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Understanding Master Pages in ASP.NET: Benefits and Syntax Overview

This outline explores the concept of Master Pages in ASP.NET, highlighting their syntax, benefits, and how to create a template for site layout. By defining the layout in one place, developers can streamline the creation of web pages, eliminating code duplication. The use of placeholders for page-specific content allows individual pages to inherit from the master layout seamlessly. The guide includes examples, including the use of nesting and programmatic access to master pages, ultimately demonstrating how Master Pages enhance web development efficiency.

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Understanding Master Pages in ASP.NET: Benefits and Syntax Overview

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  1. Master PagesMacDonald Ch. 13 MIS 324 Professor Sandvig

  2. Outline • Why Master Pages? • Syntax • Example

  3. Benefits of Master Pages • Create a template for site layout • Defined in one place, rather than each page • Include “Placeholders” for page-specific content • Individual pages inherit layout from master • Eliminates last place where code was duplicated

  4. Syntax • Create master page • .master extension • Directive: <%@ master %> • Include common content • headers, footers, menus, layout, etc. • Include placeholder controls for page content

  5. Syntax • .aspx pages • Reference master page in page directive • Include “content” controls • Provides content • Map to placeholders in .master page

  6. VS Support

  7. VS Support

  8. Syntax • Default Content • Include in master page • Used when .aspx page does not provide content. • Example: • Florist: default.aspx • Source: masterPage.master.txt, daisy.aspx.txt

  9. MasterPages: Other Features • Nesting • Sub-masters inherit from .master • Add more placeholders • Programmatic access to master page • Change items from .aspx page • meta tags • style sheet … • Navigation Controls • Extensive integration with MasterPages • Page titles, formatting, etc. • Example: ISC web site

  10. Summary • Master Pages • Handy new feature • Easy to use

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