Interpretation and usage of several similar data binding tags in Asp. Net

Several similar markup symbols in ASP. Net: <% =... %> <% #... %> <% @ %> explanation and usage

 

A: <% #... %>: it is executed when the DataBind () method of the bound control is executed and used for data binding.

 

 

 

For example: <% # Container. DataItem (tit) %>

 

<% = %>: Called during program execution. The background variable value can be displayed, for example :*. in ASPx: <% = aaa %> *. in cs: protected string aaa = Name;

 

<%>: The Inline code block can be found in the page file *. ASPx or *. the following background code is embedded in the ascx file: <% for (int I = 0; I <100; I ++) {Reaponse. write (I. toString () ;}%>

 

<% @ %> The namespace for code Import on the *. ASPx page, for example, <% @ Import namespace = System. Data %>

 

 

<% = %> Can appear anywhere on the page, that is, output, equivalent to <% Response. write () %>, such as <% = DateTime. now. toString () %>
<% # %> It is the binding of data output in the template columns such as GridView, DataList, and Repeater, for example, <% # Eval ("field name") %>
<% $ %> Used to read configuration information in web. config, as shown in <% $ ConnectionStrings: ConnStr %>