将字符追加到列表字符串 [英] Appending characters to a List string

问题描述

我在应用程序中有一个可选的自定义前缀和后缀，我想将其添加到字符串列表中的每个项目中.我尝试了以下所有方法，但均无效果.有人可以指出我正确的方向吗?

I have an optional custom prefix and suffix in my application, that I want to add to each of the items in my string List. I have tried all of the following and none are working. Can someone point me in the right direction please?

List<string> myList = new List<string>{ "dog", "cat", "pig", "bird" };

string prefix = "my ";
string suffix = " sucks!";

StringBuilder sb = new StringBuilder();
sb.Append(suffix);
sb.Insert(0, prefix);
MyList = sb.ToString();  //This gives me red squigglies under sb.ToString();

我也尝试过:

myList = myList.Join(x => prefix + x + suffix).ToList();  //Red squigglies

和:

sortBox1.Join(prefix + sortBox1 + suffix).ToList();  //Red squigglies

我在哪里错了?

推荐答案

目前尚不清楚为什么在这里使用StringBuilder，或者为什么要进行联接.听起来像是您想要的:

It's not really clear why you're using a StringBuilder at all here, or why you'd be trying to do a join. It sounds like you want:

var suckingList = myList.Select(x => "my " + x + " sucks")
                        .ToList();

这是使用LINQ对列表中的每个项目进行投影的绝对正常方法.

This is the absolutely normal way of performing a projection to each item in a list using LINQ.

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