public BinaryExpressionFilter(string left, string op, string right)
{
LeftExpression = left;
RightExpression = right;
MyLeftExpression = Expression.Property(MyParameterExpression, left);
MyRightExpression = BinaryOperatorFactory.CreateConstantExpression(MyLeftExpression, right);
TryChangingOperator(op, MyRightExpression);
}
public bool TryChangingRightExpression(string right)
{
try
{
var exp = BinaryOperatorFactory.CreateConstantExpression(MyLeftExpression, right);
if (TryChangingOperator(Operator, exp))
{
MyRightExpression = exp;
RightExpression = right;
// have to reset the expressionfunc
SetExpressionFunc();
return(true);
}
return(false);
}
catch (Exception)
{
return(false);
}
}
private bool TryChangingOperator(string op, ConstantExpression rightExp)
{
try
{
var exp = BinaryOperatorFactory.CreateBinaryExpression(MyLeftExpression, op,
rightExp);
if (exp == null)
{
return(false);
}
MyBinaryExpression = exp;
Operator = op;
SetExpressionFunc();
return(true);
}
catch (Exception)
{
return(false);
}
}
