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■No87482 (MTK さん) に返信
> 一番上のDataGridViewの１行目はチェックボックスセルになっており
> そのセルをチェックした時に、チェックが入った列（縦に並ぶ3つのDataGridViewを含む）を
> 入力不可になるように設定をしています。
その場合、チェックボックスセルは入力不可にしないのですよね。
using System;
using System.Drawing;
using System.Windows.Forms;
public partial class Form1 : Form
{
private DataGridView dgvTop, dgvMiddle, dgvBottom;
private readonly Color OddColorNormal = Color.PaleGoldenrod;
private readonly Color EvenColorNormal = Color.PowderBlue;
private readonly Color OddColorLocked = Color.Gainsboro;
private readonly Color EvenColorLocked = Color.DarkGray;
private readonly Color[] BackgroundColors;
private void dgv_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
// AlternatingRowsDefaultCellStyle に頼らず、自前で切り替え
if (e.ColumnIndex < 0 || e.RowIndex < 0) { return; }
if (sender == dgvTop && e.RowIndex == 0) { return; }
int index = (bool)dgvTop[e.ColumnIndex, 0].Value ? 2 : 0;
if (sender == dgvTop)
{
index += (e.RowIndex % 2 == 1) ? 0 : 1;
}
else
{
index += (e.RowIndex % 2 == 0) ? 0 : 1;
}
e.CellStyle.BackColor = BackgroundColors[index];
}
public Form1()
{
InitializeComponent();
BackgroundColors = new Color[] { OddColorNormal, EvenColorNormal, OddColorLocked, EvenColorLocked };
Controls.Clear();
Controls.Add(dgvMiddle = new DataGridView() { Dock = DockStyle.Fill, TabIndex = 1 });
Controls.Add(dgvTop = new DataGridView() { Dock = DockStyle.Top, TabIndex = 0 });
Controls.Add(dgvBottom = new DataGridView() { Dock = DockStyle.Bottom, TabIndex = 2 });
dgvTop.CellFormatting += dgv_CellFormatting;
dgvMiddle.CellFormatting += dgv_CellFormatting;
dgvBottom.CellFormatting += dgv_CellFormatting;
dgvTop.ColumnCount = dgvMiddle.ColumnCount = dgvBottom.ColumnCount = 8;
dgvTop.RowCount = dgvMiddle.RowCount = dgvBottom.RowCount = 50;
for (int c = 0; c < dgvTop.ColumnCount; c++)
{
dgvTop[c, 0] = new DataGridViewCheckBoxCell(false) {
TrueValue = true, FalseValue = false, Value = false,
Style = { Alignment = DataGridViewContentAlignment.MiddleCenter}
};
}
dgvTop.ColumnHeadersVisible = false;
dgvTop.Rows[0].DefaultCellStyle = new DataGridViewCellStyle() {
BackColor = SystemColors.Control,
SelectionBackColor = SystemColors.Control
};
dgvTop.CurrentCell = dgvTop[0, 1];
dgvTop.CurrentCellDirtyStateChanged += (sender, e) => {
var cell = dgvTop.CurrentCell as DataGridViewCheckBoxCell;
if (cell == null) { return; }
var dgv = (DataGridView)sender;
if (dgv.IsCurrentCellDirty) { dgv.CommitEdit(DataGridViewDataErrorContexts.Commit); }
bool isReadOnly = (cell.TrueValue == cell.Value);
int columnIndex = cell.ColumnIndex;
for (int r = 1 ; r < dgvTop.RowCount; r++)
{
dgvTop[columnIndex, r].ReadOnly = isReadOnly;
}
for (int r = 0; r < dgvMiddle.RowCount; r++)
{
dgvMiddle[columnIndex, r].ReadOnly = isReadOnly;
}
for (int r = 0; r < dgvBottom.RowCount; r++)
{
dgvBottom[columnIndex, r].ReadOnly = isReadOnly;
}
dgvTop.InvalidateColumn(columnIndex);
dgvMiddle.InvalidateColumn(columnIndex);
dgvBottom.InvalidateColumn(columnIndex);
};
}
}
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