廢話不多說了，直接給大家貼代碼了，具體代碼如下所述：

 /// <summary> /// 類型轉(zhuǎn)換類 /// 處理數(shù)據(jù)庫獲取字段為空的情況 /// </summary> public static class DBConvert {  #region------------------ToInt32類型轉(zhuǎn)換------------------  /// <summary>  /// 讀取數(shù)據(jù)庫中字符串并轉(zhuǎn)換成Int32  /// 為空時返回0  /// </summary>  /// <param name="obj">object類型的值</param>  /// <returns>Int32類型</returns>  public static int ToInt32(object obj)  {   int result = 0;   if (IsInt(Convert.ToString(obj)))   {    result = Convert.ToInt32(obj);   }   else if (obj != null && obj is Enum) //處理非null值類型時(或者枚舉)   {    result = ((IConvertible)obj).ToInt32(null);   }   return result;  }  /// <summary>  /// 讀取數(shù)據(jù)庫中字符串并轉(zhuǎn)換成Int32  /// 為空時返回0  /// </summary>  /// <param name="str">string類型的值</param>  /// <returns>Int32類型</returns>  public static int ToInt32(string str)  {   int result = 0;   if (IsInt(str))   {    result = Convert.ToInt32(str);   }   return result;  }  /// <summary>  /// 判斷一個字符串是否屬于Int類型  /// 如果是的返回true，如果不是返回false  /// </summary>  /// <param name="str">string類型的值</param>  /// <returns>true：是Int的字符串(即可以轉(zhuǎn)換成Int類型)，false：不是Int類型的字符串</returns>  public static bool IsInt(string str)  {   bool result = false;   if (str != "" && str!=null)   {    Regex reg = new Regex("^[0-9]*$");    if (reg.IsMatch(str))    {     result = true;    }   }   return result;  }  #endregion  #region------------------ToString類型轉(zhuǎn)換------------------  /// <summary>  /// 讀取數(shù)據(jù)庫中字符串并轉(zhuǎn)換成string  /// </summary>  /// <param name="obj">object類型的值</param>  /// <returns>string類型</returns>  public static string ToString(object obj)  {   string result = "";   if (obj != null)   {    result = Convert.ToString(obj);   }   return result;  }  #endregion  #region------------------ToDouble類型轉(zhuǎn)換------------------  /// <summary>  /// 判斷一個字符串是否屬于Double類型(包括負(fù)浮點(diǎn)型)  /// 如果是的返回true，如果不是返回false  /// </summary>  /// <param name="str">string類型的值</param>  /// <returns>true：是Double的字符串(即可以轉(zhuǎn)換成Double類型)，false：不是Double類型的字符串</returns>  public static bool IsDouble(string str)  {   bool result = false;   if (str != "" && str != null)   {    Regex reg = new Regex(@"^(-?/d+)(/./d+)?$");    if (reg.IsMatch(str))    {     result = true;    }   }   return result;  }  /// <summary>  /// 讀取數(shù)據(jù)庫中字符串并轉(zhuǎn)換成Int32  /// 為空時返回0  /// </summary>  /// <param name="obj">object類型的值</param>  /// <returns>Int32類型</returns>  public static double ToDouble(object obj)  {   double result = 0.0;   if (IsDouble(Convert.ToString(obj)))   {    result = Convert.ToDouble(obj);   }   else if (obj != null && obj is Enum) //處理枚舉   {    result = ((IConvertible)obj).ToDouble(null);   }   return result;  }  /// <summary>  /// 讀取數(shù)據(jù)庫中字符串并轉(zhuǎn)換成Int32  /// 為空時返回0  /// </summary>  /// <param name="str">string類型的值</param>  /// <returns>Int32類型</returns>  public static double ToDouble(string str)  {   double result = 0.0;   if (IsDouble(str))   {    result = Convert.ToDouble(str);   }   return result;  }  #endregion  #region------------------ToDateTime類型轉(zhuǎn)換------------------  /// <summary>  /// 判斷時間格式是否是時間類型  /// 如23:10  /// </summary>  /// <param name="str">要判斷的字符串</param>  /// <returns>true：是時間類型的字符串(即可以轉(zhuǎn)換成時間類型)，false：不是時間類型的字符串</returns>  public static bool isDateTime(string str)  {   bool result = false;   if (str != "" && str != null)   {    Regex reg = new Regex("(([01]//d)|(2[0-3])):[0-5]//d");    if (reg.IsMatch(str))    {     result = true;    }   }   return result;  }  #endregion }}//"^/d+(/./d+)?$"　　//非負(fù)浮點(diǎn)數(shù)（正浮點(diǎn)數(shù) + 0）//"^(([0-9]+/.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*/.[0-9]+)|([0-9]*[1-9][0-9]*))$"　　//正浮點(diǎn)數(shù)//"^((-/d+(/./d+)?)|(0+(/.0+)?))$"　　//非正浮點(diǎn)數(shù)（負(fù)浮點(diǎn)數(shù) + 0）//"^(-(([0-9]+/.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*/.[0-9]+)|([0-9]*[1-9][0-9]*)))$"　　//負(fù)浮點(diǎn)數(shù)//"^(-?/d+)(/./d+)?$"　　//浮點(diǎn)數(shù)