如何使用此 C# 代码制作子例程？

Question

我有以下 C# 代码，并且在我的代码中重复使用了大约 20 倍。我不知道如何将它变成一个允许我重复使用它的子例程，因为对象的类型每次都基于不同的类。

代码的目的是发送一个 HTTP 请求，收集 JSON 响应，然后将 JSON（使用 DataContract）序列化为一个类以用于其他领域。

这是我得到的：

    public static ResponseAttachmentIds MakeRequestAttachmentId(string requestUrl, string strToken)
    {
        try
        {
            HttpWebRequest request = WebRequest.Create(requestUrl) as HttpWebRequest;
            request.Headers["Authorization"] = "OAuth " + strToken;
            using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
            {
                if (response.StatusCode != HttpStatusCode.OK)
                    throw new Exception(String.Format(
                    "Server error (HTTP {0}: {1}).",
                    response.StatusCode,
                    response.StatusDescription));
                DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(typeof(ResponseAttachmentIds));
                object objResponse = jsonSerializer.ReadObject(response.GetResponseStream());
                ResponseAttachmentIds jsonResponse = objResponse as ResponseAttachmentIds;
                response.Close();
                return jsonResponse;
            }
        }
        catch (Exception e)
        {
            System.Windows.Forms.MessageBox.Show(e.Message);
            return null;
        }

    }

用于此特定用途的 DataContract 类是：

public class ResponseAttachmentIds
{
    [DataMember(Name = "done")]
    public bool attachmentIds_done;
    [DataMember(Name = "records")]
    public List<ResponseAttachmentId> attachmentIds_records;
}
[DataContract]
public class ResponseAttachmentId
{
    [DataMember(Name = "Id")]
    public string attachmentId_strId { get; set; }
    [DataMember(Name = "Image_Attachment_Id__c")]
    public string attachmentId_strAttachmentId { get; set; }
}

问题是我也为大约 20 个不同的类设置了相同的设置，例如 ResponseImages、ResponseProperties、ResponseProperty 等。

有什么帮助吗？

Answer 1

我相信您想要的是这样的通用方法：

public static T MakeRequestAttachmentId<T>(string requestUrl, string strToken) where T : class
    {
        try
        {
            HttpWebRequest request = WebRequest.Create(requestUrl) as HttpWebRequest;
            request.Headers["Authorization"] = "OAuth " + strToken;
            using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
            {
                if (response.StatusCode != HttpStatusCode.OK)
                    throw new Exception(String.Format(
                    "Server error (HTTP {0}: {1}).",
                    response.StatusCode,
                    response.StatusDescription));
                DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(typeof(T));
                object objResponse = jsonSerializer.ReadObject(response.GetResponseStream());
                var jsonResponse = (T)objResponse;
                response.Close();
                return jsonResponse;
            }
        }
        catch (Exception e)
        {
            System.Windows.Forms.MessageBox.Show(e.Message);
            return default(T);
        }

    }

你可以这样称呼它：

MakeRequestAttachmentId<ResponseAttachmentIds>("", "");

Answer 2

我会更改方法以使用泛型。比如……

public static T MakeResponseObject<T>(string requestUrl, string strToken)
{
    try
    {
        HttpWebRequest request = WebRequest.Create(requestUrl) as HttpWebRequest;
        request.Headers["Authorization"] = "OAuth " + strToken;
        using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
        {
            if (response.StatusCode != HttpStatusCode.OK)
                throw new Exception(String.Format(
                "Server error (HTTP {0}: {1}).",
                response.StatusCode,
                response.StatusDescription));
            DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(typeof(T));
            object objResponse = jsonSerializer.ReadObject(response.GetResponseStream());
            var jsonResponse = objResponse as T;
            response.Close();
            return jsonResponse;
        }
    }
    catch (Exception e)
    {
        System.Windows.Forms.MessageBox.Show(e.Message);
        return null;
    }
}