winform 表单正则表达式验证 示例（ValidationRule）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using DevExpress.XtraEditors.DXErrorProvider;
using DevExpress.XtraEditors.Controls;
using System.Text.RegularExpressions;

namespace DevDemo
{
    public partial class LoginForm : Form
    {
        public LoginForm()
        {
            InitializeComponent();
            InitValidationMode();
        }

        private void InitValidationMode()
        {
            CustomValidationRule rule = new CustomValidationRule();
            rule.ErrorText = "用户登录代码只能是8位长，并且前两位是字符，后面是数字";
            rule.ErrorType = ErrorType.Critical;
            //绑定验证控件
            vpMain.SetValidationRule(txtUserName, rule);
        }

        private void btnLogin_Click(object sender, EventArgs e)
        {
            vpMain.Validate();
            if (txtUserName.Text == "vp123456" && txtPassword.Text == MD5("aaaaaa"))
            {
                this.Hide();
                MainForm m = new MainForm();
                m.Show();
            }
        }

        private string MD5(string str)
        {
            return str;
        }
    }

    #region CustomValidationRule
    // <customTextEdit>
    public class CustomValidationRule : ValidationRule
    {
        public override bool Validate(Control control, object value)
        {
            string parttern = @"^[\w\W]{2}\d{6}$";
            bool res = false;
            res = Regex.IsMatch(value.ToString(), parttern);
            return res;
        }
    }

    #endregion
}

LoginForm.cs

namespace DevDemo
{
    partial class LoginForm
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.components = new System.ComponentModel.Container();
            this.btnLogin = new DevExpress.XtraEditors.SimpleButton();
            this.lblUserName = new DevExpress.XtraEditors.LabelControl();
            this.lblPassword = new DevExpress.XtraEditors.LabelControl();
            this.txtUserName = new DevExpress.XtraEditors.TextEdit();
            this.vpMain = new DevExpress.XtraEditors.DXErrorProvider.DXValidationProvider(this.components);
            this.txtPassword = new DevExpress.XtraEditors.TextEdit();
            ((System.ComponentModel.ISupportInitialize)(this.txtUserName.Properties)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.vpMain)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.txtPassword.Properties)).BeginInit();
            this.SuspendLayout();
            //
            // btnLogin
            //
            this.btnLogin.Location = new System.Drawing.Point(, );
            this.btnLogin.Name = "btnLogin";
            this.btnLogin.Size = new System.Drawing.Size(, );
            this.btnLogin.TabIndex = ;
            this.btnLogin.Text = "登录";
            this.btnLogin.Click += new System.EventHandler(this.btnLogin_Click);
            //
            // lblUserName
            //
            this.lblUserName.Location = new System.Drawing.Point(, );
            this.lblUserName.Name = "lblUserName";
            this.lblUserName.Size = new System.Drawing.Size(, );
            this.lblUserName.TabIndex = ;
            this.lblUserName.Text = "用户名";
            //
            // lblPassword
            //
            this.lblPassword.Location = new System.Drawing.Point(, );
            this.lblPassword.Name = "lblPassword";
            this.lblPassword.Size = new System.Drawing.Size(, );
            this.lblPassword.TabIndex = ;
            this.lblPassword.Text = "密    码";
            //
            // txtUserName
            //
            this.vpMain.SetIconAlignment(this.txtUserName, System.Windows.Forms.ErrorIconAlignment.MiddleRight);
            this.txtUserName.Location = new System.Drawing.Point(, );
            this.txtUserName.Name = "txtUserName";
            this.txtUserName.Size = new System.Drawing.Size(, );
            this.txtUserName.TabIndex = ;
            //
            // txtPassword
            //
            this.vpMain.SetIconAlignment(this.txtPassword, System.Windows.Forms.ErrorIconAlignment.MiddleRight);
            this.txtPassword.Location = new System.Drawing.Point(, );
            this.txtPassword.Name = "txtPassword";
            this.txtPassword.Properties.PasswordChar = '*';
            this.txtPassword.Size = new System.Drawing.Size(, );
            this.txtPassword.TabIndex = ;
            //
            // LoginForm
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(, );
            this.Controls.Add(this.txtPassword);
            this.Controls.Add(this.txtUserName);
            this.Controls.Add(this.lblPassword);
            this.Controls.Add(this.lblUserName);
            this.Controls.Add(this.btnLogin);
            this.Name = "LoginForm";
            this.Text = "登陆";
            ((System.ComponentModel.ISupportInitialize)(this.txtUserName.Properties)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.vpMain)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.txtPassword.Properties)).EndInit();
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private DevExpress.XtraEditors.SimpleButton btnLogin;
        private DevExpress.XtraEditors.LabelControl lblUserName;
        private DevExpress.XtraEditors.LabelControl lblPassword;
        private DevExpress.XtraEditors.TextEdit txtUserName;
        private DevExpress.XtraEditors.DXErrorProvider.DXValidationProvider vpMain;
        private DevExpress.XtraEditors.TextEdit txtPassword;
    }
}

LoginForm.Designer.cs

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