How to create select element with selected option in shopping cart view
In ASP.NET Core 5 MVC shopping cart Razor view in used to create cart layout selector.
In ASP.NET MVC 4.7 it works OK but in .NET Core lines which set selected option
<option value="List" @(Model.LocatorViewModel.CartLayout == CartLayout.List ? "selected" : "" )>
show syntax error in razor editor in VS 2019:
Which is property method to create select element selected attribute in Razor? Bootstrap 3 is used.
<div id="collapseOne" class="panel-collapse collapse in" role="tabpanel" aria-labelledby="headingOne">
<div class="panel-body">
<label>
@await I.I("Display mode")
<select name="cartlayout" class="form-control" onchange="this.form.submit()">
<option value="List" @(Model.LocatorViewModel.CartLayout == CartLayout.List ? "selected" : "" )>
@await I.I("List")
</option>
<option value="Thumb" @(Model.LocatorViewModel.CartLayout == CartLayout.Thumb ? "selected" : "" )>
@await I.I("Thumbnails")
</option>
</select>
</label>
</div>
</div>
Solution
As error message indicated, the 'OptionTagHelper' can not have C# in the element's attribute declaration area.
In the code you shared, it seems that the option works as just plain HTML <option> in your scenario. If so, you can try to apply @removeTagHelper to a specific view that would help remove the specified Tag Helper from the view.
@removeTagHelper Microsoft.AspNetCore.Mvc.TagHelpers.OptionTagHelper, Microsoft.AspNetCore.Mvc.TagHelpers
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