CODEWITHSUNDEEP
asp.net
Trent
Trent

Reputation: 1109

Setting value of dropdownlist which a data source parameter is bound to

I have some drop down lists on a page which get their SelectedValue from a session variable. This allows the value of the dropdowns to be saved across multiple pages.

Problem is the dropdown selected value is being used as a parameter to a separate data source on the page.

If I try to set the dropdown list's value before the dropdown list is databound, I get an exception because the dropdown list has not been populated yet. If I try to set the dropdown list's value too late, the other data source will be executed with the original value of the dropdown list instead of it's current.

Is there a proper order to handle these events in?

Upvotes: 0

Views: 577

Answers (1)

Michiel van Oosterhout
Michiel van Oosterhout

Reputation: 23094

Don't do binding on the data source until it has had time to get the value from the dropdown. Add an event handler to the dropdown's DataBound event. In that event handler you can bind on the data source, using the selected value of the dropdown.

Upvotes: 1

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