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标题: c# - xamarin，向服务器读取发布请求(带参数) [打印本页]

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作者: 菜鸟教程小白    时间: 2022-12-13 02:22
标题: c# - xamarin，向服务器读取发布请求(带参数)

我正在尝试从 Xamarin(webview 应用程序)发送请求。刚才，我正在使用带有 POST 方法的简单表单从客户端发送请求。 收到请求的人:

bool HandleShouldStartLoad (UIWebView webView, NSUrlRequest request, UIWebViewNavigationType navigationType)
{
            var resources = request.Url.ResourceSpecifier.Split ('?');
            var method = resources [0];
            if(method == "test")
            {
                        //TODO
            }
}

刚才，我可以将参数读取为 URL，但是由于某种原因，我无法读取使用 POST 方法发送的表单数据。 如何获取请求中的键和值？

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Best Answer-推荐答案

我找到了答案，我找到的唯一方法是: 如果您需要向远程服务器发出请求，您可以使用以下方法:

您的 View.cshtml

<form action="http://myaddress:3000/upload" enctype="multipart/form-data" method="post">
<input type="text" name="email" />
<input type="text" name="email" />
<input type="submit" />
</form>

这里你可以使用 Post 或 Get 方法，但如果你需要先处理数据，你可以使用:

<form action="hybrid:RegisterUser" enctype="multipart/form-data" method="GET">
                <input type="email" name="email"  required="required" placeholder="[email protected]" class="input-register" required="required"/>
                <input type="password" name="password" placeholder="assword" class="input-register" required="required"/>
                <br />
                <input type="submit" class="btn" value="Register" />
            </form>

您的 HybridViewController.cs

if (method == "RegisterUser") 
{
                RequestProcessor rp = new RequestProcessor();
                var parameters = System.Web.HttpUtility.ParseQueryString (resources [1]);
                Dictionary<string,string> requestParams = new Dictionary<string,string> ();
                string email = parameters["email"];
                requestParams.Add ("email", email )
                rp.HttpPostRequest("users/add", requestParams);
                rp.HttpGetRequest("users/add?email" + email);
}

**你的 RequestProcessor.cs **

public string HttpPostRequest(string url, Dictionary<string,string> postParameters)
        {
            url = "http://Mydomain:3000/" + url;
            string postData = "";
            foreach (string key in postParameters.Keys)
            {
                postData += HttpUtility.UrlEncode(key) + "="
                    + HttpUtility.UrlEncode(postParameters[key]) + "&";
            }

            HttpWebRequest myHttpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
            myHttpWebRequest.Method = "OST";
            byte[] data = System.Text.Encoding.ASCII.GetBytes(postData);
            myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";
            myHttpWebRequest.ContentLength = data.Length;
            Stream requestStream = myHttpWebRequest.GetRequestStream();
            requestStream.Write(data, 0, data.Length);
            requestStream.Close();
            HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
            Stream responseStream = myHttpWebResponse.GetResponseStream();
            StreamReader myStreamReader = new StreamReader(responseStream, System.Text.Encoding.Default);
            string pageContent = myStreamReader.ReadToEnd();
            myStreamReader.Close();
            responseStream.Close();
            myHttpWebResponse.Close();
            return pageContent;
        }

        public string HttpGetRequest(string Url)
        {
            string Out = String.Empty;
            Url = "http://Mydomain:3000/" + Url;
            System.Net.WebRequest req = System.Net.WebRequest.Create(Url);
            try
            {
                System.Net.WebResponse resp = req.GetResponse();
                using (System.IO.Stream stream = resp.GetResponseStream())
                {
                    using (System.IO.StreamReader sr = new System.IO.StreamReader(stream))
                    {
                        Out = sr.ReadToEnd();
                        sr.Close();
                    }
                }
            }
            catch (ArgumentException ex)
            {
                Out = string.Format("HTTP_ERROR :: The second HttpWebRequest object has raised an Argument Exception as 'Connection' Property is set to 'Close' :: {0}", ex.Message);
            }
            catch (WebException ex)
            {
                Out = string.Format("HTTP_ERROR :: WebException raised! :: {0}", ex.Message);
            }
            catch (Exception ex)
            {
                Out = string.Format("HTTP_ERROR :: Exception raised! :: {0}", ex.Message);
            }

            return Out;
        }

关于c# - xamarin，向服务器读取发布请求(带参数)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26135148/

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