AppSettingsReader 类
定义
提供一种从配置文件中读取特定类型的值的方法。Provides a method for reading values of a particular type from the configuration.
public ref class AppSettingsReader
public class AppSettingsReader
type AppSettingsReader = class
Public Class AppSettingsReader
- 继承
-
AppSettingsReader
示例
下面的示例创建一个包含节的配置文件 <appSettings> ,然后使用 AppSettingsReader 读取刚刚生成的设置。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();
}
}
下面的示例演示上一示例所使用的配置文件。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>
构造函数
| AppSettingsReader() |
初始化 AppSettingsReader 类的新实例。Initializes a new instance of the AppSettingsReader class. |
方法
| Equals(Object) |
确定指定对象是否等于当前对象。Determines whether the specified object is equal to the current object. (继承自 Object) |
| GetHashCode() |
作为默认哈希函数。Serves as the default hash function. (继承自 Object) |
| GetType() |
获取当前实例的 Type。Gets the Type of the current instance. (继承自 Object) |
| GetValue(String, Type) |
从 AppSettings 属性中获取指定键的值,并返回指定类型的对象,该对象包含来自配置文件的值。Gets the value for a specified key from the AppSettings property and returns an object of the specified type containing the value from the configuration. |
| MemberwiseClone() |
创建当前 Object 的浅表副本。Creates a shallow copy of the current Object. (继承自 Object) |
| ToString() |
返回表示当前对象的字符串。Returns a string that represents the current object. (继承自 Object) |