sl的自动递增 [英] incrementation of sl no automaticaly

问题描述

我正在.net 3.5中开发Windows应用程序.现在我对帐单格式存有疑问.在我的应用程序中，我通过设置属性"identity specification"将sl no设置为自动递增.从1开始直到我第一次调试应用程序时继续，下一次它会像明智地显示Max(slno + 1).但是在每种计费方式下，我都不需要从1开始.

我正在等待重播
谢谢我Advance

I am developing my windows application in .net 3.5 .now i have a small doubt in my billing form .in my application i set sl no as auto increment by seting the property "identity specification".its working and shows the result starting from 1 to continues when i debug the application at first ,next time it shows Max(slno+1) like wise .but i need sl no starting from 1 in each case of billing.

i am waiting to favorable replay
thanks i advance

推荐答案

不.它不是那样的.
当您指定一个Identity时，它将成为一个由数据库系统控制的字段，并且对于整个表都是唯一的..

您不能有两个相同的Identity值；就像在钞票上有两个相同的序列号一样:当人们注意到时，事情很快就会变得非常错误！

如果您需要帐单中的序列号，则必须自己为每一行创建它们.

Nope. It don''t work like that.
When you specify an Identity is becomes a field which is controlled by the database system and is unique for the whole of that table.

You cannot have two identical Identity values; It would be like having two identical serial numbers on banknotes: Things start to go very wrong very quickly when people notice!

If you need sequential numbers in your billing form, you will have to create them yourself for each row.

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