yavsc/Yavsc/Views/Do/Edit.cshtml

@model UserActivity 
@{ ViewData["Title"] = "Edit"; }

<h2>Edit</h2>

<form asp-action="Edit">
    <div class="form-horizontal">
        <h4>UserActivity</h4>
        <hr />
        <input type="hidden" asp-for="UserId" />
        <input type="hidden" asp-for="DoesCode" />
        <div class="text-danger"> @Html.ValidationSummary()
        </div>
        <div class="form-group">
            <label asp-for="Weight" class="col-md-2 control-label"></label>
            <div class="col-md-10">
                <input asp-for="Weight" class="form-control"></input>
            </div>
        </div>
        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Save" class="btn btn-default" />
            </div>
        </div>
    </div>
</form>

<div>
    <a asp-action="Index">Back to List</a>
</div>