ここで何が起こっているのか理解できないようです...いつでも500行以下のdataGridViewがありますが、通常は200行または300行程度です。グリッドを反復処理し、ユーザーの操作に応じてボタンのテキストと色を設定します. 例:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
DataGridViewButtonColumn btn;
ContextMenuStrip ctxtStartStop;
public Form1()
{
InitializeComponent();
formatGrid();
populateGrid();
ctxtStartStop = new ContextMenuStrip();
ctxtStartStop.Items.Add("START ALL");
ctxtStartStop.Items.Add("STOP ALL");
ctxtStartStop.ItemClicked += new ToolStripItemClickedEventHandler(ctxtMenuStrip_ItemClicked);
}
private void formatGrid()
{
btn = new DataGridViewButtonColumn();
btn.Text = "START";
btn.Name = "colStartStop";
btn.HeaderText = "Start/Stop";
btn.DefaultCellStyle.BackColor = Color.LightGreen;
btn.DefaultCellStyle.ForeColor = Color.Black;
btn.ReadOnly = false;
btn.UseColumnTextForButtonValue = false;
btn.FlatStyle = FlatStyle.Standard;
btn.AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells;
gridDisplay.AutoGenerateColumns = false;
gridDisplay.AllowUserToAddRows = false;
gridDisplay.RowHeadersVisible = false;
gridDisplay.Columns.Add(new DataGridViewTextBoxColumn()
{
Name = "colSymbol",
HeaderText = "Symbols",
ReadOnly = true,
AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill,
MinimumWidth = 50
});
gridDisplay.Columns.Add(btn);
gridDisplay.MouseClick += new MouseEventHandler(gridDisplay_MouseClick);
}
private void populateGrid()
{
for (int i = 0; i < 500; i++)
{
gridDisplay.Rows.Add("XYZ", "START");
}
}
private void gridDisplay_MouseClick(object sender, MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Left)
return;
int rowPosition = gridDisplay.HitTest(e.X, e.Y).RowIndex;
int colPosition = gridDisplay.HitTest(e.X, e.Y).ColumnIndex;
if (rowPosition == -1 && colPosition == 1)
{
ctxtStartStop.Show(gridDisplay.PointToScreen(e.Location));
}
}
private void ctxtMenuStrip_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
{
if (e.ClickedItem.Text == "START ALL")
{
ctxtStartStop.Hide();
startAll();
}
else if (e.ClickedItem.Text == "STOP ALL")
{
ctxtStartStop.Hide();
stopAll();
}
}
private void startAll()
{
string action = string.Empty;
int idx = 1;
for (int i = 0; i < gridDisplay.Rows.Count; i++)
{
var btnCell = gridDisplay.Rows[i].Cells[idx];
action = (string)btnCell.Value;
if (action == "START")
{
btnCell.Value = "STOP";
gridDisplay.Rows[i].Cells["colStartStop"].Style.BackColor = Color.Red;
gridDisplay.Rows[i].Cells["colStartStop"].Style.ForeColor = Color.White;
}
}
}
private void stopAll()
{
string action = string.Empty;
int idx = 1;
for (int i = 0; i < gridDisplay.Rows.Count; i++)
{
var btnCell = gridDisplay.Rows[i].Cells[idx];
action = (string)btnCell.Value;
if (action == "STOP")
{
btnCell.Value = "START";
gridDisplay.Rows[i].Cells["colStartStop"].Style.BackColor = Color.LightGreen;
gridDisplay.Rows[i].Cells["colStartStop"].Style.ForeColor = Color.Black;
}
}
}
}
}
面白いことに、色の設定は正常に機能しますが、値を設定すると実行が非常に遅くなります。
誰かが私がここで間違っていることを説明してもらえますか?
ありがとう、-DA