Using Panel or PlaceHolder

Question

What is the difference between and in ASP.NET?

When should you use one over the other?

Answer 1

As mentioned in other answers, the Panel generates a

in HTML, while the PlaceHolder does not. But there are a lot more reasons why you could choose either one.

Why a PlaceHolder?

Since it generates no tag of it's own you can use it safely inside other element that cannot contain a

, for example:

    

        
Row 1
    
    

You can also use a PlaceHolder to control the Visibility of a group of Controls without wrapping it in a

Why a Panel

It generates it's own

and can also be used to wrap a group of Contols. But a Panel has a lot more properties that can be useful to format it's content:

    Red text on a green background with a black dotted border.

But the most useful feature is the DefaultButton property. When the ID matches a Button in the Panel it will trigger a Form Post with Validation when enter is pressed inside a TextBox. Now a user can submit the Form without pressing the Button.

Try the above snippet by pressing enter inside TextBox1

0 讨论(0)

查看其它5个回答

发布评论:

提交评论

---

•  加载中...