C#用正则表达式验证格式：电话号码、密码、邮编、手机号码、身份证、指定的小数点后位数、有效月

        正则表达式在程序设计中有着重要的位置，经常被用于处理字符串信息。

        用Regex类的IsMatch方法，使用正则表达式可以验证电话号码是否合法。

一、涉及到的知识点

        Regex类的IsMatch方法用于指示正则表达式使用pattern参数中指定的正则表达式是否在输入字符串中找到匹配项。语法格式如下：

public static bool IsMatch(string input,string patterm)

参数说明
Input：字符串对象，表示要搜索匹配项的字符串。
Pattern：字符串对象，表示要匹配的正则表达式模式。
Bool：返回布尔值，如果正则表达式找到匹配项，则返回值为true，否则返回值为false。

        其中，正则表达式中匹配位置的元字符“^”。正则表达式中“^”用于匹配行首，如果正则表达式匹配以First开头的行，则正则表达式如下：^First。

        如果电话号码的格式：xxx-xxxxxxxx，其中，x—代表数字，那么匹配的正则表达式是：^(\d{3,4}-)?\d{6,8}$。

        如果密码有a-z、A-Z、0-9组成，并且至少一个大小写字母和数字，那么其正则表达式：[A-Za-z]+[0-9]；

        如果密码有a-z、A-Z、0-9组成，并且至少一个大小写字母或数字，那么其正则表达式：[A-Za-z0-9]+，其中+有没有都可以；

        如果把正则表达式改为[A-Z]+[a-z]+[0-9]，就变成依次至少一个大写、一个小写、一个数字了，打乱了顺序都不行。

        由6位数字组成的邮编的正则表达式：^\d{6}$；

        手机号码由11位数字组成，以1开头、第二位数字为3，4，5，6，7，8，9中一个、第三位到十一位数字为0到9的任意一个数字，其正则表达式：^1[3-9]\d{9}$；

        18位身份号码是特征组合码，由十七位数字本体码和一位校验码组成。排列顺序从左至右依次为：六位数字地址码，八位数字出生日期码，三位数字顺序码和一位校验码。其中：

• 地址码：表示编码对象常住户口所在县(市、旗、区)的行政区划代码，按GB/T2260的规定执行。其中前两位为省份编码。
• 出生日期码：表示编码对象出生的年、月、日，按GB/T7408的规定执行，格式如20240130，之间不用分隔符。
• 顺序码：表示在同一地址码所标识的区域范围内，对同年、同月、同日出生的人编定的顺序号，顺序码的奇数分配给男性，偶数分配给女性。
• 校验码计算方式：

        （1）对前17位数字本体码加权求和公式为：S = Sum(Ai * Wi), i = 1, ... , 17。其中Ai表示第i位置上的身份证号码数值；Wi表示第i位置上的加权因子，按位置依次为：7 9 10 5 8 4 2 1 6 3 7 9 10 5 8 4 2；
        （2）以11对计算结果取模：Y = mod(S, 11)；
        （3）根据模的值得到对应的校验码，对应关系为：
             Y值：0 1 2 3 4 5 6 7 8 9 10
        校验码：1 0 X 9 8 7 6 5 4 3 2

        身份证号正则表达式：

//闰年
^[1-9]\d{5}(19|20)\d{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2]\d|3[0-1])|(04|06|09|11)(0[1-9]|[1-2]\d|30)|02(0[1-9]|[1-2]\d))\d{3}[\dXx]$
//平年
^[1-9]\d{5}(19|20)\d{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2]\d|3[0-1])|(04|06|09|11)(0[1-9]|[1-2]\d|30)|02(0[1-9]|1\d|2[0-8]))\d{3}[\dXx]$

         用正则表达式可以校验指定小数点后的位数是否匹配，比如验证小数点后位数是否2位的正则表达式：^[0-9]+(.\d{2})?$，^[0-9]+.\d{2}$，^[0-9]+\.\d{2}$，^[0-9]+\.[0-9]{2}$；

        验证输入的数值是否有效的月份的正则表达式：^(0?[[1-9]1[0-2]]$，其中0?表示匹配零个或1个“0”，[1-9]表示匹配数字1～9，1[0-2]表示匹配数字10、11、12。

二、实例1：验证电话号码的格式

//使用正则表达式验证电话号码
namespace _070
{
    public partial class Form1 : Form
    {
        private Label? label1;
        private Label? label2;
        private Label? label3;
        private Button? button1;
        private TextBox? textBox1;
        public Form1()
        {
            InitializeComponent();
            Load += Form1_Load;
        }
        private void Form1_Load(object? sender, EventArgs e)
        {
            // 
            // label1
            // 
            label1 = new Label
            {
                AutoSize = true,
                Location = new Point(36, 22),
                Name = "label1",
                Size = new Size(68, 17),
                TabIndex = 0,
                Text = "输入号码："
            };
            // 
            // label2
            //        
            label2 = new Label
            {
                AutoSize = true,
                Location = new Point(156, 49),
                Name = "label2",
                Size = new Size(79, 17),
                TabIndex = 1,
                Text = "xxx-xxxxxxxx"
            };
            // 
            // label3
            //          
            label3 = new Label
            {
                AutoSize = true,
                Location = new Point(36, 49),
                Name = "label3",
                Size = new Size(68, 17),
                TabIndex = 2,
                Text = "号码格式："
            };
            // 
            // button1
            //         
            button1 = new Button
            {
                Location = new Point(160, 76),
                Name = "button1",
                Size = new Size(75, 23),
                TabIndex = 3,
                Text = "号码验证",
                UseVisualStyleBackColor = true
            };
            button1.Click += Button1_Click;
            // 
            // textBox1
            // 
            textBox1 = new TextBox
            {
                Location = new Point(115, 16),
                Name = "textBox1",
                Size = new Size(120, 23),
                TabIndex = 4
            };
            // 
            // Form1
            // 
            AutoScaleDimensions = new SizeF(7F, 17F);
            AutoScaleMode = AutoScaleMode.Font;
            ClientSize = new Size(294, 111);
            Controls.Add(textBox1);
            Controls.Add(button1);
            Controls.Add(label3);
            Controls.Add(label2);
            Controls.Add(label1);
            Name = "Form1";
            StartPosition = FormStartPosition.CenterScreen;
            Text = "使用正则表达式验证电话号码";
          
        }
        /// <summary>
        /// 验证电话号码格式是否正确
        /// </summary>
        private void Button1_Click(object? sender, EventArgs e)
        {
            if (!IsTelephone(textBox1!.Text))
            { 
                MessageBox.Show("电话号码格式不正确"); 
            }
            else 
            { 
                MessageBox.Show("电话号码格式正确"); 
            }
        }

        /// <summary>
        /// 验证电话号码格式是否匹配
        /// </summary>
        /// <param name="str_telephone">电话号码信息</param>
        /// <returns>方法返回布尔值</returns>
        public static bool IsTelephone(string str_telephone)
        {
            return MyRegex().IsMatch(str_telephone);
        }

        [System.Text.RegularExpressions.GeneratedRegex(@"^(\d{3,4}-)?\d{6,8}$")]
        private static partial System.Text.RegularExpressions.Regex MyRegex();
    }
}

三、实例2：验证密码的格式

// 使用正则表达式验证密码格式
namespace _071
{
    public partial class Form1 : Form
    {
        private GroupBox? groupBox1;
        private Button? button1;
        private TextBox? textBox1;
        private Label? label1;

        public Form1()
        {
            InitializeComponent();
            Load += Form1_Load;
        }
        private void Form1_Load(object? sender, EventArgs e)
        {
            // 
            // button1
            // 
            button1 = new Button
            {
                Location = new Point(171, 58),
                Name = "button1",
                Size = new Size(100, 23),
                TabIndex = 2,
                Text = "验证密码格式",
                UseVisualStyleBackColor = true
            };
            button1.Click += Button1_Click;
            // 
            // textBox1
            // 

            textBox1 = new TextBox
            {
                Location = new Point(126, 24),
                Name = "textBox1",
                Size = new Size(145, 23),
                TabIndex = 1
            };
            // 
            // label1
            //

            label1 = new Label
            {
                AutoSize = true,
                Location = new Point(35, 30),
                Name = "label1",
                Size = new Size(68, 17),
                TabIndex = 0,
                Text = "输入密码："
            };
            // 
            // groupBox1
            // 
            groupBox1 = new GroupBox
            {
                Location = new Point(12, 12),
                Name = "groupBox1",
                Size = new Size(307, 87),
                TabIndex = 0,
                TabStop = false,
                Text = "密码必须由数字和大小写字母组成"
            };
            groupBox1.Controls.Add(button1);
            groupBox1.Controls.Add(textBox1);
            groupBox1.Controls.Add(label1);
            groupBox1.SuspendLayout();

            // 
            // Form1
            // 
            AutoScaleDimensions = new SizeF(7F, 17F);
            AutoScaleMode = AutoScaleMode.Font;
            ClientSize = new Size(331, 111);
            Controls.Add(groupBox1);
            Name = "Form1";
            StartPosition = FormStartPosition.CenterScreen;
            Text = "正则表达式验证密码格式";
            groupBox1.ResumeLayout(false);
            groupBox1.PerformLayout();
        }

        private void Button1_Click(object? sender, EventArgs e)
        {
            if (!IsPassword(textBox1!.Text.Trim()))
            { 
                MessageBox.Show("密码格式不正确!!!"); 
            }
            else
            {
                MessageBox.Show("密码格式正确!!!!!");
            }
        }
        /// <summary>
        /// 验证码码输入条件
        /// </summary>
        /// <param name="str_password">密码字符串</param>
        /// <returns>返回布尔值</returns>
        public static bool IsPassword(string str_password)
        {
            return MyRegex().IsMatch(str_password);
        }

        [System.Text.RegularExpressions.GeneratedRegex(@"[A-Za-z]+[0-9]")]//至少有一个字母，至少有一个数字
        //[System.Text.RegularExpressions.GeneratedRegex(@"[A-Z]+[a-z]+[0-9]")]//依次至少有一个大写一个小写一个
        //[System.Text.RegularExpressions.GeneratedRegex(@"[A-Za-z0-9]+")]//至少一个
        private static partial System.Text.RegularExpressions.Regex MyRegex();
    }
}

四、实例3：验证邮编的格式

// 用正则表达式验证邮编合法性
namespace _072
{
    public partial class Form1 : Form
    {
        private GroupBox? groupBox1;
        private TextBox? textBox1;
        private Button? button1;
        private Label? label1;

        public Form1()
        {
            InitializeComponent();
            Load += Form1_Load;
        }
        private void Form1_Load(object? sender, EventArgs e)
        {
            // 
            // textBox1
            // 
            textBox1 = new TextBox
            {
                Location = new Point(139, 32),
                Name = "textBox1",
                Size = new Size(100, 23),
                TabIndex = 2
            };
            // 
            // button1
            // 
            button1 = new Button
            {
                Location = new Point(139, 61),
                Name = "button1",
                Size = new Size(100, 23),
                TabIndex = 1,
                Text = "验证邮编",
                UseVisualStyleBackColor = true
            };
            button1.Click += Button1_Click;
            // 
            // label1
            // 
            label1 = new Label
            {
                AutoSize = true,
                Location = new Point(55, 35),
                Name = "label1",
                Size = new Size(68, 17),
                TabIndex = 0,
                Text = "输入邮编："
            };
            // 
            // groupBox1
            // 
            groupBox1 = new GroupBox
            {
                Location = new Point(12, 12),
                Name = "groupBox1",
                Size = new Size(280, 98),
                TabIndex = 0,
                TabStop = false,
                Text = "验证邮编格式："
            };
            groupBox1.Controls.Add(textBox1);
            groupBox1.Controls.Add(button1);
            groupBox1.Controls.Add(label1);
            groupBox1.SuspendLayout();
            // 
            // Form1
            // 
            AutoScaleDimensions = new SizeF(7F, 17F);
            AutoScaleMode = AutoScaleMode.Font;
            ClientSize = new Size(304, 122);
            Controls.Add(groupBox1);
            Name = "Form1";
            StartPosition = FormStartPosition.CenterScreen;
            Text = "验证邮编格式合法性";
            groupBox1.ResumeLayout(false);
            groupBox1.PerformLayout();
        }

        private void Button1_Click(object? sender, EventArgs e)
        {
            if (!IsPostalcode(textBox1!.Text))
            { 
                MessageBox.Show("邮政编号不正确!!!"); 
            }
            else 
            {
                MessageBox.Show("邮政编号正确!!!!!"); 
            }
        }
        /// <summary>
        /// 验证邮编格式是否正确
        /// </summary>
        /// <param name="str_postalcode">邮编字符串</param>
        /// <returns>返回布尔值</returns>
        public static bool IsPostalcode(string str_postalcode)
        {
            return MyRegex().IsMatch(str_postalcode);
        }

        [System.Text.RegularExpressions.GeneratedRegex(@"^\d{6}$")]
        private static partial System.Text.RegularExpressions.Regex MyRegex();
    }
}

五、实例4：验证手机号码的格式

//用正则表达式验证手机号码合法性
namespace _073
{
    public partial class Form1 : Form
    {
        private GroupBox? groupBox1;
        private Button? button1;
        private TextBox? textBox1;
        private Label? label1;

        public Form1()
        {
            InitializeComponent();
            Load += Form1_Load;
        }
        private void Form1_Load(object? sender, EventArgs e)
        {
            // 
            // button1
            // 
            button1 = new Button
            {
                Location = new Point(129, 60),
                Name = "button1",
                Size = new Size(120, 23),
                TabIndex = 3,
                Text = "验证手机号码",
                UseVisualStyleBackColor = true
            };
            button1.Click += Button1_Click;
            // 
            // textBox1
            // 
            textBox1 = new TextBox
            {
                Location = new Point(129, 31),
                Name = "textBox1",
                Size = new Size(120, 23),
                TabIndex = 1
            };
            // 
            // label1
            //           
            label1 = new Label
            {
                AutoSize = true,
                Location = new Point(31, 37),
                Name = "label1",
                Size = new Size(92, 17),
                TabIndex = 0,
                Text = "输入手机号码："
            };
            // 
            // groupBox1
            // 
            groupBox1 = new GroupBox
            {
                Location = new Point(12, 12),
                Name = "groupBox1",
                Size = new Size(280, 92),
                TabIndex = 0,
                TabStop = false,
                Text = "验证手机号码"
            };
            groupBox1.Controls.Add(button1);
            groupBox1.Controls.Add(textBox1);
            groupBox1.Controls.Add(label1);
            groupBox1.SuspendLayout();
           
            // 
            // Form1
            // 
            AutoScaleDimensions = new SizeF(7F, 17F);
            AutoScaleMode = AutoScaleMode.Font;
            ClientSize = new Size(304, 122);
            Controls.Add(groupBox1);
            Name = "Form1";
            StartPosition = FormStartPosition.CenterScreen;
            Text = "验证手机号码合法性";
            groupBox1.ResumeLayout(false);
            groupBox1.PerformLayout();
        }

        private void Button1_Click(object? sender, EventArgs e)
        {
            if (!IsHandset(textBox1!.Text))
            { 
                MessageBox.Show("手机号不正确!!!"); 
            }
            else
            {
                MessageBox.Show("手机号正确!!!!!"); 
            }
        }
        /// <summary>
        /// 验证手机号是否正确
        /// </summary>
        /// <param name="str_handset">手机号码字符串</param>
        /// <returns>返回布尔值</returns>
        public static bool IsHandset(string str_handset)
        {
            return MyRegex().IsMatch(str_handset);
        }

        [System.Text.RegularExpressions.GeneratedRegex(@"^[1]+[3-9]+\d{9}$")]
        private static partial System.Text.RegularExpressions.Regex MyRegex();
    }
}

六、实例5：验证身份证号码的格式

// 用正则表达式验证身份证号码合法性
namespace _074
{
    public partial class Form1 : Form
    {
        private GroupBox? groupBox1;
        private Button? button1;
        private TextBox? textBox1;
        private Label? label1;

        public Form1()
        {
            InitializeComponent();
            Load += Form1_Load;
        }
        private void Form1_Load(object? sender, EventArgs e)
        {
            // 
            // label1
            // 
            label1 = new Label
            {
                AutoSize = true,
                Location = new Point(16, 28),
                Name = "label1",
                Size = new Size(104, 17),
                TabIndex = 0,
                Text = "输入身份证号码："
            };
            // 
            // textBox1
            // 
            textBox1 = new TextBox
            {
                Location = new Point(125, 22),
                Name = "textBox1",
                Size = new Size(140, 23),
                TabIndex = 1
            };
            // 
            // button1
            // 
            button1 = new Button
            {
                Location = new Point(190, 57),
                Name = "button1",
                Size = new Size(75, 23),
                TabIndex = 2,
                Text = "验证",
                UseVisualStyleBackColor = true
            };
            button1.Click += Button1_Click;
            // 
            // groupBox1
            // 
            groupBox1 = new GroupBox
            {
                Location = new Point(12, 12),
                Name = "groupBox1",
                Size = new Size(280, 99),
                TabIndex = 0,
                TabStop = false,
                Text = "验证身份证号码"
            };
            groupBox1.Controls.Add(button1);
            groupBox1.Controls.Add(textBox1);
            groupBox1.Controls.Add(label1);
            groupBox1.SuspendLayout();

            // 
            // Form1
            // 
            AutoScaleDimensions = new SizeF(7F, 17F);
            AutoScaleMode = AutoScaleMode.Font;
            ClientSize = new Size(304, 123);
            Controls.Add(groupBox1);
            Name = "Form1";
            StartPosition = FormStartPosition.CenterScreen;
            Text = "验证身份证号码合法性";
            groupBox1.ResumeLayout(false);
            groupBox1.PerformLayout();
        }

        private void Button1_Click(object? sender, EventArgs e)
        {
            if (!IsIDcard(textBox1!.Text.Trim()))
            { 
                MessageBox.Show("身份证号不正确!!!");
            }
            else 
            { 
                MessageBox.Show("身份证号正确!!!!!"); 
            }
        }
        /// <summary>
        /// 验证身份证号是否正确
        /// </summary>
        /// <param name="idcard">身份证号字符串</param>
        /// <returns>返回布尔值</returns>
        public static bool IsIDcard(string idcard)
        {
            if (DateTime.IsLeapYear(Convert.ToInt32(idcard.Substring(6, 4))))
            {
                return MyRegex().IsMatch(idcard);
            }
            else
            {
                return MyRegex1().IsMatch(idcard);
            }    
        }

        [System.Text.RegularExpressions.GeneratedRegex(@"(^[1-9]\d{5}(19|20)\d{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2]\d|3[0-1])|(04|06|09|11)(0[1-9]|[1-2]\d|30)|02(0[1-9]|[1-2]\d))\d{3}[\dXx]$)")]
        private static partial System.Text.RegularExpressions.Regex MyRegex();

        [System.Text.RegularExpressions.GeneratedRegex(@"(^[1-9]\d{5}(19|20)\d{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2]\d|3[0-1])|(04|06|09|11)(0[1-9]|[1-2]\d|30)|02(0[1-9]|1\d|2[0-8]))\d{3}[\dXx]$)")]
        private static partial System.Text.RegularExpressions.Regex MyRegex1();
    }
}

七、实例6：验证小数点后位数是否2位

// 验证小数点后是否为2位
namespace _075
{
    public partial class Form1 : Form
    {
        private GroupBox? groupBox1;
        private Button? button1;
        private TextBox? textBox1;
        private Label? label1;

        public Form1()
        {
            InitializeComponent();
            Load += Form1_Load;
        }
        private void Form1_Load(object? sender, EventArgs e)
        {
            // 
            // label1
            // 
            label1 = new Label
            {
                AutoSize = true,
                Location = new Point(25, 30),
                Name = "label1",
                Size = new Size(68, 17),
                TabIndex = 0,
                Text = "输入小数："
            };
            // 
            // textBox1
            // 
            textBox1 = new TextBox
            {
                Location = new Point(121, 24),
                Name = "textBox1",
                Size = new Size(135, 23),
                TabIndex = 1
            };
            // 
            // button1
            // 
            button1 = new Button
            {
                Location = new Point(181, 59),
                Name = "button1",
                Size = new Size(75, 23),
                TabIndex = 2,
                Text = "验证",
                UseVisualStyleBackColor = true
            };
            button1.Click += Button1_Click;
            // 
            // groupBox1
            // 
            groupBox1 = new GroupBox
            {
                Location = new Point(12, 11),
                Name = "groupBox1",
                Size = new Size(280, 100),
                TabIndex = 0,
                TabStop = false,
                Text = "验证小数点后位数"
            };
            groupBox1.Controls.Add(button1);
            groupBox1.Controls.Add(textBox1);
            groupBox1.Controls.Add(label1);
            groupBox1.SuspendLayout();

            // 
            // Form1
            // 
            AutoScaleDimensions = new SizeF(7F, 17F);
            AutoScaleMode = AutoScaleMode.Font;
            ClientSize = new Size(304, 123);
            Controls.Add(groupBox1);
            Name = "Form1";
            StartPosition = FormStartPosition.CenterScreen;
            Text = "验证小数点后是否2位";
            groupBox1.ResumeLayout(false);
            groupBox1.PerformLayout();
        }

        private void Button1_Click(object? sender, EventArgs e)
        {
            if (!IsDecimal(textBox1!.Text.Trim()))
            { 
                MessageBox.Show("请输入两位小数!!!", "提示"); 
            }
            else
            { 
                MessageBox.Show("输入正确!!!!!", "提示"); 
            }
        }
        /// <summary>
        /// 验证小数是否正确
        /// 等效的正则：@"^[0-9]+\.\d{2}$"
        /// 等效的正则：@"^[0-9]+(.\d{2})$"
        /// 等效的正则：@"^[0-9]+.\d{2}$"
        /// 等效的正则：@"^[0-9]+\.[0-9]{2}$"
        /// </summary>
        /// <param name="str_decimal">小数字符串</param>
        /// <returns>返回布尔值</returns>
        public static bool IsDecimal(string str_decimal)
        {
            return MyRegex().IsMatch(str_decimal);
        }

        [System.Text.RegularExpressions.GeneratedRegex(@"^[0-9]+(.\d{2})?$")]
        private static partial System.Text.RegularExpressions.Regex MyRegex();
    }
}

八、实例7：验证输入的数值是否有效月

// 用正则表达式验证输入的数字是否有效月
namespace _076
{
    public partial class Form1 : Form
    {
        private GroupBox? groupBox1;
        private Button? button1;
        private TextBox? textBox1;
        private Label? label1;

        public Form1()
        {
            InitializeComponent();
            Load += Form1_Load;
        }
        private void Form1_Load(object? sender, EventArgs e)
        {
            // 
            // label1
            // 
            label1 = new Label
            {
                AutoSize = true,
                Location = new Point(34, 33),
                Name = "label1",
                Size = new Size(92, 17),
                TabIndex = 0,
                Text = "输入月份数值："
            };
            // 
            // textBox1
            // 
            textBox1 = new TextBox
            {
                Location = new Point(132, 30),
                Name = "textBox1",
                Size = new Size(100, 23),
                TabIndex = 1
            };
            // 
            // button1
            // 

            button1 = new Button
            {
                Location = new Point(157, 59),
                Name = "button1",
                Size = new Size(75, 23),
                TabIndex = 2,
                Text = "验证",
                UseVisualStyleBackColor = true
            };
            button1.Click += Button1_Click;
            // 
            // groupBox1
            // 
            groupBox1 = new GroupBox
            {
                Location = new Point(12, 11),
                Name = "groupBox1",
                Size = new Size(280, 100),
                TabIndex = 0,
                TabStop = false,
                Text = "验证是否有效的月"
            };
            groupBox1.Controls.Add(button1);
            groupBox1.Controls.Add(textBox1);
            groupBox1.Controls.Add(label1);
            groupBox1.SuspendLayout();

            // 
            // Form1
            // 
            AutoScaleDimensions = new SizeF(7F, 17F);
            AutoScaleMode = AutoScaleMode.Font;
            ClientSize = new Size(304, 123);
            Controls.Add(groupBox1);
            Name = "Form1";
            StartPosition = FormStartPosition.CenterScreen;
            Text = "验证数字是否有效月";
            groupBox1.ResumeLayout(false);
            groupBox1.PerformLayout();
        }

        private void Button1_Click(object? sender, EventArgs e)
        {
            if (!IsMonth(textBox1!.Text.Trim()))
            {
                MessageBox.Show("输入月份不正确!!!", "提示");
            }
            else
            {
                MessageBox.Show("输入信息正确!!!!!", "提示"); 
            }
        }
        /// <summary>
        /// 验证月份是否正确
        /// </summary>
        /// <param name="str_Month">月份信息字符串</param>
        /// <returns>返回布尔值</returns>
        public static bool IsMonth(string str_Month)
        {
            return MyRegex().IsMatch(str_Month);
        }

        [System.Text.RegularExpressions.GeneratedRegex(@"^(0?[[1-9]|1[0-2])$")]
        private static partial System.Text.RegularExpressions.Regex MyRegex();
    }
}