Programmatically create a folder in a document library and in a list

Programmatically create a folder in a document library

I was able to successfully create a folder in a document library using this code:

SPList list = web.Lists.TryGetList("ListTitle");

SPFolderCollection folderColl = list.RootFolder.SubFolders;

SPFolder newFolder = folderColl.Add(FolderUrl);

FolderUrl means one of the following:

• "/Document Library/Folder1"
  Creates a folder named “Folder1” under “Document Library”…
• "/Document Library/Folder1/Folder11"
  Creates a folder named “Folder11” under “Folder1” in “Document Library”…
• "/Subsite/Document Library/Folder1"
  Creates a folder named “Folder1” under “Document Library” in a sub site…
• "/Subsite/Document Library/Folder1/Folder11" 
  Creates a folder named “Folder11” under “Folder1” in “Document Library” in a sub site… 

Here is the desired result:

Programmatically create a folder in a list

So after we can create a folder in a SharePoint document library we now can create them in SharePoint lists.

I was able to successfully create a folder in a SharePoint list using this code :

SPList list = web.Lists.TryGetList("ListTitle");

SPListItem newFolderItem = list.Items.Add(completeFolderUrl, SPFileSystemObjectType.Folder);

newFolderItem["Title"] = "TitleOfTheFolder";

newFolderItem.Update();

completeFolderUrl means one of the following:

• "/lists/Custom List"
  The folder is created under “Custom List”…
• "/lists/Custom List/Folder1"
  The folder is created under “Folder1” in “Custom List”…
• "/aboutus/lists/Custom List"
  The folder is created under “Custom List” in a sub site…
• "/aboutus/lists/Custom List/Folder1"
  The folder is created under “Folder1” in “Custom List” in a sub site…

Important: The folder didn’t create for me when my “completeFolderUrl” ended with a slash ‘/’.

This is the desired result :