How to Efficiently Insert a DataTable into a SQL Server Database?

Optimize 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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