使用MaskedTextBox控件实现输入验证

        private void Form1_Load(object sender, EventArgs e)
        {
            this.maskedTextBox1.Mask = "000000-00000000-000A";
            this.maskedTextBox2.Mask = "000000-000000-000";
            this.maskedTextBox3.Mask = "000000";
            this.maskedTextBox4.Mask = "0000年90月90日";
        }

        private void maskedTextBox4_MaskInputRejected(object sender, MaskInputRejectedEventArgs e)
        {
            MessageBox.Show("格式输入有误 请重试","提示",
                MessageBoxButtons.OK,MessageBoxIcon.Information);
        }