AppSettingsReader AppSettingsReader AppSettingsReader Constructor

定義

AppSettingsReader クラスの新しいインスタンスを初期化します。Initializes a new instance of the AppSettingsReader class.

public:
 AppSettingsReader();
public AppSettingsReader ();
Public Sub New ()

次の例では、 <appSettings>セクションを含む構成ファイルを作成し、をAppSettingsReader使用して、生成された設定を読み取ります。The following example creates a configuration file that contains the <appSettings> section, and then uses the AppSettingsReader to read the settings just generated.

using System;  
using System.Configuration;  
  
class Program  
{  
    static void Main(string[] args)  
    {  
        var reader = new AppSettingsReader();  
  
        var stringSetting = reader.GetValue("String setting", typeof(string));  
        Console.WriteLine("String setting: " + stringSetting);  
  
        var dateTimeSetting = reader.GetValue("DateTime setting", typeof(DateTime));  
        Console.WriteLine("DateTime setting: " + dateTimeSetting);  
  
        try  
        {  
            var missingSetting = reader.GetValue("Int setting", typeof(Int32));  
        }  
        catch (InvalidOperationException e)  
        {  
            Console.WriteLine("Missing key error: " + e.Message);  
        }  
  
        Console.WriteLine("Press any key to continue");  
        Console.ReadKey();  
    }  
}  

次の例では、前の例で使用した構成ファイルを示します。The following example demonstrates a configuration file used by the previous example.

<?xml version="1.0" encoding="utf-8"?>  
<configuration>  
    <appSettings>  
        <add key="String setting" value="String retrieved from App.Config"/>  
        <add key="Date setting" value="Thursday, December 01, 2005 12:53:56 PM"/>  
    </appSettings>  
</configuration>  

適用対象

こちらもご覧ください