Load partial view through controller on Search button click - asp.net-core

Question

I am working on an ASP.NET Core 2.1 MVC app using razor. I have searchQuery.cshtml and a (individually working perfectly) viewQuery.cshtml pages. In my searchQuery page, I let user enter queryId and on clicking "Search" button I want to run the action of ViewQuery that displays the results in viewQuery.cshtml and show the viewQuery below the search button area.
I am not good working with Ajax or so. On Search btn click, I call the viewQuery Get action thru ajax. In the button click, I pass the entered queryId of type int. But, when I load searchQuery page, it throws null exception for passing the queryId. I searched few hous, but didn't get any solution.
searchQuery.cshtml UPDATED
<div>
<div class="col-md-6">
<dl class="dl-horizontal">
<dt>
#Html.DisplayNameFor(model => model.QueryId)
</dt>
<dd>
<input asp-for="QueryId" class="form-control" />
</dd>
</dl>
</div>
<input type="submit" value="Show" />
<!-- CHANGE IN CALL -->
Search
</div>
<div class="modal fade" id="myModal">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
×
<h3 class="modal-title">Query Answer</h3>
</div>
<div class="modal-body" id="myModalBodyDiv">
</div>
<div class="modal-footer">
Ok
</div>
</div>
</div>
</div>
<script>
function ShowResult() {
// Retrieve queryId
var queryId = $("#QueryId").val();
// DisplayS PROPERLY
alert("Entered ID " + queryId);
// TRIED '/query/viewQuery' ALSO
$.ajax({
type: 'GET',
url: '../query/viewQuery',
data: { queryId: queryId },
success: function (response) {
alert(response); // **DISPLAYS [Object: object]**
$("#myModalBodyDiv").html(response);
$('#myModal').modal("show");
}, error: function (response) {
alert("Error: " + response);
}
});
}
</script>
My ViewQuery action in controller UPDATED
[Route("[controller]/viewQuery/{queryId:int}")]
public async Task<IActionResult> ViewQuery(int queryId)
{
// Retrieve Data from api using HttpClient
....
return PartialView("ViewQuery", qVM); // PartialView(qVM); //View(qVM);
}
Search Query Action UPDATED
[Route("searchQuery")] // customer/searchQuery
public IActionResult SearchQuery()
{
return View();
}
Can anyone please help me how do I achieve my goal. Simple - a text box were user enters queryId. A button on click, want to pass the entered queryId, call a GET action on controller and get the response. Finally show the response below the search button. I was just trying with the above modal dialog, I prefer text and not dialog.

Answer 1

Try & isolate the issue.
Instead of using model.QueryId in the searchQuery.cshtml, simply hardcode any reference to "modelid" - that way at least you are eliminating the possibility that Model is null on that page. Then instead of onclick="ShowResult(#Model.QueryId)"> , hard code some known id instead of #Model.QueryId. Then debug to see if your ViewQuery action method id hit. If the method is hit, then you can take it from there.
Also, I noticed that your jquery calls may need to be modified:
Instead of: $('myModalBodyDiv').html(response); it should probably be $('#myModalBodyDiv').html(response); (the "#" is missing ..) - same for $('myModal').

Answer 2

You can use Partial Pages(ViewQuery page) , in your searchQuery page , you could use Ajax to call server side action with parameter ID . On server side , you can query the database with ID and return PartialView with models :
[HttpPost]
public IActionResult Students (StudentFilter filters)
{
List students = Student.GetStudents(filters);
return PartialView("_Students", students);
}
Then in success callback function of Ajax , you can load the html of partial view to related area in page using jQuery :
success: function (result) {
$("#searchResultsGrid").html(result);
}
You can click here and here for code sample if using MVC template . And here is code sample if using Razor Pages .