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where we use <%@ %> <%= %> <%# %> etc.
what else asp tags can be added in asp.net web pages?
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Embedded code blocks are supported in ASP.NET Web pages primarily to preserve backward compatibility with older ASP technology. In general, using embedded code blocks for complex programming logic is not a best practice, because when the code is mixed on the page with markup, it can be difficult to debug and maintain.
In C#, a code block is a group of lines of code between curly braces {} . { //Everything between { and } is part of this code block. } Both selection statement keywords and loops work with code blocks, though in different ways.
The runat="server" tag in ASP.NET allows the ability to convert/treat most any HTML element as a server-side control that you can manipulate via code at generation time. Some controls have explicit implementations, others simply revert to a generic control implementation.
A directive controls how an ASP.NET page is compiled. The beginning of a directive is marked with the characters <%@ and the end of a directive is marked with the characters %>. A directive can appear anywhere within a page. By convention, however, a directive typically appears at the top of an ASP.NET page.
<%%> is short hand for:
<script runat="server">
</script>
Anyting inside the <% and %> is server side code.
The other variants are also shortcuts:
<%@%> is a page directrive<%=%> is short for Response.Write
<%:%> is short for Response.Write, adding html encoding (introduced with .NET 4.0)<%#%> is a binding expressionThis page is a good reference to all these.
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