@load"
From Documentation
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=Syntax= | =Syntax= | ||
| − | <code> @load(</code> ''[EL-expression], [conditionKeyword]=[EvaluateOnce EL-expression] '' <code>) </code> | + | <code>@load(</code> ''[EL-expression], [conditionKeyword]=[EvaluateOnce EL-expression] '' <code>)</code> |
= Description = | = Description = | ||
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'''Purpose:''' Restrict binder to load data from ViewModel only, not save back | '''Purpose:''' Restrict binder to load data from ViewModel only, not save back | ||
| − | For some attributes that don't save data back to the ViewModel like listbox's model or label's value, you can also write <code> @bind </code> or <code> @load </code>. | + | For some attributes that don't save data back to the ViewModel like listbox's model or label's value, you can also write <code>@bind</code> or <code>@load</code>. |
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;''[EvaluateOnce EL-expression]'' | ;''[EvaluateOnce EL-expression]'' | ||
: The evaluation result must be one or more command name. | : The evaluation result must be one or more command name. | ||
| − | : Command name must correspond to the name specified in Java annotation <code> @Command </code> in a ViewModel. | + | : Command name must correspond to the name specified in Java annotation <code>@Command</code> in a ViewModel. |
= Example = | = Example = | ||
Revision as of 15:05, 12 January 2022
This article is out of date, please refer to zk-mvvm-book/8.0/syntax/data_binding/load for more up to date information.
Syntax
@load( [EL-expression], [conditionKeyword]=[EvaluateOnce EL-expression] )
Description
Target Attribute: any (except viewModel, validationMessages)
Purpose: Restrict binder to load data from ViewModel only, not save back
For some attributes that don't save data back to the ViewModel like listbox's model or label's value, you can also write @bind or @load.
- [conditionKeyword]=[EvaluateOnce EL-expression]
- This expression is optional unless you want to save or load upon a command.
- [conditionKeyword]
- It could be one of [ before | after ]
- [EvaluateOnce EL-expression]
- The evaluation result must be one or more command name.
- Command name must correspond to the name specified in Java annotation
@Commandin a ViewModel.
Example
<label value="@load(vm.user.id)" />
<label value="@load(vm.user.permission, after='showPermission')" />
<label value="@load(vm.user.permission, after={'showPermission', 'showAll'})" />
<label value="@load(vm.user.action, before='process')" />
Version History
| Version | Date | Content |
|---|---|---|
| 6.0.0 | February 2012 | The MVVM was introduced. |