How to set a default value with Html.TextBoxFor?

Simple question, if you use the Html Helper from ASP.NET MVC Framework 1 it is easy to set a default value on a textbox because there is an overload Html.TextBox(string name, object value). When I tried using the Html.TextBoxFor method, my first guess was to try the following which did not work:

<%: Html.TextBoxFor(x => x.Age, new { va开发者_如何学Golue = "0"}) %>

Should I just stick with Html.TextBox(string, object) for now?

Try this:

<%= Html.TextBoxFor(x => x.Age, new { @Value = "0"}) %>

note that @Value has a capital V

This should work for MVC3 & MVC4

 @Html.TextBoxFor(m => m.Age, new { @Value = "12" }) 

If you want it to be a hidden field

 @Html.TextBoxFor(m => m.Age, new { @Value = "12",@type="hidden" }) 

It turns out that if you don't specify the Model to the View method within your controller, it doesn't create a object for you with the default values.

[AcceptVerbs(HttpVerbs.Get)]
public ViewResult Create()
{
  // Loads default values
  Instructor i = new Instructor();
  return View("Create", i);
}

[AcceptVerbs(HttpVerbs.Get)]
public ViewResult Create()
{
  // Does not load default values from instructor
  return View("Create");
}

The default value will be the value of your Model.Age property. That's kind of the whole point.

You can simply do :

<%= Html.TextBoxFor(x => x.Age, new { @Value = "0"}) %>

or better, this will switch to default value '0' if the model is null, for example if you have the same view for both editing and creating :

@Html.TextBoxFor(x => x.Age, new { @Value = (Model==null) ? "0" : Model.Age.ToString() })

This work for me

@Html.TextBoxFor(model => model.Age, htmlAttributes: new { @Value = "" })

value="0" will set defualt value for @Html.TextBoxfor

its case sensitive "v" should be capital

Below is working example:

@Html.TextBoxFor(m => m.Nights, 
    new { @min = "1", @max = "10", @type = "number", @id = "Nights", @name = "Nights", Value = "1" })

Here's how I solved it. This works if you also use this for editing.

@Html.TextBoxFor(m => m.Age, new { Value = Model.Age.ToString() ?? "0" })

Using @Value is a hack, because it outputs two attributes, e.g.:

<input type="..." Value="foo" value=""/>

You should do this instead:

@Html.TextBox(Html.NameFor(p => p.FirstName).ToString(), "foo")

this worked for me , in this way we setting the default value to empty string

@Html.TextBoxFor(m => m.Id, new { @Value = "" })

If you have a partial page form for both editing and adding, then the trick I use to default value to 0 is to do the following:

@Html.TextBox("Age", Model.Age ?? 0)

That way it will be 0 if unset or the actual age if it exists.

For .net core 5 setting value in htmlAttributes seems doesnt work. But you can use workaround:

var ageTextBox = (TagBuilder) Html.TextBoxFor(x => x.Age);
ageTextBox.Attributes.Remove("value");
ageTextBox.Attributes.Add("value", "value you want to set");

Try this also, that is remove new { } and replace it with string.

<%: Html.TextBoxFor(x => x.Age,"0") %>