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We have an application which creates maintenance screens based on an xml configuration file. This all works However, we have a new requirement to add Drop Down Lists to some columns to enforce data integrity.
I have therefore added the relevant xml, and when creating the grid, create the column as a Template Field and the Edit Item as a Drop Down List with its own Sql Data Source.
I worry it will still dont have your new value, but let`s try.
The other solution is to drop that dynamic control creation and uses standard item and edit templates (declaratively in the aspx file) With just Build Grid() called, then the ddl is null.
From what was said in the other comment, should I be calling the Build Grid from somewhere other than Page_Load()?
What happen if you leave the Bind Grid(); at the end but call Build Grid(); before finding the ddl?
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i went through for loop and if loop and did all things which were of total failure i came across this right now. The code which you provided roughly a fortnight has done wonders for me. Click 'Display the Table with data in the gridview 'clear the current content of the Table dt. Find Control("txt City"); and i assume that the txt City. Old Values and New Values both have length 0, and the Text Box approach described above gives a null reference after conversion. I've posted the ASP Code, and decided to skip the actual binding code, since it works great; checked it with the debugger.
So far so good, this all works, the grid is displayed, the Drop Down List appears, filled with the correct data, shows the correct initial item and lets the user select another. The when trying to get the value from the Drop Down List in the Row Updating event, I cant find it. I create a Recursive Find Control method that ran through every control on the page, and it cant find it.
Ive tried peeking in the cell controls in the debugger and its just not there. Ive duplicated it in a simpler test page, with a test database.
In data driven web sites, users are normally allowed to view data and administrators are allowed to add, edit or delete data.
In this tutorial I will show you how you can create an editable Grid View control for administrators to modify database records directly into the Grid View control.
Now I will show you the C# code behind file of the above ASP.