How to Efficiently Insert a DataTable into a SQL Server Database?
Jan 07, 2025 pm 10:40 PMOptimize batch insertion of DataTable into database
When inserting large amounts of data into the database, row-by-row insertion is inefficient. Using batch insertion technology can significantly improve performance.
SqlBulkCopy implements efficient data insertion
For SQL Server databases, the SqlBulkCopy class provides an efficient way to insert a DataTable into the database in a single operation. This method avoids row-by-row insertion and greatly reduces processing time.
Code Example
The following code demonstrates how to use SqlBulkCopy:
using (var bulkCopy = new SqlBulkCopy(_connection.ConnectionString, SqlBulkCopyOptions.KeepIdentity)) { // 将DataTable列映射到SQL表列 foreach (DataColumn col in table.Columns) { bulkCopy.ColumnMappings.Add(col.ColumnName, col.ColumnName); } // 设置目标表名 bulkCopy.DestinationTableName = destinationTableName; // 设置超时时间(可选) bulkCopy.BulkCopyTimeout = 600; // 将DataTable插入数据库 bulkCopy.WriteToServer(table); }
Custom mapping (optional)
If the DataTable column names do not match the SQL table column names, you can use the ColumnMappings property of SqlBulkCopy to map manually.
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