DataGridView自定义列标题内容（复选框控件） [英] DataGridView custom column header content (checkbox control)

问题描述

可以向WinForms添加功能全部检查DataGridView 的DataGridViewCheckBoxColumn ？

Is it possible to add functionality "check all" to WinForms DataGridView's DataGridViewCheckBoxColumn?

它应该如下所示：

点击highlited复选框应该检查/取消选中网格中的所有复选框。

Click on highlited checkbox should check/uncheck all checkboxes in the grid.

如我所见，列标题只能包含字符串值。有没有解决方法？

As I can see, column header can contain only string values. Is there any workaround?

推荐答案

最终实现主要是解决方案，由Samir在这篇文章。

Final implementation is mostly solution, proposed by Samir in this article.

但是当网格水平滚动条移动时，它需要修复复选框位置。所以这里需要修改的方法：

But it requires fix of checkbox position when grid horizontal scrollbar is moving. So here follows methods that needed to be changed:

private void frmSelectAll_Load(object sender, EventArgs e)
{
    AddHeaderCheckBox();

    HeaderCheckBox.KeyUp += new KeyEventHandler(HeaderCheckBox_KeyUp);
    HeaderCheckBox.MouseClick += new MouseEventHandler(HeaderCheckBox_MouseClick);
    dgvSelectAll.CellValueChanged += new DataGridViewCellEventHandler(dgvSelectAll_CellValueChanged);
    dgvSelectAll.CurrentCellDirtyStateChanged += new EventHandler(dgvSelectAll_CurrentCellDirtyStateChanged);
    dgvSelectAll.CellPainting += new DataGridViewCellPaintingEventHandler(dgvSelectAll_CellPainting);

    BindGridView();

    var checkboxHeaderCellRect = dgvSelectAll.GetCellDisplayRectangle(0, -1, false);
    headerCheckboxRightMargin = (checkboxHeaderCellRect.Width - HeaderCheckBox.Width)/2;
}

private int headerCheckboxRightMargin;

private void ResetHeaderCheckBoxLocation(int ColumnIndex, int RowIndex)
{
    //Get the column header cell bounds
    Rectangle oRectangle = this.dgvSelectAll.GetCellDisplayRectangle(ColumnIndex, RowIndex, false);

    Point oPoint = new Point();

    oPoint.X = oRectangle.Location.X + (oRectangle.Width - headerCheckboxRightMargin - HeaderCheckBox.Width);
    oPoint.Y = oRectangle.Location.Y + (oRectangle.Height - HeaderCheckBox.Height) / 2 + 1;

    if (oPoint.X < oRectangle.X)
    {
        HeaderCheckBox.Visible = false;
    }
    else
    {
        HeaderCheckBox.Visible = true;
    }

    //Change the location of the CheckBox to make it stay on the header
    HeaderCheckBox.Location = oPoint;
}

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