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How to use the HttpWebRequest class and the HttpWebResponse class to create appointment items on a computer that is running Exchange 2000 Server by using Visual C#

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This article was previously published under Q313120

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This article describes how to use the HttpWebRequest class and the HttpWebResponse class in the "System.Net" namespace to create an appointment item on a computer that is running Microsoft Exchange 2000 Server by using Microsoft Visual C# .

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More information

To create an appointment item on a computer that is running Exchange 2000 in Visual C# , follow these steps:
  1. Start Microsoft Visual Studio .NET or Microsoft Visual Studio 2005.
  2. On the File menu, point to New, and then click Project.
  3. In the Visual C# Projects types list, click Console Application.

    Note In Visual Studio 2005, click Console Application in the Visual C# list.

    In Visual Studio .NET, Class1.cs is created by default. In Visual Studio 2005, Program.cs is created by default.
  4. In the code window, replace the code with the following:
    using System;
    using System.Net;
    using System.IO;            
    namespace WebDavNET
        /// <summary>
        /// Summary description for Class1.
        /// </summary>
        class Class1
        static void Main(string[] args)
                // TODO: Replace with the URL of an object on Exchange Server
                string sUri = "http://ExchServer/Exchange/Administrator/Calendar/testappt.eml";       
                System.Uri myUri = new System.Uri(sUri);
                HttpWebRequest HttpWRequest = (HttpWebRequest)WebRequest.Create(myUri);
                string strXMLNSInfo = "xmlns:g=\"DAV:\" " +
                " xmlns:e=\"\"" +
                " xmlns:mapi=\"\"" +
                " xmlns:x=\"xml:\" xmlns:cal=\"urn:schemas:calendar:\"" +
                " xmlns:dt=\"urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/\"" +
                " xmlns:mail=\"urn:schemas:httpmail:\">";
                string sQuery = "<?xml version=\"1.0\"?>" +
                "<g:propertyupdate " + strXMLNSInfo +
                "<g:set>" +
                "<g:prop>" +
                "<g:contentclass>urn:content-classes:appointment</g:contentclass>" +
                "<e:outlookmessageclass>IPM.Appointment</e:outlookmessageclass>" +
                "<mail:subject>Appointment Subject</mail:subject>" +
                "<cal:location>Appointment Location</cal:location>" +
                "<cal:dtstart dt:dt=\"\">2001-12-27T22:00:00.000Z</cal:dtstart>" +
                "<cal:dtend dt:dt=\"\">2001-12-27T22:30:00.000Z</cal:dtend>" +
                "<cal:instancetype dt:dt=\"int\">0</cal:instancetype>" +
                "<cal:busystatus>BUSY</cal:busystatus>" +
                "<cal:meetingstatus>TENTATIVE</cal:meetingstatus>" +
                "<cal:alldayevent dt:dt=\"boolean\">0</cal:alldayevent>" +
                "</g:prop>" +
                "</g:set>" +
                // Set credentials.
                // TODO: Replace with appropriate user credential
                NetworkCredential myCred = new NetworkCredential(@"DomainName\UserName", "UserPassword");
                CredentialCache myCredentialCache = new CredentialCache();
                myCredentialCache.Add(myUri, "Basic", myCred);
                HttpWRequest.Credentials = myCredentialCache;
                // Set headers.
                HttpWRequest.KeepAlive = false;
                HttpWRequest.Headers.Set("Pragma", "no-cache");
                HttpWRequest.Headers.Set("Translate", "f");
                HttpWRequest.ContentType =  "text/xml";
                HttpWRequest.ContentLength = sQuery.Length;
                //Set the request timeout to 5 minutes.
                HttpWRequest.Timeout = 300000;
                // set the request method
                HttpWRequest.Method = "PROPPATCH";
                // Store the data in a byte array.
                byte[] ByteQuery = System.Text.Encoding.ASCII.GetBytes(sQuery);
                HttpWRequest.ContentLength = ByteQuery.Length;
                Stream QueryStream = HttpWRequest.GetRequestStream();
                // Write the data to be posted to the request stream.
                // Send the request and get the response.
                HttpWebResponse HttpWResponse = (HttpWebResponse)HttpWRequest.GetResponse();
                // Get the Status code.
                int iStatCode =  (int)HttpWResponse.StatusCode;
                string sStatus = iStatCode.ToString();
                Console.WriteLine("Status Code: {0}", sStatus);
                // Get the request headers
                string sReqHeaders = HttpWRequest.Headers.ToString();
                // Read the response stream.
                Stream strm = HttpWResponse.GetResponseStream();
                StreamReader sr = new StreamReader(strm);
                string sText = sr.ReadToEnd();
                Console.WriteLine("Response: {0}", sText);
                // Close the stream.
                // Clean up
                myCred = null;
                myCredentialCache = null;
                HttpWRequest = null;
                HttpWResponse = null;
                QueryStream = null;
                strm = null;
                sr = null;
            catch (Exception e)
                Console.WriteLine("{0} Exception caught.", e);
  5. Search for TODO in the code, and then modify the code for your environment.
  6. Press F5 to build and to run the program.
  7. Make sure that the appointment item was created.

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Keywords: KB313120, kbhowto, kbcode, kbxml, kbmsg, kbhowtomaster

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Article Info
Article ID : 313120
Revision : 7
Created on : 12/11/2006
Published on : 12/11/2006
Exists online : False
Views : 362