asp.netmodel-view-controllerviewasp.net-core-mvcattributes

Is it possible to update the view after a model attribute change?

In a view that I have modified a lot, I notice that the date format of the Datepickers is not adapted to what I want.

enter image description here

I do not want hours. After research, I discover that it is advisable to add an attribute to the DateTime properties of the model:

[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:dd MMM yyyy}")]

I then assume that this attribute addition should be applied to the view. But I do not know how to do it.

Can we reload a view so that it takes into account the changes, or should we delete it and build a new one?

Solution

  • Please allow me to share my test within .Net 8 MVC APP and I think this might be of benefit to show the result. Below is my code, and just like what you can see, I have different date format setting on the model, and I have type="date" configuration on one of the input.

    <div>
    <label asp-for="MyDate" class="control-label"></label>
    <input asp-for="MyDate" type="date" class="form-control" />
    <input asp-for="MyDate2" class="form-control" />
</div>

<div>
    @Html.TextBoxFor(m => m.MyDate, new { @type = "date" })
    @Html.TextBoxFor(m => m.MyDate2, new { })
</div>

public class MyModel
{
    [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:dd-MMM-yyyy}")]
    public DateTime MyDate { get; set; }
    [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:dd MMM yyyy}")]
    public DateTime MyDate2 { get; set; }
}

    enter image description here

    Just like what you can see in the screenshot, [DisplayFormat] makes the value in DOM has different behavior, but it doesn't affect the appearence in UI, it's type="date" makes the date input to only display date without time. In the meantime, the [DisplayFormat] attribution requires an application restart to take effect.