How Can I Efficiently Insert a Large DataTable into a Database?

Speed Up Database Inserts with SqlBulkCopy

Inserting large DataTables row-by-row is inefficient. The SqlBulkCopy class offers a much faster solution for bulk data insertion into SQL Server databases.

First, establish a database connection. Then, create a SqlBulkCopy object, providing the connection string. You can also customize options like identity column handling during creation.

Crucially, map your DataTable columns to the corresponding database table columns. If column names align, simply copy them into bulkCopy.ColumnMappings. Otherwise, map them manually.

Finally, specify your target table and, optionally, a timeout, then call WriteToServer. This single call performs the bulk insert, drastically improving performance over individual row inserts.

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