MVC which submit button has been pressed

Question

I have two buttons on my MVC form    lt input name  submit  type  submit  id  submit  value  Save    gt   lt input name  process  type  submit  id  process  value  Process    gt    From my Controller action how do I know which one have been pressed

User · Answer

Can you not find out using Request Form Collection  If process is clicked the request form  process   will not be empty

User · Answer

this is a better answer  so we can have both text and value for a button   http   weblogs asp net dfindley archive 2009 05 31 asp-net-mvc-multiple-buttons-in-the-same-form aspx     lt  p gt   lt button name  button  value  register  gt Register lt  button gt   lt button name  button  value  cancel  gt Cancel lt  button gt   lt  p gt    and the controller   public ActionResult Register string button  string userName  string email  string password  string confirmPassword    if  button     cancel       return RedirectToAction  Index    Home          in short its a SUBMIT button but you choose the name using the name attribute  its even more powerful because your not obligated to the name submit or button in the controller method parameters  you can call it as you like

User · Answer

To make it easier I will say you can change your buttons to the following    lt input name  btnSubmit  type  submit  value  Save    gt   lt input name  btnProcess  type  submit  value  Process    gt    Your controller   public ActionResult Create string btnSubmit  string btnProcess        if btnSubmit    null            do something for the Button btnSubmit     else            do something for the Button btnProcess

User · Answer

lt input name  submit  type  submit  id  submit  value  Save    gt   lt input name  process  type  submit  id  process  value  Process    gt    And in your controller action   public ActionResult SomeAction string submit        if   string IsNullOrEmpty submit                    Save was pressed           else                  Process was pressed

User · Answer

Here s a really nice and simple way of doing it with really easy to follow instructions using a custom MultiButtonAttribute   http   blog maartenballiauw be post 2009 11 26 Supporting-multiple-submit-buttons-on-an-ASPNET-MVC-view aspx  To summarise  make your submit buttons like this    lt input type  submit  value  Cancel  name  action    gt   lt input type  submit  value  Create  name  action    gt     Your actions like this    HttpPost   MultiButton MatchFormKey  action   MatchFormValue  Cancel    public ActionResult Cancel         return Content  Cancel clicked        HttpPost   MultiButton MatchFormKey    action   MatchFormValue    Create    public ActionResult Create Person person        return Content  Create clicked         And create this class    AttributeUsage AttributeTargets Method  AllowMultiple   false  Inherited   true   public class MultiButtonAttribute   ActionNameSelectorAttribute       public string MatchFormKey   get  set        public string MatchFormValue   get  set         public override bool IsValidName ControllerContext controllerContext  string actionName  MethodInfo methodInfo                return controllerContext HttpContext Request MatchFormKey     null  amp  amp              controllerContext HttpContext Request MatchFormKey     MatchFormValue

User · Answer

Name both your submit buttons the same   lt input name  submit  type  submit  id  submit  value  Save    gt   lt input name  submit  type  submit  id  process  value  Process    gt    Then in your controller get the value of submit  Only the button clicked will pass its value   public ActionResult Index string submit        Response Write submit       return View        You can of course assess that value to perform different operations with a switch block   public ActionResult Index string submit        switch  submit                case  Save                  Do something             break          case  Process                  Do something             break          default              throw new Exception                break             return View

User · Answer

Give the name to both of the buttons and Get the check the value from form     lt div gt      lt input name  submitButton  type  submit  value  Register    gt   lt  div gt    lt div gt      lt input name  cancelButton  type  submit  value  Cancel    gt   lt  div gt    On controller side     public ActionResult Save FormCollection form     if  this httpContext Request Form  cancelButton     null           return to the action      else if this httpContext Request Form  submitButton     null           save the oprtation and retrun to the action

User · Answer

In Core 2 2 Razor pages this syntax works        lt button type  submit  name  Submit  gt Save lt  button gt       lt button type  submit  name  Cancel  gt Cancel lt  button gt  public async Task lt IActionResult gt  OnPostAsync         if   ModelState IsValid          return Page        var sub   Request Form  Submit        var can   Request Form  Cancel        if  sub Count  gt  0

User · Answer

Buttons  lt input name  submit  type  submit  id  submit  value  Save    gt   lt input name  process  type  submit  id  process  value  Process    gt      Controller  HttpPost  public ActionResult index FormCollection collection        string submitType    unknown        if collection  submit      null                submitType    submit             else if  collection  process      null                submitType    process               End of the index method

User · Answer

This post is not going to answer to Coppermill  because he have been answered long time ago  My post will be helpful for who will seeking for solution like this  First of all   I have to say   WDuffy s solution is totally correct  and it works fine  but my solution  not actually mine  will be used in other elements and it makes the presentation layer more independent from controller  because your controller depend on  value  which is used for showing label of the button  this feature is important for other languages     Here is my solution  give them different names    lt input type  submit  name  buttonSave  value  Save   gt   lt input type  submit  name  buttonProcess  value  Process   gt   lt input type  submit  name  buttonCancel  value  Cancel   gt    And you must specify the names of buttons as arguments in the action like below   public ActionResult Register string buttonSave  string buttonProcess  string buttonCancel        if  buttonSave   null                  save is pressed           if  buttonProcess   null                  Process is pressed           if  buttonCancel   null                  Cancel is pressed           when user submits the page using one of the buttons  only one of the arguments will have value  I guess this will be helpful for others   Update  This answer is quite old and I actually reconsider my opinion   maybe above solution is good for situation which passing parameter to model s properties  don t bother yourselves and take best solution for your project

User · Answer

you can identify your button from there name tag like below  You need to check like this in you controller  if  Request Form  submit      null      Write your code here   else if  Request Form  process      null      Write your code here

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