SharePoint 2007 – Get SPList Object by Url

I want to get a reference to a SPList object associated with a given list url.  This method works with any of the url’s associated with the list, including view page url’s, or list form url’s. 

This should be much easier to achieve by using the object model, in my opinion.  String parsing of the url is not my favorite, but I couldn’t find a better way to accomplish it. 

If you know of an easier way to accomplish this, please leave me a comment.  Otherwise, you can steal this from me, if you want it!

/// <summary>
/// Gets an SPList based on the url to the list
/// </summary>
/// <param name="listUrl">Full url to the list</param>
/// <returns>SPList object, null if list is not found</returns>
public SPList GetListByUrl(string listUrl)
{
    SPList list = null;

    try
    {
        using (SPSite site = new SPSite(listUrl))
        {
            if (site != null)
            {
                // Strip off the site url, leaving the rest
                // We'll use this to open the web
                string webUrl = listUrl.Substring(site.Url.Length);

                // Strip off anything after /forms/
                int formsPos = webUrl.IndexOf("/forms/", 0, StringComparison.InvariantCultureIgnoreCase);
                if (formsPos >= 0)
                {
                    webUrl = webUrl.Substring(0, webUrl.LastIndexOf('/', formsPos));
                }

                // Strip off anything after /lists/
                int listPos = webUrl.IndexOf("/lists/", 0, StringComparison.InvariantCultureIgnoreCase);
                if (listPos >= 0)
                {
                    // Must be a custom list
                    // Strip off anything after /lists/
                    webUrl = webUrl.Substring(0, webUrl.LastIndexOf('/', listPos));
                }
                else
                {
                    // No lists, must be a document library.
                    // Strip off the document library name
                    webUrl = webUrl.Substring(0, webUrl.LastIndexOf('/'));
                }

                // Get the web site
                using (SPWeb web = site.OpenWeb(webUrl))
                {
                    if (web != null)
                    {
                        // Initialize the web (avoids COM exceptions)
                        string title = web.Title;

                        // Strip off the relative list Url
                        // Form the full path to the list
                        //string relativeListUrl = listUrl.Substring(web.Url.Length);
                        //string url = SPUrlUtility.CombineUrl(web.Url, relativeListUrl);

                        // Get the list
                        list = web.GetList(listUrl);
                    }
                }
            }
        }
    }
    catch { }

    return list;
}

Enjoy!

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SharePoint TechFest 2009 – Dallas, TX

I want to thank everyone who attended my session on SharePoint Workflow with Visual Studio at our TechFest event yesterday.  Please feel free to post any comments (good or bad) about my presentation or the event. 

Demo source code is posted on Nakido until the Techfest site is updated with session content.

SharePoint WorkFlow with Visual Studio – Downloads

SharePoint WorkFlow with Visual Studio – References


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SharePoint 2007 100% CPU Spike – Blue Screen 0x0000001d

Problem

SharePoint 2007 Web Front End (WFE) servers crashing repeatedly.  Environment is SharePoint 2007 (MOSS Enterprise) 64-bit running on Windows Server 2008 Standard.  Server was crashing repeatedly with CPU spiking to 100%, blue screen, and server rebooting itself.  System log showing BugCheck event (1000) entry with code 0x0000001d:

The computer has rebooted from a bugcheck.  The bugcheck was: 0x000000d1 (0xfffff9802ea0ef50, 0x0000000000000002, 0x0000000000000000, 0xfffffa6004e06ed9). A dump was saved in: C:\Windows\MEMORY.DMP.

Resolution

After a lot of troubleshooting, it turns out it was Trend Micro Common Firewall Driver (Trend Micro OfficeScan Client 8.0).  When we disabled the firewall, problem resolved.

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Visual Studio 2008 Workflow Project Wizard – SharePoint Not Installed

Problem:

I’m creating a SharePoint Sequential Workflow using Visual Studio 2008 (SP1) with .Net 3.5 SP1 installed.  This is on a Windows 2003 R2 VPC with SharePoint 2007 (MOSS Enterprise) installed on the local machine for development.  A Collaboration Portal is installed on a web site with host headers (portal) assigned to port 80.

When I create a new workflow project, the wizard asks for a path to the SharePoint site.  I type in my url (http://portal in my case), and the project wizard fails, saying “SharePoint server not installed. Please run Microsoft Office SharePoint Server 2007 setup.”  

VS2008WF-SharePointNotInstalled

I’m logged in as the farm administrator.  I thought it might be a permissions issue (my farm admin doesn’t have full rights on the domain), so I went back and gave it full Domain Admin rights in case that was the problem.  Still failing!!

What the hell?

Resolution:

It turns out that the wizard does some funny business behind the scenes, calling the database directly.  When I give my development account (farm admin) account full rights (dbo) to the SharePoint content database for my portal site, bingo!  Works like a champ. 

After only an hour or two spinning my wheels.  Sigh….


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SharePoint – WSPBuilder Workflow Failed On Start

Building a SharePoint 2007 workflow using WSPBuilder and Visual Studio 2008.  Love, love, love the WSPBuilder tool, but the workflow templates could use some work.  Ran into this one today…

Problem

I was receiving “Failed on Start (retrying)” errors.  SharePoint logs showed “The workflow failed validation” exceptions.  This usually means a problem with the .rules files associated with a Declarative Rule Condition.  

I changed my While activities to use code conditions instead, and the problem went away.  But I really wanted to find the source of the issue.  After much trial and error and fruitless searches on the web, I finally found it.  Turns out, it was a missing import target declaration in the .csproj file created by WSPBuilder when I created a workflow project using the “WSPBuilder Workflow with Workflow” project template.

Resolution

To fix the problem, opened up the project file and added the missing import target line (in green), below. Evidently, this line tells studio to include the .rules in the assembly.

     <Import Project=”$(MSBuildBinPath)\Microsoft.CSharp.targets” />
     <Import Project=”$(MSBuildExtensionsPath)\Microsoft\Windows Workflow Foundation\v3.5\Workflow.Targets” />

Reopened the project, recompile, build wsp, redeploy.  Bingo!  Now my workflow works with Declarative Rule Conditions, as it should!

Credits

Thanks to Greg G’s post here that pointed me in the right direction.


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SharePoint – Size of Web Site or Folder (Easy Way)

Ok, this is painfully easy.  Setup a Network Place in Windows Explorer, browse to the web site or folder in question, right-click -> Properties. 

Duh!!  Sometimes the solution is literally staring you in the face!  Thanks to Kelly Ballard for pointing this one out.

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SharePoint 2007 API – How To Change Layout and Publish Page

The hardest part about this (by far) is figuring out how to publish the page after you’ve made your changes.   Every time I need to do it, I have to dig up some old code.

Thought I’d blog it this time, to make it easier on myself next time around.

using Microsoft.SharePoint;
using Microsoft.SharePoint.Publishing;
...

using (SPSite site = new SPSite("http://portal"))
{
    SPWeb web = site.RootWeb;

    // Check to ensure the web has publishing turned on
    if (!PublishingWeb.IsPublishingWeb(web))
    {
        throw new ApplicationException("Web does not have publishing enabled");
    }

    // Get a reference to the publishing web and publishing site    
    PublishingWeb pubWeb = PublishingWeb.GetPublishingWeb(web);
    PublishingSite pubSite = new PublishingSite(web.Site);

    // Get page layout from the page layouts collection    
    PageLayoutCollection siteLayouts = pubSite.GetPageLayouts(false);
    PageLayout myLayout = siteLayouts["/_catalogs/masterpage/MyLayout.aspx"];

    // Get a reference to a publishing page
    PublishingPageCollection pages = pubWeb.GetPublishingPages();
    PublishingPage page = pages["pages/default.aspx"];
    
    // Check out the list item as needed
    bool forceCheckout = page.ListItem.ParentList.ForceCheckout;
    if (forceCheckout)
    {
        // Is the page checked out?
        if (page.ListItem.File.CheckedOutBy != null)
        {
            // Throw an exception if the page is checked out
            string pageCheckedOut = string.Format("Page {0} is checked out by {1}", page.Url, page.ListItem.File.CheckedOutBy);
            throw new SPException(pageCheckedOut);
        }

        // Check out the page
        page.CheckOut();
    }

    // Change the page layout
    page.Layout= myLayout;

    // Update the page and check in changes
    page.Update();

    // Publish the page
    // This handles the page checkin and publishing the draft
    ApprovePublishingPage(page, "Modified page layout");

}

/// <summary>
/// Approves changes to a publishing page
/// </summary>
/// <param name="page">PublishingPage with changes to be published</param>
/// <param name="comment">Comment associated with the change</param>
public void ApprovePublishingPage(PublishingPage page, string comment)
{
    // Check in the page if required
    SPFile pageFile = page.ListItem.File;
    if (pageFile.Level == SPFileLevel.Checkout)
    {
        pageFile.CheckIn(comment, SPCheckinType.MajorCheckIn);
    }

    // Skip these steps if the parent list doesn't support moderation
    if (page.ListItem.ParentList.EnableModeration)
    {
        // If page is in "pending" status, approve it
        SPModerationInformation modInfo = page.ListItem.ModerationInformation;
        if (modInfo.Status == SPModerationStatusType.Pending)
        {
            pageFile.Approve(comment);
        }

        // If page is in draft status, publish it
        if (modInfo.Status == SPModerationStatusType.Draft)
        {
            pageFile.Publish(comment);
        }
    }
}

Enjoy!

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