Add site column to content type using CSOM

Add site column to content type using CSOM programmatically in SharePoint

Add site column to content type using CSOM. In this post, I describe you to add the site column to the content type using csom. If you want to create content type programmatically using csom, I discussed in my previous post. Create Content Type using CSOM. Also, I will describe you to create site column using csom in my next post. Below is complete code.[AdSense-A]

public static void AddColumnINContenType(string ColumnName, string siteurls, string contentTypeName)
        {

            try
            {
                
                ClientContext clientContext = new ClientContext(siteurls);
                Web rootWeb = clientContext.Site.RootWeb;
                Field session = rootWeb.Fields.GetByInternalNameOrTitle(ColumnName);

                var contentType = GetContentTypeByName(clientContext, rootWeb, contentTypeName);
                if (contentType == null) return; // content type was not found
                clientContext.Load(contentType.FieldLinks, c => c.IncludeWithDefaultProperties(pr => pr.Id));
                clientContext.Load(contentType.Fields, c => c.IncludeWithDefaultProperties(pr => pr.Id));
                clientContext.ExecuteQuery();
                // ContentType sessionContentType = rootWeb.ContentTypes.GetById("0x0100BDD5E43587AF469CA722FD068065DF5D");
                clientContext.Load(session);
                clientContext.ExecuteQuery();


                var hasFieldConnectedTitle = contentType.FieldLinks.Any(f => f.Name == "Title");
                if (hasFieldConnectedTitle)
                {
                    var fieldLinks = contentType.FieldLinks;
                    //Field hasFieldConnected11 = contentType.Fields.GetByTitle("Title");
                    Field hasFieldConnected11 = rootWeb.Fields.GetByInternalNameOrTitle("Title");
                    clientContext.Load(hasFieldConnected11);
                    clientContext.ExecuteQuery();
                    var fieldLinkToRemove = fieldLinks.GetById(hasFieldConnected11.Id);
                    fieldLinkToRemove.DeleteObject();
                    contentType.Update(true); //push changes
                    clientContext.ExecuteQuery();
                }

                // Determine whether the content type refers to the field.
                var hasFieldConnected = contentType.FieldLinks.Any(f => f.Name == ColumnName);

                if (hasFieldConnected) return;
                contentType.FieldLinks.Add(new FieldLinkCreationInformation
                {
                    Field = session
                });

                contentType.Update(true);
                clientContext.ExecuteQuery();

            }
            catch (Exception ex)
            {
               
            }
        }

 

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