这是类的代码:
public delegate void CheckBoxClickedHandler(bool state);
public class DataGridViewCheckBoxHeaderCellEventArgs : EventArgs
{
bool _bChecked;
public DataGridViewCheckBoxHeaderCellEventArgs(bool bChecked)
{
_bChecked = bChecked;
}
public bool Checked
{
get { return _bChecked; }
}
}
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 CheckBoxClickedHandler OnCheckBoxClicked;
public DatagridViewCheckBoxHeaderCell()
{
}
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 / 2) - (s.Width / 2) ;
p.Y = cellBounds.Location.Y +
(cellBounds.Height / 2) - (s.Height / 2);
_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);
}
protected override void OnMouseClick(DataGridViewCellMouseEventArgs e)
{
Point 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;
if (OnCheckBoxClicked != null)
{
OnCheckBoxClicked(_checked);
this.DataGridView.InvalidateCell(this);
}
}
base.OnMouseClick(e);
}
}
DataGridViewCheckBoxColumn will be added to the column header after instantiation. colCB = new DataGridViewCheckBoxColumn();
DatagridViewCheckBoxHeaderCell cbHeader = new DatagridViewCheckBoxHeaderCell();
colCB.HeaderCell = cbHeader;
datagridview1.Columns.Add(colCB);
cbedHeader (NewCheckBoxClickHandler) cbHeader_OnCheckBoxClicked);
1. We only need to define a DataGridViewCheckBoxColumn.
2. Then define a CheckboxClicked event for the checkbox of each row.
Test program
to create a Winform project, add a datagridview control, several lines default initialization data. Note: datagirdview has editing status, if there is a row of data in editing status, then this row is edited.
The solution is to add an EndEdit() call in the event binding method.
public partial class Form1: Form
{
public Form1()
{
InitializeComponent();
InitDtSource();
}
private void cbHeader_OnCheckBoxClicked(bool state)
{
//这一句很重要结束编辑状态
dgInfo.EndEdit();
dgInfo.Rows.OfType<DataGridViewRow>().ToList().ForEach(t => t.Cells[0].Value = state);
}
private void InitDtSource()
{
try
{
var _dtSource = new DataTable();
//1、添加列
_dtSource.Columns.Add("姓名", typeof(string)); //数据类型为 文本
_dtSource.Columns.Add("身份证号", typeof(string)); //数据类型为 文本
_dtSource.Columns.Add("时间", typeof(string)); //数据类型为 文本
_dtSource.Columns.Add("地点", typeof(string)); //数据类型为 文本
for (int i = 0; i < 10; i++)
{
DataRow drData = _dtSource.NewRow();
drData[0] = "test" + i;
drData[1] = "35412549554521263" + i;
drData[2] = "2017-05-21 10:55:21";
drData[3] = "北京市";
_dtSource.Rows.Add(drData);
}
dgInfo.DataSource = _dtSource;
InitColumnInfo();
}
catch (Exception ex)
{
}
}
private void InitColumnInfo()
{
int index = 0;
DataGridViewCheckBoxColumn colCB = new DataGridViewCheckBoxColumn();
DatagridViewCheckBoxHeaderCell cbHeader = new DatagridViewCheckBoxHeaderCell();
colCB.HeaderCell = cbHeader;
colCB.HeaderText = "全选";
cbHeader.OnCheckBoxClicked += new CheckBoxClickedHandler(cbHeader_OnCheckBoxClicked);
dgInfo.Columns.Insert(index, colCB);
index++;
dgInfo.Columns[index].HeaderText = "姓名";
dgInfo.Columns[index].Width = 90;
index++;
dgInfo.Columns[index].HeaderText = "身份证号";
dgInfo.Columns[index].Width = 120;
index++;
dgInfo.Columns[index].HeaderText = "时间";
dgInfo.Columns[index].Width = 150;
index++;
dgInfo.Columns[index].HeaderText = "地点";
dgInfo.Columns[index].Width = 100;
System.Windows.Forms.DataGridViewCellStyle dataGridViewCellStyle2 = new System.Windows.Forms.DataGridViewCellStyle();
dataGridViewCellStyle2.Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleCenter;//211, 223, 240
dataGridViewCellStyle2.ForeColor = System.Drawing.Color.Blue;
dataGridViewCellStyle2.SelectionForeColor = System.Drawing.Color.Blue;
dgInfo.Columns[index].DefaultCellStyle = dataGridViewCellStyle2;
}
}
Reprinting place: https://www.cnblogs.com/zhangweizhong/p/6885507.html
Program downloading place: https://download.csdn.net/download/hello_mr_anan/10629149
Pro-test available