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Docs > API Reference > DevExtreme-Based Controls > DevExtreme.AspNet.Mvc.Builders.DataSources > ODataSourceBuilder > Methods > BeforeSend
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BeforeSend
BeforeSend(RazorBlock)
BeforeSend(String)
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ODataSourceBuilder.BeforeSend Method

Name Parameters Description
BeforeSend(RazorBlock) jsFunc A function used to customize a web request before it is sent.
BeforeSend(String) jsFunc A function used to customize a web request before it is sent.