What's the difference between Html.Label, Html.LabelFor and Html.LabelForModel

问题

What's the difference between @Html.Label(), @Html.LabelFor() and @Html.LabelForModel() methods?

回答1:

Html.Label gives you a label for an input whose name matches the specified input text (more specifically, for the model property matching the string expression):

// Model
public string Test { get; set; }

// View
@Html.Label("Test")

// Output
<label for="Test">Test</label>

Html.LabelFor gives you a label for the property represented by the provided expression (typically a model property):

// Model
public class MyModel
{
    [DisplayName("A property")]
    public string Test { get; set; }
}

// View
@model MyModel
@Html.LabelFor(m => m.Test)

// Output
<label for="Test">A property</label>

Html.LabelForModel is a bit trickier. It returns a label whose for value is that of the parameter represented by the model object. This is useful, in particular, for custom editor templates. For example:

// Model
public class MyModel
{
    [DisplayName("A property")]
    public string Test { get; set; }
}

// Main view
@Html.EditorFor(m => m.Test)

// Inside editor template
@Html.LabelForModel()

// Output
<label for="Test">A property</label>

回答2:

Html.Label - Just creates a label tag with whatever the string passed into the constructor is

Html.LabelFor - Creates a label for that specific property. This is strongly typed. By default, this will just do the name of the property (in the below example, it'll output MyProperty if that Display attribute wasn't there). Another benefit of this is you can set the display property in your model and that's what will be put here:

public class MyModel
{
    [Display(Name="My property title")
    public class MyProperty{get;set;}
}

In your view:

Html.LabelFor(x => x.MyProperty) //Outputs My property title

In the above, LabelFor will display <label for="MyProperty">My property title</label>. This works nicely so you can define in one place what the label for that property will be and have it show everywhere.

回答3:

I think that the usage of @Html.LabelForModel() should be explained in more detail.

The LabelForModel Method returns an HTML label element and the property name of the property that is represented by the model.

You could refer to the following code:

Code in model:

using System.ComponentModel;

[DisplayName("MyModel")]
public class MyModel
{
    [DisplayName("A property")]
    public string Test { get; set; }
}

Code in view:

@Html.LabelForModel()
<div class="form-group">

    @Html.LabelFor(model => model.Test, new { @class = "control-label col-md-2" })

    <div class="col-md-10">
        @Html.EditorFor(model => model.Test)
        @Html.ValidationMessageFor(model => model.Test)
    </div>
</div>

The output screenshot:

Reference to answer on the asp.net forum

回答4:

suppose you need a label with text customername than you can achive it using 2 ways

[1]@Html.Label("CustomerName")

[2]@Html.LabelFor(a => a.CustomerName)  //strongly typed

2nd method used a property from your model. If your view implements a model then you can use the 2nd method.