Displaying attachments in a DataFormWebPart

A little problem I ran across on a recent project. I needed to display the attachements link for a list item in a custom DataFormWebPart.

The first thing I did was to add the attachment column to the DataFormWebPart all this resulted in was a yes or no value. After a bit of searching on the web I found the solution. The following lines need to be added:

<SharePoint:AttachmentButton ControlMode="Edit" Enabled="true" ItemId="{@ID}" runat="server" Visible="false"/>
<SharePoint:AttachmentsField ControlMode="Display" ItemId="{@ID}" EnableViewState="true" FieldName="Attachments" runat="server"/>

Relevant links:
http://support.microsoft.com/kb/953271
http://social.technet.microsoft.com/Forums/en-US/sharepointsocialcomputing/thread/80a27347-fbc3-40e0-a622-cce5675579c4/  
http://social.msdn.microsoft.com/Forums/en/sharepointcustomization/thread/c257a894-859a-406c-b3bd-d021ef1b7a75

HTML 5 Persistent Storage Risks

At the Intel Security Conference last week I attended a presentation by Ming Chow on Abusing HTML 5. This sparked of some research on my part on the persistent storage API’s that the W3C is promoting.

I started with a deep dive into the Web SQL Database, which I felt was most risky implementation and a good target for SQL and Command injection attacks. However, it seems that the W3C is not going forward with the recommendation of using Web SQL Database. Though the functionality is still available to Webkit Layout engine used by several browsers, Google Chrome, Opera and Safari. This also means that mobile devices which utilize Webkit could use the capability. It also turns out that Webkit can be used in IE as an add-in, so theoretically the Web SQL Database API functionality could be available in IE as well.

More information on Web SQL Database:
http://www.w3.org/TR/webdatabase/
http://en.wikipedia.org/wiki/Web_SQL_Database
http://en.wikipedia.org/wiki/Comparison_of_layout_engines_(HTML5
http://www.roughlydrafted.com/2009/09/25/google-sneaks-webkit-html-5-support-into-internet-explorer/

More Research:
Since Web SQL Database was being deprecated I started researching the risks of IndexedDB and Web Storage API for client side persistent storage.

For IndexedDB See section 7 for the currently identified risks of using IndexedDB API. http://www.w3.org/TR/IndexedDB/ Currently only supported in Firefox and is actively being standardized by the W3C. Some Support in other layout engines but expect support to grow as specification matures.

For Web Storage see section 7 of the specification http://www.w3.org/TR/webstorage/#security-storage On top of the risks outlined in the specification also consider that race conditions can exist and can be exploited (At least at the current implementation of the standard, see warning at top of specification).

Risk mitigation strategies:
• Do not use Web SQL Database API, it has been deprecated.
• Treat data coming from IndexDB and Web Storage as untrusted as it could have been corrupted by a malicious user / application.
• Be aware of Race conditions when using Session Storage.

Potential future research area:
• Since SQLite seems embedded in the browsers see if the new API allow previous SQLite bugs to be used: http://www.cvedetails.com/vendor/9237/Sqlite.html
• Mozilla Firefox stores all Web Storage objects in a single file named webappsstore.sqlite. The sqlite3 command can be used to show the elements stored therein
• Drive by install of WebKit in IE using XSS?
   o Everyone trusts Google right?
• Develop an exploit using Web SQL Database to gain access to system resources.
   o It’s going to be around for a long time.

My Take on SharePoint Customization / Complexity

Here is my take on SharePoint Customization / Complexity. What do you think?

Getting the Display value of a variable reference field

Getting the Display value of a variable reference field

On occasion there is need to get the display value of reference variable.
There are two ways to accomplish this first is make the call back to the server and query the table.

The second and more efficient way is to use get display box function of g_form.


var refFieldDispVal = g_form.getDisplayBox('the reference field').value;


Thanks to Mark Stanger for this pointer.

Adding a Reference Field to a UI Page

The following code is required to add a reference field to a UI Page. Note this does have type ahead on it as well.

This example references the sys_user table and only returns accounts which are active and not locked out.

To use this code add it to the html section of the ui_page.

<j:set var="jvar_user_query" value="QUERY:active=true^locked_out=false" />

<input id="user_query" type="hidden" value="${jvar_user_query}" />



<g:ui_reference name="${jvar_user_query}" table="sys_user" />



This enables the use of a reference field when custom forms are required.

JavaScript Code Snippet: Find and Replace all

Here is a JavaScript code snippet for a find and replace all.

This example code finds if there is an instance of three dashes in the string and replaces with three spaces.


if(str.indexOf('---') != -1){
str = str.replace(/---/g,' ');
}


New Photo Viewer

I've been playing with a new JQuery Photo Viewer control called Cloud Carousel written by Professor Cloud

This new control has helped me learn about image resizing as well, which has helped me shrink the size of the banner image improving performance.

Check out my Gallery here: http://dalecox99.com/Fun%20Stuff/photos.aspx

On the Photo Page I created a new master page that give the maximum view window to see all the photos.

I hope you enjoy the photos.

Silverlight Unit Testing Framework

I have to admit I haven’t dug into a lot of automated testing because of so much of my work being based on User Interface and asynchronous calls but I came across this Testing frame work and it looked pretty interesting as it simulates the user environment including the asynchronous capabilities, http://www.jeff.wilcox.name/2009/03/asynchronous-testing/ .

Excel Cell Formating

A little reference Gem about formatting cell values, related to my post about Exporting to Excel.

On occasion the format of the Cell will need to be specified. In my case I needed to preserve leading zeros on the record.

Evidently I don’t know the right search terms to find out where this is documented but after a rather long search I found that to get the text format I needed to use cell.NumberFormat = "@";

Many Thanks to today4me over at dreamincode.net http://www.dreamincode.net/code/snippet1218.htm for posting this little guide on formatting. I would have never guessed the @ symbol for the format.

SharePoint 2010 Work Flow (WF) Quick Hits

SharePoint Work flows are pretty strait forward for the most part but there are a couple items that are worth remembering. Some of them I have had to learn twice so this list I’ve made to review before I do WF implementations, in an effort to not have to learn things a third time :)

These notes are specific to Work Flows in SharePoint Designer.

1. Always save then publish.

2. If you have a test page open after the WF has been updated reload the page before initiating the WF. SharePoint will force you to do this anyway but you can lose any changes you made to test the WF.

3. When sending an e-mail via WF using a look-up person value select e-mail address, semicolon delimited for the look-up value.

4. In general, if you are using a look-up values in the WF verify it is not empty (Null) before using. If the error, Coercion Failed: Input cannot be null for this coercion, it is because a field has a null value or is empty. The Fix is to use the conditional IF-Else construct to check for Null before executing the actions, example: IF field is not empty.

5. A record seems to only be updateable by a WF once.

6. Conditional statements like IF-Else don’t move up and down so well in the WF step.

7. To create a state machine using a WF
a. Create a list or column to contain a copy of the field(s)
b. Seed the field with a copy of the content
c. Create a WF that accounts for the following conditions
d. Initial creation of the list item
i. Might be necessary to seed the list or column
e. On value change account for the following conditions
i. Different Content -> Previous Content is different
ii. Different Content -> Previous Content was Blank
iii. Current Content is Blank - > Previous Content was not
iv. Blank -> Blank
1. No action should be required as the state did not change
f. For an example / more information on how to do this see this link: http://office.microsoft.com/en-us/sharepoint-designer-help/watch-this-run-a-workflow-when-a-specific-field-changes-HA010256419.aspx

8. Hyperlinks made in the WF e-mail editor can be copied and pasted but the pasted version may need the link to be adjusted. Look-ups used in the e-mail editor cannot be copied and pasted.

Silverlight User Control Navigation Solution

There are two solution approaches when implementing a navigation solution, the capability to navigate between pages using Silverlight. One approach is to use user controls and is what this write-up focuses on the other approach which was recently added in Silverlight 4. For the most part this is a summary of the demo video provided by Jesse Liberty from Microsoft.

Steps for Creating a User Control Navigation solution
1. Create Silverlight Application
2. Add a new page called NavigationFrame
a. Delete the Grid control LayoutRoot in the NavigationFrame.xaml file
b. In the code behind file add the code below to the constructor to load a default page in this example it is the main page

if (this.Content == null)
{
this.Content = new MainPage();
}

c. Add a navigate method to change the content displayed in the page

public void Navigate(UserControl nextPage)
{
this.Content = nextPage;
}
3. Update the App.xaml.cs to load the NavigationFrame Page instead of the MainPage on Application load
a. In the Application_Startup method change MainPage to NavigationFrame
4. Create another Silverlight page called Page_2
5. Add navigation Controls
a. In my case I am using buttons for navigation and added them to both pages (MainPage and Page_2)

<button name="buttonSwitch" type="submit" width="75" content="Switch" height="23" horizontalalignment="Left" margin="132,212,0,0" verticalalignment="Top" click="Switch_Click">

6. In the code behind of both MainPage and Page_2 the even handler needs to be added to swap between the target pages
a. Example of code behind for Page_2

private void Switch_Click(object sender, RoutedEventArgs e)
{
NavigateFrame ps = this.Parent as NavigateFrame;
ps.Navigate(new MainPage());
}





Reference: User Control Implementations
Jesse Liberty Demo Video - http://www.silverlight.net/learn/videos/silverlight-videos/using-multiple-pages-part-1/
Slightly Different implementation use a service approach- http://nerddawg.blogspot.com/2008/06/pages-in-silverlight.html
Similar example - http://www.c-sharpcorner.com/UploadFile/nipuntomar/Silverlight07082008154003PM/Silverlight.aspx

Navigation Application (SL4)
Basic implementation write up- http://www.silverlighttoys.com/Tutorials.aspx?tutorial=1
Detailed write-up - http://stuff.seans.com/2010/05/07/silverlight-4-project-types-part-ii-%E2%80%93-silverlight-navigation-application/

JQuery Resources

With the recent uptick in JQuery as a go to client side technology, I wanted to share these resources I recently found.

This is a nice article describing the role of JQuery and ASP.NET as well as some well-founded conjecture on the future of Microsoft support of JQuery.
http://visitmix.com/Articles/Javascript-Libraries-and-ASPNET

This is an online training guide, I’ve only skimmed the content but it looks like a fantastic resource.
http://jqfundamentals.com/book/book.html

Accessing the UI thread in Silverlight

I’m creating a separate class where I want to move all related Client Object Model (COM) code.

In my case for the COM code to work it must update the UI thread. To accomplish this I had to move the reference from the main page, which was apparently passing through the Deployment object, to explicitly calling the Deployment object.

So in the case of the main page or I suspect any xmal pages code behind use this line of code in the ClientRequestSucceededEventHandler method:

this.Dispatcher.BeginInvoke(updateUI);


For separate classes to gain access to the UI thread use this line of code in the ClientRequestSucceededEventHandler method:

Deployment.Current.Dispatcher.BeginInvoke(updateUI);



Reference:
http://www.go4answers.com/Example/error-invalid-cross-thread-access-48335.aspx
Using Silverlight Object Model: http://msdn.microsoft.com/en-us/library/ee538971.aspx

Silverlight Export to Excel

The latest thing I’ve been working on is exporting to Excel from my Silverlight Indicator.

With Silverlight 4 there are two problem domains, In Browser and Out of Browser.

The Out of Browser mode is dead easy using Automation Factory. For it to function it does require the Silverlight App to be locally installed with elevated permissions. There are several examples out there, on the web, of this type of implementation now I leveraged the approach posted by Pradeep at c-sharecorner.com for my application, see his code below. This is a great solution that opens the exported data in an excel spreadsheet.


Solution using Out of Browser Mode
Add reference to Microsoft.CSharp.dll to the project.


using System.Runtime.InteropServices.Automation;
…

///

///This code has been leveraged from the following site:
///http://www.c-sharpcorner.com/UploadFile/pchandraker/1899/
///
///

private void btnExport_Click(object sender, RoutedEventArgs e)
{
dynamic excelApp;
excelApp = AutomationFactory.CreateObject("Excel.Application");
excelApp.Visible = true;
dynamic workbook = excelApp.workbooks;
workbook.Add();
dynamic sheet = excelApp.ActiveSheet;
dynamic cell = null;
int index = 1;
foreach (Employee emp in EmployeeGrid.ItemsSource)
{
cell = sheet.Cells[index, 1];
cell.Value = emp.EmployeeName;
cell = sheet.Cells[index, 2];
cell.Value = emp.EmployeeId;
cell = sheet.Cells[index, 3];
cell.Value = emp.Department;
index++;
}
}

Reference links –
Automation API - http://msdn.microsoft.com/en-us/library/ff457794(v=VS.95).aspx
More documentation - http://msdn.microsoft.com/en-us/library/system.runtime.interopservices.automation.automationfactory(VS.95).aspx
A slightly different implementation - http://www.codeproject.com/KB/silverlight/SL4InteropWithExcel.aspx
A similar implementation - http://deepumi.wordpress.com/2010/06/01/export-datagrid-to-excel-in-silverlight-4-0/

Solution using In Browser Mode

With the Out of Browser Domain covered, I needed to tackle the In Browser Domain. To my surprise there wasn’t as many solutions as I thought there would be out there. Exporting a datagrid to excel would seem like a common enough task. Though I did find one gem in the rough Raelango on codeproject.com had posted a nice solution that works great if the columns are TextColumns or are TextBlocks in a template column. It defiantly got me pointed in the right direction. You can see his solution here: http://www.codeproject.com/KB/silverlight/SilverlightDataGridExport.aspx

I took a similar approach though I ended up customizing the code to fit my customized data types. It led to a nice solution which saves to an XML or CSV file based on the user choice through a standard save dialog.

Libraries for Client Object Model

Ok this falls in to information I’ve had to look-up a couple times now. So I’m posting this to my blog for quick reference in the future.

Libraries required for SharePoint development using Client Object Model

The two files for Silverlight are:
Microsoft.SharePoint.Client.Silverlight.dll
Microsoft.SharePoint.Client.Silverlight.Runtime.dll

They can be located on the server at %ProgramFiles%\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\ClientBin

For sandbox solutions you need:
Microsoft.SharePoint.Client.dll
Microsoft.SharePoint.Client.Runtime.dll

These are located on the server at %ProgramFiles%\Common Files\Microsoft Shared\web server extensions\14\ISAPI

Getting the URL Parameter Using C#

As I’ve been working with the SharePoint COM API in Silverlight more things that were really hard to do or nearly impossible to do with SharePoint Designer (SPD) have become easier. One of the first things I need to do was link the Silverlight applications and my existing pages together which I felt was really easy to do by passing Query String Parameters.

This is really easy to do in C# with the Windows.Browser namespace.

Here is the method I use to accomplish this.

private string getURLParam(string key)
{
string value = "";
HtmlPage.Document.QueryString.TryGetValue(key, out value);
return value;
}

Now I can provide whatever key I would like to consume, in my case a row ID so I know which record to query in the SharePoint list.

Alien Earth Review

Alien Earth by Megan Lindholm

Overall Grade C

This book takes place in a dystopian future long after the earth had been abandoned due to humans killing the planet. Humans are assisted in leaving the planet by the Arthropiana who travel in Beastships which are capable of interstellar travel.

The story is centered on a human crew of the Beastships who are traveling back to earth and the interaction with the Arthropiana co-captain.

Unfortunately the story seemed fairly predictable from plot to the characters, though the character development was paced ok. The one thing I liked, even though I knew how it was going to end by about halfway through, was the ending I felt it really delivered though getting there took a very predictable path.

http://www.meganlindholm.com/novels/alien-earth/

Setting-up SP2010 Dev. Environment (Win 7)

For those that are interested in developing for the SharePoint 2010 Environment to either build a sandbox or standalone solutions here is a quick summary of how to get the development environment set-up for Win7.

Please note that this is a multi-hour process of install / patch / install ... but it is worth it being able to dev for the SharePoint Environment.

• Excerpt from Directions here:
  – http://msdn.microsoft.com/en-us/library/ee554869(office.14).aspx
• Pre-install
  – WCF Hotfix for Microsoft Windows
   • http://go.microsoft.com/fwlink/?LinkID=166231
  – ADO.NET Data Services Update for .NET Framework 3.5 SP1 for Windows 7 and Windows Server 2008 R2
   • http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=3e102d74-37bf-4c1e-9da6-5175644fe22d
  – Microsoft Office 2010 Filter Packs
   • http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=5cd4dcd7-d3e6-4970-875e-aba93459fbee
• Install SharePoint Server (iso can be downloaded from MSDN)
  – Note: The configuration file for the instalation has to be altered. (See full directions)
• Install SharePoint SDK:
  – http://www.microsoft.com/downloads/details.aspx?FamilyID=f0c9daf3-4c54-45ed-9bde-7b4d83a8f26f&displaylang=en

If you already have VS2010 installed no other action needs to be taken. If you don't then you will need to install VS2010.

Large List in SP2010

This is a long post on a problem with SharePoint 2010 that I worked on over the last week. Centered around understand and working with Large Lists in custom forms. You can skip to the bottom to see the summary of the solution I took.

The Problem:
The Original Error: This view cannot be displayed because it exceeds the list view threshold (5000 items) enforced by the administrator.

This single error led me on quite the educational trip. My first reaction crap my web application is broken. Then I mailed the server administrator asking that the limit be increased, complaining how my solution worked in MOSS. :) Luckily I was barely over the 5K limit so deleting some records let me drop below the 5K limit but I had problem with the application and I needed a way to test it while allowing my customers access to their data.

This led to my first workaround:
- Set the selectcommand to “<View></View>”,
- Edit the asp:Parameter MaximumRows and set it to 5K.
- Then apply xslt filtering.
Wince like I did, but it allowed me to work on the site w/o further disrupting my customers activities. There a lot of reason this is a no-no, performance being the biggest one.

Now I could work, experiment, test on the site / list. The server administrators got back to me after I had found this work around and asked me to continue pursuing a solution as MS would one day come back and tell us to set the threshold setting back to default thus putting us right back to square one. I’ll get back to why the administration team did the right thing here. Even though it seems like the simple answer to increase the threshold, DO NOT DO IT! Many thanks to the administration team for keeping me focused on delivering the right solution.

Before I get to that let me explain to those that may be yelling at the screen why didn’t you have a test site and unfortunately my site / application is very dependent on work flows and I have yet to find a good way to migrate those from site to site.

So back to the education, well we were early adopters and I missed the information about large lists and list throttling. Saw the information that the list can contain about 50 mil records, awesome!!...Missed the point about only being able to work with 5K at a time, though I never intended to even work with that large of a number of records.

Root causing the Issue:
Now I had to start scoping the problem I knew two things once a list crosses 5K records it now becomes a large list. What worked on a regular list no longer seems to work on a large list and I can only work with 5K records at a time and my exiting filters were not working before the records were being pulled.

So I needed to understand what a large list was:
- Which led me to this page: http://msdn.microsoft.com/en-us/library/ff798465.aspx
-- The best resource I found was a paper MS wrote about large lists titled “Designing Large Lists Maximizing List Performance” and can be downloaded here: http://www.microsoft.com/downloads/details.aspx?FamilyID=fd1eac86-ad47-4865-9378-80040d08ac55&displaylang=en
--- I was a bit shocked when the doc called out that most users when first faced with this problem are tempted to increase the threshold and it explained why not to take that approach in technical details. (it’s not every day that you can point at a doc and say I behaved exactly that way :) )
-- The second best resource was the help doc (I believe this is a replication of their online help documentation)- http://sharepoint.microsoft.com/blogs/GetThePoint/Lists/Posts/Post.aspx?ID=303

Unfortunately these papers didn’t really deal with my problem exactly. Though it begun to point me in the right direction and to be aware of some of the side effects of the list being a large list and explain what I was experiencing.

Some side effects or symptoms that a list has passed the large list threshold and become a large list or at least what I have experienced:
• Filters that worked previously no longer work
• Sort and filter functionality no longer works
• Some views may not work
• Count on list views will not work

Possible Permanent Solutions:
I first tried a query filtered with an indexed column, according to the documentation this is supposed to be the Holy Grail fix. Unfortunately this did not work as expected and still got the threshold error. So I abandoned this approach, I’ve head numerous issues with DFWP since I migrated to 2010 I figured this was one more thing that was neglected by MS and I’d have to file another bug against 2010.

I next compiled a list of potential workaround with a help of my site / application architect.

- Content iterator
-- http://msdn.microsoft.com/en-us/library/ff798376.aspx
-- Code solution
- Partitioned View
-- http://msdn.microsoft.com/en-us/library/ff798344.aspx
-- Seems to only apply to SQL data sources
- Managed Metadata
-- Will require adjustment to the list
-- Should have been applied at design phase
-- Will require a lot of pre-work in planning before implementing
- Content Query Web Part
-- To enable it
--- http://vspug.com/ssa/2010/02/06/sp2010-tip-content-query-web-part-missing-in-sharepoint-2010/
--- http://social.msdn.microsoft.com/Forums/en/sharepoint2010general/thread/4cfcdb20-0e1e-4651-bfda-008fe554696e
-- To Use it
--- Dated write up - http://blogs.msdn.com/b/ecm/archive/2006/10/25/configuring-and-customizing-the-content-query-web-part.aspx
--- Newer info - http://blogs.msdn.com/b/ecm/archive/2010/05/14/what-s-new-with-the-content-query-web-part.aspx
-- Customize it
--- http://msdn.microsoft.com/en-us/library/aa981241.aspx
--- http://msdn.microsoft.com/en-us/library/ms497457.aspx
- Access Services
-- Dead end
- Re-architect the site using folders and custom content types
-- This would enable easier filtering that would not hit the threshold
-- Similar implementation to Managed Metadata
-Bring in MS SharePoint consultant to solve our problems
-- This was added for completeness… :)

The Final Solution:
While we are eventually going to go to a coded solution hosted in our sites Sandbox we are not there yet. So I focused on the lowest code solutions. I started working with the CWWP (Content Query Web Part). It was the first time I have used it I can see how it can be very useful for someone who didn’t want to edit the XSLT directly. Though it does require some knowledge in how the list is structured. Then I read that the CQWP is an extended DFWP and it was working so it led me back to my CAML Query. I remembered a line in one of the documents that it said when filtering a query for a large list always use an AND operator as an OR will rarely limit the results below the threshold. I knew my CAML Query didn’t have any operators so I just gave it a try using a static true statement with my filter on an indexed column so that I would get an AND operator in the select command.

The static statement is also using an Indexed column (ID) and it is simply comparing to see if it is greater than zero (which is always True).

The CAML Query that works:

selectcommand=
"<View>
 <Query>
  <Where>
   <And>
    <Eq>
     <FieldRef Name="PN_ID"/>
     <Value Type="Text">
      {PN_ID}
     </Value>
    </Eq>
    <Gt>
     <FieldRef Name="ID"/>
     <Value Type="Counter">
      0
     </Value>
    </Gt>
   </And>
  </Where>
 </Query>
</View>"

The CAML Query that did not work (Even though it is using an Indexed Column):
selectcommand=
"<View>
 <Query>
  <Where>
   <Eq>
    <FieldRef Name="PN_ID"/>
    <Value Type="Text">
     {PN_ID}
    </Value>
   </Eq>
  </Where>
 </Query>
</View>"


Summary:
For large lists, do your best to plan ahead.
Try to determine which potential solution is the right one for your audience.
See the “Designing Large Lists Maximizing List Performance” document
If the right solution is to use the DFWP then make sure that you:

• Have at least 1 indexed column you can filter on effectively
• Index Before your list is over the threshold preferably
• Use two filter criteria’s on Indexed Columns to ensure that you have an AND operator in your CAML Query.

Linked Data Ssource Limitation SP2010

Interesting SharePoint 2010 limitation, when using linked data sources ensure that your page does not display over 225 cells per page.

What I mean by Cells is the calculated value of rows by columns.

Unfortunately for whatever reason MOSS (SharePoint 2007) had the capability of going higher than 225 cells without failing but they did not keep the same capability in 2010.

The primary symptom of the error besides the Data View Web Part not rendering is that you end up with a StackOverflowException in the logs. Search the correlation ID you receive in the error in the logs and you will find the corresponding error.

Reducing the page size or displayed columns is really the only non-code fix and is the short term solution I was forced to implement.

The MS rep I discussed this with said the defect is due to the SharePoint Designer render, and recommended a long term solution which will be to implement the page in the sandbox environment using custom built pages with the client object model. He indicated MS may eventually fix the issue.

Bug characterization Information

• Removing the second template call replaced with spaces did not lead to an error.
  This means I still had 375 cells but only 125 contained data from a list the other 250 were just html spaces.
• Tried encapsulating the template call in a variable to see if it would force better memory optimization, this did not change anything.
• This issue seems to only effect joined lists as I have a single list in a Data Form Web Part that is displaying 5 columns by about ~200 rows
• Always fails at 375 cells