C#小知識

MessageBoxIconのいくつかの使い方.(全てButtonでテスト)

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace MessageBoxICon
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void ButY N_Click(object sender, EventArgs e)
        {
            MessageBox.Show(" ", " ", MessageBoxButtons.YesNo);
        }

        private void ButCancel_Click(object sender, EventArgs e)
        {
            MessageBox.Show(" ", " ", MessageBoxButtons.OKCancel);
        }

        private void Button3_Click(object sender, EventArgs e)
        {
            MessageBox.Show(" ", " ", MessageBoxButtons.YesNoCancel);
        }

        private void ButPic_Click(object sender, EventArgs e)
        {
            MessageBox.Show(" ", " ", MessageBoxButtons.YesNoCancel,MessageBoxIcon.Error);
        }

        private void ButWar_Click(object sender, EventArgs e)
        {
            MessageBox.Show(" ", " ", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Warning);
        }

        private void Button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show(" ", " ", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Information);
        }

        private void Button1_Click_1(object sender, EventArgs e)
        {
            MessageBox.Show(" ", " ", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Exclamation);
        }

        private void Button2_Click(object sender, EventArgs e)
        {
            MessageBox.Show(" ", " ", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);

        }

        private void Button3_Click_1(object sender, EventArgs e)
        {
            MessageBox.Show(" ", " ", MessageBoxButtons.YesNoCancel, MessageBoxIcon.None);
        }
    }
}

DialogResultの使い方. 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace TheValueOfMessageBox
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void ButtHel_Click(object sender, EventArgs e)
        {
            DialogResult result;
            result = MessageBox.Show(" ？", " ", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
            if(result ==DialogResult.Yes)
            {
                MessageBox.Show(" ， ！");
            }
            else if(result == DialogResult.No)
            {
                MessageBox.Show(" ？ ？ ， 。");
            }
            else if(result == DialogResult.Cancel)
            {
                MessageBox.Show(" ， ， ， 。");
            }
        }
    }
}