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");
}
}
}