I POST to website's JSON-response URL using WebBrowser.Navigate()
.
All goes well, including the webBrowser1_DocumentCompleted()
event handler being called.
But instead of getting a "quiet" response (e.g. webBrowser1.Document
) that I can handle programmatically, I receive a File Download dialog box:
If I click the Save
button and later examine the file, it contains exactly the JSON response that I expect.
But I want the program capture this JSON response in-code, without displaying that dialog and having to click the Save
button.
How do I capture JSON response using WebBrowser control?
Note: before posting this question I searched SO and all I found was a similar question for which the accepted answer doesn't really explain how to do this (I'm already handling webBrowser1_DocumentCompleted). Any tips?
Update: All my searches so far yielded nothing in regard to using WebBrowser control to fetch JSON responses. Perhaps I am approaching this completely wrong? What am I missing?
Don't use WebBrowser
for JSON communication. Use WebRequest instead:
//
// EXAMPLE OF LOGIN REQUEST
//
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
// Create a request using a URL that can receive a post.
WebRequest request = WebRequest.Create("http://getting-started.postaffiliatepro.com/scripts/server.php");
// Set the Method property of the request to POST.
request.Method = "POST";
// Create POST data and convert it to a byte array.
//WRITE JSON DATA TO VARIABLE D
string postData = "D={\"requests\":[{\"C\":\"Gpf_Auth_Service\", \"M\":\"authenticate\", \"fields\":[[\"name\",\"value\"],[\"Id\",\"\"],[\"username\",\"[email protected]\"],[\"password\",\"ab9ce908\"],[\"rememberMe\",\"Y\"],[\"language\",\"en-US\"],[\"roleType\",\"M\"]]}], \"C\":\"Gpf_Rpc_Server\", \"M\":\"run\"}";
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
// Set the ContentType property of the WebRequest.
request.ContentType = "application/x-www-form-urlencoded";
// Set the ContentLength property of the WebRequest.
request.ContentLength = byteArray.Length;
// Get the request stream.
Stream dataStream = request.GetRequestStream();
// Write the data to the request stream.
dataStream.Write(byteArray, 0, byteArray.Length);
// Close the Stream object.
dataStream.Close();
// Get the response.
WebResponse response = request.GetResponse();
// Display the status.
// Console.WriteLine(((HttpWebResponse)response).StatusDescription);
// Get the stream containing content returned by the server.
dataStream = response.GetResponseStream();
// Open the stream using a StreamReader for easy access.
StreamReader reader = new StreamReader(dataStream);
// Read the content.
string responseFromServer = reader.ReadToEnd();
// Display the content.
Console.WriteLine(responseFromServer);
// Clean up the streams.
reader.Close();
dataStream.Close();
response.Close();
}
}
}
You can find more details in this C# .NET communication with API article and this thread.
I have the same problem as Scatmoi but I can't use a web request due to login requirements. I tried to modify the answer above to see if I could get the login authentication to pass but no luck.
-UPDATE-
I just found the solution that will work for me. See the following link for more info but just in case I have pasted the answer here. http://www.codeproject.com/Tips/216175/View-JSON-in-Internet-Explorer
Need to view JSON responses in IE? 1.Open Notepad and paste the following:
Windows Registry Editor Version 5.00;
; Tell IE 7,8,9,10 to open JSON documents in the browser on Windows XP and later.
; 25336920-03F9-11cf-8FD0-00AA00686F13 is the CLSID for the "Browse in place" .
;
[HKEY_CLASSES_ROOT\MIME\Database\Content Type\application/json]
"CLSID"="{25336920-03F9-11cf-8FD0-00AA00686F13}"
"Encoding"=hex:08,00,00,00
2.Save document as IE-Json.reg and then run it.
Note: This has been tested on Windows XP and Windows 7 using IE 7, 8, 9, 10.
Above solution was missing two things, and below code should work in every situation:
Windows Registry Editor Version 5.00
;
; Tell IE to open JSON documents in the browser.
; 25336920-03F9-11cf-8FD0-00AA00686F13 is the CLSID for the "Browse in place" .
;
[HKEY_CLASSES_ROOT\MIME\Database\Content Type\application/json]
"CLSID"="{25336920-03F9-11cf-8FD0-00AA00686F13}"
"Encoding"=hex:08,00,00,00
[HKEY_CLASSES_ROOT\MIME\Database\Content Type\application/x-json]
"CLSID"="{25336920-03F9-11cf-8FD0-00AA00686F13}"
"Encoding"=hex:08,00,00,00
[HKEY_CLASSES_ROOT\MIME\Database\Content Type\text/json]
"CLSID"="{25336920-03F9-11cf-8FD0-00AA00686F13}"
"Encoding"=hex:08,00,00,00
Just save it file json.reg, and run to modify your registry.
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