C#数据转换类ConvertEx,封装.Net的Convert对象|C/S框架网

C#数据转换类ConvertEx,封装.Net的Convert对象

作者:C/S框架网|www.cscode.ne 发布日期:2021/03/11 12:10:01

C#数据转换类ConvertEx,封装.Net的Convert对象

C# Code:

/// <summary>
///C#数据转换类ConvertEx,封装.Net的Convert对象.
/// </summary>
public class ConvertEx
{
/// <summary>
/// 将日期转换为指定格式的字符串
/// </summary>
/// <param name="dt">日期</param>
/// <param name="format">日期格式, 如: yyyy-MM-dd</param>
/// <returns>返回字符串类型</returns>
public static string ToDateString(DateTime dt, string format)
{
return dt.ToString(format, DateTimeFormatInfo.CurrentInfo);
}

/// <summary>
/// 将日期转换为年/月/日格式的字符串
/// </summary>
/// <param name="dt">日期</param>
/// <returns>返回字符串类型</returns>
public static string ToCharYYYYMMDDLong(DateTime dt)
{
return dt.ToString("yyyy/MM/dd", DateTimeFormatInfo.CurrentInfo);
}

/// <summary>
/// 将日期转换为年月(YYMM)格式的字符串
/// </summary>
/// <param name="dt">日期</param>
/// <returns>返回字符串类型</returns>
public static string ToCharYYMM(DateTime dt)
{
return dt.ToString("yyMM", DateTimeFormatInfo.CurrentInfo);
}

/// <summary>
/// 将日期转换为年(YY)格式的字符串
/// </summary>
/// <param name="dt">日期</param>
/// <returns>返回字符串类型</returns>
public static string ToCharYY(DateTime dt)
{
return dt.ToString("yy", DateTimeFormatInfo.CurrentInfo);
}

/// <summary>
/// 将日期转换为年(YYYY)格式的字符串
/// </summary>
/// <param name="dt">日期</param>
/// <returns>返回字符串类型</returns>
public static string ToCharYYYY(DateTime dt)
{
return dt.ToString("yyyy", DateTimeFormatInfo.CurrentInfo);
}

/// <summary>
/// 将日期转换为年月(YYYYMM)格式的字符串
/// </summary>
/// <param name="dt">日期</param>
/// <returns>返回字符串类型</returns>
public static string ToCharYYYYMM(DateTime dt)
{
return dt.ToString("yyyyMM", DateTimeFormatInfo.CurrentInfo);
}

/// <summary>
/// 将日期转换为年月日(YYYYMMDD)格式的字符串，当日期为系统最小日期否返回空字符串
/// </summary>
/// <param name="dt">日期</param>
/// <returns>返回字符串类型</returns>
public static string ToCharYYYYMMDD(DateTime dt)
{
string temp = dt.ToString("yyyyMMdd", DateTimeFormatInfo.CurrentInfo);
if (temp == "00010101") temp = "";
return temp;
}

/// <summary>
/// 将日期转换为年月日时分秒(YYYYMMDDHHMMSS)格式的字符串
/// </summary>
/// <param name="dt">日期</param>
/// <returns>返回字符串类型</returns>
public static string ToCharYYYYMMDDHHMMSS(DateTime dt)
{
return dt.ToString("yyyyMMddHHmmss", DateTimeFormatInfo.CurrentInfo);
}

public static string ToCharYYYYMMDDHHMM(DateTime dt)
{
return dt.ToString("yyyyMMddHHmm", DateTimeFormatInfo.CurrentInfo);
}

/// <summary>
/// 将日期转换为日/月/年时:分:秒(DD/MM/YYYY HH:MM:SS)格式的字符串
/// </summary>
/// <param name="dt">日期</param>
/// <returns>返回字符串类型</returns>
public static string ToCharDD_MM_YYYY_HHMMSS(DateTime dt)
{
return dt.ToString("dd/MM/yyyy HH:mm:ss", DateTimeFormatInfo.CurrentInfo);
}

/// <summary>
/// 将日期转换为年/月/日时:分:秒(YYYY/MM/DD HH:MM:SS)格式的字符串
/// </summary>
/// <param name="dt">日期</param>
/// <returns>返回字符串类型</returns>
public static string ToCharYYYY_MM_DD_HHMMSS(DateTime dt)
{
return dt.ToString("yyyy/MM/dd HH:mm:ss", DateTimeFormatInfo.CurrentInfo);
}

/// <summary>
/// 将日期转换为年月日时:分:秒(YYYYMMDD HH:MM:SS)格式的字符串
/// </summary>
/// <param name="dt">日期</param>
/// <returns>返回字符串类型</returns>
public static string ToCharYYYYMMDDHHMMSS000(DateTime dt)
{
return dt.ToString("yyyyMMdd HH:mm:ss:000", DateTimeFormatInfo.CurrentInfo);
}

/// <summary>
/// 将日期转换为年月日(YYMMDD)格式的字符串
/// </summary>
/// <param name="dt">日期</param>
/// <returns>返回字符串类型</returns>
public static string ToCharYYMMDD(DateTime dt)
{
return dt.ToString("yyMMdd", DateTimeFormatInfo.CurrentInfo);
}

/// <summary>
/// 转换为Boolean类型
/// </summary>
/// <param name="o">必须是可转换为Boolean类型的字符串如"True","False",或其它特殊对象</param>
/// <returns>返回bool类型</returns>
public static bool ToBoolean(object o)
{
if (null == o) return false;
try
{
return Convert.ToBoolean(o.ToString());
}
catch { return false; }
}

/// <summary>
/// 转换为浮点类型
/// </summary>
/// <param name="o"></param>
/// <returns></returns>
public static float ToFloat(object o)
{
if (null == o) return 0;
try
{
return (float)Convert.ToDouble(o.ToString());
}
catch { return 0; }
}

/// <summary>
/// 转换为decimal类型(有效十进制数)
/// </summary>
/// <param name="o"></param>
/// <returns></returns>
public static decimal ToDecimal(object o)
{
if (null == o) return 0;
try
{
return Convert.ToDecimal(o.ToString());
}
catch { return 0; }
}

/// <summary>
/// 四舍五入
/// </summary>
/// <param name="d"></param>
/// <returns></returns>
public static object ToDecimalFormat(decimal d,int round,string format= "0.00")
{
return (object)(decimal.Round(d, round).ToString(format));
}

/// <summary>
/// 转换为日期对象
/// </summary>
/// <param name="o">日期对象(泛型)，如为空的字段数据DBNull.NULL</param>
/// <returns></returns>
public static DateTime ToDateTime(DateTime? o)
{
if (null == o) return DateTime.MinValue;
try
{
return DateTime.Parse(o.ToString());
}
catch { return DateTime.MinValue; }
}

/// <summary>
/// 转换为SQL支持的日期格式, 日期范围：1753-1-1 ~ 9999-12-31
/// </summary>
/// <param name="o"></param>
/// <returns></returns>
public static DateTime ToSqlDateTime(object o)
{
DateTime defMinValue = DateTime.Parse("1753-01-01 00:00:00");
DateTime defMaxValue = DateTime.Parse("9999-12-31 23:59:59");
if (null == o) return defMinValue;//传入空值，返回预设值

DateTime dt;
if (DateTime.TryParse(o.ToString(), out dt))
{
if (dt < defMinValue || dt > defMaxValue)
return defMinValue;//无效日期，预设返回SQL支持的最小日期
else
return dt;
}
return defMinValue;
}

/// <summary>
/// 转换日期字符串. 对象为空则返回'null'字符串(无单引号).
/// 用于动态组合SQL字符串.
/// </summary>
/// <param name="o">日期对象</param>
/// <param name="dateFormat">日期格式</param>
/// <param name="quotationMark">返回的日期字符串是否打上单引号</param>
public static string ToDateTimeString(object o, string dateFormat, bool quotationMark)
{
try
{
DateTime? dateGenType = ToDateTime(o);
string datestr = string.Empty;
if (dateGenType == null)
return "";
else
{
DateTime dt = DateTime.Parse(dateGenType.ToString());
datestr = dt.ToString(dateFormat, DateTimeFormatInfo.CurrentInfo);
}
if (quotationMark)
return "'" + datestr + "'";
else
return datestr;
}
catch
{
return "";
}
}

/// <summary>
/// 转换为日期对象
/// </summary>
/// <param name="o"></param>
/// <returns></returns>
public static DateTime? ToDateTime(object o)
{
if (null == o) return null;
try
{
return Convert.ToDateTime(o.ToString());
}
catch { return null; }
}

public static DateTime ToDateTimeEx(object o)
{
if (null == o) return DateTime.MinValue;
try
{
DateTime dt = Convert.ToDateTime(o.ToString());
if (dt < DateTime.Parse("1900-01-01"))
return DateTime.Parse("1900-01-01");
else
return dt;
}
catch { return DateTime.MinValue; }
}

/// <summary>
/// 转换为整数
/// </summary>
/// <param name="o"></param>
/// <returns></returns>
public static int ToInt(object o)
{
if (null == o) return 0;
try
{
return Convert.ToInt32(o.ToString());
}
catch { return 0; }
}

/// <summary>
/// 转换为字符串
/// </summary>
/// <param name="obj">当对象为空，返回string.Empty</param>
/// <returns></returns>
public static string ToString(object obj)
{
if (obj == null) return string.Empty;
return obj.ToString().Trim();
}

/// <summary>
/// 截取左侧指定长度字符串
/// </summary>
/// <param name="content">字符串</param>
/// <param name="length">长度</param>
/// <returns></returns>
public static string StrLeft(string content, int length)
{
if (String.IsNullOrEmpty(content)) return "";
if (content.Length <= length)
return content;
else
return content.Substring(0, length);
}

}

//来源:C/S框架网 | www.csframework.com | QQ:23404761

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参考文档：

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C#.Net对象内存模型及堆/栈数据结构详解 (二)
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标签：C#.Net组件开发 - 自定义设计器持久化对象的属性
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