The page indicating that the identity is used to determine what special settings do you need to do when you process the ASPX file? Its syntax is: <% @ Directive Attribute = value%> For example: <% import namespace = "system.data"%> Note between the attributes Need a space, there is no space between "=". ASP.NET's Web Forms now contains the following 7 identities: @ page, @ Control, @ Import, @ registe, @ askEMBLY, @ outputcache @ page identity Our common properties is Language such as <% @ page language = "vb" %> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Reasonable place, although just warning, it is still displayed as an error. Specific application visible: two solutions in the ASP.NET Chinese display @ Control is not in the ASPX file, but in the ASCX file, that is, the support of the subscription, only one @ @ @ @ @ 文件Control Identification @ Import is a identifier we may most often use. When we use some special ASPX features, in order to tell the compiler, we need to use this logo, and the commonly used identity I have already speaking in the previous article. Over, if you don't use @ Import We default, you can already use some namespace system system.collectionysystem.iosystem.Websystem.Web.uisystem.web.ui.htmlControlssystem.web.ui.WebControls @ register is when When we call our sub-definition component in the ASPX file, we use this PageLet, through this ID, we can use our own namespace @ askEMBLY to use our own namespace @ askEMBLY to compile the ASPX file in this ASPX file. What additional compilers need to be used, the usage is as follows: <% @ askEMBLY SRC = "DOCNAME"%> SRC points to the suffix CS or VB file, which will enable the Class in these files to be in the current page The length of the @ OutputCache .aspx file is reserved on the server (connection ...) <% @ OutputCache duration = "1000"%> The Cache retention time defined here is 1000 second @ WebService references a WebService class. The usage is as follows: <% @ WebService language = "language" class = "classname"%> Web Service Type Marshalling
