没有代码重复的故障转移冗余？

Question

我将数据提交给我偶尔会失去联系的网络服务（我国的互联网并不是很好）。

Web服务具有主端点和故障转移端点。

我主要通过复制与Web服务交互的代码来处理连接错误。与我合作的价值观真的很重要，为了让这个例子尽可能简单，我已经删除了很多复杂性。

private bool _testing = true;

protected async void GetPatient_Click(object sender, EventArgs e)
{
    if (_testing)
    {
        await SendTestRequestToWebService(foo, bar);
    }
}

private async Task SendTestRequestToWebService(string foo, string bar)
{
    try
    {
        using (var client = Service.ServiceGatewayClient())
        {
            // Do stuff on the service.
            var response = client.Operation(foo, bar);
            ParseServiceResponse(response);
        }
    }
    catch (System.ServiceModel.EndpointNotFoundException ex)
    {
        // Couldn't connect to the service, failover to the backup.
        using (var client = ServiceFailover.ServiceGatewayClient())
        {
            // Do stuff on the service.                
            var response = client.Operation(foo, bar);
            ParseFailoverServiceResponse(response);
        }
    }
}

private void ParseServiceResponse(Service.OperationResponse response)
{
    // Do stuff with the response from the service operation.
}

private void ParseFailoverServiceResponse(ServiceFailover.OperationResponse response)
{
    // Do stuff with the response from the failover service operation.
    // This code is identical to what's in ParseServiceResponse,
    // only difference is the parameter type.
}

因此try和catch块基本相同，解析函数也是如此，但所有这些中使用的对象类型都不同。

是否有更直观的方法可以在不重复代码的情况下考虑不同的类型？

修改

这是解析函数中常见逻辑的一个例子：

    private void ParseFailoverResponse(ServiceFailover.OperationResponse response)
{
    // The payload is just a string containing delimited data returned by the service.
    var payload = response.ResponsePayload;

    if (payload.Contains("NODATA"))
    {
        ResultMessage.Text = "No data was returned by the service request.";
    }
    else
    {
        var _response = ParseResponseRecord(response.responsePayload);
        if (_response.ResultCode == MSVResultCode.Invalid)
        {
            ResultMessage.Text = _response.Result;
            ResultMessage.CssClass = "text-danger";
        }
        else if (_response.ResultCode == MSVResultCode.Valid)
        {
            var _payload = payload.Split(new[] { Environment.NewLine }, StringSplitOptions.None);
            // List patients and main member as returned by the medical aid.
            // If none are returned, prompt the user to add the patient manually.
            var patients = ParsePatientRecords(_payload);
            PatientsRepeater.DataSource = patients;
            PatientsRepeater.DataBind();

            ResultPanel.Visible = true;
        }
    }
}

Answer 1

为什么你不能只有一个回复？

public class Response
{
}
public abstract class GetResponseBase
{
    public abstract Response GetResponse();
}
public class GetResponsePrimary : GetResponseBase
{
    public override Response GetResponse()
    {
        return new Response();
    }
}
public class GetResponseSecondary : GetResponseBase
{
    public override Response GetResponse()
    {
        return new Response();
    }
}