为什么我的字典为字符串添加额外的转义字符？ [英] Why is my Dictionary adding extra escape characters to a string?

问题描述

App.config：

App.config:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key="1" value="An error occured.\r\nPlease try again later." />
  </appSettings>
</configuration>

代码：

Dictionary<string, string> keyValuePairs = new Dictionary<string, string>();
string key = "1";

keyValuePairs.Add(key, ConfigurationManager.AppSettings["key"]);

if (keyValuePairs.ContainsKey(key))
{
  // when I hover over the object, keyValuePairs, in my debugger, I see, "An error occured.\r\nPlease try again later."
  string value1 = keyValuePairs[key];
  // now when I hover over the local variable, value, I see, "An error occured.\\r\\nPlease try again later."
}

我很好奇上述代码为什么添加了转义字符到\\\\来使它成为\\\\

我也喜欢知道如何避免获得额外的\字符。

I'd also like to know how to avoid getting the extra "\" characters.

推荐答案

从app.config中读取字符串，我认为它类似于以下内容：

If you are reading the string from the app.config, I assume it's something like the following:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key="errorString" value="An error occured.\r\nPlease try again later."/>
  </appSettings>
</configuration>

在这种情况下，您的示例代码应如下所示：

In which case your sample code should look like this:

keyValuePairs.Add("1", @"An error occured.\r\nPlease try again later.");

从那里应该是显而易见的为什么调试器正在显示（特别是如果你读< a href =https://stackoverflow.com/questions/3632130/why-is-my-dictionary-adding-extra-escape-characters-to-string/3632148#3632148> JaredPar的答案。

And from there it should be obvious why the debugger is displaying as it does (especially if you read JaredPar's answer.

您最好使用资源字典存储字符串，这很容易让您在VS编辑器中插入换行符。

You're better off using a resource dictionary for storing the string, which will easily let you insert newline characters in the VS editor.

编辑：我试过了以下内容：

Just on a whim, I tried the following:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key="errorString" value="An error occured.
Please try again later."/>
  </appSettings>
</configuration>

编译好并产生正确的结果。

Compiled fine and produced the correct results.

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