SharePoint 2010 Get Content Type Programmatically

Question

I've created several content type that inherit from the document content type in the site content type lists. Please refer to the image below

How do I get these these content type pro-grammatically. Basically what I wants to do is to show these content type in a drop down lists so that the user can select which document library to upload a file to. I'm stuck at there

 using (SPSite site = new SPSite(SPContext.Current.Site.Url))
        {
            using (SPWeb web = site.OpenWeb())
            {
                SPContentType documentContentType = web.AvailableContentTypes[SPBuiltInContentTypeId.Document];
            }
        }

Please provide some guidance. Thanks

Answer 1

I thik that you should create a base content type which is inherited from Document content type. Then you should inherit Arvhitecture Document, Manual Document, etc. content types from your base content type.

After this you can select your content types by base content type like this:

SPContentTypeId id = new SPContentTypeId(BaseContentTypeId);
IList<SPContentType> ContentTypes = web.ContentTypes.Cast<SPContentType>().Where(c => c.Id.IsChildOf(id)).ToList();

Answer 2

You could accomplish this using the SPContentType.Parent property.

Your sample code might look like this. I have not executed this code and checked, so modify wherever required.

using (SPSite site = new SPSite(SPContext.Current.Site.Url))
{
  using (SPWeb web = site.OpenWeb())
   {
     SPContentTypeCollection allContentTypes = web.ContentTypes;
                SPContentTypeCollection docContentTypes = null;
                foreach (SPContentType objContentType in allContentTypes)
                {
                    if (objContentType.Parent.Name == "Document")
                    {
                        docContentTypes.Add(objContentType);
                    }
                }
                // docContentTypes contains all content types derived from content type "Document". You can implement additional checks and add this into a drop down list.
    }
}

Answer 3

Unfortunately the above code won't work - this is because you can't reference the SPContentTypeCollection if null (and can't initialize it using 'new...' either). Use a list to do it:

using System.Collections.Generic;
using Microsoft.SharePoint;
...
using (SPSite GetSite = new SPSite("http://site"))
{
    using (SPWeb TopWeb = GetSite.OpenWeb())
    {
            SPContentTypeCollection CurContentTypes = TopWeb.ContentTypes;
            List<SPContentType> SelectedTypes = new List<SPContentType>();
            foreach (SPContentType SPCT in CurContentTypes)
            {
                if (SPCT.Group == "MyGroup")
                {
                    SelectedTypes.Add(SPCT);
                }
            }
    }
}

Once this is done, you can simply iterate through the list