To add resource from Project server to your project you need to know ID of the resource (Not GUID). This information is stored in the RES_ID column. Just quest resource from server and get the ID.
If you plan to add several resources - I would recommend to cache a list of resources locally. I'm using this query to organize several dictionaries inside of my add-on:
ResourceDataSet resourceDs = new ResourceDataSet();
PSLibrary.Filter resourceFilter = new Microsoft.Office.Project.Server.Library.Filter();
resourceFilter.FilterTableName = resourceDs.Resources.TableName;
resourceFilter.Fields.Add(new PSLibrary.Filter.Field(resourceDs.Resources.TableName, resourceDs.Resources.RES_IDColumn.ColumnName, PSLibrary.Filter.SortOrderTypeEnum.None));
resourceFilter.Fields.Add(new PSLibrary.Filter.Field(resourceDs.Resources.TableName, resourceDs.Resources.RES_UIDColumn.ColumnName, PSLibrary.Filter.SortOrderTypeEnum.None));
resourceFilter.Fields.Add(new PSLibrary.Filter.Field(resourceDs.Resources.TableName, resourceDs.Resources.RES_NAMEColumn.ColumnName, PSLibrary.Filter.SortOrderTypeEnum.None));
resourceFilter.Fields.Add(new PSLibrary.Filter.Field(resourceDs.Resources.TableName, resourceDs.Resources.RES_TYPEColumn.ColumnName, PSLibrary.Filter.SortOrderTypeEnum.None));
resourceFilter.Fields.Add(new PSLibrary.Filter.Field(resourceDs.Resources.TableName, resourceDs.Resources.RES_INITIALSColumn.ColumnName, PSLibrary.Filter.SortOrderTypeEnum.None));
resourceFilter.Fields.Add(new PSLibrary.Filter.Field(resourceDs.Resources.TableName, resourceDs.Resources.RES_EXTERNAL_IDColumn.ColumnName, PSLibrary.Filter.SortOrderTypeEnum.None));
resourceFilter.Fields.Add(new PSLibrary.Filter.Field(resourceDs.Resources.TableName, resourceDs.Resources.RES_IS_WINDOWS_USERColumn.ColumnName, PSLibrary.Filter.SortOrderTypeEnum.None));
resourceFilter.Fields.Add(new PSLibrary.Filter.Field(resourceDs.Resources.TableName, resourceDs.Resources.WRES_ACCOUNTColumn.ColumnName, PSLibrary.Filter.SortOrderTypeEnum.None));
resourceFilter.Fields.Add(new PSLibrary.Filter.Field(resourceDs.Resources.TableName, resourceDs.Resources.WRES_EMAILColumn.ColumnName, PSLibrary.Filter.SortOrderTypeEnum.None));
resourceFilter.Fields.Add(new PSLibrary.Filter.Field(resourceDs.Resources.TableName, resourceDs.Resources.RES_TIMESHEET_MGR_UIDColumn.ColumnName, PSLibrary.Filter.SortOrderTypeEnum.None));
resourceDs = ReadResources(resourceFilter.GetXml(), false);
The query is defined as extension of ResourceClient class from PSI.
As soon as you know ID of the resource just execute: Application.EnterpriseResourceGet(resId, omissing);
Application is from Microsoft.Office.Interop.MSProject
.
This command will load the resource from Project Server into Active Project. Oh yes, please don't forget to check that your project is active when you call the command.