C# 如何从 app.config 访问 VS2012 WPF 应用程序中的连接字符串？
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How to access connection string in VS2012 WPF application from app.config?
提问by
I am using VS2012. I have to keep connection string in app.config and have to access it from my cs file. But I am unable to do it in VS2012. Following is what I have found from net but I think it works on earlier version of VS not on VS2012.
我正在使用 VS2012。我必须在 app.config 中保留连接字符串，并且必须从我的 cs 文件中访问它。但我无法在 VS2012 中做到这一点。以下是我从网上找到的内容，但我认为它适用于早期版本的 VS，而不适用于 VS2012。
app.config file
app.config 文件
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>
<connectionStrings>
<add name="DataFormConnection"
connectionString="Data Source=abcdd;database=xyz;uid=4566;pwd=987"
providerName="System.Data.SqlClient" />
</connectionStrings>
</configuration>
How I am accessing it:
我如何访问它：
connectionString = ConfigurationManager.ConnectionStrings["DataFormConnection"].ConnectionString;
Getting error: type or name does not exist in System.Configuration.ConfiguarationSettings
获取错误：System.Configuration.ConfiguarationSettings 中不存在类型或名称
采纳答案by misleadingTitle
Go to references, and add a reference to System.Configuration.
转到引用，并添加对System.Configuration.
回答by Sachin
Go to References, and add a reference to System.Configuration
转到References，并添加对System.Configuration
Once you have done this, you should be able to reference System.Configuration.ConfigurationManager.
完成此操作后，您应该可以参考System.Configuration.ConfigurationManager.
