SharePoint: Deleting a site with subsites programmatically

This is a classic SharePoint stumble: You want to delete a site (SPWeb), so you think “I’ll just use the Delete method. Obviously!” as anyone would. A few moments later and you’re staring at this obstinate and unshiftable error message:

Microsoft.SharePoint.SPException : Error deleting Web site “/web”. You can’t delete a site that has subsites.

Eventually you resign yourself to having to write some form of recursive function to delete every subsite’s subsite’s subsites one by one.


So let me make your life a little easier. Stick this static class in your reusable library of helpful classes (everyone’s got one), and forget about the problem forever:

public static class SPWebFix
    /// <summary>
    /// Deletes the Web site, optionally forcing the deletion of subsites
    /// </summary>
    /// <param name="web">The site to delete</param>
    /// <param name="force">Forcing deletion causes the site to be deleted even if it has subsites</param>
    /// <returns>The total number of sites deleted</returns>
    public static int Delete(this SPWeb web, bool force)
        if (force || web.Webs.Count == 0)
            // Call the recursive function
            return deleteWeb(web);
            // Return 0 to indicate that this site was not deleted.
            return 0;

    private static int deleteWeb(SPWeb web)
        int sitesDeleted = 1;

        foreach (SPWeb subWeb in web.Webs)
            sitesDeleted += deleteWeb(subWeb);


        return sitesDeleted;

Now whenever you want to recklessly delete a site and all its subsites, simply call the extension method version with the ‘force’ flag set to true:


That’s one tiny problem fixed.Smile

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