Ajax.ActionLink publish the whole model in terms of?

Question

I have a view that is strongly typed in a ViewModel. Is it possible to transfer all the data from the model in the view, back to the controller action? Something like that?

@Ajax.ActionLink("(Export to Excel)", "ExportCsv", "SurveyResponse", new { ResultsViewModel = Model }, new AjaxOptions {HttpMethod = "POST"}) 

And then collect data from ResultsViewModel as a parameter in another controller

 public ActionResult ExportCsv(ResultsViewModel resultsviewmodel) { } 

Answer 1

No, you cannot pass an entire view model like this in an action reference. You can only pass the id this model, and then retrieve the actual model using this id , no matter where you originally retrieved it:

 @Ajax.ActionLink( "(Export to Excel)", "ExportCsv", "SurveyResponse", new { id = Model.Id }, new AjaxOptions { HttpMethod = "POST" } ) 

Alternatively, you can serialize the model as a javascript literal and then send it as JSON data with an AJAX request:

 @Html.ActionLink( "(Export to Excel)", "ExportCsv", "SurveyResponse", null, new { @class = "exportCsv" } ) <script type="text/javascript"> $('.exportCsv').click(function() { var model = @Html.Raw(Json.Encode(Model)); $.ajax({ url: this.href, type: 'POST', contentType: 'application/json; charset=utf-8', data: JSON.stringify(model), success: function(result) { } }); return false; }); </script> 

Answer 2

Managed to do below work,

 @Ajax.ActionLink("(Export to Excel)", "ExportCsv", "SurveyResponse", new { Model.F1, Model.F2, Model.OtherFields }, new AjaxOptions {HttpMethod = "POST"}) 

controller

 [HttpPost] public ActionResult ExportCsv(ResultsViewModel resultsviewmodel) { } 

This is an http message, but the data is not in the "form data", it is encoded in the request URL (but not http-get).

It looks like MVC automatically converts individual fields into one model.

URL has length restrictions, a large model may fail.

Answer 3

Try sending the model identifier to the controller and get the json result:

 @Ajax.ActionLink("(Export to Excel)", "ExportCsv", "SurveyResponse", new { id = Model.Id }, new AjaxOptions {HttpMethod = "POST"}) 

And in the controller you will have:

 [HttpGet] public ActionResult ExportCsv(int id) { //Here get the whole model from your repository for example: var model=GetModelByModelId(id); //And do everything you want with your model. return Json(model,JsonRequestBehavior.AllowGet); } 

Answer 4

I did the following. This somehow hits the HTTP POST point in my oppionion. But hey, he does his job.

My Ajax:

 @Ajax.ActionLink("Delete", "RemoveSubjectFromCategory","Categories", new { SubjectId = item.Id, CategoryId = Model.Id }, new AjaxOptions {HttpMethod = "GET"}) 

My controller:

 [HttpGet] public async Task<ActionResult> RemoveSubjectFromCategory(RemoveSubjectFromCategoryModel model) {} 

My binding model:

 public class RemoveSubjectFromCategoryModel { [Required] public int SubjectId { get; set; } [Required] public int CategoryId { get; set; } }