Displaying List Item Content [Blog Posts] Programatically Us

Posted by Community Admin on 12-Sep-2011 00:00

Hi All,

After a mammoth session learning (and subsequently patching) SiteFinity 4.2, the last hurdle I need to overcome is the ability to get the content of a List Item and assign it to an ASP (C#) variable.

Essentially I'd like to be able to loop over all given List Items (in this case, blog posts) and assign the content of the ListItem (Blog Post) to a C# variable which I can then manipulate.

Does anyone have any experience doing this? I've followed an old (SF3.x, Visual Basic) how-to and managed (I think!) to translate it to SF4.2 and C#. The code appears below.

Unfortunately, I cannot get the code to load anything into the list. Visiting the page in a browser gives the following error (ASP gives Line 6, below, as the point of occurance):

I have a feeling I might need to use a Linq Query to extract the posts I want, however I'm not so sure how to go about it. Can anyone give me a pointer or helping hand please?

Exception Details: Telerik.Sitefinity.SitefinityExceptions.ItemNotFoundException: You are trying to access item that no longer exists. The most probable reason is that it has been deleted by another user.

Stack Trace:


            [ItemNotFoundException: You are trying to access item that no longer exists. The most probable reason is that it has been deleted by another user.]
   DynamicModule.ns.Wrapped_OpenAccessListsDataProvider_e1f3a1b538c2464d870ac9deb2d5665e.GetList(Guid id) +253
   Telerik.Sitefinity.Modules.Lists.ListsManager.GetList(Guid id) +45
   SitefinityWebApp.Controls.TestBlog.Page_Load(Object sender, EventArgs e) in C:\inetpub\wwwroot\pp\Controls\TestBlog.aspx.cs:23
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +91
   System.Web.UI.Control.LoadRecursive() +74
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207

01.protected void Page_Load(object sender, EventArgs e)

02.

03. /* Setup array to hold posts */

04. string[] strContent = null;

05.

06. /* Define new list manager for access to lists */

07. Telerik.Sitefinity.Modules.Lists.ListsManager mgrList = new Telerik.Sitefinity.Modules.Lists.ListsManager();

08.

09. /* Define GUID of list to load */

10. Guid searchForGuid = new Guid("854FD531-2B15-4277-B616-49A36D7FBB85");

11.

12. /* Load list into new SiteFinity list */

13. Telerik.Sitefinity.Lists.Model.List objLists = mgrList.GetList(searchForGuid);

14.

15. /* Define a list item for use later */

16. Telerik.Sitefinity.Lists.Model.ListItem thisItem = new Telerik.Sitefinity.Lists.Model.ListItem();

17.

18. /* Load list into more system friendly model */

19. System.Collections.IList sysList = objLists.ListItems.ToList();

20.

21. /* Loop over system friendly list and write content to array */

22. foreach ( int r in sysList)

23.

24. int c = 0;

25. /* Assign content to array */

26. strContent[c]=thisItem.Content;

27.

28. /* Output something to the screen */

29. Response.Write("Loop: " + c.ToString() + "<br />");

30. Response.Write(strContent[c]);

31. c++;

32.

33.

Posted by Community Admin on 15-Sep-2011 00:00

Hello Jeff,

Here is the API code that will get the contents of the list item.

String myListName = "List";

ListsManager manager = ListsManager.GetManager();

Telerik.Sitefinity.Lists.Model.ListItem currentItem = manager.GetListItems()

.Where(i => i.Parent.Title == myListName)

.FirstOrDefault();

if (currentItem != null)

var content = currentItem.GetValue("Content");

//Content is the name of the field in list that represents the editor where you enter contents

You can review all field names by going to Lists module entering a list and in the right sidebar clicking custom fields for lists. There is a tab with all the default field names.

Greetings,
Stanislav Velikov
the Telerik team

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