使用字符串变量作为别名 [英] use a string variable as alias

问题描述

我有一个字符串变量myFieldname.
如何在linq表达式中将其值用作别名?

Hi,
I have a string variable, myFieldname.
How can I use its value as a alias in a linq expression?

string myFieldname = "theName";
var q = (from d in data select new { d.Id, myFieldname = d.Amount });

我希望"theName"成为别名，而不是"myFieldname"本身.

I want ''theName'' be the alias not the ''myFieldname'' itself.

推荐答案

不，您不能那样做.要将变量插入到字符串中然后执行它，需要使用反射.也就是说，将根据"myfieldname"中的值而不是myFieldname中命名的字段检查d.Amount.

No, you can''t do that. To insert a variable in to a string and then execute it, requires the use of reflection. that is to say, d.Amount will be checked against the value in ''myfieldname'', not the field named in myFieldname.

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