Accepted Solutions
Hi jay kapalczynski,
For this kind of custom web request call, I normally hack by reading the network traffic.
My best candidate is fiddler.
First step, I only the gptask, execute task page,
Second I open the fiddler. to track that post request call and, I will click [Execute Task (Post)] button from the page.
Third try to find from the fiddler the post request call.
Final step : I try and write same post request call with C#, try and capture the .net web request call network traffic with fiddler as well.
Capturing Traffic from .NET Services with Fiddler
And then I compare this two traffic and tweak the c# code, mostly paramstring part.
Good luck, this is my trick 
I have update your total code after I played with a GPTask with c# a few changes. That should be good now
protected void btnPassParameters_Click(object sender, EventArgs e)
{
string gpUrl = "https://xxxa.gov/arcgis/rest/services/Test/Counties/GPServer/create";
string requestUrl = gpUrl + "/execute";
//make sure requestUrl end with execute **
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri(requestUrl ));
request.KeepAlive = true;
request.Method = "POST";
request.AllowAutoRedirect = true;
request.CookieContainer = new System.Net.CookieContainer();
request.ContentType = "application/x-www-form-urlencoded";// my mistake should be form
StringBuilder paramString = new StringBuilder();
string inputParam = "{\"employees\":[{\"address\":\"1520 Split Oak Ln, Henrico, Virginia, 23229\",\"distance\":\"10\",\"id\":\"9a35172e071f4a33b191172a9b4b02ae\"}]}";
// for this inputParam part, instead of escaping the string how about you save json text into a file and read like that , string inputParam = System.IO.File.ReadAllText("your file path")
paramString.Append($"request="+ inputParam);//no need ?
paramString.Append($"&f=json");
byte[] data = Encoding.ASCII.GetBytes(paramString.ToString());
request.ContentLength = data.Length;
Stream requestStream = request.GetRequestStream();
requestStream.Write(data, 0, data.Length);
requestStream.Close();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
string responseStr = getStringFromWebResponse(response);
Response.Write(responseStr);
}
2nd Loaded Last question....
Where can I read up more on this solution? Is there decent documentation and some hello world examples?
Can I also work with map like the arcgis JavaScript api 4.14? Query, return results write to graphics layer etc?
I am trying to deal with the " " in my string as such...
string inputParam = "{\"employees\":[{\"address\":\"1520 Split Oak Ln, Henrico, Virginia, 23229\",\"distance\":\"10\",\"id\":\"9a35172e071f4a33b191172a9b4b02ae\"}]}";
Should I have to use a ? like this
paramString.Append($"?request="+ inputParam);I can go into the RestEndpoint and input as such and it works great.....BUT for some reason the way I am passing the parameter its not working....
IT works from the restendpoint fine but does not work from C#
This is my total code
protected void btnPassParameters_Click(object sender, EventArgs e)
{
string gpUrl = "https://xxxa.gov/arcgis/rest/services/Test/Counties/GPServer/create";
string requestUrl = gpUrl + "/execute";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri(gpUrl));
request.KeepAlive = true;
request.Method = "POST";
request.AllowAutoRedirect = true;
request.CookieContainer = new System.Net.CookieContainer();
request.ContentType = "application/json";
StringBuilder paramString = new StringBuilder();
string inputParam = "{\"employees\":[{\"address\":\"1520 Split Oak Ln, Henrico, Virginia, 23229\",\"distance\":\"10\",\"id\":\"9a35172e071f4a33b191172a9b4b02ae\"}]}";
paramString.Append($"?request="+ inputParam);
//paramString.Append($"request={requestParamString}");
paramString.Append($"&f=json");
byte[] data = Encoding.ASCII.GetBytes(paramString.ToString());
request.ContentLength = data.Length;
Stream requestStream = request.GetRequestStream();
requestStream.Write(data, 0, data.Length);
requestStream.Close();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
string responseStr = getStringFromWebResponse(response);
Response.Write(responseStr);
}
public string getStringFromWebResponse(WebResponse response)
{
// Get the stream containing content returned by the server.
Stream responseDataStream = response.GetResponseStream();
// Open the stream using a StreamReader for easy access.
StreamReader reader = new StreamReader(responseDataStream);
// Read the content.
string responseFromServer = reader.ReadToEnd();
// Clean up the streams.
reader.Close();
responseDataStream.Close();
response.Close();
return responseFromServer;
}Hi jay kapalczynski,
For this kind of custom web request call, I normally hack by reading the network traffic.
My best candidate is fiddler.
First step, I only the gptask, execute task page,
Second I open the fiddler. to track that post request call and, I will click [Execute Task (Post)] button from the page.
Third try to find from the fiddler the post request call.
Final step : I try and write same post request call with C#, try and capture the .net web request call network traffic with fiddler as well.
Capturing Traffic from .NET Services with Fiddler
And then I compare this two traffic and tweak the c# code, mostly paramstring part.
Good luck, this is my trick
I have update your total code after I played with a GPTask with c# a few changes. That should be good now
protected void btnPassParameters_Click(object sender, EventArgs e)
{
string gpUrl = "https://xxxa.gov/arcgis/rest/services/Test/Counties/GPServer/create";
string requestUrl = gpUrl + "/execute";
//make sure requestUrl end with execute **
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri(requestUrl ));
request.KeepAlive = true;
request.Method = "POST";
request.AllowAutoRedirect = true;
request.CookieContainer = new System.Net.CookieContainer();
request.ContentType = "application/x-www-form-urlencoded";// my mistake should be form
StringBuilder paramString = new StringBuilder();
string inputParam = "{\"employees\":[{\"address\":\"1520 Split Oak Ln, Henrico, Virginia, 23229\",\"distance\":\"10\",\"id\":\"9a35172e071f4a33b191172a9b4b02ae\"}]}";
// for this inputParam part, instead of escaping the string how about you save json text into a file and read like that , string inputParam = System.IO.File.ReadAllText("your file path")
paramString.Append($"request="+ inputParam);//no need ?
paramString.Append($"&f=json");
byte[] data = Encoding.ASCII.GetBytes(paramString.ToString());
request.ContentLength = data.Length;
Stream requestStream = request.GetRequestStream();
requestStream.Write(data, 0, data.Length);
requestStream.Close();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
string responseStr = getStringFromWebResponse(response);
Response.Write(responseStr);
}