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Syncfusion, Inc.

Creating a Floating Label Layout in Xamarin.Forms DataForm

Suresh Mohan
Suresh is a Product Manager at Syncfusion and a technology enthusiast. He helps people follow best practices in coding and in using Syncfusion controls in their applications.
Originally published at syncfusion.com on ・7 min read

The Syncfusion Xamarin.Forms DataForm supports a floating label layout that includes features such as assistive labels, leading and trailing icons, and a password toggle icon to show or hide a password. It enhances the user experience of filling the DataForm by showing hints and error messages in a more intuitive way. In this blog, I will explain how to add a floating label layout in Xamarin.Forms DataForm control.

Floating Label Layout in Xamarin.Forms DataForm
Floating Label Layout in Xamarin.Forms DataForm

Before reading further, go through the Getting Started with Xamarin.Forms DataForm documentation.

Adding the floating label layout in the DataForm

By default, the DataForm arranges editors and their labels corresponding to data fields in the stack layout. You can enable the floating label layout in Xamarin.Forms DataForm by setting the LayoutOptions property of the DataForm or DataFormItem to TextInputLayout.

Refer to the following code.

<dataForm:SfDataForm x:Name="dataForm" LayoutOptions="TextInputLayout">
 <dataForm:SfDataForm/>
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Editors supported in DataForm floating label layout

The Xamarin.Forms DataForm supports the floating label layout for the following editors:

  • Text editor
  • Password editor
  • Masked edit text editor
  • Numeric editor
  • Multiline text editor
  • Date editor
  • Time editor
  • Picker editor
  • Drop-down editor
  • Autocomplete editor

Features of DataForm floating label layout

Important features of the floating label layout are:

Container types

Containers help us enhance the appearance of the editor views and provide some contrast between editors and assistive labels. The three container types are:

  • Outlined
  • Filled
  • None

Refer to the following code.

<dataForm:SfDataForm
        x:Name="dataForm"
          ContainerType="Outlined">
</dataForm:SfDataForm>
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The default container type is Outlined. You can also set the container type to Filled and None.

Outlined Container in Xamarin.Forms DataForm
Outlined Container in Xamarin.Forms DataForm

Leading and trailing views

Adding a leading icon helps indicate the expected input types, such as birth dates, phone numbers, or passwords. Use the trailing icons to include clear buttons, error icons, voice input symbols, and drop-down symbols.

To add these icons, use the LeadingView and TrailingView properties in the TextInputLayoutSettings of the DataFormItem. Use the LeadingViewPosition and TrailingViewPosition properties to change the position of the leading and trailing views respectively.

Refer to the following code example.

dataForm.AutoGeneratingDataFormItem += DataForm_AutoGeneratingDataFormItem;

private void DataForm_AutoGeneratingDataFormItem1(object sender, AutoGeneratingDataFormItemEventArgs e)
{
    if (e.DataFormItem != null)
    {
        if (e.DataFormItem.Name.Equals("ContactNumber"))
        {
            e.DataFormItem.TextInputLayoutSettings = new TextInputLayoutSettings()
            {
                LeadingView = new Label()
                {
                    VerticalTextAlignment = Device.RuntimePlatform == Device.iOS ? TextAlignment.Center : TextAlignment.Start,
                    FontSize = Device.RuntimePlatform == Device.iOS ? 18 : 24,
                    Text = "F",
                    FontFamily = Device.RuntimePlatform == Device.iOS ? "ContactsIcons" :
                                                            Device.RuntimePlatform == Device.Android ? "ContactsIcons.ttf#ContactsIcons" : "Assets/Fonts/ContactsIcons.ttf#ContactsIcons"
                },

                TrailingView = new Label()
                {
                    VerticalTextAlignment = Device.RuntimePlatform == Device.iOS ? TextAlignment.Center : TextAlignment.Start,
                    FontSize = Device.RuntimePlatform == Device.iOS ? 18 : 24,
                    Text = "A",
                    FontFamily = Device.RuntimePlatform == Device.iOS ? "ContactsIcons" : Device.RuntimePlatform == Device.Android ? "ContactsIcons.ttf#ContactsIcons" : "Assets/Fonts/ContactsIcons.ttf#ContactsIcons"
                },
            };
        }
    }
}
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Leading and Trailing View Icons in Xamarin.Forms DataForm
Leading and Trailing View Icons in Xamarin.Forms DataForm

Helper text, error text, and character counter

Displaying helper and error texts is essential to all types of form-filling. With these assistive labels, we can communicate to the users what type of input is expected. We can also show error messages when the typed input is not in the expected format.

Helper text label

Display a watermark in the editor fields to provide a hint for users. It can be set using Prompt. The helper text in the Xamarin.Forms DataForm floating label layout can be collapsed by setting the ShowHelperText to false in the DataForm or TextInputLayoutSettings.

Refer to the following code.

<dataForm:SfDataForm x:Name=”dataForm” LayoutOptions=”TextInputLayout" ShowHelperText="False">
  <dataForm:SfDataForm/>
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Helper Text Label in Xamarin.Forms DataForm
Helper Text Label in Xamarin.Forms DataForm

Validation label

Also, the Xamarin.Forms DataForm allows you to display validation messages for the data provided.

Refer to the following code example.

private string _Name;

[Required(AllowEmptyStrings = false, ErrorMessage = "Name should not be empty")]
[StringLength(10, ErrorMessage = "Name should not exceed 10 characters")]
public string Name
{
    get { return this._Name; }
    set
    {
        this._Name = value;
        this.RaisePropertyChanged("Name");
    }
}
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Validation Label in Xamarin.Forms DataForm
Validation Label in Xamarin.Forms DataForm

Counter label

Use this label to display the character count limitation in a given form field validation. To enable this feature, set the ShowCharCount property to true. The character limit can be set using the StringLength attribute.

Refer to the following code example.

dataForm.AutoGeneratingDataFormItem += DataForm_AutoGeneratingDataFormItem;

private void DataForm_AutoGeneratingDataFormItem(object sender, AutoGeneratingDataFormItemEventArgs e)
{
    if (e.DataFormItem != null && e.DataFormItem.Name == "Password")
    {
        e.DataFormItem.ShowCharCount = true;
    }
}

private string _Password;

[Required(AllowEmptyStrings = false, ErrorMessage = "Password should not be empty")]
[StringLength(10, ErrorMessage = "Password should not exceed 10 characters")]
public string Password
{
    get { return this._Password; }
    set
    {
        this._Password = value;
        this.RaisePropertyChanged("Password");
    }
}
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Character Counter Label in Xamarin.Forms DataForm
Character Counter Label in Xamarin.Forms DataForm

Color customizations

Customize the in-focus, out-of-focus, error, valid message, and container colors to enrich the appearance of your application.

Refer to the following code example.

dataForm.AutoGeneratingDataFormItem += DataForm_AutoGeneratingDataFormItem;
dataForm.ContainerBackgroundColor = Color.Silver;

private void DataForm_AutoGeneratingDataFormItem1(object sender, AutoGeneratingDataFormItemEventArgs e)
{
    if (e.DataFormItem != null)
    {
        if (e.DataFormItem.Name == "Name")
        {
            e.DataFormItem.FocusedColor = Color.Violet;
            e.DataFormItem.UnfocusedColor = Color.Silver;
            e.DataFormItem.ErrorMessageColor = Color.DarkRed;
            e.DataFormItem.ValidMessageColor = Color.BlueViolet;
        }
    }
}
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Color Customizations in Xamarin.Forms DataForm
Color Customizations in Xamarin.Forms DataForm

GitHub repository

You can get the complete code example for the Xamarin.Forms DataForm with floating labels on GitHub.

Conclusion

Thanks for reading! In this blog post, we’ve discussed how to add a floating label layout in our Xamarin.Forms DataForm control. This feature helps modernize the look of your data form by showing assistive labels, leading and trailing icons, and more. For more details, go through our floating label layout in Xamarin DataForm documentation. Try out the procedures in this blog post and leave your comments in the feedback section below!

The Syncfusion Xamarin suite has over 155 controls from basic editors to powerful, advanced controls like DataGrid, Charts, ListView, and RTE. Use them to build mesmerizing applications!

You can also contact us through our support forums, Direct-Trac, or feedback portal. We are always happy to assist you!

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