LINQPad中如何模拟ConfigurationManager

Question

我正在尝试在 LINQPad 中测试一些代码。但是，base class 调用配置管理器。在 LINQPad 中测试时如何模拟它。

void Main()
{
    var tRepo = new TestRepository();
    var result = tRepo.GetAsync(1);
    result.Dump();
}

public partial class TestRepository : BaseRepository<Customer>, ICustomerRepository 
{
    // Here base throws the errror
    public TestRepository() : base("DbConnString")
    {            
    }
}

这是 BaseRepository 的构造函数（来自已编译的 DLL，因此在 LINQPad 中不可编辑）：

protected BaseRepository(string connectionStringName)
{
    var connectionString = ConfigurationManager.ConnectionStrings[connectionStringName];

    Connection = new SqlConnection(connectionString.ConnectionString);
    Connection.Open();
}

Answer 1

可以在 LinqPad 网站常见问题解答中找到答案

http://www.linqpad.net/faq.aspx

I'm referencing a custom assembly that reads settings from an application configuration file (app.config). Where should I put my application config file so that LINQPad queries will pick it up?

Create a file called linqpad.config in the same folder as LINQPad.exe and put your configuration data there. Don't confuse this with linqpad.exe.config:

•linqpad.exe.config is for the LINQPad GUI

•linqpad.config is for your queries.

Answer 2

可能对你有用的东西，我前段时间创建的。

这是一种扩展方法，您可以使用它来强制从特定文件重新加载配置。它使用反射来更改管理器中的私有字段，清除配置，然后有条件地重新加载它。比手动编辑 LINQPad 的配置文件要容易得多。

public static void ForceNewConfigFile(this Type type, bool initialize = true)
{
    var path = type.Assembly.Location + ".config";
    if (!File.Exists(path))
        throw new Exception("Cannot find file " + path + ".");

    AppDomain.CurrentDomain.SetData("APP_CONFIG_FILE", path);

    var typeOfConfigManager = typeof(ConfigurationManager);
    typeOfConfigManager.GetField("s_initState", BindingFlags.NonPublic | BindingFlags.Static).SetValue(null, 0);
    typeOfConfigManager.GetField("s_configSystem", BindingFlags.NonPublic | BindingFlags.Static).SetValue(null, null);

    var typeOfClientConfigPaths = typeOfConfigManager.Assembly.GetTypes().Where(x => x.FullName == "System.Configuration.ClientConfigPaths").Single();
    typeOfClientConfigPaths.GetField("s_current", BindingFlags.NonPublic | BindingFlags.Static).SetValue(null, null);

    if (initialize)
    {
        var dummy = ConfigurationManager.AppSettings;
    }
}

用法示例：

typeof(SomeType).ForceNewConfigFile();

System.Configuration.ConfigurationManager.AppSettings.Dump();

SomeType 只是程序集中包含的一种类型，它将用作配置文件位置的来源。假设是：配置文件存在于 DLL 文件旁边并命名为 {Assembly.Location}.config.

LINQPad中如何模拟ConfigurationManager

How to simulate ConfigurationManager in LINQPad

c#

linqpad