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Binding a DropDownList to a GridView

Posted on 2009-04-05
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Last Modified: 2012-05-06
Experts,

I have a grid view that's tied to a database table.  One of the fields is Product_Category.  I want to select a value for that field from a DropDownList and filter the grid accordingly.  How do I do that?
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Question by:NigelRocks
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Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 24072589
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by:NigelRocks
ID: 24072604
That's not quite what I'm looking for.  I want to use a DropDownlist OUTSIDE the grid to filter the contents of the grid.
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Guy Hengel [angelIII / a3] earned 2000 total points
ID: 24072626
ok, I see.

you put the dropdownlist, and put the usual code to fill this list from the data source (dataset/datareader) as you need on the first page_load...

ensure the dropdown is "autopostback", and on the selection change event, you will have to run the code to re-query or only re-bind the data grid. the choice depends on how much data you have if unfiltered, and how much time the query for unfiltered/filtered takes.
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Author Comment

by:NigelRocks
ID: 24072714
I'm assuming I re-query against the DataSource of the GridView.  How do I do that?
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by:Guy Hengel [angelIII / a3]
ID: 24072752
how do you run the data source initially?
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Author Comment

by:NigelRocks
ID: 24072785
I have a dropdownlist bound to a table datasource and a gridview bound to a table source.  I run them by hitting "click".
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Assisted Solution

by:Guy Hengel [angelIII / a3]
Guy Hengel [angelIII / a3] earned 2000 total points
ID: 24072820
can you show the relevant code that you use to query?
in there, you have to use the dropdown's selecteditem property (if != null), to use for example the value, to build the query...
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