Implement HTTP-GET
Delete action
Method Now, add the delete function to the dinnerscontroller class. When a user accesses the/dinners/delete/[ID] URL, the delete action method is accessed. The implementation of this method is as follows: // // Http get:/dinners/delete/1 Public ActionresultDelete (IntID) { DinnerDinner = dinnerrepository. getdinner (ID ); If(Dinner =Null) ReturnView ("Notfound"); Else ReturnView (dinner ); } The action method tries to retrieve the dinner object to be deleted. If a dinner object exists, the view of the dinner object is displayed. If the object does not exist (or has been deleted), a notfound view is returned. We have created this view before. The methods for creating the delete view are not repeated, as shown in:
After you click the Add button, Visual Studio automatically creates a new Delete. aspx view template file under the \ views \ dinners directory. We will modify the file to confirm deletion. Code As follows: < ASP : Content ID= "Title" Contentplaceholderid= "Titlecontent" Runat= "Server"> Confirm deletion:<%=Html. encode (model. Title)%> </ ASP : Content > < ASP : Content ID= "Main" Contentplaceholderid= "Maincontent" Runat= "Server"> <H2> Are you sure you want to delete it?</H2> <Div> <P> Please confirm whether to cancel the banquet:<I> <%=Html. encode (model. Title)%></I> </P> </Div> <% Using(Html. beginform ()) {%> <Input Name= "Confirmbutton" Type= "Submit" Value=" Delete" /> <%}%> </ ASP : Content > The code above shows the dinner to be deleted and outputs the <form> element. When you click the delete button, the form is submitted to the/dinners/delete/[ID] address. Run the application Program , Access the/dinners/delete/[ID] URL and ID identifies a valid dinner object. The effect is shown in the browser as follows:
Implement HTTP-POST Delete action
Method The code for implementing the http post action of the delete action method is as follows: // // Http post:/dinners/delete/2 [ Acceptverbs(Httpverbs. Post)] Public ActionresultDelete (IntID,StringConfirmbutton) { DinnerDinner = dinnerrepository. getdinner (ID ); If(Dinner =Null) ReturnView ("Notfound"); Dinnerrepository. Delete (dinner ); Dinnerrepository. Save (); ReturnView ("Deleted"); } The HTTP-POST version of the delete action method first retrieves the dinner object to be deleted. If not found (may have been deleted), The notfound view template is displayed. If yes, It is deleted from dinnerrepository and the deleted view template is displayed. Now you need to create a deleted view template. In the add view dialog box, you do not need to select a strong model type, as shown in:
Run the sample program again to access the/dinners/delete/[ID] URL address. In the confirm deletion window, click Delete, perform the HTTP-POST operation to the/dinners/delete/[ID] address, trigger the post version of the delete method in dinnerscontroller, delete the specified dinner record from the database, and display the deleted view template:
Click the "show upcoming banquet list" link and return to the/dinners address. The deleted dinnerd record does not exist.
