检查userId可用性 [英] check userId availability

问题描述

我想使用Check UserId可用性而不刷新表单.
怎么才能解决这个问题.我可以使用ajax或任何其他程序.请提供该代码.我在Sql服务器数据库中使用了UserId字段，在我的网页中使用了一个文本框名称txtUserId.我想如果用户从文本框中离开，那么它会显示一条消息userId是否可用.

请帮忙..我做不到.

在此先感谢

I want to use Check UserId availability without refresh the form.
How can is solve this. Can i use ajax or any other procedure. Please providing the code for that. I used UserId field in the Sql server database and one textbox name txtUserId in my web page. I want if user leave from the textbox then it show a message userId is available or not.

Please help..i can''t do it.

Thanks in advance

推荐答案

所有您想知道的是如何从客户端(Javascript)与服务器进行通讯.

通过客户端(Javascript)与服务器端进行交互的方法很少:
1. XMLHttpRequest [回调 [ Web服务调用 [ PageMethod [

All you want is to know how to talk to server from client side (Javascript).

There are few ways to interact with server side through client side(Javascript):
1. XMLHttpRequest[^]
2. Callback[^]
3. WebService call[^]
4. PageMethod[^]

您必须为此使用ajax.
U可以使用文本框Onblur事件来调用javascript.
有关更多信息，请参见此链接

http://dotnetspidor.blogspot.com/2009/03/check-username-availability- using.html [ ^ ]

U have to use ajax for that.
U can use textbox Onblur event to call javascript.
For more info see this link

http://dotnetspidor.blogspot.com/2009/03/check-username-availability-using.html[^]

也请检查此
检查用户名可用性 [

also check this
Checking Username Availability[^]

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