Not showing selected value of one drop down list in another of a gridview

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VS2010

Hello guys, I have a gridview with dropdown lists in them. I want the selected value from the dropdownlist to not appear in the next dropdown list.

How can I go about this problem. Links to code and suggestions are most welcome.

Eg : Suppose I have a drop down list for Cities. If I select 'Mumbai' from the first drop down list then 'Mumbai' should not appear in the next drop down list.

Posted 27-Nov-12 3:25am

samrat399

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[no name] 27-Nov-12 9:33am

Make sure that your datasource has event and when the column changes do a validation on that column in your datasources update.

samrat399 27-Nov-12 12:15pm

no, i have the drop down in the same column, how to do that

[no name] 27-Nov-12 12:23pm

Are you using a datatable? If you are then datatables have events, specifically the column changed event, then you can llop through the values of the column to make sure that each one is unique.

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CafedeJamaica · Answer 1 · 2012-11-27T06:27:00

If you are using data tables then you can use the column changed event, if someone changes the dropdown in the data grid, it updates the data table.

You can do a for loop inside the event handler to check to see if the value is unique and change any values that are not unique.

Click the link for a list of datatable events and sample code:-

http://msdn.microsoft.com/en-us/library/9hx67se8(v=vs.100).aspx[^]