![]() ![]() Matching is successful if the value and parameter have the same type (as in the examples so far), or an implicit conversion is possible between the value's type and the parameter's type. The child components declare cascading parameters with different names, but they are share the same type - string. In the example above, the cascading value is a string. Lookups use an internal algorithm that identifies a key field in a data source. Use the secondary lookup’s CascadingOwner property to specify the primary lookup. The default mechanism for matching cascading values to parameters is based on type. LookUpEdit, GridLookUpEdit, and SearchLookUpEdit controls can automatically filter their data sources based on a value in another lookup. The final rendered output looks like this (borders and spacing added to help identify each component): In the following example, a CascadingValue component exposes a value represented by the cascade variable to two descendant components, Child1 and Child2 : Cascading Value Discover more music, concerts, videos, and pictures with the largest catalogue online at Last.fm. For guidance on enabling communication from a child component back to a parent component, refer to EventCallback parameters We use the CascadingValue component when the parent wants to share data with its descendantsÄescendant components opt in to cascaded values by declaring a property decorated with the attribute. Listen free to The Cascading Strings The Cascading Strings Around the World.
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