把dataTable表批量的写入数据库

connectionStr：链接字符串；dataTableName数据库中的表；sourceDataTable dataTable的名称

public static void SqlBulkCopyByDataTable(string connectionStr, string dataTableName, DataTable sourceDataTable, int batchSize = 100000)
{
using (System.Data.SqlClient.SqlConnection connection = new System.Data.SqlClient.SqlConnection(connectionStr))
{
using (System.Data.SqlClient.SqlBulkCopy sqlBulkCopy = new System.Data.SqlClient.SqlBulkCopy(connectionStr, System.Data.SqlClient.SqlBulkCopyOptions.UseInternalTransaction))
{
try
{
sqlBulkCopy.DestinationTableName = dataTableName;
sqlBulkCopy.BatchSize = batchSize;
for (int i = 0; i < sourceDataTable.Columns.Count; i++)
{
sqlBulkCopy.ColumnMappings.Add(sourceDataTable.Columns[i].ColumnName, sourceDataTable.Columns[i].ColumnName);
}
sqlBulkCopy.WriteToServer(sourceDataTable);
}
catch (Exception ex)
{

throw ex;
}
}
}
}