You can specify an explicit resource expression or an implicit resource expression for a control, but not both. The following declarative syntax on a Button control causes a parser error:. In this example, an implicit local resource file one that matches the current page name is specified as well as an explicit resource file that is named WebResources. To prevent a parser error for this control, remove one of the resource expressions.
If a page includes static text, you can use ASP. NET localization by including it in a Localize control, and then using explicit localization to set the static text. The Localize control renders no markup; its only function is to act as a placeholder for localized text. The Localize control can be edited in Design view, not only in the property grid. NET treats the Localize control as a Literal control. For example, your page might include the following code:. This example has a text box that accepts user input, which is a potential security threat.
By default, ASP. For more information, see Script Exploits Overview. In templated controls, such as the DataList , GridView , and Wizard controls, you localize template style properties by accessing the properties through the parent control's implicit resource expression. You cannot use an implicit resource expression on the template itself. To localize values for a template property, use the meta attribute and a resource key for the control that the template belongs to.
Then use either the Property. Subproperty syntax or the Property-Subproperty syntax in the resource file. For example, the following declarative syntax is valid for a Wizard control:. You can use an explicit resource expression for the NavigationStyle property of the Wizard control in the previous example. The explicit resource expression omits the Class name so that resources from a local resource file are used.
For more information about templated server controls, see ASP. When a page runs, ASP. NET selects the version of the resource file that most closely matches the current UICulture setting for the page. If there is no match, ASP. NET uses resource fallback to obtain a resource.
For example, if you are running the Default. NET uses the compiled version of the local resource file Default. NET can set the UICulture and Culture properties for the page to the language and culture values that are passed by the browser. Alternatively, you can set the UICulture and Culture properties explicitly, either declaratively or in code. You can also set the values declaratively in Web. You should not rely exclusively on browser settings to set language and culture information, because users can be using a browser on a computer other than their own.
Also, browsers frequently communicate only language information without a specific culture setting. In that case, the server has to deduce a specific culture for data formatting. A good strategy is to let users select a language explicitly. Besides setting resource values in markup with resource expressions, you can retrieve resource values programmatically.
We can dynamically load JS files when we need them. And also consider about your hardware devices which deploy your site. I'm frustrated rate now, fear I have to reprogram my entire website in PHP. I spent about 9 months developing the site in. The content you requested has been removed.
Ask a question. NET Core Blazor component virtualization. Most Razor components don't require aggressive optimization efforts because most components don't repeat in the UI and don't rerender at high frequency. For example, routable components with an page directive and components used to render high-level pieces of the UI, such as dialogs or forms, most likely appear only one at a time and only rerender in response to a user gesture.
These components don't usually create high rendering workload, so you can freely use any combination of framework features without much concern about rendering performance. However, there are common scenarios where components are repeated at scale and often result in poor UI performance:.
If modelling each element, cell, or data point as a separate component instance, there are often so many of them that their rendering performance becomes critical.
This section provides advice on making such components lightweight so that the UI remains fast and responsive. Each component is a separate island that can render independently of its parents and children. By choosing how to split the UI into a hierarchy of components, you are taking control over the granularity of UI rendering.
This can result in either good or poor performance. By splitting the UI into separate components, you can have smaller portions of the UI rerender when events occur. In a table with many rows that have a button in each row, you may be able to have only that single row rerender by using a child component instead of the whole page or table. However, each component requires additional memory and CPU overhead to deal with its independent state and rendering lifecycle.
In a test performed by the ASP. NET Core product unit engineers, a rendering overhead of around 0. The test app rendered a simple component that accepts three parameters. Internally, the overhead is largely due to retrieving per-component state from dictionaries and passing and receiving parameters.
By multiplication, you can see that adding 2, extra component instances would add 0. It's possible to make components more lightweight so that you can have more of them. However, a more powerful technique is often to avoid having so many components to render. The following sections describe two approaches that you can take. The preceding example performs well if thousands of messages aren't shown at once.
To show thousands of messages at once, consider not factoring out the separate ChatMessageDisplay component.
Instead, inline the child component into the parent. The following approach avoids the per-component overhead of rendering so many child components at the cost of losing the ability to rerender each child component's markup independently:. You might be factoring out child components purely as a way of reusing rendering logic.
If that's the case, you can create reusable rendering logic without implementing additional components. In any component's code block, define a RenderFragment. Render the fragment from any location as many times as needed:. As demonstrated in the preceding example, components can emit markup from code within their code blocks and outside of them.
Assignment to a RenderFragment delegate is only supported in Razor component files. To make RenderTreeBuilder code reusable across multiple components, declare the RenderFragment delegate as public and static :. SayHello in the preceding example can be invoked from an unrelated component. This technique is useful for building libraries of reusable markup snippets that render without per-component overhead. RenderFragment delegates can also accept parameters. The following component passes the message message to the RenderFragment delegate:.
The preceding approach provides the benefit of reusing rendering logic without per-component overhead. However, it doesn't have the benefit of being able to refresh its subtree of the UI independently, nor does it have the ability to skip rendering that subtree of the UI when its parent renders because there's no component boundary. For a non-static field, method, or property that can't be referenced by a field initializer, such as TitleTemplate in the following example, use a property instead of a field in the RenderFragment delegate:.
If a component repeats extremely often, for example, hundreds or thousands of times, the overhead of passing and receiving each parameter builds up.
It's rare that too many parameters severely restricts performance, but it can be a factor. For a TableCell component that renders 1, times within a grid, each extra parameter passed to the component could add around 15 ms to the total rendering cost.
If each cell accepted 10 parameters, parameter passing would take around ms per component for a total rendering cost of , ms seconds and cause a UI rendering lag.
To reduce parameter load, bundle multiple parameters in a custom class. For example, a table cell component might accept a common object. In the following example, Data is different for every cell, but Options is common across all cell instances:.
However, consider that it might be an improvement not to have a table cell component, as shown in the preceding example, and instead inline its logic into the parent component. When multiple approaches are available for improving performance, benchmarking the approaches is usually required to determine which approach yields the best results.
For more information on generic type parameters typeparam , see the following resources:. The CascadingValue component has an optional IsFixed parameter:. The Multilingual ASP. Net website is now ready and we will now test it to make sure it works in the following two cases. Loading the Default User Language from Browser. In order to test whether the Multilingual ASP.
Net website detects and loads the default user language, you will need open Internet Options window from the Tools menu of the Internet Explorer browser and then click on Languages button and finally add and make French language as default. Now run the website and it will display the contents in French Language and also the DropDownList will display the French Language as selected.
Switching between the Languages using DropDownList. When a language is selected from the DropDownList, the content is displayed for the selected language. View Demo. Related Articles. Add Comments. Thank you for the feedback. The comment is now awaiting moderation. You will be notified via email when the author replies to your comment. Please select a comment to reply. You can add your comment about this article using the form below. Make sure you provide a valid email address else you won't be notified when the author replies to your comment Please note that all comments are moderated and will be deleted if they are Not relavant to the article Spam Advertising campaigns or links to other sites Abusive content.
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