int i = 0;
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == (char)Keys.Enter)
{
int b = 0;
if (int.TryParse(textBox1.Text, out b) == true) //判斷是否可以轉換為整型數字
{
i++;
int num = Convert.ToInt32(textBox1.Text);
label1.Text = i.ToString();
if (num % 2 == 0)
{
if (num % 5 != 0)
{
textBox2.Text = textBox2.Text + num.ToString() + "\r\n"; //輸出
}
}
if (i == 100)
{
MessageBox.Show("輸入的數字達到100！", "提示", MessageBoxButtons.OK , MessageBoxIcon.Information);
}
}
else
{
MessageBox.Show("輸入的不是整數！", "提示", MessageBoxButtons.OK , MessageBoxIcon.Information);
}
textBox1.Text = "";
}
}