Brief description of the role of the @ import command in the *. aspx File

[Test Site]
@ Import command.
[Occurrence frequency]
★★★★☆
[Answer]
The @ import command can declare the namespace to be used on the current page. If you need multiple namespaces, you only need to add multiple @ import commands.
[Analysis]
This topic examines whether the user has imported a namespace when writing an ASP. NET page. This command can be written in *. aspx file, user control file, master page file, or global. asax file. The compiling method is as follows: Code.
<% @ Import namespace = "system. Data" %>
The above code imports the "system. Data" namespace. If you import the namespace in the *. CS file, you should use using. Not all namespaces need to be explicitly imported ,*. the ASPX page automatically uses some important namespaces, such as the "System" namespace and "system. text and all web-centered namespaces.