Expression CreateLambdaBinary(CRLExpression expression)
{
var left = expression.Left;
var right = expression.Right;
Expression exp;
object value;
var type = expression.ExpType;
if (left.Type == CRLExpressionType.MethodCall)//按方法运算 如 b.NameSubstring,Indexof(0,1)=="123"
{
//按属性的子方法
exp = CreateLambdaMethodCall2(left);
value = ObjectConvert.ConvertObject(exp.Type, right.Data);
}
else if (left.Type == CRLExpressionType.Tree)
{
exp = CreateLambdaBinary(left);//todo 暂时在左边
value = right.Data;
//throw new CRLException("不支持的运算 "+ left.ExpressionType);
}
else//按属性运算 如b.Id==1
{
exp = creater.CreatePropertyExpression(left.Data.ToString());
value = right.Data;
}
switch (type)
{
case ExpressionType.Equal:
return(creater.Equal(exp, value));
case ExpressionType.NotEqual:
return(creater.NotEqual(exp, value));
case ExpressionType.GreaterThan:
return(creater.Greater(exp, value));
case ExpressionType.LessThan:
return(creater.Less(exp, value));
case ExpressionType.GreaterThanOrEqual:
return(creater.GreaterThan(exp, value));
case ExpressionType.LessThanOrEqual:
return(creater.LessThan(exp, value));
case ExpressionType.And:
return(creater.And(exp, value));
case ExpressionType.Or:
return(creater.Or(exp, value));
default:
throw new CRLException("没有对应的运算方法 " + type);
}
}
