how to Dynamic setting Html.DropDownList attribute disabled in RazorView? [closed]

问题

Here it is my Drop-down:

@Html.DropDownList("OptionType", selectList, new { @class = "form-control", name = "OptionType",@disabled = "disabled" })

The above code can set DropDownList is disabled，but I want to dynamic set disabled attribute with a bool value from model. In other words if bool value = true, DropDownList is enable, else DropDownList is disabled. how to achieve it?

回答1:

If you want to disable the dropdown based on a property of your model:

@if(Model.DisableDropdown)
{ 
    @Html.DropDownList("OptionType", selectList, new { @disabled = "disabled", @class = "form-control" })
}
else
{
    @Html.DropDownList("OptionType", selectList, new { @class = "form-control" })
}

回答2:

You can try below code:

creating an extension for HtmlHelper:

public static class HtmlExtensions
{
    public static MvcHtmlString DropDownListFor<TModel, TProperty>(this HtmlHelper<TModel> html, Expression<Func<TModel, TProperty>> expression, IEnumerable<SelectListItem> selectList, string optionText, bool IsDisabled)
    {
        if (IsDisabled)   
            return html.DropDownListFor(expression, selectList, optionText, new { @disabled = "disabled" });
        else
            return html.DropDownListFor(expression, selectList, optionText);

    }
}

In razor view:

@Html.DropDownListFor(model => model.Type, Model.Types, "", Model.IsDisabled)

来源：https://stackoverflow.com/questions/44275015/how-to-dynamic-setting-html-dropdownlist-attribute-disabled-in-razorview

标签

asp.net-mvc

html-select