c# - 如何从 WinForms 中的 app.config 读取 AppSettings

Question

我通常使用文本文件作为配置。但是这次我想利用 app.config 将文件名(键)与名称(值)相关联，并使名称在组合框中可用

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
   <add key="Scenario1.doc" value="Hybrid1"/>
   <add key="Scenario2.doc" value="Hybrid2"/>
   <add key="Scenario3.doc" value="Hybrid3"/>
</appSettings>
</configuration>

这行得通吗？如何检索数据？

Answer 1

直接来自 docs :

using System.Configuration;

// Get the AppSettings section.        
// This function uses the AppSettings property
// to read the appSettings configuration 
// section.
public static void ReadAppSettings()
{
  try
  {
    // Get the AppSettings section.
    NameValueCollection appSettings = ConfigurationManager.AppSettings;

    // Get the AppSettings section elements.
    Console.WriteLine();
    Console.WriteLine("Using AppSettings property.");
    Console.WriteLine("Application settings:");

    if (appSettings.Count == 0)
    {
      Console.WriteLine("[ReadAppSettings: {0}]",
      "AppSettings is empty Use GetSection command first.");
    }
    for (int i = 0; i < appSettings.Count; i++)
    {
      Console.WriteLine("#{0} Key: {1} Value: {2}",i, appSettings.GetKey(i), appSettings[i]);
    }
  }
  catch (ConfigurationErrorsException e)
  {
    Console.WriteLine("[ReadAppSettings: {0}]", e.ToString());
  }
}

因此，如果您想访问设置 Scenario1.doc，您可以这样做:

var value = ConfigurationManager.AppSettings["Scenario1.doc"];

编辑:

正如 Gabriel GM 在评论中所说，您必须添加对 System.Configuration 的引用。