Kit Menke's Blog

The goal of this post is to provide an easy to understand example of how to enable editing in an SPGridView. In this case, my datasource of choice is a SharePoint list.

The way that I chose to implement editing in an SPGridView involved two classes:

• SimpleLogic – handles query and update operations
• SimpleSPGrid – handles all of the setup for the ObjectDataSource and the SPGridView

The main advantage for splitting the two classes is to separate all of the business logic into one class. Ideally, you should be able to completely change how the SimpleLogic class retrieves/updates data without changing the SimpleSPGrid code.

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I was developing an input form for a search when I came across the need to allow the user to filter items using a date range. I had two input boxes where the user could enter a start and an end date. For some of the most common date ranges, I decided to create links that could be clicked to auto-populate the start/end date textboxes. For example, searching for items that were created last week or last month. Using JavaScript’s Date object, I was able to put together some nice examples.

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If you’ve done any work with SharePoint and SPAuditEntry, you may have noticed the distinct lack of Create event. Instead, two Update events are created which means some extra processing is required.

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Add this to the list of things every SharePoint developer should know (up there with disposing SPWebs and SPSites).

In general…

1. Don’t update SharePoint objects on a GET request
2. Call SPUtility.ValidateFormDigest() before anything on a POST request

Here are the two links to read:

• What you need to know about AllowUnsafeUpdates (Part 1)
• What you need to know about AllowUnsafeUpdates (Part 2)

Two identical custom lists with the same columns. The only difference is that one list has columns added using Site Columns and the other list had columns added directly to the list. The same? Not so much…
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