"System. web. MVC. htmlhelper does not contain the definition of "routelink" and cannot find the acceptable type as "system. web. MVC. the Extension Method of the first parameter of htmlhelper "route

We often encounter the following error when customizing the demohtmlhelper class.

Error 13 "system. web. MVC. htmlhelper does not contain the definition of "routelink" and cannot find the acceptable type as "system. web. MVC. the Extension Method "routelink" of the first parameter of htmlhelper (whether the using command orProgramSet Reference ?) C: \ Documents ents and Settings \ Administrator \ My Documents ents \ Visual Studio 2008 \ projects \ XXXX \ helper \ helpers. CS 49 54 xxxx

Because the routelink () method is implemented in the linkextensions of the static extension class, this method is not available in the htmlhelper class; so if you use htmlhelper in the demohtmlhelper class of the custom extension. the routelink () method fails.

Of course, the solution is also very simple:

First, introduceUsing system. Web. MVC. html;Assembly.