An error occurred during local report processing.

The definition of the report ‘/Main’ is invalid.

An internal error occurred on the report server. See the error log for more details.

For my example, I’m using a parameter named “Time” with choices “Morning”, “Noon”, and “Night”.  The values are M, N, and I respectively.  You can see how I set up the parameter in the following screenshot.

You can accomplish having all the checkboxes selected by default in two ways.  The first way is to pass an object array of values, and the easiest way to do that is to use the Split command to split a string into a string array.  I used =Split(“M,N,I”,”,”) as my default.  I had to provide the second parameter for Split, the delimiter, because the default is space.

The second, and easier method, is to just add a line item for each item you want checked, as demonstrated in this screenshot:

Here is the resulting parameter list, showing all the items selected (same for either method):

Sometimes, you need to display the parameters of your report, perhaps so it could be regenerated later.  You’ll need to print out that object array, so use the opposite of Split, Join.  Below is a textbox with an expression of =Join(Parameters!Time.Label, “, “), which joins the parameter values together with a comma and space separator.

Here is the result of the code, with two parameters selected shown:

If you only put the parameter label in the textbox (i.e. using code =Parameters!Time.Label) then when you display the report, you’ll get the famous Reporting Services #Error message.  You have to use Join in this case.

If, somewhere in the site author tree, you have user accounts that no longer exist, you will encounter the “User not found” error while viewing the report and browsing the list of shared data sources.

I found two good blog articles about this issue as well as a solution here:

• Wherefore Art Thou Author?
• Resetting the Author on a SharePoint site, or Wherefore Art Thou Author Redux

I modified the code a bit to just show the site author without resetting it.  I also changed the code to explicitly dispose of the SharePoint objects.

The utility takes two parameters, the first is the site URL.  If you only pass one parameter, it looks up the site author.  If you pass a second parameter (in the format of DOMAIN\USER), the site author will be reset to the value you supply.

To build, run this from the command-line:

%WINDIR%\Microsoft.NET\Framework\v2.0.50727\csc /target:exe /out:SPResetAuthor.exe SPResetAuthor.cs
/reference:"%COMMONPROGRAMFILES%\Microsoft Shared\web server extensions\12\ISAPI\Microsoft.SharePoint.dll"

Source code of SPResetAuthor.cs:

using System;
using System.Text;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Administration;

// Original code from: http://blog.krichie.com/2008/09/12/
//      resetting-the-author-on-a-sharepoint-site-or-wherefore-art-thou-author-redux/

namespace SPResetAuthor
{
  class Program
  {
    static void Main(string[] args)
    {
      if (args.Length < 1)
      {
        StringBuilder sb = new StringBuilder();
        sb.Append("\nSYNTAX: SPResetAuthor.exe (Site URL) [new owner]  \n");
        sb.Append("\nwhere:\n\n");
        sb.Append("\n\t(Site URL) - The web URL for"
            + " the site i.e. http://sharepoint/site/");
        sb.Append("\n\t[new owner] - The login account"
            + " for the new author, i.e. DOMAIN\\USER");
        Console.WriteLine(sb.ToString());
        return;
      }
      // Open the site collection
      Console.WriteLine("Opening site collection for: {0}", args[0]);
      using (SPSite site = new SPSite(args[0]))
      {
        // Open the web via the URL passed in
        Console.WriteLine("Opening site (web)...");

        using (SPWeb web = site.OpenWeb())
        {
          Console.WriteLine("Site (web) title: " + web.Title);
          if (args.Length == 1)
          {
            Console.WriteLine("Attempting to retrieve author for site");
            try
            {
              Console.WriteLine("web.Author: {0}", web.Author.ToString());
            }
            catch (Exception ex)
            {
              Console.WriteLine("Exception occured:\n{0}", ex.ToString());
            }
          }
          if (args.Length == 2)
          {
            Console.WriteLine("Resetting Author to: {0}", args[1]);
            SPUser user = web.EnsureUser(args[1]);
            web.Author = user;
            web.Update();
            Console.WriteLine("Author for site {0}, reset to {1}", args[0], args[1]);
            Console.WriteLine("Author ID: " + web.Author.ID.ToString());
            Console.WriteLine("Author Name: " + web.Author.Name);
          }
        }
      }
    }
  }
}

The user can interactively sort on a header textbox by just setting the “interactive sort” properties:
http://weblogs.sqlteam.com/joew/archive/2008/08/02/60666.aspx

You can also sort using standard report parameters:
http://www.databasejournal.com/features/mssql/article.php/10894_3492236

The answer: not much.

Virtual Earth does has a stellar SDK. The SDK is all JavaScript based, so it may not be used by SQL Server Reporting Services. Virtual Earth does not have a static mapping API. However, there are unsupported ways to get a single image tile–I used this virtual earth example application (veTile) as a basis for retrieving the tile URL.

I translated the code from C# to VB.NET so I could use it directly in reporting services. The code allows you to provide a latitude, longitude, and a zoom level and get back the closest virtual earth tile. The problem is that the resolution is only as good as a single map tile. The actual location of the latitude and longitude could be anywhere on the tile.

Virtual Earth mapping example

The good news, like the Google maps example, is that you can use the tiles in SSRS because no JavaScript is required. If you find a way to improve the resolution, let me know.

The SSRS source code of the report: Virtual Earth Mapping Example source code (vemappingexample.rdl)

In case you just want to get the map tile URL in Visual Basic, I am providing the Virtual Earth Helper source code (VB.NET code). The class (VEHelper) has a single public static method (GetVETileUrl).

One difference between them – the names of the Application Pool that SharePoint was running under.  In development it was just “spsite” but in production it was “www.spsite.com”.

I renamed the application pool and *poof*, the site began to work.  I don’t understand the mechanism, but just thought I’d post in case someone else out there encounters it.

UPDATE: I’ve blogged about another reason why you might get the “User not found” error and possible solutions.