最近，在做CS程序遇到一个头疼的问题，datagridview列表的全选按钮遇到各种问题，做的是自适应窗体大小，当窗体最大化导致全选按钮出现与列表数据不一致，特别不搭配，试了很久，网上也找了好多资料各种试最终还是解决了这个问题，具体实现的方法详见下面代码
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms; namespace BMIS.POS
{
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);
}
}
}
这个类是创建全选按钮的类方法，然后在窗体的初始事件调用，我这里 以我的datagridview 名称为 dgvPackList 为例，在实际使用的时候名称统一换一下，在列表上就不需要添加CheckBox列，会自动创建的，至此，绑定完数据运行即可看到效果了。当遇到一些错误的时候需要添加一个dataerror的事件，可以什么都不用写，保留这个事件就可以了；
private void cbHeader_OnCheckBoxClicked(bool state)
{
//这一句很重要结束编辑状态
dgvPackList.EndEdit();
dgvPackList.Rows.OfType<DataGridViewRow>().ToList().ForEach(t => t.Cells[0].Value = state);
} private void InitColumnInfo()
{
int index = 0; DataGridViewCheckBoxColumn colCB = new DataGridViewCheckBoxColumn();
DatagridViewCheckBoxHeaderCell cbHeader = new DatagridViewCheckBoxHeaderCell();
colCB.HeaderCell = cbHeader;
colCB.HeaderText = "";
colCB.FillWeight = 50;
cbHeader.OnCheckBoxClicked += new CheckBoxClickedHandler(cbHeader_OnCheckBoxClicked);
dgvPackList.Columns.Insert(index, colCB); 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;
dgvPackList.Columns[index].DefaultCellStyle = dataGridViewCellStyle2;
}