Atlas学习手记(6):使用Atlas UpdateProgress控件
在页面上执行较长时间的操作时,如果能够给用户提供一个类似于浏览器状态栏那样的进度条,将会使界面用户界面更加友好。在Atlas中,为我们提供的UpdateProgress控件可以轻松的实现这些。
主要内容
1.UpdateProgress控件介绍
2.完整的示例
一.UpdateProgress控件介绍
在页面上执行较长时间的操作时,如果能够给用户提供一个类似于浏览器状态栏那样的进度条,将会使界面用户界面更加友好。相信大家都见到过如下这样的界面:
在Atlas中,为我们提供的UpdateProgress控件可以轻松的实现类似于这样的进度条,虽然它并不是反映真实的进度,却可以使我们用户界面更加友好。一个简单的UpdateProgress控件示例代码:
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UpdateProgress控件并没有什么属性需要去设置,我们唯一要做的就是设置ProgressTemplate,即进度条在页面上显示的样式,可以是图片,文本等,这一点类似于我们前面说过的ErrorTemplate。
二.完整的示例
UpdateProgress控件的使用相当简单,下面看一个例子,在该示例中,我们在更新一段文本时执行长时间的操作。还是先添加ScriptManager控件:
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在添加一个UpdatePanel,用来更新文本:
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现在添加UpdateProgress控件,设置ProgressTemplate用<div>来实现:
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添加一个按钮,在它的事件中更新上面的文本:
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至此整个示例就完成了,编译运行,看一下效果:
单击“更新”按钮
更新完成后:
UpdateProgress控件使用需要的几点:
1.UpdateProgress控件并不是为某一个控件的处理而添加的,它是一个全局的控件,对整个页面都有效,所以在页面只能有一个且只能添加一个UpdateProgress控件。所有涉及到延时的操作都会由UpdateProgress控件来处理。
2.UpdateProgress控件的Template中有一个ID为abortButton的Button控件,我们可以提供一个服务器端Button或LinkButton控件,并指定ID为abortButton,以使用户可以取消当前的操作。示例代码如下:
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