I am learning how to consume K2 REST service via Visual Studio by sample code provided by Developer Document. The code will list below.
The issue is that when I established WebHttpRequest and tried to get response from server, the program throw an execption with "401 unauthorized".
I am wondering how to set Request's credentials for connecting K2 REST service.
PS: when type REST service's URL in IE, it is normal to get XML contents.
Sample Code:
Default.aspx:<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="TestASP_Web_Application_for_REST._Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title></title></head><body> <form id="form1" runat="server"> <div> <asp:Button ID="getDataButton" runat="server" onclick="getDataButton_Click" Text="Get Worklist Data" /> <br /> <table style="width: 100%;"> <tr> <td> Process Name: </td> <td> <asp:TextBox ID="processName" runat="server"></asp:TextBox> </td> </tr> <tr> <td> Serial Number: </td> <td> <asp:TextBox ID="serialNumber" runat="server"></asp:TextBox> </td> </tr> <tr> <td> Alloocated User: </td> <td> <asp:TextBox ID="allocatedUser" runat="server"></asp:TextBox> </td> </tr> <tr> <td> Process DataField Value: </td> <td> <asp:TextBox ID="procDataField" runat="server"></asp:TextBox> </td> </tr> <tr> <td> Activity DataField Value: </td> <td> <asp:TextBox ID="actDataField" runat="server"></asp:TextBox> </td> </tr> <tr> <td> Available Actions: </td> <td> <asp:DropDownList ID="actionsDropDownList" runat="server" Width="129px"> </asp:DropDownList> </td> </tr> </table> </div> </form></body></html> //Default.aspx.cs:using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Net;using System.Xml.Linq;using System.Xml;using System.IO; namespace TestASP_Web_Application_for_REST{ public partial class _Default : System.Web.UI.Page { // Change the RestURL to match your workspace environment private const string RestUrl = "http://sav-docs:81/K2Services/REST.svc/Worklist/Items?piDataField=true&actXmlField=true"; private static readonly XNamespace WorklistNamespace = "http://schemas.k2.com/worklist/d1"; private static readonly XNamespace ActivityNamespace = "http://schemas.k2.com/activity/d1"; private static readonly XNamespace ProcessNamespace = "http://schemas.k2.com/process/d1"; private static readonly XNamespace EventNamespace = "http://schemas.k2.com/event/d1"; protected void Page_Load(object sender, EventArgs e) { } protected void getDataButton_Click(object sender, EventArgs e) { GetData(); } private void GetData() { // create the web request HttpWebRequest request = WebRequest.Create(RestUrl) as HttpWebRequest; // Assign Credentials request.Credentials = CredentialCache.DefaultCredentials; // get response XDocument responseDocument; using (HttpWebResponse response = request.GetResponse() as HttpWebResponse) using (Stream responseStream = response.GetResponseStream()) using (XmlReader responseReader = XmlReader.Create(responseStream)) { responseDocument = XDocument.Load(responseReader); } //Call method to extract a specific value PopulateAllocatedUserTextBox(responseDocument); PopulateActivityDataTextBox(responseDocument); PopulateProcessDataTextBox(responseDocument); PopulateWorklistItemSerialNumberTextBox(responseDocument); PopulateProcessNameTextBox(responseDocument); PopulateActions(responseDocument); } private void PopulateActions(XDocument responseDocument) { var actionsQuery = from worklistItemCollection in responseDocument.Elements(WorklistNamespace + "WorklistItemCollection") from worklistItem in worklistItemCollection.Elements(WorklistNamespace + "WorklistItem") from action in worklistItem.Elements(WorklistNamespace + "Action") select new { SerialNumber = (string)worklistItem.Attribute("SerialNumber"), Name = (string)action.Attribute("Name"), Batchable = (bool)action.Attribute("Batchable") }; foreach (var action in actionsQuery) { var listItem = new ListItem() { Text = action.Name, Value = action.SerialNumber, Enabled = action.Batchable, }; string thisSerialNumber = listItem.Value.ToString(); if (thisSerialNumber == serialNumber.Text) { actionsDropDownList.Items.Add(listItem); } } } private void PopulateProcessDataTextBox(XDocument responseDocument) { var dataFieldValueQuery = from worklistItemCollection in responseDocument.Elements(WorklistNamespace + "WorklistItemCollection") from worklistItem in worklistItemCollection.Elements(WorklistNamespace + "WorklistItem") from processInstance in worklistItem.Elements(ProcessNamespace + "ProcessInstance") from dataField in processInstance.Elements(ProcessNamespace + "DataField") where (string)dataField.Attribute("Name") == "MyProcessDataField" select (string)dataField; var firstResult = dataFieldValueQuery.FirstOrDefault(); procDataField.Text = firstResult; } private void PopulateActivityDataTextBox(XDocument responseDocument) { var dataFieldValueQuery = from worklistItemCollection in responseDocument.Elements(WorklistNamespace + "WorklistItemCollection") from worklistItem in worklistItemCollection.Elements(WorklistNamespace + "WorklistItem") from activityInstanceDestination in worklistItem.Elements(ActivityNamespace + "ActivityInstanceDestination") from dataField in activityInstanceDestination.Elements(ProcessNamespace + "DataField") where (string)dataField.Attribute("Name") == "MyActivityDataField" select (string)dataField; var firstResult = dataFieldValueQuery.FirstOrDefault(); actDataField.Text = firstResult; } private void PopulateAllocatedUserTextBox(XDocument responseDocument) { var allocatedUserFieldValueQuery = from worklistItemCollection in responseDocument.Elements(WorklistNamespace + "WorklistItemCollection") from worklistItem in worklistItemCollection.Elements(WorklistNamespace + "WorklistItem") select (string)worklistItem.Attribute("AllocatedUser").Value; var firstResult = allocatedUserFieldValueQuery.FirstOrDefault(); allocatedUser.Text = firstResult; } private void PopulateProcessNameTextBox(XDocument responseDocument) { var processFullNameFieldValueQuery = from worklistItemCollection in responseDocument.Elements(WorklistNamespace + "WorklistItemCollection") from worklistItem in worklistItemCollection.Elements(WorklistNamespace + "WorklistItem") from processInstance in worklistItem.Elements(ProcessNamespace + "ProcessInstance") select (string)processInstance.Attribute("FullName").Value; var firstResult = processFullNameFieldValueQuery.FirstOrDefault(); processName.Text = firstResult; } private void PopulateWorklistItemSerialNumberTextBox(XDocument responseDocument) { var processFullNameFieldValueQuery = from worklistItemCollection in responseDocument.Elements(WorklistNamespace + "WorklistItemCollection") from worklistItem in worklistItemCollection.Elements(WorklistNamespace + "WorklistItem") select (string)worklistItem.Attribute("SerialNumber").Value; var firstResult = processFullNameFieldValueQuery.FirstOrDefault(); serialNumber.Text = firstResult; } }}
