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@vgrem

vgrem/EnsureFolder.cs

Last active Aug 29, 2015
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Ensures the nested folder exists using SharePoint SSOM
using System;
using System.Linq;
using Microsoft.SharePoint;
namespace SharePoint
{
internal static class SPFolderExtensions
{
/// <summary>
/// Ensure SPFolder
/// </summary>
/// <param name="web"></param>
/// <param name="listTitle"></param>
/// <param name="folderUrl"></param>
/// <returns></returns>
public static SPFolder EnsureFolder(this SPWeb web, string listTitle, string folderUrl)
{
if (string.IsNullOrEmpty(folderUrl))
throw new ArgumentNullException("folderUrl");
var list = web.Lists.TryGetList(listTitle);
return CreateFolderInternal(list, list.RootFolder, folderUrl);
}
private static SPFolder CreateFolderInternal(SPList list, SPFolder parentFolder, string folderUrl)
{
var folderNames = folderUrl.Split(new char[] {'/'}, StringSplitOptions.RemoveEmptyEntries);
var folderName = folderNames[0];
var curFolder =
parentFolder.SubFolders.Cast<SPFolder>().FirstOrDefault( f => System.String.Compare(f.Name, folderName, System.StringComparison.OrdinalIgnoreCase) == 0);
if (curFolder == null)
{
var folderItem = list.Items.Add(parentFolder.ServerRelativeUrl, SPFileSystemObjectType.Folder,
folderName);
folderItem.SystemUpdate();
curFolder = folderItem.Folder;
}
if (folderNames.Length > 1)
{
var subFolderUrl = string.Join("/", folderNames, 1, folderNames.Length - 1);
return CreateFolderInternal(list, curFolder, subFolderUrl);
}
return curFolder;
}
}
}
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