#眉標=Enterprise Library
#副標=設計模型套件系列（14）
#大標=簡單建立密碼驗証原則
#作者=文／圖	王寧疆



===<反灰>=============
using System.Configuration;
public class StrongPasswordValidatorData : 
     Microsoft.Practices.EnterpriseLibrary.Validation.Configuration.ValueValidatorData
{
      public StrongPasswordValidatorData()
    {
    }

    public StrongPasswordValidatorData(string name) : base(name, typeof(StrongPasswordValidatorData))
    {
    }

    protected override Microsoft.Practices.EnterpriseLibrary.Validation.Validator DoCreateValidator(
     Type targetType)
    {
        return new StrongPasswordValidator(MinLength, MinUpperCase, MinLowerCase, 
     MinNumbers, MinSymbols);	//建立負責驗証資料的Validator
    }

    private const string MinLengthPropertyName = "minLength";	//存放minLength屬性內容值的變數
    [ConfigurationProperty(MinLengthPropertyName)]			//定義名稱為minLength的屬性
    public int MinLength
    {
        get { return (int)this[MinLengthPropertyName]; }
        set { this[MinLengthPropertyName] = value; }
    }

   private const string minUpperCasePropertyName="minUpperCase";//存放minUpperCase屬性內容值的變數
    [ConfigurationProperty(minUpperCasePropertyName)] 		//定義名稱為minUpperCase的屬性
    public int MinUpperCase
    {
        get { return (int)this[minUpperCasePropertyName]; }
        set { this[minUpperCasePropertyName] = value; }
    }

  private const string MinLowerCasePropertyName="minLowerCase";//存放minLowerCase屬性內容值的變數
    [ConfigurationProperty(MinLowerCasePropertyName)] 		//定義名稱為minLowerCase的屬性
    public int MinLowerCase
    {
        get { return (int)this[MinLowerCasePropertyName]; }
        set { this[MinLowerCasePropertyName] = value; }
    }

    private const string MinNumbersPropertyName = "minNumbers";	//存放minNumbers屬性內容值的變數
    [ConfigurationProperty(MinNumbersPropertyName)] 			//定義名稱為minNumbers的屬性
    public int MinNumbers
    {
        get { return (int)this[MinNumbersPropertyName]; }
        set { this[MinNumbersPropertyName] = value; }
    }

    private const string MinSymbolsPropertyName = "minSymbols";	//存放minSymbols屬性內容值的變數
    [ConfigurationProperty(MinSymbolsPropertyName)] 			//定義名稱為minSymbols的屬性
    public int MinSymbols
    {
        get { return (int)this[MinSymbolsPropertyName]; }
        set { this[MinSymbolsPropertyName] = value; }
    }
==<end>==============




===<反灰>=============
[ConfigurationElementType(typeof(CustomValidator.Configuration.StrongPasswordValidatorData))]
public class StrongPasswordValidator : 
     Microsoft.Practices.EnterpriseLibrary.Validation.Validators.ValueValidator<string>
==<end>==============




===<反灰>=============
private int minLength;
private int minLowerCase;
private int minUpperCase;
private int minNumbers;
private int minSymbols;
==<end>==============




===<反灰>=============
private static char[] upperLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".ToCharArray();
private static char[] lowerLetters = "abcdefghijklmnopqrstuvwxyz".ToCharArray();
private static char[] numbers = "1234567890".ToCharArray();
private static char[] symbols = @"`~!@#$%^&*()-_=+[]\{}|;:'"",./<>?".ToCharArray();
==<end>==============




===<反灰>=============
public StrongPasswordValidator(int minLength, int minUpperCase, int minLowerCase, int minNumbers, 
     int minSymbols) : base(null, null, false)
{
    this.minLength = minLength;
    this.minLowerCase = minLowerCase;
    this.minUpperCase = minUpperCase;
    this.minNumbers = minNumbers;
    this.minSymbols = minSymbols;
}
==<end>==============




===<反灰>=============
protected override string DefaultNonNegatedMessageTemplate	//定義正向驗証失敗顯示的錯誤訊息的樣版
{
    get 
    { 
     return "密碼的長度必須至少{3}個字元, 內含{4}個大寫字母, {5}個小寫字母, {6}個阿拉伯數字, " + 
"以及{7}個特殊字元."; 
    }
}

protected override string DefaultNegatedMessageTemplate		//定義反向驗証失敗顯示的錯誤訊息的樣版
{
    get 
    {
        return "密碼的長度不可以至少{3}個字元, 內含{4}個大寫字母, {5}個小寫字母, " + 
     "{6}個阿拉伯數字, 以及{7}個特殊字元."; 
    }
}

protected override void DoValidate(string objectToValidate, object currentTarget, string key, 
    Microsoft.Practices.EnterpriseLibrary.Validation.ValidationResults validationResults) //執行驗証工作的方法
{
    bool valid = true;
    if (objectToValidate.Length < minLength)					//被驗証的字串的長度是否過短
    {
        valid = false;
    }
    else if (CountOccurrences(objectToValidate, upperLetters) 
     < minUpperCase) 			   //被驗証的字串的大寫字母數目是否足夠
    {
        valid = false;
    }
    else if (CountOccurrences(objectToValidate, lowerLetters) 
     < minLowerCase)			   //被驗証的字串的小寫字母數目是否足夠
    {
        valid = false;
    }
    else if (CountOccurrences(objectToValidate, numbers) 
     < minNumbers)		     //被驗証的字串的阿拉伯數字的數目是否足夠
    {
        valid = false;
    }
    else if (CountOccurrences(objectToValidate, symbols) 
     < minSymbols)			   //被驗証的字串的特殊字元數目是否足夠
    {
        valid = false;
    }
    if (valid == Negated)										//記錄驗証失敗的結果
    {
        this.LogValidationResult(validationResults, GetMessage(objectToValidate, key), currentTarget, key);
    }
}

protected override string GetMessage(object objectToValidate, string key)			//傳回驗証結果訊息
{
　　return string.Format(System.Globalization.CultureInfo.CurrentUICulture, this.MessageTemplate, 
objectToValidate, key, this.Tag, minLength, minUpperCase, minLowerCase, minNumbers, minSymbols);
}
==<end>==============




==<box>===========
if (Regex.IsMatch("使用者輸入的密碼", 
     @"^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[\-\+\?\*\$\[\]\^\.\(\)\|`~!@#%&_ ={}:;',/]).{8,16}$"))
{
    MessageBox.Show("正確!");
}
else
{
    MessageBox.Show("錯誤!");
}

	最後請為所製作的Provider類別加入以下負責計算密碼內含指定字元的數目的方法：

private int CountOccurrences(string input, char[] searchChars)
{
    int count = -1;										//記錄字元出現次數的變數
    int position = -1;									//記錄字元出現位置的變數
    do
    {
        position = input.IndexOfAny(searchChars, position + 1);			//搜尋字串中的指定字元
        count++;										//遞增指定字元的出現次數
    } while (position >= 0);					//如果所尋找的字元有尋獲，則必須再找下一個
    return count;										//傳回指定字元的出現次數
}
===<反灰>=============




===<反灰>=============
using Microsoft.Practices.EnterpriseLibrary.Validation;
==<end>==============




===<反灰>=============
ValidationResults results = Validation.Validate<string>(
txtPassword.Text, "Password");		//呼叫Validation類別的Validate方法驗証使用者輸入的資//料是否合乎名稱為Password的RuleSet設定的規則
if (results.IsValid)												//如果通過驗証
{
    MessageBox.Show("安全性極佳的密碼!");					//顯示密碼安全性極佳的訊息
}
else														//如果未通過驗証
{
    StringBuilder sb = new StringBuilder();						//建立StringBuilder類別的物件
    foreach (ValidationResult result in results)					//取出results集合中的所有訊息
    {
        sb.Append(result.Message);						//串連到StringBuilder類別的物件中
    }
    MessageBox.Show(sb.ToString());						//顯示密碼未符合規定的錯誤訊息
}
==<end>==============




===<反灰>=============
CustomValidator.StrongPasswordValidator, StrongPasswordValidator, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
==<end>==============



===<反灰>=============
<validation>
    <type assemblyName="mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
      name="System.String">
      <ruleset name="Password">
        <validator minLength="8" minLowerCase="1" minUpperCase="1" minSymbols="1"
          minNumbers="1" messageTemplate="" messageTemplateResourceName=""
          messageTemplateResourceType="" tag="" type="CustomValidator.StrongPasswordValidator, 
    StrongPasswordValidator, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"
          name="Custom Validator" />
      </ruleset>
    </type>
  </validation>
==<end>==============