使用ConfigurationManager从Web.Config中读取密钥

Question

我试图从Web.config与web层不同的层中读取文件中的键(相同的解决方案)

这是我正在尝试的:

string userName = System.Configuration.ConfigurationManager.AppSettings["PFUserName"];
string password = System.Configuration.ConfigurationManager.AppSettings["PFPassWord"];

这是我appSettings在Web.config文件中:

<configuration>
   ....
   <appSettings>
      <add key="PFUserName" value="myusername"/>
      <add key="PFPassWord" value="mypassword"/>
   </appSettings>
   ....
</configuration>

当我调试的代码username和password只是null,所以它是没有得到键的值.

读这些值我做错了什么？

Answer 1

请尝试使用WebConfigurationManager类.例如:

string userName = WebConfigurationManager.AppSettings["PFUserName"]

Answer 2

  var url = ConfigurationManager.AppSettings["ServiceProviderUrl"];

Answer 3

我发现这个解决方案非常有用.它使用C#4.0 DynamicObject来包装ConfigurationManager.所以不要像这样访问值:

 WebConfigurationManager.AppSettings["PFUserName"]

您将它们作为属性访问:

dynamic appSettings = new AppSettingsWrapper();
Console.WriteLine(appSettings.PFUserName);  

编辑:添加代码片段以防万一链接变得陈旧:

public class AppSettingsWrapper : DynamicObject
{
     private NameValueCollection _items;

    public AppSettingsWrapper()
    {
        _items = ConfigurationManager.AppSettings;
    }

     public override bool TryGetMember(GetMemberBinder binder, out object result)
    {
        result = _items[binder.Name];
        return result != null;
    }
}

Answer 4

如果调用者是另一个项目,则应该在调用者项目中编写配置而不是被调用者.