Web Forms :: Cascading Drop Down Control & DataSet Using MS Access
May 14, 2010
I am creating a cascading drop down control for use with some drop down lists. They are filled using datasets which connect to a MS Access database. The first dataset was no problem however now I need to create the second which contains a where clause using a passed parameter (ie the selected value from the first drop down). In examples I have seen on the web the @ symbol is used eg WHERE fubar = @varname
When I try to execute this in the query builder in VS2008 I get two errors:
Error in WHERE clause near '@'. Unable to parse query text.
Followed by:
Executed SQL Statement: SELECT DISTINCT tbl_frame.frame_name, tbl_product.frame, tbl_product.model
FROM (tbl_product INNER JOIN
tbl_frame ON tbl_product.frame = tbl_frame.frame_id)
WHERE(tbl_product.model = @model)
Error Source: Microsoft JET Database Engine
Error Message: No value given for one or more required parameters.
It never promts for a variable. If I change the query to be something like WHERE tbl_product.model = 7 it works.
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[Code]....
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[Code]....
WebService (part of it that gets data for my first drop down):
[Code]....
[Code]....
Javascript (tried to set the context key here)[Code]....
[Code]....
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[Code]....
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[Code]....
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