GridControl.MainView Property
Gets or sets the View that displays data at the top hierarchy level.
Namespace: DevExpress.XtraGrid
Assembly: DevExpress.XtraGrid.v24.2.dll
Declaration
Property Value
| Type | Default | Description |
|---|---|---|
| BaseView | null | A BaseView descendant representing the View that displays data at the top hierarchy level. |
Remarks
When the grid control doesn’t display master-detail data, the View specified by the MainView property is the only View that displays data. By default, when the grid control is created, it initializes the MainView property with a GridView object with default settings. Thus, if you need to display data using a Card View, create a new CardView object and assign it to the MainView property.
When using the grid control to display master-detail relationships, the MainView property specifies the View that will represent the top level data. This is the data specified by the grid control’s GridControl.DataSource and GridControl.DataMember properties. Detail data is represented by Views stored within the GridControl.LevelTree tree or supplied by the master View’s GridView.MasterRowGetLevelDefaultView event handler.
All Views currently displayed are stored within the GridControl.Views collection. The first element in the collection is the MainView property value. Other elements are added or removed dynamically when detail clones are expanded and collapsed respectively.
Note
Do not set the MainView property while wrapping the setter with the GridControl.BeginUpdate and GridControl.EndUpdate method pair. Instead, set the MainView property outside the BeginUpdate/EndUpdate block.
Example
The following example creates a GridControl at runtime and shows how to perform basic customization tasks:
- Bind the grid to a data source
- Access the View that displays the underlying data
- Access columns
- Assign an in-place editor (a combo box editor) to a column
- Sort and group data
- Calculate total and group summaries
- Create a filter
- Hide columns and calculate column “best” widths
- Expand group rows
- Focus a specific cell
- Specify DataAnnotation attributes (column display names and data formats) at the data source level
Note
Add the corresponding assemblies to your Windows Forms project.
Read the following topic for information: Redistribution and Deployment of .NET Framework Apps.
using System;
using DevExpress.ClipboardSource.SpreadsheetML;
using DevExpress.Data;
using DevExpress.XtraEditors;
using DevExpress.XtraEditors.Repository;
using DevExpress.XtraGrid;
using DevExpress.XtraGrid.Columns;
using DevExpress.XtraGrid.Views.Grid;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Runtime.CompilerServices;
using System.Windows.Forms;
namespace DXApplication {
public partial class Form1 : XtraForm {
public Form1() {
InitializeComponent();
this.Load += Form1_Load;
}
private void Form1_Load(object sender, EventArgs e) {
GridControl gridControl1 = new GridControl() {
Name = "gridControl1",
Parent = this,
Dock = DockStyle.Fill
};
gridControl1.DataSource = DataHelper.GetData(30);
// The grid automatically creates columns for the public fields found in the data source.
// Calling the gridView1.PopulateColumns method is not required unless gridView1.OptionsBehavior.AutoPopulateColumns is disabled.
// The grid automatically creates a GridView that displays the underlying data as a two-dimensional table.
GridView gridView1 = gridControl1.MainView as GridView;
// Obtain created columns.
GridColumn colCompany = gridView1.Columns["CompanyName"];
GridColumn colID = gridView1.Columns["ID"];
GridColumn colDate = gridView1.Columns["RequiredDate"];
GridColumn colPayment = gridView1.Columns["Value"];
GridColumn colProcessed = gridView1.Columns["Processed"];
// The Company column uses a ComboBox in-place editor that shows a list of available companies.
RepositoryItemComboBox riComboBox = new RepositoryItemComboBox();
riComboBox.Items.AddRange(DataHelper.companies);
gridControl1.RepositoryItems.Add(riComboBox);
colCompany.ColumnEdit = riComboBox;
// Hide a column.
colID.Visible = false;
// Group and sort data.
colCompany.GroupIndex = 0;
colDate.SortIndex = 0;
colDate.SortOrder = DevExpress.Data.ColumnSortOrder.Descending;
// Show group columns in the table.
gridView1.OptionsView.ShowGroupedColumns = true;
// Expand group rows.
gridView1.ExpandAllGroups();
// Apply a filter.
gridView1.ActiveFilterString = "[RequiredDate]>= #" + DateTime.Today.ToString() + "#";
// Calculate two total summaries.
colDate.Summary.Add(SummaryItemType.Count, colDate.FieldName, "Count={0}");
colDate.Summary.Add(SummaryItemType.Max, colDate.FieldName, "Max={0:d}");
gridView1.OptionsView.ShowFooter = true;
// Calculate group summaries.
GridGroupSummaryItem item = new GridGroupSummaryItem();
item.FieldName = colCompany.FieldName;
item.SummaryType = DevExpress.Data.SummaryItemType.Count;
gridView1.GroupSummary.Add(item);
GridGroupSummaryItem item1 = new GridGroupSummaryItem();
item1.FieldName = colPayment.FieldName;
item1.SummaryType = SummaryItemType.Sum;
item1.DisplayFormat = "group total={0:c2}";
item1.ShowInGroupColumnFooter = colPayment;
gridView1.GroupSummary.Add(item1);
// Forcibly move group footer summaries to positions in group rows under corresponding column headers.
gridView1.OptionsBehavior.AlignGroupSummaryInGroupRow = DevExpress.Utils.DefaultBoolean.True;
// Focus a specific cell.
gridView1.FocusedRowHandle = 1;
gridView1.FocusedColumn = colCompany;
// Optimize column widths.
colDate.BestFit();
colProcessed.BestFit();
}
}
public class Record : INotifyPropertyChanged {
public Record() {
}
int id;
public int ID {
get { return id; }
set {
if(id != value) {
id = value;
OnPropertyChanged();
}
}
}
string text;
[DisplayName("Company")]
public string CompanyName {
get { return text; }
set {
if(text != value) {
if(string.IsNullOrEmpty(value))
throw new Exception();
text = value;
OnPropertyChanged();
}
}
}
Nullable<decimal> val;
[DataType(System.ComponentModel.DataAnnotations.DataType.Currency)]
[DisplayName("Payment")]
public Nullable<decimal> Value {
get { return val; }
set {
if(val != value) {
val = value;
OnPropertyChanged();
}
}
}
DateTime dt;
[DisplayFormat(DataFormatString = "d")]
public DateTime RequiredDate {
get { return dt; }
set {
if(dt != value) {
dt = value;
OnPropertyChanged();
}
}
}
bool state;
public bool Processed {
get { return state; }
set {
if(state != value) {
state = value;
OnPropertyChanged();
}
}
}
public override string ToString() {
return string.Format("ID = {0}, Text = {1}", ID, CompanyName);
}
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged([CallerMemberName] string propertyName = "") {
if(PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
public class DataHelper {
public static string[] companies = new string[] { "Hanari Carnes", "Que Delícia", "Romero y tomillo", "Mère Paillarde",
"Comércio Mineiro", "Reggiani Caseifici", "Maison Dewey" };
public static BindingList<Record> GetData(int count) {
BindingList<Record> records = new BindingList<Record>();
Random rnd = new Random();
for(int i = 0; i < count; i++) {
int n = rnd.Next(10);
records.Add(new Record() {
ID = i + 100,
CompanyName = companies[i % companies.Length],
RequiredDate = DateTime.Today.AddDays(n - 5),
Value = i % 2 == 0 ? (i + 1) * 123 : i * 231,
Processed = i % 2 == 0,
});
};
return records;
}
}
}
Related GitHub Examples
The following code snippets (auto-collected from DevExpress Examples) contain references to the MainView property.
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.