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DataGridView key points
Class generator for DataGridView => A class for simplify Databinding.
DataGridView use SelectionChanges(...) for row selection.
DataGridViewComboBoxColumn =>
- DataSource = object;
- DisplayMember = "";
- ValueMember = "";
- DataPropertyName = "";
DataGridViewColumn custom is complex, especially RadioButtons.
Custom Columns:
- Nullable DateTimePicker -> allow empty/null value for datasource.
- RadioButtoms -> List of radioButtons vertically listed.
Custom Method => How to: Host Controls in Windows Forms DataGridView Cells
http://msdn.microsoft.com/en-us/library/vstudio/7tas5c80(v=vs.100).aspx
http://msdn.microsoft.com/en-US/library/aa730881(v=vs.80).aspx
Error Display => Cell.ErrorTet; Row.ErrorText
using System;using System.Windows.Forms;public class CalendarColumn : DataGridViewColumn{ public CalendarColumn() : base(new CalendarCell()) { } public override DataGridViewCell CellTemplate { get { return base.CellTemplate; } set { // Ensure that the cell used for the template is a CalendarCell. if (value != null && !value.GetType().IsAssignableFrom(typeof(CalendarCell))) { throw new InvalidCastException("Must be a CalendarCell"); } base.CellTemplate = value; } }}public class CalendarCell : DataGridViewTextBoxCell{ public CalendarCell() : base() { // Use the short date format. this.Style.Format = "d"; } public override void InitializeEditingControl(int rowIndex, object initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle) { // Set the value of the editing control to the current cell value. base.InitializeEditingControl(rowIndex, initialFormattedValue, dataGridViewCellStyle); CalendarEditingControl ctl = DataGridView.EditingControl as CalendarEditingControl; // Use the default row value when Value property is null. if (this.Value =http://www.mamicode.com/= null) { ctl.Value = (DateTime)this.DefaultNewRowValue; } else { ctl.Value = (DateTime)this.Value; } } public override Type EditType { get { // Return the type of the editing control that CalendarCell uses. return typeof(CalendarEditingControl); } } public override Type ValueType { get { // Return the type of the value that CalendarCell contains. return typeof(DateTime); } } public override object DefaultNewRowValue { get { // Use the current date and time as the default value. return DateTime.Now; } }}class CalendarEditingControl : DateTimePicker, IDataGridViewEditingControl{ DataGridView dataGridView; private bool valueChanged = false; int rowIndex; public CalendarEditingControl() { this.Format = DateTimePickerFormat.Short; } // Implements the IDataGridViewEditingControl.EditingControlFormattedValue // property. public object EditingControlFormattedValue { get { return this.Value.ToShortDateString(); } set { if (value is String) { try { // This will throw an exception of the string is // null, empty, or not in the format of a date. this.Value =http://www.mamicode.com/ DateTime.Parse((String)value); } catch { // In the case of an exception, just use the // default value so we‘re not left with a null // value. this.Value =http://www.mamicode.com/ DateTime.Now; } } } } // Implements the // IDataGridViewEditingControl.GetEditingControlFormattedValue method. public object GetEditingControlFormattedValue( DataGridViewDataErrorContexts context) { return EditingControlFormattedValue; } // Implements the // IDataGridViewEditingControl.ApplyCellStyleToEditingControl method. public void ApplyCellStyleToEditingControl( DataGridViewCellStyle dataGridViewCellStyle) { this.Font = dataGridViewCellStyle.Font; this.CalendarForeColor = dataGridViewCellStyle.ForeColor; this.CalendarMonthBackground = dataGridViewCellStyle.BackColor; } // Implements the IDataGridViewEditingControl.EditingControlRowIndex // property. public int EditingControlRowIndex { get { return rowIndex; } set { rowIndex = value; } } // Implements the IDataGridViewEditingControl.EditingControlWantsInputKey // method. public bool EditingControlWantsInputKey( Keys key, bool dataGridViewWantsInputKey) { // Let the DateTimePicker handle the keys listed. switch (key & Keys.KeyCode) { case Keys.Left: case Keys.Up: case Keys.Down: case Keys.Right: case Keys.Home: case Keys.End: case Keys.PageDown: case Keys.PageUp: return true; default: return !dataGridViewWantsInputKey; } } // Implements the IDataGridViewEditingControl.PrepareEditingControlForEdit // method. public void PrepareEditingControlForEdit(bool selectAll) { // No preparation needs to be done. } // Implements the IDataGridViewEditingControl // .RepositionEditingControlOnValueChange property. public bool RepositionEditingControlOnValueChange { get { return false; } } // Implements the IDataGridViewEditingControl // .EditingControlDataGridView property. public DataGridView EditingControlDataGridView { get { return dataGridView; } set { dataGridView = value; } } // Implements the IDataGridViewEditingControl // .EditingControlValueChanged property. public bool EditingControlValueChanged { get { return valueChanged; } set { valueChanged = value; } } // Implements the IDataGridViewEditingControl // .EditingPanelCursor property. public Cursor EditingPanelCursor { get { return base.Cursor; } } protected override void OnValueChanged(EventArgs eventargs) { // Notify the DataGridView that the contents of the cell // have changed. valueChanged = true; this.EditingControlDataGridView.NotifyCurrentCellDirty(true); base.OnValueChanged(eventargs); }}public class Form1 : Form{ private DataGridView dataGridView1 = new DataGridView(); [STAThreadAttribute()] public static void Main() { Application.Run(new Form1()); } public Form1() { this.dataGridView1.Dock = DockStyle.Fill; this.Controls.Add(this.dataGridView1); this.Load += new EventHandler(Form1_Load); this.Text = "DataGridView calendar column demo"; } private void Form1_Load(object sender, EventArgs e) { CalendarColumn col = new CalendarColumn(); this.dataGridView1.Columns.Add(col); this.dataGridView1.RowCount = 5; foreach (DataGridViewRow row in this.dataGridView1.Rows) { row.Cells[0].Value =http://www.mamicode.com/ DateTime.Now; } }}
You can add a CheckBox into the DataGridView, and make it stay on the column header cell by setting its location, handle its CheckedChanged event to make all the DataGridViewCheckBox cells with the same status as the CheckBox on the header cell, something like this:
public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { c1 = new DataGridViewCheckBoxColumn(); c1.Name = "selection"; c1.HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleCenter; this.dataGridView1.Columns.Add(c1); this.dataGridView1.Rows.Add(); this.dataGridView1.Rows.Add(); this.dataGridView1.Rows.Add(); this.dataGridView1.Rows.Add(); ckBox = new CheckBox(); //Get the column header cell bounds Rectangle rect = this.dataGridView1.GetCellDisplayRectangle(0, -1, true); ckBox.Size = new Size(18, 18); //Change the location of the CheckBox to make it stay on the header ckBox.Location = rect.Location; ckBox.CheckedChanged += new EventHandler(ckBox_CheckedChanged); //Add the CheckBox into the DataGridView this.dataGridView1.Controls.Add(ckBox); } DataGridViewCheckBoxColumn c1; CheckBox ckBox; void ckBox_CheckedChanged(object sender, EventArgs e) { for (int j = 0; j < this.dataGridView1.RowCount; j++) { this.dataGridView1[0, j].Value = http://www.mamicode.com/this.ckBox.Checked; } this.dataGridView1.EndEdit(); } }
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