DataFormDateItem Class
Stores settings of the data form’s date editor.
Namespace: DevExpress.Maui.DataForm
Assembly: DevExpress.Maui.Editors.dll
NuGet Package: DevExpress.Maui.Editors
#Declaration
public class DataFormDateItem :
DataFormTextItemBase
#Remarks
The DataFormView component automatically creates a DataFormDateItem
for the bound data object’s properties of the DateTime type. You can also add a date-time editor and modify its properties manually in XAML or C# code.
The following image shows a Data Form with a date-time editor:
For a list of all supported editors in the DataFormView, refer to the following topic: Data Form – Editors.
#Get Started
The following help topic describes how to create your first app with the DevExpress Data Form component for MAUI:
#Define Date-Time Editor Settings in XAML
Specify the DataFormView.DataObject property to define an object whose properties are to be edited in the DataFormView.
To show a date-time editor in a DataFormView, add a DataFormDateItem
object to the DataFormView.Items collection.
Use the item’s FieldName property to specify the name of the property to be edited in the Data Form.
Note: The DataFormView.Items property is a content property. You can skip the <Items>
tag in your markup.
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:dxdf="clr-namespace:DevExpress.Maui.DataForm;assembly=DevExpress.Maui.Editors"
x:Class="DateItemSample.MainPage" Shell.NavBarIsVisible="False"
xmlns:local="clr-namespace:DateItemSample">
<dxdf:DataFormView x:Name="dataForm" CommitMode="Input" IsAutoGenerationEnabled="False">
<dxdf:DataFormView.DataObject>
<local:UserInfo/>
</dxdf:DataFormView.DataObject>
<dxdf:DataFormDateItem FieldName="BirthDate" LabelText="Birth Date"
AutofillContentType="AndroidBirthDate"
ClearIconVisibility="Always"
DisplayFormat="m"
MinDate="1920,01,01"
UseNativePicker="False"
EditorWidth="300"
HelpText="Your date of birth"/>
</dxdf:DataFormView>
</ContentPage>
using DevExpress.Maui.Core;
using DevExpress.Maui.DataForm;
using DevExpress.Maui.Editors;
using System.ComponentModel;
using System.Runtime.CompilerServices;
namespace DateItemSample {
public class UserInfo : INotifyPropertyChanged {
string username;
public string Username {
get { return this.username; }
set {
if (value != this.username) {
this.username = value;
NotifyPropertyChanged();
}
}
}
DateTime birthDate;
public DateTime BirthDate {
get { return this.birthDate; }
set {
if (value != this.birthDate) {
this.birthDate = value;
NotifyPropertyChanged();
}
}
}
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged([CallerMemberName] String propertyName = "") {
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}
public partial class MainPage : ContentPage {
public MainPage() {
InitializeComponent();
}
}
}
#Use Attributes to Generate the Editor
You can apply the DataFormDateEditorAttribute to the Data Object’s property whose values you want to edit in a date editor in the DataFormView. Additionally, you can use the DataFormDisplayOptionsAttribute and DataFormItemPositionAttribute to configure display settings for the editor:
using DevExpress.Maui.DataForm;
using System.ComponentModel;
using System.Runtime.CompilerServices;
namespace DateItemSample {
public class UserInfo : INotifyPropertyChanged {
string username;
public string Username {
get { return this.username; }
set {
if (value != this.username) {
this.username = value;
NotifyPropertyChanged();
}
}
}
DateTime birthDate;
[DataFormDateEditor (AutofillContentType = DateAutofillContentType.AndroidBirthDate, ClearIconVisibility = IconVisibility.Always,
DisplayFormat = "m", MinDate = "1920,01,01", UseNativePicker = false)]
[DataFormDisplayOptions (EditorWidth = "300", HelpText = "Your date of birth", LabelText = "Birth Date")]
public DateTime BirthDate {
get { return this.birthDate; }
set {
if (value != this.birthDate) {
this.birthDate = value;
NotifyPropertyChanged();
}
}
}
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged([CallerMemberName] String propertyName = "") {
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}
public partial class MainPage : ContentPage {
public MainPage() {
InitializeComponent();
dataForm.DataObject = new UserInfo();
}
}
}
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:dxdf="clr-namespace:DevExpress.Maui.DataForm;assembly=DevExpress.Maui.Editors"
x:Class="DateItemSample.MainPage" Shell.NavBarIsVisible="False"
xmlns:local="clr-namespace:DateItemSample">
<dxdf:DataFormView x:Name="dataForm" CommitMode="Input" IsAutoGenerationEnabled="True">
<!--...-->
</dxdf:DataFormView>
</ContentPage>
#Validate Input
You can use the following techniques to validate user input values:
Use data annotations.
Handle the DataFormView.ValidateProperty and/or DataFormView.ValidateForm event.
Implement the IDataErrorInfo or INotifyDataErrorInfo interface in the Data Object.
For more information about input data validation, refer to the following help topic: Validate User Input in Data Form.
#Manage the Display Item Value
You can use the following methods to specify or obtain the editor value or display text:
- DataFormItem.SetValue(Object newValue) – Specifies the Data Form editor value.
- DataFormItem.GetValue() – Returns the current value of the data form editor.
- DataFormView.GetValue(String propertyName) – Returns the current value of a Data Form editor by the name of the property to which the editor is bound.
#Specify Layout
Refer to the following help topic for more information on how to position editors in a DataFormView: