How to set a default value with Html.TextBoxFor?

问题

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 { value = "0"}) %>

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

回答1:

you can try this

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

回答2:

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" })

回答3:

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");
}

回答4:

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

回答5:

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() })

回答6:

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" })

回答7:

This work for me

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

回答8:

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")

回答9:

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" })

回答10:

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

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

回答11:

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.

回答12:

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

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

来源：https://stackoverflow.com/questions/3034986/how-to-set-a-default-value-with-html-textboxfor

标签

asp.net-mvc-2

html-helper