筆記-自訂Silverlight 3檢核邏輯(同場加映統一編號檢核)

using System;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.ComponentModel.DataAnnotations;

using System.ComponentModel;

using System.Text.RegularExpressions;

namespace SLInterop

{

    public class DataBindClass : INotifyPropertyChanged

    {

        #region 統一編號，示範自訂檢核

        private string companyId;

        public string CompanyId  {

            get { return companyId; }

            set

            {

                companyId = value;

                string chkMsg = 

                    ValidateHelper.ValidateCompanyId(value);

                if (chkMsg.Length > 0)

                {

                    //若無效時強迫清空可加入以下兩行

     companyId = "";

                    NotifyPropertyChanged("CompanyId");

                    //抛出錯誤訊息

                    throw new ValidationException(chkMsg);

                }

                NotifyPropertyChanged("CompanyId");

            }

        }

        #endregion

        #region 識別碼，示範Data Annontation

        //利用宣告加上檢核條件

        private string id;

        [Required(ErrorMessage="識別碼不可空白!")]

        [StringLength(5, MinimumLength=3, 

            ErrorMessage="識別碼需為3-5碼!")]

        public string Id

        {

            get { return id; }

            set

            {

                id = value;

                //呼叫Validator.ValidateProperty進行檢核

                Validate(value, "Id");

                NotifyPropertyChanged("Id");

            }

        }

        #endregion

        #region Annotation 檢核共用函數

        //REF: http://msdn.microsoft.com/en-us/magazine/ee335695.aspx

        protected void Validate(object value, string propertyName)

        {

            Validator.ValidateProperty(value,

            new ValidationContext(this, null, null)

            {

                MemberName = propertyName

            });

        }

        #endregion

        #region 屬性值改變通知共用函數，TwoWay Binding必備

        public event PropertyChangedEventHandler PropertyChanged;

        private void NotifyPropertyChanged(String info)

        {

            if (PropertyChanged != null)

            {

                PropertyChanged(this, new PropertyChangedEventArgs(info));

            }

        }

        #endregion

    }

    #region 統編檢查

    public static class ValidateHelper 

    {

        static byte[] companyIdChkFac = { 1, 2, 1, 2, 1, 2, 4, 1 };

        public static string ValidateCompanyId(string id)

        {

            //REF: http://herolin.mine.nu/entry/is-valid-TW-company-ID

            //檢核是否為有效統編

            string errMsg = "";

            if (string.IsNullOrEmpty(id)) return errMsg;

            if (!Regex.IsMatch(id, "\\d{8}"))

                errMsg = "統編應為8位數字!";

            else

            {

                int sum = 0;

                for (int i = 0; i < 8; i++)

                {

                    int d = (id[i] - 48) * companyIdChkFac[i];

                    sum += d / 10 + d % 10;

                }

                if (

                    !(sum % 10 == 0 ||

                      id[6] == '7' && (sum + 1) % 10 == 0)

                    )

                    errMsg = "統編檢查碼不符!";

            }

            return errMsg;

        }

    }

    #endregion

    public partial class MainPage : UserControl

    {

        //設定TextBox TwoWay Binding

        private void SetTextBoxBinding(

            TextBox txt, object bindTarget, string propName)

        {

            Binding bind = new Binding();

            bind.Mode = BindingMode.TwoWay;

            bind.Path = new PropertyPath(propName);

            bind.Source = bindTarget;

            bind.NotifyOnValidationError = true;

            bind.ValidatesOnExceptions = true;

            txt.SetBinding(TextBox.TextProperty, bind);

        }

        public MainPage()

        {

            InitializeComponent();

            DataBindClass bdc = new DataBindClass();

            SetTextBoxBinding(txtCmpId, bdc, "CompanyId");

            SetTextBoxBinding(txtId, bdc, "Id");

        }

    }

}