October 2010
Intermediate to advanced
1920 pages
73h 55m
English
Content preview from ASP.NET 4 UnleashedQuerying with the
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Querying with the PropertyExpression
The PropertyExpression enables the developer to use the query extender control to filter the result set based on the values of specific columns. Remember that the property expression works only with equality. For example, you cannot use a property expression to filter where the value contained in a column is less than or greater than some other value.
The following example shows how to filter a data source of ransom demands in which the ransom value is selected from a drop-down box:
There’s actually quite a bit of interesting functionality in the preceding code. The first thing you see is that we have a drop-down ...
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