c# Unity DI容器不接受带有RegisterType函数的Enum

本文关键字：RegisterType 函数 Enum 不接受 Unity DI | 更新日期: 2023-09-27 17:52:56

见下面的代码

    cont.RegisterType<IBBAConnection, BBAConnection>(ConType.local);
    cont.RegisterType<IBBAConnection, BBAConnection>(ConType.remote);
    cont.RegisterType<IBBAConnection, BBAConnection>(ConType.OrcsWeb);
    cont.RegisterType<IBBAConnection, BBAConnection>(ConType.Sage);

Unity RegisterType不接受enum，但如果我传递字符串，则没有问题发生，但我必须使用enum。我的完整代码如下。所以有人看到我的代码，告诉我在代码中修复什么和哪里，结果enum应该被接受。

public enum ConType { local, remote, OrcsWeb, Sage, };
public interface IBBAConnection
{
    IDbConnection  GetConnection();
    string ConType { get; set; }
}
public class BBAConnection : IBBAConnection
{
    public ConType ConType { get; set; }
    public IDbConnection GetConnection()
    {
        string _connectionString = "";
        IDbConnection connection = null;
        try
        {
            // inside if else logic we fetch connection string from ini file or from any source and inistialize connection.
            if (ConType == ConType.local)
            {
                _connectionString = "put here local db connection";
                connection = new System.Data.SqlClient.SqlConnection(_connectionString);
            }
            else if (ConType == ConType.remote)
            {
                _connectionString = "put here remote db connection";
                connection = new System.Data.SqlClient.SqlConnection(_connectionString);
            }
            else if (ConType == ConType.OrcsWeb)
            {
                _connectionString = "put here website db connection";
                connection = new System.Data.SqlClient.SqlConnection(_connectionString);
            }
            else if (ConType == ConType.Sage)
            {
                _connectionString = "put here sage connection";
                connection = new System.Data.SqlClient.SqlConnection(_connectionString);
            }
            connection.Open();
        }
        catch (Exception ex)
        {
            string strErr = ex.Message;
        }
        return connection;
    }
}
public static class Factory
{
    static IUnityContainer cont = null;
    public static IBBAConnection initialize(ConType oConType)
    {
        IBBAConnection oDbConnection = null;
        cont = new UnityContainer();
        cont.RegisterType<IBBAConnection, BBAConnection>(ConType.local);
        cont.RegisterType<IBBAConnection, BBAConnection>(ConType.remote);
        cont.RegisterType<IBBAConnection, BBAConnection>(ConType.OrcsWeb);
        cont.RegisterType<IBBAConnection, BBAConnection>(ConType.Sage);
        oDbConnection = cont.Resolve<IBBAConnection>(oConType);
        //oDbConnection.ConType = type;
        return oDbConnection;
    }
}

寻找指南，结果Enum应该被接受。

c# Unity DI容器不接受带有RegisterType函数的Enum

我认为你应该这样做。

这将大大降低BBAConnection的复杂性，因为你让你的IConnectionConfig绑定决定你需要的连接字符串。

public interface IConnectionConfig
{
    string GetConnectionString();
}
public class LocalConnectionConfig : IConnectionConfig
{
    public string GetConnectionString()
    {
        return "db connection for local";
    }
}
public class BBAConnection : IBBAConnection 
{ 
    private readonly IConnectionConfig config;
    public BBAConnection(IConnectionConfig config)
    {
        this.config = config;
    }
    public IDbConnection GetConnection()
    {
        string _connectionString = "";
        IDbConnection connection = null;
        try
        {
            connection = new System.Data.SqlClient.SqlConnection(this.config.GetConnectionString());
            connection.Open();
        }
        catch (Exception ex)
        {
            string strErr = ex.Message;
        }
        return connection;
    }
}

注册:

container.RegisterType<IBBAConnection, BBAConnection>();
container.RegisterType<IConnectionConfig, LocalConnectionConfig>();

概念上讲

您通常会让您的构建配置定义您正在使用的配置。然后你可以在你的代码中使用它来定义你需要的配置。

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