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By annual ridership, the New York City Subway is the busiest rapid transit rail system in both the Western Hemisphere and the Western world, as well as the seventh busiest rapid transit rail system in the world; only the metro (subway) systems in Beijing, Shanghai, Seoul, Tokyo, Guangzhou, and Moscow record higher annual ridership.

Asp net 2 0 gridview onrowupdating

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I am using a SQLData Source to populate my gridview in ASP. When I hit Edit, the textboxes appear and I am able to edit my values. I am using a SQLData Source to populate my gridview in ASP. When I hit Edit, the textboxes appear and I am able to edit my values. In the Row Editing function, the edit textboxes appear and I can get the "old" values Then the page renders, I edit the textboxes and hit Update.

When I hit Update, the changes are not saved, and there is no error message. When I hit Update, the changes are not saved, and there is no error message. Then the page posts back, the text boxes go back to being labels and the new values are lost, and the Row Updating code never fires. Yes, I did put the breakpoint at the Row Updating line (and not in the function).

What happens with this is that the source is being created every time the user submits the page.

This means that when the user does an update, the data from that update is lost.

This can be a useful opportunity to save information to a historical record.

For example, maybe you want to check if the has user actually changed anything before you save the before and after information to a historical table.

I have a Grid View control and use old style manual binding with a Data Source property and invoke the Data Bind() method. Luckily in the Grid View Updated Event Args we can get the updated row’s Data Key Names (which in this case is ‘Id’). Here’s the code to get the Id: There’s now no other way to get the edited row number other than looping through the rows of the Grid View and comparing the datakey value of each row with the key that was passed to the on Row Updated method from the Grid View Updated Event Args parameter. To achieve the desired before/after detection behavior, I’ve added a hidden read-only data field in the Grid View markup that will hold the original value of the field. Equals(key Field Value)) { Now that we’ve stepped through the details, let’s look at the Mark Up for the Grid View as well as the methods (in VB. Row Index Dim str Original Ddl Value As String = CType(tmp Row. Text Dim str User Selected Ddl Value As String = CType(tmp Row. That way on the on Row Updated method we have to grab the row that was updated, and then manually compare the state of the user-available ‘Status’ dropdown list with the value in the read-only field. NET and C#) to find the edited grid like and run our custom code. You should create your data source once (on the user's first visit) and store it into Session for later use, and only bind the Grid View to the data source when it is necessary to do so.