需添加一个using System.Linq; 引用

  public void BulkInsert<T>(string connection, string tableName, IList<T> list)

        {

            using (var bulkCopy = new SqlBulkCopy(connection))

            {

                bulkCopy.BatchSize = list.Count;

                bulkCopy.DestinationTableName = tableName;

                var table = new DataTable();

                var props = TypeDescriptor.GetProperties(typeof(T))

                                           .Cast<PropertyDescriptor>()

                                           .Where(propertyInfo => propertyInfo.PropertyType != null

                                                && propertyInfo.PropertyType.Namespace != null

                                                && propertyInfo.PropertyType.Namespace.Equals("System"))

                                           .ToArray();

                foreach (var propertyInfo in props)

                {

                    bulkCopy.ColumnMappings.Add(propertyInfo.Name, propertyInfo.Name);

                    table.Columns.Add(propertyInfo.Name, Nullable.GetUnderlyingType(propertyInfo.PropertyType) ?? propertyInfo.PropertyType);

                }

                var values = new object[props.Length];

                foreach (var item in list)

                {

                    for (var i = ; i < values.Length; i++)

                    {

                        values[i] = props[i].GetValue(item);

                    }

                    table.Rows.Add(values);

                }

                bulkCopy.WriteToServer(table);

            }

        }