C#类型转换工具类

using System; namespace Com.AppCode.Extend { public static partial class Ext { #region 数值转换 /// <summary> /// 转换为整型 /// </summary> /// <param name="data">数据</param> public static int ToInt(this object data) { if (data == null) return 0; if (data is Enum) return (int)data; int result; var success = int.TryParse(data.ToString(), out result); if (success) return result; try { return Convert.ToInt32(ToDouble(data, 0)); } catch (Exception) { return 0; } } /// <summary> /// 转换为可空整型 /// </summary> /// <param name="data">数据</param> public static int? ToIntOrNull(this object data) { if (data == null) return null; int result; bool isValid = int.TryParse(data.ToString(), out result); if (isValid) return result; return null; } /// <summary> /// 转换为双精度浮点数 /// </summary> /// <param name="data">数据</param> public static double ToDouble(this object data) { if (data == null) return 0; double result; return double.TryParse(data.ToString(), out result) ? result : 0; } /// <summary> /// 转换为双精度浮点数,并按指定的小数位4舍5入 /// </summary> /// <param name="data">数据</param> /// <param name="digits">小数位数</param> public static double ToDouble(this object data, int digits) { return Math.Round(ToDouble(data), digits); } /// <summary> /// 转换为可空双精度浮点数 /// </summary> /// <param name="data">数据</param> public static double? ToDoubleOrNull(this object data) { if (data == null) return null; double result; bool isValid = double.TryParse(data.ToString(), out result); if (isValid) return result; return null; } /// <summary> /// 转换为高精度浮点数 /// </summary> /// <param name="data">数据</param> public static decimal ToDecimal(this object data) { if (data == null) return 0; decimal result; return decimal.TryParse(data.ToString(), out result) ? result : 0; } /// <summary> /// 转换为高精度浮点数,并按指定的小数位4舍5入 /// </summary> /// <param name="data">数据</param> /// <param name="digits">小数位数</param> public static decimal ToDecimal(this object data, int digits) { return Math.Round(ToDecimal(data), digits); } /// <summary> /// 转换为可空高精度浮点数 /// </summary> /// <param name="data">数据</param> public static decimal? ToDecimalOrNull(this object data) { if (data == null) return null; decimal result; bool isValid = decimal.TryParse(data.ToString(), out result); if (isValid) return result; return null; } /// <summary> /// 转换为可空高精度浮点数,并按指定的小数位4舍5入 /// </summary> /// <param name="data">数据</param> /// <param name="digits">小数位数</param> public static decimal? ToDecimalOrNull(this object data, int digits) { var result = ToDecimalOrNull(data); if (result == null) return null; return Math.Round(result.Value, digits); } #endregion #region 日期转换 /// <summary> /// 转换为日期 /// </summary> /// <param name="data">数据</param> public static DateTime ToDate(this object data) { if (data == null) return DateTime.MinValue; DateTime result; return DateTime.TryParse(data.ToString(), out result) ? result : DateTime.MinValue; } /// <summary> /// 转换为可空日期 /// </summary> /// <param name="data">数据</param> public static DateTime? ToDateOrNull(this object data) { if (data == null) return null; DateTime result; bool isValid = DateTime.TryParse(data.ToString(), out result); if (isValid) return result; return null; } #endregion #region 布尔转换 /// <summary> /// 转换为布尔值 /// </summary> /// <param name="data">数据</param> public static bool ToBool(this object data) { if (data == null) return false; bool? value = GetBool(data); if (value != null) return value.Value; bool result; return bool.TryParse(data.ToString(), out result) && result; } /// <summary> /// 获取布尔值 /// </summary> private static bool? GetBool(this object data) { switch (data.ToString().Trim().ToLower()) { case "0": return false; case "1": return true; case "是": return true; case "否": return false; case "yes": return true; case "no": return false; default: return null; } } /// <summary> /// 转换为可空布尔值 /// </summary> /// <param name="data">数据</param> public static bool? ToBoolOrNull(this object data) { if (data == null) return null; bool? value = GetBool(data); if (value != null) return value.Value; bool result; bool isValid = bool.TryParse(data.ToString(), out result); if (isValid) return result; return null; } #endregion #region 字符串转换 /// <summary> /// 转换为字符串 /// </summary> /// <param name="data">数据</param> public static string ToString(this object data) { return data == null ? string.Empty : data.ToString().Trim(); } #endregion /// <summary> /// 安全返回值 /// </summary> /// <param name="value">可空值</param> public static T SafeValue<T>(this T? value) where T : struct { return value ?? default(T); } /// <summary> /// 是否为空 /// </summary> /// <param name="value">值</param> public static bool IsEmpty(this string value) { return string.IsNullOrWhiteSpace(value); } /// <summary> /// 是否为空 /// </summary> /// <param name="value">值</param> public static bool IsEmpty(this Guid? value) { if (value == null) return true; return IsEmpty(value.Value); } /// <summary> /// 是否为空 /// </summary> /// <param name="value">值</param> public static bool IsEmpty(this Guid value) { if (value == Guid.Empty) return true; return false; } /// <summary> /// 是否为空 /// </summary> /// <param name="value">值</param> public static bool IsEmpty(this object value) { if (value != null && !string.IsNullOrEmpty(value.ToString())) { return false; } else { return true; } } } }