gridView1.OptionsSelection.MultiSelect = true;

gridView1.OptionsSelection.MultiSelect = True

//Enable multiple row selection.
gridView1.OptionsSelection.MultiSelect = true;
//Select the second, third, and fourth rows.
gridView1.SelectRows(1, 3);

'Enable multiple row selection.
gridView1.OptionsSelection.MultiSelect = True
'Select the second, third, and fourth rows.
gridView1.SelectRows(1, 3)

using DevExpress.XtraGrid.Views.Grid;

//...
gridView1.OptionsSelection.MultiSelect = true;
gridView1.OptionsSelection.MultiSelectMode = GridMultiSelectMode.CheckBoxRowSelect;

Imports DevExpress.XtraGrid.Views.Grid

'...
gridView1.OptionsSelection.MultiSelect = True
gridView1.OptionsSelection.MultiSelectMode = GridMultiSelectMode.CheckBoxRowSelect

using System.ComponentModel;
using DevExpress.Data;
using DevExpress.XtraEditors;
using DevExpress.XtraGrid.Views.Grid;

namespace DXApplication {
    public partial class Form1 : XtraForm {
        public Form1() {
            InitializeComponent();
            BindGridControl();
            //Enable multiple row selection.
            gridView1.OptionsSelection.MultiSelect = true;

            gridView1.SelectionChanged += GridView1_SelectionChanged;
            simpleButton1.Click += SimpleButton1_Click;
        }
        void SimpleButton1_Click(object sender, System.EventArgs e) {
            //Select rows based on a condition.
            SelectRoles("Guest", gridView1);
        }
        void GridView1_SelectionChanged(object sender, SelectionChangedEventArgs e) {
            memoEdit1.AppendText("The GridView's SelectionChanged event raised.\r\n");
        }
        void SelectRoles(string role, GridView gridView) {
            int rowHandle;
            gridView.BeginSelection();
            for(int i = 0; i < gridView1.RowCount; i++) {
                rowHandle = gridView.GetVisibleRowHandle(i);
                if (gridView.GetRowCellValue(gridView.GetVisibleRowHandle(i), "Role").ToString() == role)
                    gridView.SelectRow(rowHandle);
            }
            gridView.EndSelection();
        }
        void BindGridControl(){
            gridControl1.DataSource = new BindingList<DataItem>() {
                new DataItem(){ Role = "Admin", FullName = "Mike Spirit" },
                new DataItem(){ Role = "Guest", FullName = "Nathan White" },
                new DataItem(){ Role = "Guest", FullName = "Amanda Lee" },
                new DataItem(){ Role = "Moderator", FullName = "Jason Norton" },
                new DataItem(){ Role = "Moderator", FullName = "Mike Morris" },
            };
        }
    }

    public class DataItem {
        public string Role { get; set; }
        public string FullName { get; set; }
    }
}

Imports Microsoft.VisualBasic
Imports System.ComponentModel
Imports DevExpress.Data
Imports DevExpress.XtraEditors
Imports DevExpress.XtraGrid.Views.Grid

Namespace DXApplication
    Partial Public Class Form1
        Inherits XtraForm

        Public Sub New()
            InitializeComponent()
            BindGridControl()
            'Enable multiple row selection.
            gridView1.OptionsSelection.MultiSelect = True

            AddHandler gridView1.SelectionChanged, AddressOf GridView1_SelectionChanged
            AddHandler simpleButton1.Click, AddressOf SimpleButton1_Click
        End Sub
        Private Sub SimpleButton1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
            'Select rows based on a condition.
            SelectRoles("Guest", gridView1)
        End Sub
        Private Sub GridView1_SelectionChanged(ByVal sender As Object, ByVal e As SelectionChangedEventArgs)
            memoEdit1.AppendText("The GridView's SelectionChanged event raised." & vbCrLf)
        End Sub
        Private Sub SelectRoles(ByVal role As String, ByVal gridView As GridView)
            Dim rowHandle As Integer
            gridView.BeginSelection()
            For i As Integer = 0 To gridView1.RowCount - 1
                rowHandle = gridView.GetVisibleRowHandle(i)
                If gridView.GetRowCellValue(gridView.GetVisibleRowHandle(i), "Role").ToString() = role Then
                    gridView.SelectRow(rowHandle)
                End If
            Next i
            gridView.EndSelection()
        End Sub
        Private Sub BindGridControl()
            gridControl1.DataSource = New BindingList(Of DataItem)() From {
                New DataItem() With {
                    .Role = "Admin",
                    .FullName = "Mike Spirit"
                },
                New DataItem() With {
                    .Role = "Guest",
                    .FullName = "Nathan White"
                },
                New DataItem() With {
                    .Role = "Guest",
                    .FullName = "Amanda Lee"
                },
                New DataItem() With {
                    .Role = "Moderator",
                    .FullName = "Jason Norton"
                },
                New DataItem() With {
                    .Role = "Moderator",
                    .FullName = "Mike Morris"
                }
            }
        End Sub
    End Class

    Public Class DataItem
        Public Property Role() As String
        Public Property FullName() As String
    End Class
End Namespace

using DevExpress.XtraGrid.Views.Grid;

//...
gridView1.OptionsSelection.MultiSelect = true;
gridView1.OptionsSelection.MultiSelectMode = GridMultiSelectMode.CellSelect;

Imports DevExpress.XtraGrid.Views.Grid

'...
gridView1.OptionsSelection.MultiSelect = True
gridView1.OptionsSelection.MultiSelectMode = GridMultiSelectMode.CellSelect

using DevExpress.XtraGrid.Views.Base;
using DevExpress.XtraGrid.Views.Grid;

//...
gridView1.OptionsSelection.MultiSelect = true;
gridView1.OptionsSelection.MultiSelectMode = GridMultiSelectMode.CellSelect;
gridView1.SelectCell(0, gridView1.Columns["Role"]);
gridView1.SelectCells(new GridCell(1, gridView1.Columns["FullName"]), new GridCell(3, gridView1.Columns["FullName"]));

Imports DevExpress.XtraGrid.Views.Base
Imports DevExpress.XtraGrid.Views.Grid

'...
gridView1.OptionsSelection.MultiSelect = True
gridView1.OptionsSelection.MultiSelectMode = GridMultiSelectMode.CellSelect
gridView1.SelectCell(0, gridView1.Columns("Role"))
gridView1.SelectCells(New GridCell(1, gridView1.Columns("FullName")), New GridCell(3, gridView1.Columns("FullName")))

gridView1.SelectionChanging += (s, e) => {
    e.Cancel = e.Action == CollectionChangeAction.Add && e.ControllerRow <= 4;
};

gridView1.SelectionChanging += Function(s, e)
    e.Cancel = e.Action = CollectionChangeAction.Add AndAlso e.ControllerRow <= 4
End Function

gridColumn1.AppearanceCell.Options.HighPriority = true;

GridColumn1.AppearanceCell.Options.HighPriority = True

void Form1_Load(object sender, EventArgs e) {
    gridView1.OptionsSelection.EnableAppearanceHideSelection = false;
    gridView1.OptionsSelection.EnableAppearanceFocusedCell = false;
}

Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
    gridView1.OptionsSelection.EnableAppearanceHideSelection = False
    gridView1.OptionsSelection.EnableAppearanceFocusedCell = False
End Sub

ArrayList rows = new ArrayList();

// Add the selected rows to the list.
Int32[] selectedRowHandles = gridView1.GetSelectedRows();
for (int i = 0; i < selectedRowHandles.Length; i++) {
    int selectedRowHandle = selectedRowHandles[i];
    if (selectedRowHandle >= 0)
        rows.Add(gridView1.GetDataRow(selectedRowHandle));
}
try {
    gridView1.BeginUpdate();
    for (int i = 0; i < rows.Count; i++) {
        DataRow row = rows[i] as DataRow;
        // Change the field value.
        row["Discontinued"] = true;
    }
}
finally {
    gridView1.EndUpdate();
}

Dim Rows As New ArrayList()

' Add the selected rows to the list.
Dim selectedRowHandles As Int32() = GridView1.GetSelectedRows()
Dim I As Integer
For I = 0 To selectedRowHandles.Length - 1
    Dim selectedRowHandle As Int32 = selectedRowHandles(I)
    If (selectedRowHandle >= 0) Then
        Rows.Add(GridView1.GetDataRow(selectedRowHandle))
    End If
Next
Try
    GridView1.BeginUpdate()
    For I = 0 To Rows.Count - 1
        Dim Row As DataRow = CType(Rows(I), DataRow)
        ' Change the field value.
        Row("Discontinued") = True
    Next
Finally
    GridView1.EndUpdate()
End Try

using DevExpress.XtraGrid.Views.Grid;
using DevExpress.XtraGrid.Views.Grid.ViewInfo;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Drawing;
using DevExpress.Data;
using DevExpress.XtraGrid.Columns;
using DevExpress.Utils;

namespace DXApplication16 {
    public partial class Form1 : FluentDesignForm {
        // The list of selected columns:
        ArrayList selectedColumns;

        public Form1() {
            InitializeComponent();
            gridView1.MouseDown += GridView1_MouseDown;
            this.Load += Form1_Load;
        }

        private void Form1_Load(object sender, System.EventArgs e) {
            selectedColumns = new ArrayList();
        }

        private void GridView1_MouseDown(object sender, MouseEventArgs e) {
            GridView view = sender as GridView;
            GridHitInfo info = view.CalcHitInfo(new Point(e.X, e.Y));

            if (info.InColumn & e.Button == MouseButtons.Left) {
                // Disable sort operations when a user left-clicks a header.
                info.Column.OptionsColumn.AllowSort = DefaultBoolean.False;
                // Check whether the clicked column is already in the list.
                if (!selectedColumns.Contains(info.Column.FieldName)) {
                    // If not, custom draw its cells and add it to the list.
                    info.Column.AppearanceCell.Assign(view.PaintAppearance.SelectedRow);
                    selectedColumns.Add(info.Column.Name);
                }
                else {
                    // Otherwise, remove this column from the selected columns list
                    // and reset its cell appearances.
                    selectedColumns.Remove(info.Column.Name);
                    info.Column.AppearanceCell.Reset();
                }
            }
            else {
                // If anything but a column header is clicked,
                // reset all column cell appearances and clear the list.
                if (selectedColumns.Count != 0) {
                    foreach (string name in selectedColumns)
                        view.Columns.ColumnByName(name).AppearanceCell.BackColor =
                            Color.Transparent;
                    selectedColumns.Clear();
                }
            }

            // Users can still right-click a header and choose sort options.
            if (info.InColumn & e.Button == MouseButtons.Right) {
                info.Column.OptionsColumn.AllowSort = DefaultBoolean.Default;
            }
        }
    }
}

Imports DevExpress.XtraGrid.Views.Grid
Imports DevExpress.XtraGrid.Views.Grid.ViewInfo
Imports System.Collections
Imports System.ComponentModel
Imports System.Windows.Forms
Imports System.Drawing
Imports DevExpress.Data
Imports DevExpress.XtraGrid.Columns
Imports DevExpress.Utils

Namespace DXApplication16
    Partial Public Class Form1
        Inherits FluentDesignForm

        ' The list of selected columns:
        Private selectedColumns As ArrayList

        Public Sub New()
            InitializeComponent()
            AddHandler gridView1.MouseDown, AddressOf GridView1_MouseDown
            AddHandler Me.Load, AddressOf Form1_Load
        End Sub

        Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs)
            selectedColumns = New ArrayList()
        End Sub

        Private Sub GridView1_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)
            Dim view As GridView = TryCast(sender, GridView)
            Dim info As GridHitInfo = view.CalcHitInfo(New Point(e.X, e.Y))

            If info.InColumn And e.Button = MouseButtons.Left Then
                ' Disable sort operations when a user left-clicks a header.
                info.Column.OptionsColumn.AllowSort = DefaultBoolean.False
                ' Check whether the clicked column is already in the list.
                If Not selectedColumns.Contains(info.Column.FieldName) Then
                    ' If not, custom draw its cells and add it to the list.
                    info.Column.AppearanceCell.Assign(view.PaintAppearance.SelectedRow)
                    selectedColumns.Add(info.Column.Name)
                Else
                    ' Otherwise, remove this column from the selected columns list
                    ' and reset its cell appearances.
                    selectedColumns.Remove(info.Column.Name)
                    info.Column.AppearanceCell.Reset()
                End If
            Else
                ' If anything but a column header is clicked,
                ' reset all column cell appearances and clear the list.
                If selectedColumns.Count <> 0 Then
                    For Each name As String In selectedColumns
                        view.Columns.ColumnByName(name).AppearanceCell.BackColor = Color.Transparent
                    Next name
                    selectedColumns.Clear()
                End If
            End If

            ' Users can still right-click a header and choose sort options.
            If info.InColumn And e.Button = MouseButtons.Right Then
                info.Column.OptionsColumn.AllowSort = DefaultBoolean.Default
            End If
        End Sub
    End Class
End Namespace