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Docs > API Reference > DevExtreme-Based Controls > DevExtreme.AspNet.Mvc.Builders.DataSources > StaticJsonDataSourceBuilder > Methods > OnInserting
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StaticJsonDataSourceBuilder.OnInserting Method

Name Parameters Description
OnInserting(RazorBlock) jsFunc A function that is executed before a data item is added.
OnInserting(String) jsFunc A function that is executed before a data item is added.