MVC Project

Question

I am learning MVC with VS2019 and letting VS create the code. I have a Function Create in the controller

    <HttpPost()>
    <ValidateAntiForgeryToken()>
    Function Create(<Bind(Include:="Id,CreatedBy_Id,CreatedBy_LogicalName,CreatedBy_Name,CreatedOn,new_licenceId_Id")> ByVal new_clientbankdata As new_clientbankdata) As ActionResult
        If ModelState.IsValid Then
            db.new_clientbankdata.Add(new_clientbankdata)
            db.SaveChanges()
            Return RedirectToAction("Index")
        End If
        Return View(new_clientbankdata)
    End Function

How can I pass a value for new_licenceId_Id without it being on the Create.vbhtml form. The new_licenceId_id is a session variable Session("LicenceID")

Answer 1

You should learn about the various models like a viewmodel that is strong typed to a given view.

https://deviq.com/terms/kinds-of-models

https://www.dotnettricks.com/learn/mvc/understanding-viewmodel-in-aspnet-mvc

hidden field in view for AuthorId that must be know when article is persisted to database

https://github.com/darnold924/PublishingCompany/blob/master/PublishingCompany/Models/ArticleVM.cs

Look at the logic on how the hiddenfield is used to hold the AuthorId that is needed for the Article that is being saved on a Create() in the ArticleController.

https://github.com/darnold924/PublishingCompany/blob/master/PublishingCompany/Views/Article/Create.cshtml

https://github.com/darnold924/PublishingCompany/blob/master/PublishingCompany/Controllers/ArticleController.cs

https://github.com/darnold924/PublishingCompany/blob/master/PublishingCompany/Models/ArticleDM.cs

HTH

Answer 2

You can pass as a hidden form element.

 @Html.HiddenFor(model => model.new_licenceId_Id)

you can also do as such

<input type="hidden" name="new_licenseId_Id" value="@Session("LicenseID")" />

You could also assign the value in the controller to a ViewBag and pass to the View that way

//controller code

ViewBag.LicenseID = Session("LicenseID").ToString()


//in the View
<input type="hidden" name="new_licenseId_Id" value="@ViewBag.LicenseID" />

Answer 3

If I'm honest, I am struggling. I am still not getting anything through for new_licenceid_id. I have chopped down the Bind statement only for this post. The record is being created but the Licence Is is empty

       ' GET: clientCRbankdata/Create  
        Function Create() As ActionResult  
            ViewBag.licenceID = "123456789"  
            Return View()  
        End Function  
  
        ' POST: clientCRbankdata/Create  
        <HttpPost()>  
        <ValidateAntiForgeryToken()>          
Function Create(<Bind(Include:="Id,CreatedBy_Id,CreatedBy_LogicalName,CreatedBy_Name,CreatedOn,new_licenceId_Id")> ByVal new_clientbankdata As new_clientbankdata) As ActionResult  
            If ModelState.IsValid Then  
                db.new_clientbankdata.Add(new_clientbankdata)  
                db.SaveChanges()  
                Return RedirectToAction("Index")  
            End If  
            Return View(new_clientbankdata)  
        End Function  

view

@ModelType Test.new_clientbankdata  
@Code  
    ViewData("Title") = "Create"  
    Layout = "~/Views/Shared/_Layout.vbhtml"  
End Code  
  
<h2>Create</h2>  
  
@Using (Html.BeginForm())   
    @Html.AntiForgeryToken()  
  
    @<div class="form-horizontal">  
    <h4>new_clientbankdata</h4>  
    <hr />  
    @Html.ValidationSummary(True, "", New With {.class = "text-danger"})  
    <input type="hidden" name="new_licenceId_Id" value="@ViewBag.licenceID"/>  
    
    <div class="form-group">  
        @Html.LabelFor(Function(model) model.new_ledgerref, htmlAttributes:=New With {.class = "control-label col-md-2"})  
        <div class="col-md-10">  
            @Html.EditorFor(Function(model) model.new_ledgerref, New With {.htmlAttributes = New With {.class = "form-control"}})  
            @Html.ValidationMessageFor(Function(model) model.new_ledgerref, "", New With {.class = "text-danger"})  
        </div>  
    </div>  
  
    <div class="form-group">  
        @Html.LabelFor(Function(model) model.new_sortcode, htmlAttributes:=New With {.class = "control-label col-md-2"})  
        <div class="col-md-10">  
            @Html.EditorFor(Function(model) model.new_sortcode, New With {.htmlAttributes = New With {.class = "form-control"}})  
            @Html.ValidationMessageFor(Function(model) model.new_sortcode, "", New With {.class = "text-danger"})  
        </div>  
    </div>  
    
    <div class="form-group">  
        @Html.LabelFor(Function(model) model.new_accountnumber, htmlAttributes:=New With {.class = "control-label col-md-2"})  
        <div class="col-md-10">  
            @Html.EditorFor(Function(model) model.new_accountnumber, New With {.htmlAttributes = New With {.class = "form-control"}})  
            @Html.ValidationMessageFor(Function(model) model.new_accountnumber, "", New With {.class = "text-danger"})  
        </div>  
    </div>  
  
    <div class="form-group">  
        @Html.LabelFor(Function(model) model.new_accountname, htmlAttributes:=New With {.class = "control-label col-md-2"})  
        <div class="col-md-10">  
            @Html.EditorFor(Function(model) model.new_accountname, New With {.htmlAttributes = New With {.class = "form-control"}})  
            @Html.ValidationMessageFor(Function(model) model.new_accountname, "", New With {.class = "text-danger"})  
        </div>  
    </div>  
  
    <div class="form-group">  
        @Html.LabelFor(Function(model) model.new_reference, htmlAttributes:=New With {.class = "control-label col-md-2"})  
        <div class="col-md-10">  
            @Html.EditorFor(Function(model) model.new_reference, New With {.htmlAttributes = New With {.class = "form-control"}})  
            @Html.ValidationMessageFor(Function(model) model.new_reference, "", New With {.class = "text-danger"})  
        </div>  
    </div>  
  
    <div class="form-group">  
        @Html.LabelFor(Function(model) model.new_defaultvalue, htmlAttributes:=New With {.class = "control-label col-md-2"})  
        <div class="col-md-10">  
            @Html.EditorFor(Function(model) model.new_defaultvalue, New With {.htmlAttributes = New With {.class = "form-control"}})  
            @Html.ValidationMessageFor(Function(model) model.new_defaultvalue, "", New With {.class = "text-danger"})  
        </div>  
    </div>  
    <div class="form-group">  
        <div class="col-md-offset-2 col-md-10">  
            <input type="submit" value="Create" class="btn btn-default" />  
        </div>  
    </div>  
</div>  
End Using  
  
<div>  
    @Html.ActionLink("Back to List", "Index")  
</div>  
  
@Section Scripts   
    @Scripts.Render("~/bundles/jqueryval")  
End Section