c# -使用HttpWebRequest发送byte[]作为json对象的一部分

本文关键字：json 作为 对象 一部分 使用 HttpWebRequest 发送 byte | 更新日期: 2023-09-27 18:08:09

我试图将json对象作为post数据的一部分发送到web api。一些json值可以是byte[]。这有可能吗?如果有，怎么做?

下面是我的代码: 
public static dynamic ExecuteAndReturn(string url, string contentType, string requestType, Dictionary<string, object> parameters)
    {
        try
        {
            System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url);
            string postData = "";
            if (contentType.Contains("json"))
                postData += "{";
            foreach (string key in parameters.Keys)
            {
                object value = parameters[key];
                if (value.GetType() == typeof(bool))
                    value = value.ToString().ToLower();
                else if (value.GetType() == typeof(byte[]))
                    value = //What to do
                if (contentType.Contains("json"))
                    postData += HttpUtility.UrlEncode(key) + ":" + HttpUtility.UrlEncode(value.ToString()) + ",";
                else
                    postData += HttpUtility.UrlEncode(key) + "=" + HttpUtility.UrlEncode(value.ToString()) + "&";
            }
            if (contentType.Contains("json"))
            {
                if (postData.Length > 1)
                    postData = postData.Substring(0, postData.Length - 1);
                postData += "}";
            }
            byte[] data = Encoding.ASCII.GetBytes(postData);
            request.ContentLength = data.Length;
            request.ContentType = contentType;
            request.Method = requestType;
            request.CookieContainer = new System.Net.CookieContainer();
            foreach (string key in HttpContext.Current.Request.Cookies)
            {
                HttpCookie cookie = HttpContext.Current.Request.Cookies[key];
                request.CookieContainer.Add(new System.Net.Cookie(cookie.Name, cookie.Value, cookie.Path, new Uri(url).Host));
            }
            using (var sr = request.GetRequestStream())
            {
                sr.Write(data, 0, data.Length);
                sr.Close();
            }
            System.Net.WebResponse response = request.GetResponse();
            using (var sr = new System.IO.StreamReader(response.GetResponseStream()))
            {
                string json = sr.ReadToEnd();
                System.Text.RegularExpressions.Regex r = new System.Text.RegularExpressions.Regex("'''"__type'''":'''"[a-zA-Z]+[''.]*[a-zA-Z]+'''",");
                foreach (System.Text.RegularExpressions.Match match in r.Matches(json))
                {
                    json = json.Replace(match.Value, "");
                }
                return (new JavaScriptSerializer()).Deserialize<dynamic>(json);
            }
        }
        catch (System.Net.WebException exception)
        {
            System.Net.HttpWebResponse errorResponse = (System.Net.HttpWebResponse)exception.Response;
            System.IO.Stream resst = errorResponse.GetResponseStream();
            System.IO.StreamReader sr = new System.IO.StreamReader(resst);
            string text = sr.ReadToEnd();
            return new { Error = text };
        }
    }

调用函数看起来像这样:

ExecuteAndReturn(
            Objects.SiteContext.Settings["Some_Url"].Value + "/SignOut",
            "application/json; charset=UTF-8",
            "POST",
            new Dictionary<string, object>()
            {
                { "userName", someByte[] },
                { "key", anotherByte[] }
            });

在这里赋值时，byte[]的值应该是什么? 

 foreach (string key in parameters.Keys)
            {
                object value = parameters[key];
                if (value.GetType() == typeof(bool))
                    value = value.ToString().ToLower();
                else if (value.GetType() == typeof(byte[]))
                    value = //this should be the byte[] value, what to do
                if (contentType.Contains("json"))
                    postData += HttpUtility.UrlEncode(key) + ":" + HttpUtility.UrlEncode(value.ToString()) + ",";
                else
                    postData += HttpUtility.UrlEncode(key) + "=" + HttpUtility.UrlEncode(value.ToString()) + "&";
            }

c# -使用HttpWebRequest发送byte[]作为json对象的一部分

如果您无法在服务器端编码为正常字符串并解码，请尝试使用json格式的字符串。

    byte[] value = new byte[] { 255, 255, 255, 255 };
    string strValue = "[ ";
    for (int i = 0; i < value.Length; i++)
        strValue += (i == 0 ? "" : ", ") + value[i].ToString();
    strValue += " ]";
    // strValue == "[ 255, 255, 255, 255 ]"
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