How to export Survey123 data using C#

Question

I have found that there exist some python script to export Survey123 data to your computer. Is there any similar code using the C# language with the ArcGIS Runtime SDK version 100.2.1? I am trying to follow this link: Access the ArcGIS platform—ArcGIS Runtime SDK for .NET (WPF) | ArcGIS for Developers But my application crash at the first line ( ArcGISPortal portal = await ArcGISPortal.CreateAsync(); ) Error code is the following: "Une erreur s'est produite lors de l'envoi de la demande." System.Exception {System.Net.Http.HttpRequestException} Any idea why? EDIT: I found additionnal information about the error: Proxy Authentication Required ( The ISA Server requires authorization to fulfill the request. Access to the Web Proxy filter is denied. ) EDIT: All problems solved. Here is the complete c# code to extract and delete the data (make sure you install and reference the arcgis Runtime .Net sdk and newtonSoft.JSON): using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using Esri.ArcGISRuntime; using Esri.ArcGISRuntime.Security; using Esri.ArcGISRuntime.Portal; using Esri.ArcGISRuntime.Data; using System.Net.Http; using System.Threading; using System.IO; using System.Net; using System.Collections.Specialized; using Newtonsoft.Json; namespace xFormAGO { public partial class Form1 : Form { string nomUtilisateur = "yourusername"; string motPass = "yourPassword"; //Your service URL will be different but similar string ServiceUrl = @"https://services1.arcgis.com/xas33e1csd2dYTMBwrt4/ArcGIS/rest/services/service_832yf5aaa3a341fgucc03f946c89643/FeatureServer/0/"; //Layer 0 string dossier = @"C: est"; string fichier = "data.txt"; public Form1() { InitializeComponent(); WebRequest.DefaultWebProxy.Credentials = CredentialCache.DefaultNetworkCredentials; } //This button extract the data private async void cmdExtraction_Click(object sender, EventArgs e) { try { //Create ArcGIS Token var cred = await Esri.ArcGISRuntime.Security.AuthenticationManager.Current.GenerateCredentialAsync( new Uri("https://www.arcgis.com/sharing/rest"), nomUtilisateur, motPass) as ArcGISTokenCredential; //Build POST request string reponseStr; using (var wb = new WebClient()) { //Request parameter. This one just download all data and Fields var requete = new NameValueCollection(); requete["where"] = "1=1"; requete["f"] = "json"; requete["outFields"] = "*"; requete["token"] = cred.Token; //Important! Must be present //Send request and wait for answer var response = wb.UploadValues(ServiceUrl + "query", "POST", requete); reponseStr = Encoding.UTF8.GetString(response); //Translate the answer to a JSON STRING } File.WriteAllText(dossier + fichier, reponseStr); //Export the JSON string into a text file Rootobject dataResults = JsonConvert.DeserializeObject<Rootobject>(reponseStr); //Build the object containing the data. This line will crash for you here. Use google to understand how to convert a JSON string to a C# object. Or see the notes at the end of this code. //Use this object to manipulate your data as you wish } catch (Exception exp) { throw new Exception(exp.Message); } } //This button delete the data private async void cmdSupprimer_Click(object sender, EventArgs e) { //Create ArcGIS Token var cred = await Esri.ArcGISRuntime.Security.AuthenticationManager.Current.GenerateCredentialAsync( new Uri("https://www.arcgis.com/sharing/rest"), nomUtilisateur, motPass) as ArcGISTokenCredential; //POST request to delete data using (var wb = new WebClient()) { //This request deletes everything in the layer 0 var data = new NameValueCollection(); data["where"] = "1=1"; data["f"] = "json"; data["token"] = cred.Token; var response2 = wb.UploadValues(ServiceUrl + "deleteFeatures", "POST", data); string responseInString = Encoding.UTF8.GetString(response2); //Check the value of responseInString to see if deletion was successful } } } // //Here you will past the content of "data.txt" that you received earlier!!! //Very important // //Using visual studio, you will do a special paste as follow: //-Open the data.txt file //-Copy all content //-Return back to visual studio and do a special "Paste as JSON format (Edition / special paste / paste JSON code as class) //You will then be able to use a similar line of code: Rootobject dataResults = JsonConvert.DeserializeObject(reponseStr);‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

NicolasRoger · Accepted Answer

Ok I found what was causing the error. Here is how to solve it: Add this line at the beginning fo your code: WebRequest.DefaultWebProxy.Credentials = CredentialCache.DefaultNetworkCredentials;‍ That's it! I am now able to connect to ArcGIS portals. I should be able to figure out the rest.