}
var propertyType = propertyInfo.PropertyType;
return(propertyType);
}
private BsExpressionMembers GetExpressionMembers(Type propertyType, BsColumnOrder orderColumn, ParameterExpression pe)
{
Expression left, right;
object value;
var parameterSetVisitor = new ParameterReplaceVisitor();
var finalType = Nullable.GetUnderlyingType(propertyType) ?? propertyType;
if (orderColumn.Value != null)
{
if (finalType == typeof(DateTime))
{
long binaryDate;
var succceded = Int64.TryParse(orderColumn.Value.ToString(), out binaryDate);
if (succceded)
{
value = DateTime.FromBinary(binaryDate);
}
else
{
value = Convert.ChangeType(orderColumn.Value, finalType);
}
}
else
{
value = propertyType.IsEnum
? Enum.Parse(propertyType, orderColumn.Value.ToString())
: Convert.ChangeType(orderColumn.Value, finalType);
}
}
else
{
value = orderColumn.Value;
}
var criteria = this.orderedQueryBuilder.GetCriteria(orderColumn.Name);
if (criteria != null)
{
var body = criteria.GetBody();
left = parameterSetVisitor.ReplaceParameter(body, pe);
}
else
{
left = Expression.Property(pe, orderColumn.Name);
}
right = Expression.Constant(value, propertyType);
if (propertyType == typeof(string))
{
var stringCompare = Expression.Call(left, typeof(string).GetMethod("CompareTo", new[] { typeof(string) }), right);
var zeroConstant = Expression.Constant(0, typeof(int));
left = stringCompare;
right = zeroConstant;
}
else if (propertyType.IsEnum)
{
left = Expression.Convert(left, typeof(long));
right = Expression.Convert(right, typeof(long));
}
return(new BsExpressionMembers
{
Left = left,
Right = right
});
}
