public void 表达式测试()
{
LockPers lpmodel = new LockPers()
{
IsDel = false, Prompt = "测试xxxxxx"
};
Users umodel = new Users()
{
UserName = "******"
};
//Expression<Func<LockPers, Users, object>> fiesExps = (lp, u) => new { a2 = SM.AppendSql(lp.Prompt), len = "LENGTH(a.Prompt)" };
//LambdaExpression fieslambda = fiesExps as LambdaExpression;
//Delegate fiesdlg = fieslambda.Compile();
//var o = fiesdlg.DynamicInvoke(lpmodel, umodel);
//ParameterExpression fp1 = fieslambda.Parameters[0];
//NewExpression fiesnew = fieslambda.Body as NewExpression;
//ConstructorInfo fnc = fiesnew.Constructor;
//var newargs1 = fiesnew.Arguments.First();
//MethodCallExpression method = newargs1 as MethodCallExpression;
//var methodarg1 = method.Arguments[0];
//MemberExpression meb = methodarg1 as MemberExpression;
//var mebexp1 = meb.Expression;
//ParameterExpression param1 = mebexp1 as ParameterExpression;
// ####################
Expression <Func <LockPers, Users, bool> > boolExps2 = (lp, u) => SM.AppendSql2(lpmodel.Prompt) && u.UserName == umodel.UserName;
LambdaExpression boolambda2 = boolExps2 as LambdaExpression;
BinaryExpression bexp2 = boolambda2.Body as BinaryExpression;
MethodCallExpression mebleft2 = bexp2.Left as MethodCallExpression;
var mebleft2Arg1 = mebleft2.Arguments[0] as MemberExpression;
var mebleft2Arg1Params1 = mebleft2Arg1.Expression as ParameterExpression;
//AnalysisExpression.GetMemberValue
// ####################
//Expression<Func<LockPers, Users, bool>> boolExps= (lp, u) => lp.Prompt == lpmodel.Prompt && u.UserName == umodel.UserName;
//LambdaExpression boolambda = boolExps as LambdaExpression;
//BinaryExpression bexp = boolambda.Body as BinaryExpression;
//BinaryExpression binarygleft = bexp.Left as BinaryExpression;
//MemberExpression constMember = binarygleft.Right as MemberExpression; //右边变量名 constMember.Member.Name
//MemberExpression constMember2 = constMember.Expression as MemberExpression; //右边变量所在的类
//ConstantExpression constant = constMember2.Expression as ConstantExpression; //右边变量所在的类
//var constValue = constant.Value.GetType().GetField(constMember2.Member.Name).GetValue(constant.Value);
return;
}