字符串、数值 等类型的相互 安全转换
转换方法代码：
1 #region SafeParse 2 public static bool SafeParseBool(object target, bool defaultValue) 3 { 4 if (target == null) return defaultValue; 5 string tmp = target.ToString(); if (string.IsNullOrWhiteSpace(tmp)) return defaultValue; 6 return SafeParseBool(tmp, defaultValue); 7 } 8 public static bool SafeParseBool(string text, bool defaultValue) 9 { 10 bool flag; 11 if (bool.TryParse(text, out flag)) 12 { 13 defaultValue = flag; 14 } 15 return defaultValue; 16 } 17 18 public static DateTime SafeParseDateTime(object target, DateTime defaultValue) 19 { 20 if (target == null) return defaultValue; 21 string tmp = target.ToString(); if (string.IsNullOrWhiteSpace(tmp)) return defaultValue; 22 return SafeParseDateTime(tmp, defaultValue); 23 } 24 public static DateTime SafeParseDateTime(string text, DateTime defaultValue) 25 { 26 DateTime time; 27 if (DateTime.TryParse(text, out time)) 28 { 29 defaultValue = time; 30 } 31 return defaultValue; 32 } 33 34 public static decimal SafeParseDecimal(object target, decimal defaultValue) 35 { 36 if (target == null) return defaultValue; 37 string tmp = target.ToString(); if (string.IsNullOrWhiteSpace(tmp)) return defaultValue; 38 return SafeParseDecimal(tmp, defaultValue); 39 } 40 public static decimal SafeParseDecimal(string text, decimal defaultValue) 41 { 42 decimal num; 43 if (decimal.TryParse(text, out num)) 44 { 45 defaultValue = num; 46 } 47 return defaultValue; 48 } 49 50 public static short SafeParseShort(object target, short defaultValue) 51 { 52 if (target == null) return defaultValue; 53 string tmp = target.ToString(); if (string.IsNullOrWhiteSpace(tmp)) return defaultValue; 54 return SafeParseShort(tmp, defaultValue); 55 } 56 public static short SafeParseShort(string text, short defaultValue) 57 { 58 short num; 59 if (short.TryParse(text, out num)) 60 { 61 defaultValue = num; 62 } 63 return defaultValue; 64 } 65 66 public static int SafeParseInt(object target, int defaultValue) 67 { 68 if (target == null) return defaultValue; 69 string tmp = target.ToString(); if (string.IsNullOrWhiteSpace(tmp)) return defaultValue; 70 return SafeParseInt(tmp, defaultValue); 71 } 72 public static int SafeParseInt(string text, int defaultValue) 73 { 74 int num; 75 if (int.TryParse(text, out num)) 76 { 77 defaultValue = num; 78 } 79 return defaultValue; 80 } 81 public static int[] SafeParseInt(string[] text, int defaultValue) 82 { 83 if (text == null || text.Length < 1) return new[] { defaultValue }; 84 85 int[] nums = new int[text.Length]; 86 int tmp; 87 for (int i = 0; i < text.Length; i++) 88 { 89 if (int.TryParse(text[i], out tmp)) nums[i] = tmp; 90 else nums[i] = defaultValue; 91 } 92 return nums; 93 } 94 public static string SafeParseIntFilter(string text, int defaultValue, char split = ',') 95 { 96 if (string.IsNullOrWhiteSpace(text)) return defaultValue.ToString(CultureInfo.InvariantCulture); 97 string[] tmpSplit = text.Split(new[] { split }, StringSplitOptions.RemoveEmptyEntries); 98 if (tmpSplit.Length < 1) return defaultValue.ToString(CultureInfo.InvariantCulture); 99 100 int tmp; 101 for (int i = 0; i < tmpSplit.Length; i++) 102 { 103 if (int.TryParse(tmpSplit[i], out tmp)) 104 tmpSplit[i] = tmp.ToString(CultureInfo.InvariantCulture); 105 else 106 tmpSplit[i] = defaultValue.ToString(CultureInfo.InvariantCulture); 107 } 108 return string.Join(split.ToString(CultureInfo.InvariantCulture), tmpSplit); 109 } 110 111 public static long SafeParseLong(object target, long defaultValue) 112 { 113 if (target == null) return defaultValue; 114 string tmp = target.ToString(); if (string.IsNullOrWhiteSpace(tmp)) return defaultValue; 115 if (string.IsNullOrWhiteSpace(tmp)) return defaultValue; 116 return SafeParseLong(tmp, defaultValue); 117 } 118 public static long SafeParseLong(string text, long defaultValue) 119 { 120 long num; 121 if (long.TryParse(text, out num)) 122 { 123 defaultValue = num; 124 } 125 return defaultValue; 126 } 127 128 public static long[] SafeParseLong(string[] text, long defaultValue) 129 { 130 if (text == null || text.Length < 1) return new[] { defaultValue }; 131 132 long[] nums = new long[text.Length]; 133 long tmp; 134 for (int i = 0; i < text.Length; i++) 135 { 136 if (long.TryParse(text[i], out tmp)) nums[i] = tmp; 137 else nums[i] = defaultValue; 138 } 139 return nums; 140 } 141 142 public static string SafeParseLongFilter(string text, long defaultValue, char split = ',') 143 { 144 if (string.IsNullOrWhiteSpace(text)) return defaultValue.ToString(CultureInfo.InvariantCulture); 145 string[] tmpSplit = text.Split(new[] { split }, StringSplitOptions.RemoveEmptyEntries); 146 if (tmpSplit.Length < 1) return defaultValue.ToString(CultureInfo.InvariantCulture); 147 148 long tmp; 149 for (int i = 0; i < tmpSplit.Length; i++) 150 { 151 if (long.TryParse(tmpSplit[i], out tmp)) 152 tmpSplit[i] = tmp.ToString(CultureInfo.InvariantCulture); 153 else 154 tmpSplit[i] = defaultValue.ToString(CultureInfo.InvariantCulture); 155 } 156 return string.Join(split.ToString(CultureInfo.InvariantCulture), tmpSplit); 157 } 158 159 public static string SafeParseString(object target, string defaultValue) 160 { 161 if (null != target && "" != target.ToString()) 162 { 163 return target.ToString(); 164 } 165 return defaultValue; 166 } 167 168 #region SafeParseNullParse 169 public static bool? SafeParseBool(object target, bool? defaultValue) 170 { 171 if (target == null) return defaultValue; 172 string tmp = target.ToString(); 173 if (string.IsNullOrWhiteSpace(tmp)) return defaultValue; 174 return SafeParseBool(tmp, defaultValue); 175 } 176 public static bool? SafeParseBool(string text, bool? defaultValue) 177 { 178 bool flag; 179 if (bool.TryParse(text, out flag)) 180 { 181 defaultValue = flag; 182 } 183 return defaultValue; 184 } 185 186 public static DateTime? SafeParseDateTime(object target, DateTime? defaultValue) 187 { 188 if (target == null) return defaultValue; 189 string tmp = target.ToString(); 190 if (string.IsNullOrWhiteSpace(tmp)) return defaultValue; 191 return SafeParseDateTime(tmp, defaultValue); 192 } 193 public static DateTime? SafeParseDateTime(string text, DateTime? defaultValue) 194 { 195 DateTime time; 196 if (DateTime.TryParse(text, out time)) 197 { 198 defaultValue = time; 199 } 200 return defaultValue; 201 } 202 203 public static decimal? SafeParseDecimal(object target, decimal? defaultValue) 204 { 205 if (target == null) return defaultValue; 206 string tmp = target.ToString(); 207 if (string.IsNullOrWhiteSpace(tmp)) return defaultValue; 208 return SafeParseDecimal(tmp, defaultValue); 209 } 210 public static decimal? SafeParseDecimal(string text, decimal? defaultValue) 211 { 212 decimal num; 213 if (decimal.TryParse(text, out num)) 214 { 215 defaultValue = num; 216 } 217 return defaultValue; 218 } 219 220 public static short? SafeParseShort(object target, short? defaultValue) 221 { 222 if (target == null) return defaultValue; 223 string tmp = target.ToString(); 224 if (string.IsNullOrWhiteSpace(tmp)) return defaultValue; 225 return SafeParseShort(tmp, defaultValue); 226 } 227 public static short? SafeParseShort(string text, short? defaultValue) 228 { 229 short num; 230 if (short.TryParse(text, out num)) 231 { 232 defaultValue = num; 233 } 234 return defaultValue; 235 } 236 237 public static int? SafeParseInt(object target, int? defaultValue) 238 { 239 if (target == null) return defaultValue; 240 string tmp = target.ToString(); 241 if (string.IsNullOrWhiteSpace(tmp)) return defaultValue; 242 return SafeParseInt(tmp, defaultValue); 243 } 244 public static int? SafeParseInt(string text, int? defaultValue) 245 { 246 int num; 247 if (int.TryParse(text, out num)) 248 { 249 defaultValue = num; 250 } 251 return defaultValue; 252 } 253 254 public static long? SafeParseLong(object target, long? defaultValue) 255 { 256 if (target == null) return defaultValue; 257 string tmp = target.ToString(); 258 if (string.IsNullOrWhiteSpace(tmp)) return defaultValue; 259 return SafeParseLong(tmp, defaultValue); 260 } 261 public static long? SafeParseLong(string text, long? defaultValue) 262 { 263 long num; 264 if (long.TryParse(text, out num)) 265 { 266 defaultValue = num; 267 } 268 return defaultValue; 269 } 270 #endregion 271 272 #region SafeParseEnum 273 /// <summary> 274 /// 将枚举数值or枚举名称 安全转换为枚举对象 275 /// </summary> 276 /// <typeparam name="T">枚举类型</typeparam> 277 /// <param name="value">数值or名称</param> 278 /// <param name="defaultValue">默认值</param> 279 /// <remarks>转换区分大小写</remarks> 280 /// <returns></returns> 281 public static T SafeParseEnum<T>(string value, T defaultValue) where T : struct 282 { 283 return SafeParseEnum<T>(value, defaultValue, false); 284 } 285 286 /// <summary> 287 /// 将枚举数值or枚举名称 安全转换为枚举对象 288 /// </summary> 289 /// <typeparam name="T">枚举类型</typeparam> 290 /// <param name="value">数值or名称</param> 291 /// <param name="defaultValue">默认值</param> 292 /// <param name="ignoreCase">是否忽略大小写 true 不区分大小写 | false 区分大小写</param> 293 /// <returns></returns> 294 public static T SafeParseEnum<T>(string value, T defaultValue, bool ignoreCase) where T : struct 295 { 296 T result; 297 if (Enum.TryParse<T>(value, ignoreCase, out result)) 298 { 299 if (Enum.IsDefined(typeof(T), result)) 300 { 301 defaultValue = result; 302 } 303 } 304 return defaultValue; 305 } 306 #endregion 307 308 #endregion
