DataLayoutControl.FieldRetrieved Event

Fires after a layout is generated at runtime. Allows you to customize settings of individual generated layout items and editors.

Namespace: DevExpress.XtraDataLayout

Assembly: DevExpress.XtraLayout.v19.1.dll

Declaration

C#

[DXCategory("Data")]
public event EventHandler<FieldRetrievedEventArgs> FieldRetrieved

VB.NET

<DXCategory("Data")>
Public Event FieldRetrieved As EventHandler(Of FieldRetrievedEventArgs)

Event Data

The FieldRetrieved event's data class is DevExpress.XtraDataLayout.FieldRetrievedEventArgs.

Remarks

The FieldRetrieved event fires after a layout is generated at runtime in the following cases:

• When the DataLayoutControl.RetrieveFields method is called.
• When automatic layout generation is invoked at runtime. This feature is invoked each time the DataLayoutControl.DataSource property is set to a new value, provided that the DataLayoutControl.AutoRetrieveFields property is enabled.

The FieldRetrieved event fires for each generated layout item. Handle this event to customize settings of individual layout items and editors.

Example

This example shows how to handle the DataLayoutControl.FieldRetrieving and DataLayoutControl.FieldRetrieved events to customize binding information, and settings of auto-generated layout items and embedded editors.

In the example, the DataLayoutControl.FieldRetrieving event is handled to assign a ComboBoxEdit control for editing the ZipCode field. Items are added to the ComboBoxEdit after the editor is created (in the DataLayoutControl.FieldRetrieved event).

In the DataLayoutControl.FieldRetrieving event handler, the DataSourceUpdateMode parameter is set to OnPropertyChanged. For instance, this forces the “Full Name” field to be updated immediately on typing text in the “First Name” and “Last Name” fields.

The following image shows the result:

Note

A complete sample project is available at https://github.com/DevExpress-Examples/datalayoutcontrol-how-to-customize-binding-info-and-auto-generated-layout-items-t246872

Form1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using DevExpress.XtraEditors;
using DevExpress.XtraEditors.Controls;
using DevExpress.XtraEditors.Repository;

namespace DataLayoutControl_FieldRetrieve {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e) {
            BindingSource personBindingSource = new BindingSource();
            personBindingSource.DataSource = typeof(Person);
            personBindingSource.AddNew();

            dataLayoutControl1.FieldRetrieving += dataLayoutControl1_FieldRetrieving;
            dataLayoutControl1.FieldRetrieved += dataLayoutControl1_FieldRetrieved;
            dataLayoutControl1.DataSource = personBindingSource;

            dataLayoutControl1.RetrieveFields();
        }

        void dataLayoutControl1_FieldRetrieving(object sender, DevExpress.XtraDataLayout.FieldRetrievingEventArgs e) {
            if (e.FieldName == "ZipCode") 
                e.EditorType = typeof(ComboBoxEdit);
            e.DataSourceUpdateMode = DataSourceUpdateMode.OnPropertyChanged;
            e.Handled = true;
        }

        void dataLayoutControl1_FieldRetrieved(object sender, DevExpress.XtraDataLayout.FieldRetrievedEventArgs e) {
            if (e.FieldName == "FirstName" || e.FieldName == "LastName") {
                e.Control.BackColor = Color.GreenYellow;
            }
            if (e.FieldName == "ZipCode") {
                RepositoryItemComboBox riComboBox = e.RepositoryItem as RepositoryItemComboBox;
                riComboBox.TextEditStyle = TextEditStyles.DisableTextEditor;
                riComboBox.Items.Add("20505");
                riComboBox.Items.Add("20506");
                riComboBox.Items.Add("20507");
                riComboBox.Items.Add("20508");
                riComboBox.Items.Add("20509");
            }
        }
    }

    public class Person {
        [Display(GroupName = "<GroupName->")]
        public string FirstName { get; set; }
        [Display(GroupName = "<GroupName->")]
        public string LastName { get; set; }
        public string FullName { get { return FirstName + " " + LastName; } }
        [Display(GroupName = "<GroupPhone->")]
        public string Phone { get; set; }
        [Display(GroupName = "<GroupPhone->")]
        public string Email { get; set; }
        [Display(GroupName = "Address")]
        public string City { get; set; }
        [Display(GroupName = "Address")]
        public string ZipCode { get; set; }
    }


}

Form1.vb

Imports System
Imports System.Collections.Generic
Imports System.ComponentModel
Imports System.ComponentModel.DataAnnotations
Imports System.Data
Imports System.Drawing
Imports System.Linq
Imports System.Text
Imports System.Threading.Tasks
Imports System.Windows.Forms
Imports DevExpress.XtraEditors
Imports DevExpress.XtraEditors.Controls
Imports DevExpress.XtraEditors.Repository

Namespace DataLayoutControl_FieldRetrieve
    Partial Public Class Form1
        Inherits Form

        Public Sub New()
            InitializeComponent()
        End Sub

        Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
            Dim personBindingSource As New BindingSource()
            personBindingSource.DataSource = GetType(Person)
            personBindingSource.AddNew()

            AddHandler dataLayoutControl1.FieldRetrieving, AddressOf dataLayoutControl1_FieldRetrieving
            AddHandler dataLayoutControl1.FieldRetrieved, AddressOf dataLayoutControl1_FieldRetrieved
            dataLayoutControl1.DataSource = personBindingSource

            dataLayoutControl1.RetrieveFields()
        End Sub

        Private Sub dataLayoutControl1_FieldRetrieving(ByVal sender As Object, ByVal e As DevExpress.XtraDataLayout.FieldRetrievingEventArgs)
            If e.FieldName = "ZipCode" Then
                e.EditorType = GetType(ComboBoxEdit)
            End If
            e.DataSourceUpdateMode = DataSourceUpdateMode.OnPropertyChanged
            e.Handled = True
        End Sub

        Private Sub dataLayoutControl1_FieldRetrieved(ByVal sender As Object, ByVal e As DevExpress.XtraDataLayout.FieldRetrievedEventArgs)
            If e.FieldName = "FirstName" OrElse e.FieldName = "LastName" Then
                e.Control.BackColor = Color.GreenYellow
            End If
            If e.FieldName = "ZipCode" Then
                Dim riComboBox As RepositoryItemComboBox = TryCast(e.RepositoryItem, RepositoryItemComboBox)
                riComboBox.TextEditStyle = TextEditStyles.DisableTextEditor
                riComboBox.Items.Add("20505")
                riComboBox.Items.Add("20506")
                riComboBox.Items.Add("20507")
                riComboBox.Items.Add("20508")
                riComboBox.Items.Add("20509")
            End If
        End Sub
    End Class

    Public Class Person
        <Display(GroupName := "<GroupName->")> _
        Public Property FirstName() As String
        <Display(GroupName := "<GroupName->")> _
        Public Property LastName() As String
        Public ReadOnly Property FullName() As String
            Get
                Return FirstName & " " & LastName
            End Get
        End Property
        <Display(GroupName := "<GroupPhone->")> _
        Public Property Phone() As String
        <Display(GroupName := "<GroupPhone->")> _
        Public Property Email() As String
        <Display(GroupName := "Address")> _
        Public Property City() As String
        <Display(GroupName := "Address")> _
        Public Property ZipCode() As String
    End Class


End Namespace

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the FieldRetrieved event.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

datalayoutcontrol-how-to-customize-binding-info-and-auto-generated-layout-items-t246872/CS/DataLayoutControl-FieldRetrieve/Form1.cs#L27

dataLayoutControl1.FieldRetrieving += dataLayoutControl1_FieldRetrieving;
dataLayoutControl1.FieldRetrieved += dataLayoutControl1_FieldRetrieved;
dataLayoutControl1.DataSource = personBindingSource;

VB.NET

datalayoutcontrol-how-to-customize-binding-info-and-auto-generated-layout-items-t246872/VB/DataLayoutControl-FieldRetrieve/Form1.vb#L29

AddHandler dataLayoutControl1.FieldRetrieving, AddressOf dataLayoutControl1_FieldRetrieving
AddHandler dataLayoutControl1.FieldRetrieved, AddressOf dataLayoutControl1_FieldRetrieved
dataLayoutControl1.DataSource = personBindingSource