Asp net onupdating
I want to run an if before updating a form view; if yes then..."message" & cancel update query if no continue update query. i've tried this but i'm getting a "obeject instance not set to null instance......" on the first line of the if? This effectively removes the additional parameters from being added. There doesn't appear to be any values actually being passed into this method. Can anyone explain to me why my values are not being carried forward?I've spent about a day and a half working on this issue and was able to get around this by just going with the Grid View's Row Updating event and grabbing values from grid to manually get it to update.I came across a blog post discussing a slick way to use the ASP.NET AJAX Update Progress control to add a gmail-like progress indicator to an ASP. I liked the approach the author used and it clearly works great for scenarios where you want to display a single 'something is happening' message to the user while the page is being updated. If your screens are relatively simple, or if you feel the update should be obvious this is probably not an issue for you.
Ok, So I was able to resolve this issue by going into the On Updating event in the Object Data Source and doing the following below.Therefore, you cannot directly cancel the Update database operation by calling the Cancel method on the Db Command object that is exposed by the Sql Data Source Command Event Args object.You can, however, cancel the database operation by setting the The following code example demonstrates how to display data that is retrieved from a Microsoft SQL Server database in a Drop Down List control and update the record using a Text Box control.However, after the operation completes and the indicator disappears, it is still up to the user to figure out where on the screen (i.e. Unfortunately things aren't so for the web application I am currently working on.A few of the screens contain a number of different sections and users would like to see the indicator rendered over the control (most commonly a Grid View or Details View) that is being updated.
To achieve this, I am using the Update Panel Animation Extender control that is part of the Ajax Control Toolkit (You can follow directions here to install and get started using the toolkit).