Multipart form value post in api in C# ASP.NET web application

Question

1.00/5 (2 votes)

See more:

Method for post api call:
string xml = "";
string Type = "", EventName = "", EventPath = "", UserName = "", Password = "";

Type = "POST";
EventName = "PREAPPROVALSUBMISSION";
EventPath = "https://www.devapi.anoudapps.com/api/medical/hospital-service/v3/pre-approval";
UserName = "nova_api";
Password = "nova_api123";

ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;

var encoding = System.Text.Encoding.GetEncoding("ISO-8859-1");
byte[] headerBytes = encoding.GetBytes(UserName + ":" + Password);
string headerValue = Convert.ToBase64String(headerBytes);

CookieContainer cookies = new CookieContainer();

HttpWebRequest webRequest = (HttpWebRequest)HttpWebRequest.Create(EventPath);
webRequest.Credentials = new NetworkCredential(UserName, Password);
webRequest.Method = Type;
webRequest.Headers.Add("company", "009");
webRequest.Headers.Add("Authorization", "Basic " + headerValue);
webRequest.ContentType = "multipart/form-data";
webRequest.CookieContainer = cookies;
webRequest.KeepAlive = true;

webRequest.Accept = "application/json";

//please use below data for post
var formdata = "{{\"policyNo\":\"P2209000174\"}, {\"memberId\":\"MEM21341411\"},
{\"category\":\"001\"},{\"illness\":\"001\"},{\"priority\":\"2\"},
{\"primaryDiagnosis\":\"R93.421\"},{\"medicalRecordNo\":\"0115731\"},{\"serviceType\":\"O\"},
{\"admissionType\":\"M\"},{\"visitDate\":\"19/02/2023\"},{\"doctorLicenseNo\":\"D8622\"}
{\"currency\":\"QAR\"},{\"mobileNo\":\"55849898\"},{\"illnessDetails\":\"follow up after
treatment of UTI\"},{\"treatmentsData\":\"
{\"treatType\":\"O\",\"treatCode\":\"51741\",\"quantity\":\"1\",\"treatDesc\":\"Urine flow
study\",\"estimatedAmount\":\"600.0000\",\"remarks\":\"\"},
{\"treatType\":\"O\",\"treatCode\":\"74183\",\"quantity\":\"1\",\"treatDesc\":\"MRI Abdomen
without and with contrast \",\"estimatedAmount\":\"3450.0000\",\"remarks\":\"\"},
{\"treatType\":\"O\",\"treatCode\":\"99242\",\"quantity\":\"1\",\"treatDesc\":\"Consultation -
Specialist (All)\",\"estimatedAmount\":\"300.0000\",\"remarks\":\"\"}\"}
{\"visitNo\":\"6461204\"},{\"medicalHistory\":\"Diabetes, dyslipidemia\"}}";

string inputJson = (new JavaScriptSerializer()).Serialize(formdata);
using (var streamWriter = new StreamWriter(webRequest.GetRequestStream()))
{
streamWriter.Write(inputJson);
streamWriter.Flush();
streamWriter.Close();

var webResponse = (HttpWebResponse)webRequest.GetResponse();

using (StreamReader streamReader = new StreamReader(webResponse.GetResponseStream()))
{
DataSet dsXml = new DataSet();
xml = streamReader.ReadLine();
StringReader sr = new StringReader(xml);
dsXml.ReadXml(sr);
if (dsXml.Tables[0].Rows.Count > 0)
{
if (common.myStr(dsXml.Tables[0].Rows[0]["messageType"]) != "S")
{
Alert.ShowAjaxMsg("Invalid Qatar Id", Page);
return;
}
}
dsXml.Dispose();
}

}

What I have tried:

Error throw: HTTP Validation: unparsable request content Details:No boundary define for multipart request

Posted 6-Mar-23 17:28pm

jiten mutum

Updated 6-Mar-23 23:23pm

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard Deeming · Answer 1 · 2023-03-06T23:23:00

Solution 1

We have no idea what data the remote service is expecting, so all we can do is guess.

You have a string variable called formdata which contains pre-serialized JSON. You then serialize that already-serialized variable again, and send that doubly-serialized data to the service.

It's highly likely that the service expects you to pass in the JSON, rather than a JSON-encoded string containing JSON.

C#

...

// Don't need to serialize again:
// string inputJson = (new JavaScriptSerializer()).Serialize(formdata);

using (var streamWriter = new StreamWriter(webRequest.GetRequestStream()))
{
    streamWriter.Write(formdata);
    streamWriter.Flush();
    streamWriter.Close();

    ...

Posted 6-Mar-23 23:23pm

Richard Deeming

Comments

jiten mutum 11-Mar-23 22:52pm

Below are the credentials for posting. you can try in Postman.
Type = "POST";
EventName = "PREAPPROVALSUBMISSION";
EventPath = "https://www.devapi.anoudapps.com/api/medical/hospital-service/v3/pre-approval";
UserName = "nova_api";
Password = "nova_api123";

below are data you can use in postman:
var formdata = "{{\"policyNo\":\"P2209000174\"}, {\"memberId\":\"MEM21341411\"},
{\"category\":\"001\"},{\"illness\":\"001\"},{\"priority\":\"2\"},
{\"primaryDiagnosis\":\"R93.421\"},{\"medicalRecordNo\":\"0115731\"},{\"serviceType\":\"O\"},
{\"admissionType\":\"M\"},{\"visitDate\":\"19/02/2023\"},{\"doctorLicenseNo\":\"D8622\"}
{\"currency\":\"QAR\"},{\"mobileNo\":\"55849898\"},{\"illnessDetails\":\"follow up after
treatment of UTI\"},{\"treatmentsData\":\"
{\"treatType\":\"O\",\"treatCode\":\"51741\",\"quantity\":\"1\",\"treatDesc\":\"Urine flow
study\",\"estimatedAmount\":\"600.0000\",\"remarks\":\"\"},
{\"treatType\":\"O\",\"treatCode\":\"74183\",\"quantity\":\"1\",\"treatDesc\":\"MRI Abdomen
without and with contrast \",\"estimatedAmount\":\"3450.0000\",\"remarks\":\"\"},
{\"treatType\":\"O\",\"treatCode\":\"99242\",\"quantity\":\"1\",\"treatDesc\":\"Consultation -
Specialist (All)\",\"estimatedAmount\":\"300.0000\",\"remarks\":\"\"}\"}
{\"visitNo\":\"6461204\"},{\"medicalHistory\":\"Diabetes, dyslipidemia\"}}";

I have try without Serialize code you mention but still same error.
please try in postman and please share solution.