ASP.NET AJAX入门系列(11):在多个UpdatePanle中使用Timer控件
Posted on 2007-06-01 09:37 yinix 阅读(144) 评论(0) 编辑 收藏 举报本文将使用Timer控件更新两个UpdatePanel控件,Timer控件将放在UpdatePanel控件的外面,并将它配置为UpdatePanel的触发器,翻译自官方文档。
主要内容
在多个UpdatePanel中使用Timer控件
1.添加一个新页面并切换到设计视图。
2.如果页面没有包含ScriptManager控件,在工具箱中的AJAX Extensions标签下双击ScriptManager控件添加到页面中。
3.双击Timer控件添加到Web页面中。Timer控件可以作为UpdatePanel的触发器不管它是否在UpdatePanel中。
4.双击UpdatePanel控件添加一个Panel到页面中,并设置它的UpdateMode属性值为Conditional。
5.再次双击UpdatePanel控件添加第二个Panel到页面中,并设置它的UpdateMode属性值为Conditional。
6.在UpdatePanel1中单击,并在工具箱中Standard标签下双击Label控件添加到UpdatePanel1中。
7.设置Label控件的Text属性值为“UpdatePanel1 not refreshed yet”。
8.添加Label控件到UpdatePanel2。
9.设置第二个Label控件的Text属性值为“UpdatePanel2 not refreshed yet”。
10.设置Interval属性为10000。Interval属性的单位是毫秒,所以我们设置为10000,相当于10秒钟刷新一次。
11.双击Timer控件添加Tick事件处理,在事件处理中设置Label1和Label2的Text属性值,代码如下。
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12.在UpdatePanel1和UpdatePanel2中添加Timer控件作为AsyncPostBackTrigger,代码如下:
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全部完成后ASPX页面代码如下:
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13.保存并按Ctrl + F5运行。
14.等待10秒钟后两个UpdatePanel都刷新后,Label中的文本都变成了当前时间。