C# 大数据插入

csharp

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2019-1-7

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关于C# 语言进行 大数据插入性能非常好,

 public static 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.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 = 0; i < values.Length; i++)
                    {
                        values[i] = props[i].GetValue(item);
                    }

                    table.Rows.Add(values);
                }

                bulkCopy.WriteToServer(table);
            }
        }