通过本文主要向大家介绍了asp.net,asp net培训,asp和asp.net的区别,零基础学asp.net,c#和asp.net的区别等相关知识,希望对您有所帮助,也希望大家支持linkedu.com www.linkedu.com
废话不多说了,直接给大家贴代码了,具体代码如下所述:
/// <summary> /// 类型转换类 /// 处理数据库获取字段为空的情况 /// </summary> public static class DBConvert { #region------------------ToInt32类型转换------------------ /// <summary> /// 读取数据库中字符串并转换成Int32 /// 为空时返回0 /// </summary> /// <param name="obj">object类型的值</param> /// <returns>Int32类型</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) //处理非null值类型时(或者枚举) { result = ((IConvertible)obj).ToInt32(null); } return result; } /// <summary> /// 读取数据库中字符串并转换成Int32 /// 为空时返回0 /// </summary> /// <param name="str">string类型的值</param> /// <returns>Int32类型</returns> public static int ToInt32(string str) { int result = 0; if (IsInt(str)) { result = Convert.ToInt32(str); } return result; } /// <summary> /// 判断一个字符串是否属于Int类型 /// 如果是的返回true,如果不是返回false /// </summary> /// <param name="str">string类型的值</param> /// <returns>true:是Int的字符串(即可以转换成Int类型),false:不是Int类型的字符串</returns> public static bool IsInt(string str) { bool result = false; if (str != "" && str!=null) { Regex reg = new Regex("^[0-9]*$"); if (reg.IsMatch(str)) { result = true; } } return result; } #endregion #region------------------ToString类型转换------------------ /// <summary> /// 读取数据库中字符串并转换成string /// </summary> /// <param name="obj">object类型的值</param> /// <returns>string类型</returns> public static string ToString(object obj) { string result = ""; if (obj != null) { result = Convert.ToString(obj); } return result; } #endregion #region------------------ToDouble类型转换------------------ /// <summary> /// 判断一个字符串是否属于Double类型(包括负浮点型) /// 如果是的返回true,如果不是返回false /// </summary> /// <param name="str">string类型的值</param> /// <returns>true:是Double的字符串(即可以转换成Double类型),false:不是Double类型的字符串</returns> public static bool IsDouble(string str) { bool result = false; if (str != "" && str != null) { Regex reg = new Regex(@"^(-?\d+)(\.\d+)?$"); if (reg.IsMatch(str)) { result = true; } } return result; } /// <summary> /// 读取数据库中字符串并转换成Int32 /// 为空时返回0 /// </summary> /// <param name="obj">object类型的值</param> /// <returns>Int32类型</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) //处理枚举 { result = ((IConvertible)obj).ToDouble(null); } return result; } /// <summary> /// 读取数据库中字符串并转换成Int32 /// 为空时返回0 /// </summary> /// <param name="str">string类型的值</param> /// <returns>Int32类型</returns> public static double ToDouble(string str) { double result = 0.0; if (IsDouble(str)) { result = Convert.ToDouble(str); } return result; } #endregion #region------------------ToDateTime类型转换------------------ /// <summary> /// 判断时间格式是否是时间类型 /// 如23:10 /// </summary> /// <param name="str">要判断的字符串</param> /// <returns>true:是时间类型的字符串(即可以转换成时间类型),false:不是时间类型的字符串</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+)?$" //非负浮点数(正浮点数 + 0) //"^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$" //正浮点数 //"^((-\d+(\.\d+)?)|(0+(\.0+)?))$" //非正浮点数(负浮点数 + 0) //"^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$" //负浮点数 //"^(-?\d+)(\.\d+)?$" //浮点数</div>
好了,Asp.Net类型转换类(通用类)代码分享到此结束。
下面看下ASP.NET页面数据验证通用类的实例代码。
public class PageValidate { private static Regex RegPhone = new Regex("^[0-9]+[-]?[0-9]+[-]?[0-9]$"); private static Regex RegNumber = new Regex("^[0-9]+$"); private static Regex RegNumberSign = new Regex("^[+-]?[0-9]+$"); private static Regex RegDecimal = new Regex("^[0-9]+[.]?[0-9]+$"); private static Regex RegDecimalSign = new Regex("^[+-]?[0-9]+[.]?[0-9]+$"); //等价于^[+-]?\d+[.]?\d+$ private static Regex RegEmail = new Regex("^[\\w-]+@[\\w-]+\\.(com|net|org|edu|mil|tv|biz|info)$");//w 英文字母或数字的字符串,和 [a-zA-Z0-9] 语法一样 private static Regex RegCHZN = new Regex("[\u4e00-\u9fa5]"); public PageValidate() { } //数字字符串检查#region 数字字符串检查 public static bool IsPhone(string inputData) { Match m = RegPhone.Match(inputData); return m.Success; } /**//// <summary> /// 检查Request查询字符串的键值,是否是数字,最大长度限制 /// </summary> /// <param name="req">Request</param> /// <param name="inputKey">Request的键值</param> /// <param name="maxLen">最大长度</param> /// <returns>返回Request查询字符串</returns> public static string FetchInputDigit(HttpRequest req, string inputKey, int maxLen) { string retVal = string.Empty; if(inputKey != null && inputKey != string.Empty) { retVal = req.QueryString[inputKey]; if(null == retVal) retVal = req.Form[inputKey]; if(null != retVal) { retVal = SqlText(retVal, maxLen); if(!IsNumber(retVal)) retVal = string.Empty; } } if(retVal == null) retVal = string.Empty; return retVal; } /**//// <summary> /// 是否数字字符串 /// </summary> /// <param name="inputData">输入字符串</param> /// <returns></returns> public static bool IsNumber(string inputData) { Match m = RegNumber.Match(inputData); return m.Success; } /**//// <summary> /// 是否数字字符串 可带正负号 /// </summary> /// <param name="inputData">输入字符串</param> /// <returns></returns> public static bool IsNumberSign(string inputData) { Match m = RegNumberSign.Match(inputData); return m.Success; } /**//// <summary> /// 是否是浮点数 /// </summary> /// <param name="inputData">输入字符串</param> /// <returns></returns> public static bool IsDecimal(string inputData) { Match m = RegDecimal.Match(inputData); return m.Success; } /**//// <summary> /// 是否是浮点数 可带正负号 /// </summary> /// <param name="inputData">输入字符串</param> /// <returns></returns> public static bool IsDecimalSign(string inputData) { Match m = RegDecimalSign.Match(inputData); return m.Success; } #endregion //中文检测#region 中文检测 /**//// <summary> /// 检测是否有中文字符 /// </summary> /// <param name="inputData"></param> /// <returns></returns> public static bool IsHasCHZN(string inputData) { Match m = RegCHZN.Match(inputData); return m.Success; } #endregion