Net4.0 detects potentially dangerous request. form from the client

"A potentially dangerous request. form value was detected the client ".

In the ages earlier than 4.0, A validaterequest = 'false' or. in config, you can identify it. However, after such correction in 4.0, it is invalid and must be in the web.

If the httpruntime node does not exist, add it to the <system. Web> node.

That is to say, under the <system. Web> node, there are these two nodes:

 
<System. Web>
 

 
<Pages Validaterequest= "False"> </Pages>
 

<Httpruntime Requestvalidationmode= "2.0"> </Httpruntime>
 

 
</System. Web>
 

Added on controller action[Validateinput (false)]Features

Test successful