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Form1.cs
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Form1.cs
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using System;
using System.Windows.Forms;
using DevExpress.Xpo;
using System.Linq;
namespace Distinct {
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : Form {
private DevExpress.XtraGrid.GridControl gridControl1;
private DevExpress.XtraGrid.Views.Grid.GridView gridView1;
private DevExpress.XtraGrid.Columns.GridColumn colCompanyName;
private Button XPView;
private Button LINQ;
private Button PersAlias;
/// <summary>
/// Required designer variable.
/// </summary>
private readonly System.ComponentModel.Container components = null;
public Form1() {
//
// Required for Windows Form Designer support
//
InitializeComponent();
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose(bool disposing) {
if(disposing) {
if(components != null) {
components.Dispose();
}
if(gridView1 != null) {
gridView1.Dispose();
gridView1 = null;
}
if(colCompanyName != null) {
colCompanyName.Dispose();
colCompanyName = null;
}
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent() {
this.gridControl1 = new DevExpress.XtraGrid.GridControl();
this.gridView1 = new DevExpress.XtraGrid.Views.Grid.GridView();
this.colCompanyName = new DevExpress.XtraGrid.Columns.GridColumn();
this.XPView = new System.Windows.Forms.Button();
this.LINQ = new System.Windows.Forms.Button();
this.PersAlias = new System.Windows.Forms.Button();
((System.ComponentModel.ISupportInitialize)(this.gridControl1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.gridView1)).BeginInit();
this.SuspendLayout();
//
// gridControl1
//
this.gridControl1.Cursor = System.Windows.Forms.Cursors.Default;
this.gridControl1.Dock = System.Windows.Forms.DockStyle.Bottom;
this.gridControl1.Location = new System.Drawing.Point(0, 59);
this.gridControl1.MainView = this.gridView1;
this.gridControl1.Name = "gridControl1";
this.gridControl1.Size = new System.Drawing.Size(613, 388);
this.gridControl1.TabIndex = 0;
this.gridControl1.ViewCollection.AddRange(new DevExpress.XtraGrid.Views.Base.BaseView[] {
this.gridView1});
//
// gridView1
//
this.gridView1.Columns.AddRange(new DevExpress.XtraGrid.Columns.GridColumn[] {
this.colCompanyName});
this.gridView1.GridControl = this.gridControl1;
this.gridView1.Name = "gridView1";
this.gridView1.OptionsView.AllowCellMerge = true;
this.gridView1.OptionsView.ShowFooter = true;
this.gridView1.OptionsView.ShowGroupPanel = false;
this.gridView1.SortInfo.AddRange(new DevExpress.XtraGrid.Columns.GridColumnSortInfo[] {
new DevExpress.XtraGrid.Columns.GridColumnSortInfo(this.colCompanyName, DevExpress.Data.ColumnSortOrder.Ascending)});
//
// colCompanyName
//
this.colCompanyName.Caption = "Company Name";
this.colCompanyName.FieldName = "Company Name";
this.colCompanyName.Name = "colCompanyName";
this.colCompanyName.OptionsColumn.ReadOnly = true;
this.colCompanyName.Summary.AddRange(new DevExpress.XtraGrid.GridSummaryItem[] {
new DevExpress.XtraGrid.GridColumnSummaryItem(DevExpress.Data.SummaryItemType.Count)});
this.colCompanyName.Visible = true;
this.colCompanyName.VisibleIndex = 0;
//
// XPView
//
this.XPView.Location = new System.Drawing.Point(12, 13);
this.XPView.Name = "XPView";
this.XPView.Size = new System.Drawing.Size(160, 37);
this.XPView.TabIndex = 1;
this.XPView.Text = "XPView";
this.XPView.UseVisualStyleBackColor = true;
this.XPView.Click += new System.EventHandler(this.LoadViaXPView);
//
// LINQ
//
this.LINQ.Location = new System.Drawing.Point(213, 13);
this.LINQ.Name = "LINQ";
this.LINQ.Size = new System.Drawing.Size(193, 37);
this.LINQ.TabIndex = 2;
this.LINQ.Text = "LINQ";
this.LINQ.UseVisualStyleBackColor = true;
this.LINQ.Click += new System.EventHandler(this.LoadViaLINQ);
//
// PersAlias
//
this.PersAlias.Location = new System.Drawing.Point(431, 13);
this.PersAlias.Name = "PersAlias";
this.PersAlias.Size = new System.Drawing.Size(170, 37);
this.PersAlias.TabIndex = 3;
this.PersAlias.Text = "PersistentAlias";
this.PersAlias.UseVisualStyleBackColor = true;
this.PersAlias.Click += new System.EventHandler(this.LoadDataWithPersistentAlias);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(613, 447);
this.Controls.Add(this.PersAlias);
this.Controls.Add(this.LINQ);
this.Controls.Add(this.XPView);
this.Controls.Add(this.gridControl1);
this.Name = "Form1";
this.Text = "Form1";
((System.ComponentModel.ISupportInitialize)(this.gridControl1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.gridView1)).EndInit();
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main() {
DevExpress.Xpo.XpoDefault.ConnectionString = DevExpress.Xpo.DB.MSSqlConnectionProvider.GetConnectionString(@".\SQLEXPRESS", "Northwind");
Application.Run(new Form1());
}
private void LoadViaXPView(object sender, EventArgs e) {
XPView xpView1 = new XPView(XpoDefault.Session, typeof(Northwind.Order));
xpView1.Properties.Add(new DevExpress.Xpo.ViewProperty("Company Name", DevExpress.Xpo.SortDirection.None, "[Customer.CompanyName]", true, true));
gridControl1.DataSource = xpView1;
RefreshColumns();
}
private void LoadViaLINQ(object sender, EventArgs e) {
gridControl1.DataSource = new XPQuery<Northwind.Order>(XpoDefault.Session).Select(s => s.Customer.CompanyName).Distinct();
RefreshColumns();
}
private void LoadDataWithPersistentAlias(object sender, EventArgs e) {
gridControl1.DataSource = new XPCollection<Northwind.Employee>();
RefreshColumns();
}
public void RefreshColumns() {
gridControl1.MainView.PopulateColumns();
gridView1.Columns[0].Summary.Add(DevExpress.Data.SummaryItemType.Count);
}
}
}