If you wish to bind the report to the data directly with code the supported data types are arrays, collections, DataSet, DataTable, DataView, and DbDataAdapter.
In general, our recommendation is to use DataSource components and to specify declaratively how the data needs to be retrieved. For example, you can convert the Excel file to CSV format and use CsvDataSource component to fetch the data from that file.
For additional reference, please check help articles under Connecting to Data section from our online documentation.
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