Winform DataGridView添加列头checkbox

using System;
using System.Data;
using System.Drawing;
using System.Windows.Forms;
using Yanwen.Logistics.Business.Logics;
using Yanwen.Logistics.Business.Models.ExpressTransport;
using Yanwen.Logistics.Desktop.Extensions;namespace Yanwen.Logistics.Desktop.Transport
{
public partial class TransportLanshouForm : Form
{
public TransportLanshouForm()
{
InitializeComponent();
}
//显示行号
private void gdvData_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
{
var b = new SolidBrush(gdvData.RowHeadersDefaultCellStyle.ForeColor);
e.Graphics.DrawString((e.RowIndex + ).ToString(System.Globalization.CultureInfo.CurrentUICulture), gdvData.DefaultCellStyle.Font, b, e.RowBounds.Location.X + , e.RowBounds.Location.Y + );
}
private void TransportLanshouForm_Load(object sender, EventArgs e)
{
var ch = new DatagridviewCheckboxHeaderCell();
ch.OnCheckBoxClicked += new DatagridviewcheckboxHeaderEventHander(ch_OnCheckBoxClicked);//关联单击事件
var checkboxCol = this.gdvData.Columns[] as DataGridViewCheckBoxColumn;
checkboxCol.HeaderCell = ch;
checkboxCol.HeaderCell.Value = string.Empty;//消除列头checkbox旁出现的文字
} /// <summary>
/// 单击事件
/// </summary>
private void ch_OnCheckBoxClicked(object sender, DatagridviewCheckboxHeaderEventArgs e)
{
foreach (DataGridViewRow dgvRow in this.gdvData.Rows)
{
dgvRow.Cells[].Value = e.CheckedState;
}
}
} //定义触发单击事件的委托
public delegate void DatagridviewcheckboxHeaderEventHander(object sender, DatagridviewCheckboxHeaderEventArgs e); //定义包含列头checkbox选择状态的参数类
public class DatagridviewCheckboxHeaderEventArgs : EventArgs
{
public DatagridviewCheckboxHeaderEventArgs()
{
CheckedState = false;
} public bool CheckedState { get; set; }
} //定义继承于DataGridViewColumnHeaderCell的类，用于绘制checkbox，定义checkbox鼠标单击事件
class DatagridviewCheckboxHeaderCell : DataGridViewColumnHeaderCell
{
Point checkBoxLocation;
Size checkBoxSize;
bool _checked = false;
Point _cellLocation = new Point();
System.Windows.Forms.VisualStyles.CheckBoxState _cbState =
System.Windows.Forms.VisualStyles.CheckBoxState.UncheckedNormal;
public event DatagridviewcheckboxHeaderEventHander OnCheckBoxClicked; //绘制列头checkbox
protected override void Paint(System.Drawing.Graphics graphics,
System.Drawing.Rectangle clipBounds,
System.Drawing.Rectangle cellBounds,
int rowIndex,
DataGridViewElementStates dataGridViewElementState,
object value,
object formattedValue,
string errorText,
DataGridViewCellStyle cellStyle,
DataGridViewAdvancedBorderStyle advancedBorderStyle,
DataGridViewPaintParts paintParts)
{
base.Paint(graphics, clipBounds, cellBounds, rowIndex,
dataGridViewElementState, value,
formattedValue, errorText, cellStyle,
advancedBorderStyle, paintParts);
Point p = new Point();
Size s = CheckBoxRenderer.GetGlyphSize(graphics,
System.Windows.Forms.VisualStyles.CheckBoxState.UncheckedNormal);
p.X = cellBounds.Location.X +
(cellBounds.Width / ) - (s.Width / ) - ;//列头checkbox的X坐标
p.Y = cellBounds.Location.Y +
(cellBounds.Height / ) - (s.Height / );//列头checkbox的Y坐标
_cellLocation = cellBounds.Location;
checkBoxLocation = p;
checkBoxSize = s;
if (_checked)
_cbState = System.Windows.Forms.VisualStyles.
CheckBoxState.CheckedNormal;
else
_cbState = System.Windows.Forms.VisualStyles.
CheckBoxState.UncheckedNormal;
CheckBoxRenderer.DrawCheckBox
(graphics, checkBoxLocation, _cbState);
} /// <summary>
/// 点击列头checkbox单击事件
/// </summary>
protected override void OnMouseClick(DataGridViewCellMouseEventArgs e)
{ var p = new Point(e.X + _cellLocation.X, e.Y + _cellLocation.Y);
if (p.X >= checkBoxLocation.X && p.X <= checkBoxLocation.X + checkBoxSize.Width
&& p.Y >= checkBoxLocation.Y && p.Y <= checkBoxLocation.Y + checkBoxSize.Height)
{
_checked = !_checked; //获取列头checkbox的选择状态
var ex = new DatagridviewCheckboxHeaderEventArgs { CheckedState = _checked }; var sender = new object();//此处不代表选择的列头checkbox，只是作为参数传递。应该列头checkbox是绘制出来的，无法获得它的实例
if (OnCheckBoxClicked != null)
{
OnCheckBoxClicked(sender, ex);//触发单击事件
this.DataGridView.InvalidateCell(this);
}
}
base.OnMouseClick(e);
} }}