cscの作法 その443

概要

cscの作法、調べてみた。
練習問題、やってみた。

練習問題

ComboBoxを配列で扱え。

方針

• new ComboBox[5]する。

写真

サンプルコード

using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
using System.Data;

namespace App
{
	public partial class Form1: Form {
		ComboBox[] comboBoxs;
		public Form1() {
			Text = "ComboBox";
			ClientSize = new Size(300, 300);
			DataTable dt = new DataTable();
			dt.Columns.AddRange(new DataColumn[] {
				new DataColumn("ID", typeof(int)),
				new DataColumn("Obj", typeof(string))
			});
			dt.Rows.Add(0, "");
			dt.Rows.Add(1, "バナナ");
			dt.Rows.Add(2, "マンゴー");
			dt.Rows.Add(3, "パパイア");
			dt.Rows.Add(4, "キウイ");
			comboBoxs = new ComboBox[5];
			for (int i = 0; i < this.comboBoxs.Length; i++)
			{
				comboBoxs[i] = new ComboBox();
				comboBoxs[i].Name = "ComboBox" + i.ToString();
				comboBoxs[i].Location = new Point(30, 10 + 30 * i);
				comboBoxs[i].DataSource = new BindingSource(dt, null);
				comboBoxs[i].DisplayMember = "Obj";
				comboBoxs[i].ValueMember = "ID";
				comboBoxs[i].SelectedIndex = -1;
			}
			Controls.AddRange(this.comboBoxs);
			Button button1 = new Button();
			button1.Location = new Point(100, 250);
			button1.Text = "test";
			button1.Click += new EventHandler(button1_Click);
			this.Controls.Add(button1);
		}
		private void button1_Click(object sender, EventArgs e) {
			string str = "0: " + comboBoxs[0].Text + " 1: " + comboBoxs[1].Text + " 2: " + comboBoxs[2].Text + " 3: " + comboBoxs[3].Text + " 4: " + comboBoxs[4].Text;
			MessageBox.Show(str);
		}
		[STAThread]
		public static void Main() {
			Application.Run(new Form1());
		}
	}
}

以上。