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

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