Creating Project Server Enterprise Resources Via REST Using c#

1. private string GetFormDigestValue()
2. {
3.     string digest = null;
4.  
5.     HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(this.baseUrl + "/_api/contextinfo");
6.     request.Method = "POST";
7.     request.ContentType = "application/json;odata=verbose";
8.     request.UseDefaultCredentials = true;
9.     var postBody = string.Empty;
10.     request.ContentLength = postBody.Length;
11.  
12.     byte[] postData = Encoding.ASCII.GetBytes(postBody);
13.  
14.     using (Stream requestStream = request.GetRequestStream())
15.     {
16.         requestStream.Write(postData, 0, postData.Length);
17.         requestStream.Close();
18.  
19.         HttpWebResponse response = (HttpWebResponse)request.GetResponse();
20.         using (Stream responseStream = response.GetResponseStream())
21.         {
22.             var encoding = ASCIIEncoding.ASCII;
23.             using (var reader = new StreamReader(response.GetResponseStream(), encoding))
24.             {
25.                 // parse the ContextInfo response
26.                 var resultXml = XDocument.Parse(reader.ReadToEnd());
27.  
28.                 // get the form digest value
29.                 var d = from e in resultXml.Descendants()
30.                         where e.Name == XName.Get("FormDigestValue", "http://schemas.microsoft.com/ado/2007/08/dataservices")
31.                         select e;
32.                 digest = d.First().Value;
33.             }
34.         }
35.     }
36.  
37.     return digest;
38. }

The POST requests will be prepared by the PreparePostRequest method before execution:

1. private HttpWebRequest PreparePostRequest(string requestPath, string formDigestValue, string postBody)
2. {
3.     HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(this.baseUrl + requestPath);
4.     request.Method = "POST";
5.     request.ContentType = "application/json;odata=verbose";
6.     request.Accept = "application/json;odata=verbose";
7.     request.Headers.Add("X-RequestDigest", formDigestValue);
8.     request.UseDefaultCredentials = true;
9.     request.ContentLength = postBody.Length;
10.  
11.     byte[] postData = Encoding.ASCII.GetBytes(postBody);
12.  
13.     System.IO.Stream requestStream = request.GetRequestStream();
14.     requestStream.Write(postData, 0, postData.Length);
15.     requestStream.Close();
16.  
17.     return request;
18. }

The ExecuteAuthorizedPostRequest gets the form digest and prepares the request using the other two methods, finally sends the request and reads the response returned by the server.

1. private HttpWebResponse ExecuteAuthorizedPostRequest(string requestPath, string postBody)
2. {
3.     string formDigestValue = GetFormDigestValue();
4.     HttpWebRequest request = PreparePostRequest(requestPath, formDigestValue, postBody);
5.  
6.     HttpWebResponse response = (HttpWebResponse)request.GetResponse();
7.  
8.     return response;
9. }

1. public void CreateEnterpriseResource()
2. {
3.     string requestPath = "/_api/ProjectServer/EnterpriseResources";
4.     // creating a new resource setting only its name
5.     //string postBody = "{ '__metadata': { 'type': 'PS.EnterpriseResource' }, 'Name':'New Resource' }";
6.     // creating a new resource setting its name and type ('Material' in this case)
7.     //string postBody = string.Format("{{ '__metadata': {{ 'type': 'PS.EnterpriseResource' }}, 'Name':'New Material Resource', 'ResourceType': '{0}' }}", (int)EnterpriseResourceType.Material);
8.     // creating a new resource setting its name and cost center
9.     string postBody = string.Format("{{ '__metadata': {{ 'type': 'PS.EnterpriseResource' }}, 'Name':'New CC Resource', 'CostCenter': '{0}' }}", "Your Cost Center");
10.     
11.     var resp = ExecuteAuthorizedPostRequest(requestPath, postBody);
12. }