从配置文件中读取密钥

本文关键字：密钥 读取 配置文件 | 更新日期: 2023-09-27 17:52:12

我有一个配置文件，其中包含:

    <add key="x36_key1" value="D1"/>
    <add key="x36_key2" value="D2"/>
    <add key="x36_key3" value="D3"/>
    <add key="x36_key4" value="D4"/>
    <add key="x36_key5" value="D5"/>

现在我需要这些键在这里使用:

   case Keys.D1:
          //something happens here
        break;
   case Keys.D2:
          //something happens here
        break;
   case Keys.D3:
          //something happens here
        break;
   case Keys.D4:
          //something happens here
        break;
   case Keys.D5:
          //something happens here
        break;

我从每个键中提取值的方式如下:

string key1 = System.Configuration.ConfigurationManager.AppSettings["x36_key1"];

但是因为它是一个字符串，所以不能用作键。

我如何使代码读取在配置文件中定义的键?

从配置文件中读取密钥

您应该将字符串解析为enum Keys (msdn):

string key1 = System.Configuration.ConfigurationManager.AppSettings["x36_key1"];
Keys key;
if (Enum.TryParse<Keys>(key1, out key))
{
    switch (key)
    {
        case Keys.D1:
            //something happens here
            break;
        case Keys.D2:
            //something happens here
            break;
        case Keys.D3:
            //something happens here
            break;
        case Keys.D4:
            //something happens here
            break;
        case Keys.D5:
            //something happens here
            break;
    }
}

string key1 = System.Configuration.ConfigurationManager.AppSettings["x36_key1"];
Keys k1 = (Keys)Enum.Parse(typeof(Keys), key1);

更新

使用enums .Parse()将配置中的字符串解析为Keys enum:

var keyFromConfiguration = System.Configuration.ConfigurationManager.AppSettings["x36_key1"];
Keys key = (Keys) Enum.Parse(typeof(Keys), keyFromConfiguration);
switch (key)
    {
        case Keys.D1:
            //something happens here
            break;
        case Keys.D2:
            //something happens here
            break;
        case Keys.D3:
            //something happens here
            break;
        case Keys.D4:
            //something happens here
            break;
        case Keys.D5:
            //something happens here
            break;
    }
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