最近，使用人员反应图片无法删除，跟踪进去看到代码长长的，无法直视
源代码如下
1 try 2 { 3 //string deleteprodcutid = Request["ProductID"]; 4 int deleteprodcutid = Util.TrimIntNull(Request["sysno"]); 5 int i = int.Parse(Request["i"]); 6 ProductBasicInfo deleteproductInfo = 7 Icson.BLL.Basic.ProductManager.GetInstance().LoadBasic(deleteprodcutid); 8 9 //FTP服务器用户名和密码 10 string ftpUserName = AppConfig.FTPUserName; 11 string ftpPassword = AppConfig.FTPPassword; 12 13 //图片保存路径,作为拼接图片路径用 14 string ftpProductPath50 = AppConfig.FTPProductPath50;//原图保存路径 15 string ftpProductPath100 = AppConfig.FTPProductPath100;//色图 16 string ftpProductPath160 = AppConfig.FTPProductPath160;//小图 17 string ftpProductPath330 = AppConfig.FTPProductPath330;//中图 18 string ftpProductPath800 = AppConfig.FTPProductPath800;//大图 19 20 string ftpProductPath60 = AppConfig.FTPProductPath60; 21 string ftpProductPath80 = AppConfig.FTPProductPath80; 22 string ftpProductPath120 = AppConfig.FTPProductPath120; 23 string ftpProductPath180 = AppConfig.FTPProductPath180; 24 string ftpProductPath200 = AppConfig.FTPProductPath200; 25 string ftpProductPath240 = AppConfig.FTPProductPath240; 26 string ftpProductPath460 = AppConfig.FTPProductPath460; 27 28 //图片地址全名包括路径 29 string img50 = AppConst.StringNull;//原图保存路径 30 string img100 = AppConst.StringNull;//色图 31 string img160 = AppConst.StringNull;//小图 32 string img330 = AppConst.StringNull;//中图 33 string img800 = AppConst.StringNull;//大图 34 string img60 = AppConst.StringNull; 35 string img80 = AppConst.StringNull; 36 string img120 = AppConst.StringNull; 37 string img180 = AppConst.StringNull; 38 string img200 = AppConst.StringNull; 39 string img240 = AppConst.StringNull; 40 string img460 = AppConst.StringNull; 41 string current50 = AppConst.StringNull; 42 string current100 = AppConst.StringNull; 43 string current160 = AppConst.StringNull; 44 string current330 = AppConst.StringNull; 45 string current800 = AppConst.StringNull; 46 string current60 = AppConst.StringNull; 47 string current80 = AppConst.StringNull; 48 string current120 = AppConst.StringNull; 49 string current180 = AppConst.StringNull; 50 string current200 = AppConst.StringNull; 51 string current240 = AppConst.StringNull; 52 string current460 = AppConst.StringNull; 53 54 string last50 = AppConst.StringNull; 55 string last100 = AppConst.StringNull; 56 string last160 = AppConst.StringNull; 57 string last330 = AppConst.StringNull; 58 string last800 = AppConst.StringNull; 59 60 string last60 = AppConst.StringNull; 61 string last80 = AppConst.StringNull; 62 string last120 = AppConst.StringNull; 63 string last180 = AppConst.StringNull; 64 string last200 = AppConst.StringNull; 65 string last240 = AppConst.StringNull; 66 string last460 = AppConst.StringNull; 67 68 FTPHelper fTPHelper = new FTPHelper(ftpProductPath50, ftpUserName, ftpPassword); 69 70 if (i == deleteproductInfo.MultiPicNum) 71 { 72 //处理的是显示在最后的图片 73 if (i == 1) 74 { 75 //delete剩下的唯一的图片 76 img50 = deleteprodcutid + ".jpg"; 77 img100 = deleteprodcutid + ".jpg"; 78 img160 = deleteprodcutid + ".jpg"; 79 img330 = deleteprodcutid + ".jpg"; 80 img800 = deleteprodcutid + ".jpg"; 81 82 img60 = deleteprodcutid + ".jpg"; 83 img80 = deleteprodcutid + ".jpg"; 84 img120 = deleteprodcutid + ".jpg"; 85 img180 = deleteprodcutid + ".jpg"; 86 img200 = deleteprodcutid + ".jpg"; 87 img240 = deleteprodcutid + ".jpg"; 88 img460 = deleteprodcutid + ".jpg"; 89 90 //当前图片 91 current50 = ftpProductPath50 + img50; 92 current100 = ftpProductPath100 + img100; 93 current160 = ftpProductPath160 + img160; 94 current330 = ftpProductPath330 + img330; 95 current800 = ftpProductPath800 + img800; 96 97 current60 = ftpProductPath60 + img60; 98 current80 = ftpProductPath80 + img80; 99 current120 = ftpProductPath120 + img120; 100 current180 = ftpProductPath180 + img180; 101 current200 = ftpProductPath200 + img200; 102 current240 = ftpProductPath240 + img240; 103 current460 = ftpProductPath460 + img460; 104 105 //直接delete最后的一张图片 106 //原图 107 if (!fTPHelper.DeleteFile(current50)) 108 { 109 throw new BizException("删除原图失败"); 110 } 111 112 //色图 113 if (!fTPHelper.DeleteFile(current100)) 114 { 115 throw new BizException("删除色图失败"); 116 } 117 118 //小图 119 if (!fTPHelper.DeleteFile(current160)) 120 { 121 throw new BizException("删除小图失败"); 122 } 123 124 //中图 125 if (!fTPHelper.DeleteFile(current330)) 126 { 127 throw new BizException("删除中图失败"); 128 } 129 130 //大图 131 if (!fTPHelper.DeleteFile(current800)) 132 { 133 throw new BizException("删除大图失败"); 134 } 135 136 //60*60 137 if (!fTPHelper.DeleteFile(current60)) 138 { 139 throw new BizException("删除60*60图片失败"); 140 } 141 142 //80*80 143 if (!fTPHelper.DeleteFile(current80)) 144 { 145 throw new BizException("删除80*80图片失败"); 146 } 147 148 //120*120 149 if (!fTPHelper.DeleteFile(current120)) 150 { 151 throw new BizException("删除120*120图片失败"); 152 } 153 154 //180*180 155 if (!fTPHelper.DeleteFile(current180)) 156 { 157 throw new BizException("删除180*180图片失败"); 158 } 159 160 //200*200 161 if (!fTPHelper.DeleteFile(current200)) 162 { 163 throw new BizException("删除200*200图片失败"); 164 } 165 166 //240*240 167 if (!fTPHelper.DeleteFile(current240)) 168 { 169 throw new BizException("删除240*240图片失败"); 170 } 171 172 //460*460 173 if (!fTPHelper.DeleteFile(current460)) 174 { 175 throw new BizException("删除460*460图片失败"); 176 } 177 178 } 179 else 180 { 181 //图片数量大于1，并且不是delete最后显示的图片 182 img50 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 183 img100 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 184 img160 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 185 img330 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 186 img800 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 187 188 img60 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 189 img80 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 190 img120 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 191 img180 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 192 img200 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 193 img240 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 194 img460 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 195 196 197 //当前图片 198 current50 = ftpProductPath50 + img50; 199 current100 = ftpProductPath100 + img100; 200 current160 = ftpProductPath160 + img160; 201 current330 = ftpProductPath330 + img330; 202 current800 = ftpProductPath800 + img800; 203 204 current60 = ftpProductPath60 + img60; 205 current80 = ftpProductPath80 + img80; 206 current120 = ftpProductPath120 + img120; 207 current180 = ftpProductPath180 + img180; 208 current200 = ftpProductPath200 + img200; 209 current240 = ftpProductPath240 + img240; 210 current460 = ftpProductPath460 + img460; 211 212 last50 = ftpProductPath50 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 213 last100 = ftpProductPath100 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 214 last160 = ftpProductPath160 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 215 last330 = ftpProductPath330 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 216 last800 = ftpProductPath800 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 217 218 last60 = ftpProductPath60 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 219 last80 = ftpProductPath80 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 220 last120 = ftpProductPath120 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 221 last180 = ftpProductPath180 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 222 last200 = ftpProductPath200 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 223 last240 = ftpProductPath240 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 224 last460 = ftpProductPath460 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 225 226 //原图 227 if (!fTPHelper.DeleteFile(current50)) 228 { 229 throw new BizException("删除原图失败"); 230 } 231 232 //色图 233 if (!fTPHelper.DeleteFile(current100)) 234 { 235 throw new BizException("删除色图失败"); 236 } 237 238 //小图 239 if (!fTPHelper.DeleteFile(current160)) 240 { 241 throw new BizException("删除小图失败"); 242 } 243 244 //中图 245 if (!fTPHelper.DeleteFile(current330)) 246 { 247 throw new BizException("删除中图失败"); 248 } 249 250 //大图 251 if (!fTPHelper.DeleteFile(current800)) 252 { 253 throw new BizException("删除大图失败"); 254 } 255 256 //60*60 257 if (!fTPHelper.DeleteFile(current60)) 258 { 259 throw new BizException("删除60*60图片失败"); 260 } 261 262 //80*80 263 if (!fTPHelper.DeleteFile(current80)) 264 { 265 throw new BizException("删除80*80图片失败"); 266 } 267 268 //120*120 269 if (!fTPHelper.DeleteFile(current120)) 270 { 271 throw new BizException("删除120*120图片失败"); 272 } 273 274 //180*180 275 if (!fTPHelper.DeleteFile(current180)) 276 { 277 throw new BizException("删除180*180图片失败"); 278 } 279 280 //200*200 281 if (!fTPHelper.DeleteFile(current200)) 282 { 283 throw new BizException("删除200*200图片失败"); 284 } 285 286 //240*240 287 if (!fTPHelper.DeleteFile(current240)) 288 { 289 throw new BizException("删除240*240图片失败"); 290 } 291 292 //460*460 293 if (!fTPHelper.DeleteFile(current460)) 294 { 295 throw new BizException("删除460*460图片失败"); 296 } 297 298 } 299 300 } 301 else 302 { 303 //拼接图片路径 304 if (i == 1) 305 { 306 img50 = deleteprodcutid + ".jpg"; 307 img100 = deleteprodcutid + ".jpg"; 308 img160 = deleteprodcutid + ".jpg"; 309 img330 = deleteprodcutid + ".jpg"; 310 img800 = deleteprodcutid + ".jpg"; 311 312 img60 = deleteprodcutid + ".jpg"; 313 img80 = deleteprodcutid + ".jpg"; 314 img120 = deleteprodcutid + ".jpg"; 315 img180 = deleteprodcutid + ".jpg"; 316 img200 = deleteprodcutid + ".jpg"; 317 img240 = deleteprodcutid + ".jpg"; 318 img460 = deleteprodcutid + ".jpg"; 319 } 320 else 321 { 322 img50 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 323 img100 =(i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 324 img160 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 325 img330 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 326 img800 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 327 328 img60 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 329 img80 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 330 img120 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 331 img180 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 332 img200 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 333 img240 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 334 img460 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 335 } 336 337 //当前图片 338 current50 = ftpProductPath50 + img50; 339 current100 = ftpProductPath100 + img100; 340 current160 = ftpProductPath160 + img160; 341 current330 = ftpProductPath330 + img330; 342 current800 = ftpProductPath800 + img800; 343 344 current60 = ftpProductPath60 + img60; 345 current80 = ftpProductPath80 + img80; 346 current120 = ftpProductPath120 + img120; 347 current180 = ftpProductPath180 + img180; 348 current200 = ftpProductPath200 + img200; 349 current240 = ftpProductPath240 + img240; 350 current460 = ftpProductPath460 + img460; 351 352 //最后一张图片 353 last50 = ftpProductPath50 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 354 last100 = ftpProductPath100 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 355 last160 = ftpProductPath160 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 356 last330 = ftpProductPath330 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 357 last800 = ftpProductPath800 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 358 359 last60 = ftpProductPath60 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 360 last80 = ftpProductPath80 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 361 last120 = ftpProductPath120 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 362 last180 = ftpProductPath180 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 363 last200 = ftpProductPath200 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 364 last240 = ftpProductPath240 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 365 last460 = ftpProductPath460 + (deleteproductInfo.MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 366 367 //原图 368 if (!fTPHelper.DeleteFile(current50)) 369 { 370 throw new BizException("删除原图失败"); 371 } 372 if (!fTPHelper.RenameFileName(img50,last50)) 373 { 374 throw new BizException("删除原图失败"); 375 } 376 377 //色图 378 if (!fTPHelper.DeleteFile(current100)) 379 { 380 throw new BizException("删除色图失败"); 381 } 382 if (!fTPHelper.RenameFileName(img100, last100)) 383 { 384 throw new BizException("删除色图失败"); 385 } 386 387 //小图 388 if (!fTPHelper.DeleteFile(current160)) 389 { 390 throw new BizException("删除小图失败"); 391 } 392 if (!fTPHelper.RenameFileName(img160, last160)) 393 { 394 throw new BizException("删除小图失败"); 395 } 396 397 //中图 398 if (!fTPHelper.DeleteFile(current330)) 399 { 400 throw new BizException("删除中图失败"); 401 } 402 if (!fTPHelper.RenameFileName(img330, last330)) 403 { 404 throw new BizException("删除中图失败"); 405 } 406 407 //大图 408 if (!fTPHelper.DeleteFile(current800)) 409 { 410 throw new BizException("删除大图失败"); 411 } 412 if (!fTPHelper.RenameFileName(img800, last800)) 413 { 414 throw new BizException("删除大图失败"); 415 } 416 417 //60*60 418 if (!fTPHelper.DeleteFile(current60)) 419 { 420 throw new BizException("删除60*60图片失败"); 421 } 422 if (!fTPHelper.RenameFileName(img60, last60)) 423 { 424 throw new BizException("删除60*60图片失败"); 425 } 426 427 //80*80 428 if (!fTPHelper.DeleteFile(current80)) 429 { 430 throw new BizException("删除80*80图片失败"); 431 } 432 if (!fTPHelper.RenameFileName(img80, last80)) 433 { 434 throw new BizException("删除80*80图片失败"); 435 } 436 437 //120*120 438 if (!fTPHelper.DeleteFile(current120)) 439 { 440 throw new BizException("删除120*120图片失败"); 441 } 442 if (!fTPHelper.RenameFileName(img120, last120)) 443 { 444 throw new BizException("删除120*120图片失败"); 445 } 446 447 //180*180 448 if (!fTPHelper.DeleteFile(current180)) 449 { 450 throw new BizException("删除180*180图片失败"); 451 } 452 if (!fTPHelper.RenameFileName(img180, last180)) 453 { 454 throw new BizException("删除180*180图片失败"); 455 } 456 457 //200*200 458 if (!fTPHelper.DeleteFile(current200)) 459 { 460 throw new BizException("删除200*200图片失败"); 461 } 462 if (!fTPHelper.RenameFileName(img200, last200)) 463 { 464 throw new BizException("删除200*200图片失败"); 465 } 466 467 //240*240 468 if (!fTPHelper.DeleteFile(current240)) 469 { 470 throw new BizException("删除240*240图片失败"); 471 } 472 if (!fTPHelper.RenameFileName(img240, last240)) 473 { 474 throw new BizException("删除240*240图片失败"); 475 } 476 477 //460*460 478 if (!fTPHelper.DeleteFile(current460)) 479 { 480 throw new BizException("删除460*460图片失败"); 481 } 482 if (!fTPHelper.RenameFileName(img460, last460)) 483 { 484 throw new BizException("删除460*460图片失败"); 485 } 486 487 } 488 489 deleteproductInfo.MultiPicNum--; 490 ProductManager.GetInstance().UpdateBasicInfo(deleteproductInfo); 491 492 result = "success"; 493 } 494 catch (Exception ex) 495 { 496 result = "error"; 497 }
大概500行，检查发现 fTPHelper.DeleteFile删除不存在的图片报错，将不会更新数据库。于是忽略异常，几经测试，发现有2个条件下没有更新数据库，估计代码太长，程序员忘记写了。实在无法忍耐，于是决定重构
先理清逻辑，把几个相似的字段用对象类属性表示，提取几个函数，得到代码如下
1 try 2 { 3 //string deleteprodcutid = context.Request["ProductID"]; 4 int deleteprodcutid = Util.TrimIntNull(context.Request["sysno"]); 5 int i = int.Parse(context.Request["i"]); 6 ProductBasicInfo deleteproductInfo = 7 Icson.BLL.Basic.ProductManager.GetInstance().LoadBasic(deleteprodcutid); 8 9 //FTP服务器用户名和密码 10 string ftpUserName = AppConfig.FTPUserName; 11 string ftpPassword = AppConfig.FTPPassword; 12 13 //图片保存路径,作为拼接图片路径用 14 ftpProductPath ftpPath = new ftpProductPath(); 15 16 FTPHelper fTPHelper = new FTPHelper(ftpPath.ftpProductPath50, ftpUserName, ftpPassword); 17 18 //当前图片名称 19 Img img = new Img(i, deleteprodcutid); 20 21 //当前图片和路径 22 Current cur = new Current(ftpPath, img); 23 24 //直接delete图片 25 DeleteAllFile(cur, fTPHelper); 26 27 if (i != deleteproductInfo.MultiPicNum) 28 { 29 //不是最后一张，则把最后一张的图片重命名为删掉的图片名称。 30 //最后一张图片和路径 31 Last last = new Last(ftpPath, deleteproductInfo.MultiPicNum, deleteprodcutid); 32 RenameAllFileName(img, last, fTPHelper); 33 } 34 35 deleteproductInfo.MultiPicNum--; 36 ProductManager.GetInstance().UpdateBasicInfo(deleteproductInfo); 37 38 result = "success"; 39 } 40 catch (Exception ex) 41 { 42 result = "error"; 43 } 44 45 ///46 /// 重命名图片 47 /// 48 /// 命名后名称组 49 /// 命名前名称组 50 /// ftp帮助类 51 public void RenameAllFileName(Img img, Last last, FTPHelper fTPHelper) 52 { 53 //原图 54 if (!fTPHelper.RenameFileName(img.img50, last.last50)) 55 { 56 throw new BizException("重命名原图失败"); 57 } 58 59 //色图 60 if (!fTPHelper.RenameFileName(img.img100, last.last100)) 61 { 62 throw new BizException("重命名色图失败"); 63 } 64 65 //小图 66 if (!fTPHelper.RenameFileName(img.img160, last.last160)) 67 { 68 throw new BizException("重命名小图失败"); 69 } 70 71 //中图 72 if (!fTPHelper.RenameFileName(img.img330, last.last330)) 73 { 74 throw new BizException("重命名中图失败"); 75 } 76 77 //大图 78 if (!fTPHelper.RenameFileName(img.img800, last.last800)) 79 { 80 throw new BizException("重命名大图失败"); 81 } 82 83 //60*60 84 if (!fTPHelper.RenameFileName(img.img60, last.last60)) 85 { 86 throw new BizException("重命名60*60图片失败"); 87 } 88 89 //80*80 90 if (!fTPHelper.RenameFileName(img.img80, last.last80)) 91 { 92 throw new BizException("重命名80*80图片失败"); 93 } 94 95 //120*120 96 if (!fTPHelper.RenameFileName(img.img120, last.last120)) 97 { 98 throw new BizException("重命名120*120图片失败"); 99 } 100 101 //180*180 102 if (!fTPHelper.RenameFileName(img.img180, last.last180)) 103 { 104 throw new BizException("重命名180*180图片失败"); 105 } 106 107 //200*200 108 if (!fTPHelper.RenameFileName(img.img200, last.last200)) 109 { 110 throw new BizException("重命名200*200图片失败"); 111 } 112 113 //240*240 114 if (!fTPHelper.RenameFileName(img.img240, last.last240)) 115 { 116 throw new BizException("重命名240*240图片失败"); 117 } 118 119 //460*460 120 if (!fTPHelper.RenameFileName(img.img460, last.last460)) 121 { 122 throw new BizException("重命名460*460图片失败"); 123 } 124 } 125 /// 126 /// 删除图片 127 /// 128 /// 要删除的图片（带路径） 129 /// ftp帮助类 130 public void DeleteAllFile(Current cur, FTPHelper fTPHelper) 131 { 132 //原图 133 if (!fTPHelper.DeleteFile(cur.current50)) 134 { 135 throw new BizException("删除原图失败"); 136 } 137 138 //色图 139 if (!fTPHelper.DeleteFile(cur.current100)) 140 { 141 throw new BizException("删除色图失败"); 142 } 143 144 //小图 145 if (!fTPHelper.DeleteFile(cur.current160)) 146 { 147 throw new BizException("删除小图失败"); 148 } 149 150 //中图 151 if (!fTPHelper.DeleteFile(cur.current330)) 152 { 153 throw new BizException("删除中图失败"); 154 } 155 156 //大图 157 if (!fTPHelper.DeleteFile(cur.current800)) 158 { 159 throw new BizException("删除大图失败"); 160 } 161 162 //60*60 163 if (!fTPHelper.DeleteFile(cur.current60)) 164 { 165 throw new BizException("删除60*60图片失败"); 166 } 167 168 //80*80 169 if (!fTPHelper.DeleteFile(cur.current80)) 170 { 171 throw new BizException("删除80*80图片失败"); 172 } 173 174 //120*120 175 if (!fTPHelper.DeleteFile(cur.current120)) 176 { 177 throw new BizException("删除120*120图片失败"); 178 } 179 180 //180*180 181 if (!fTPHelper.DeleteFile(cur.current180)) 182 { 183 throw new BizException("删除180*180图片失败"); 184 } 185 186 //200*200 187 if (!fTPHelper.DeleteFile(cur.current200)) 188 { 189 throw new BizException("删除200*200图片失败"); 190 } 191 192 //240*240 193 if (!fTPHelper.DeleteFile(cur.current240)) 194 { 195 throw new BizException("删除240*240图片失败"); 196 } 197 198 //460*460 199 if (!fTPHelper.DeleteFile(cur.current460)) 200 { 201 throw new BizException("删除460*460图片失败"); 202 } 203 204 } 205 206 /// 207 /// 配置文件获取ftp路径 208 /// 209 public class ftpProductPath 210 { 211 //图片保存路径,作为拼接图片路径用 212 public string ftpProductPath50 = AppConfig.FTPProductPath50;//原图保存路径 213 public string ftpProductPath100 = AppConfig.FTPProductPath100;//色图 214 public string ftpProductPath160 = AppConfig.FTPProductPath160;//小图 215 public string ftpProductPath330 = AppConfig.FTPProductPath330;//中图 216 public string ftpProductPath800 = AppConfig.FTPProductPath800;//大图 217 218 public string ftpProductPath60 = AppConfig.FTPProductPath60; 219 public string ftpProductPath80 = AppConfig.FTPProductPath80; 220 public string ftpProductPath120 = AppConfig.FTPProductPath120; 221 public string ftpProductPath180 = AppConfig.FTPProductPath180; 222 public string ftpProductPath200 = AppConfig.FTPProductPath200; 223 public string ftpProductPath240 = AppConfig.FTPProductPath240; 224 public string ftpProductPath460 = AppConfig.FTPProductPath460; 225 } 226 /// 227 /// 图片名称类 228 /// 229 public class Img 230 { 231 public Img() 232 { 233 img50 = AppConst.StringNull;//原图保存路径 234 img100 = AppConst.StringNull;//色图 235 img160 = AppConst.StringNull;//小图 236 img330 = AppConst.StringNull;//中图 237 img800 = AppConst.StringNull;//大图 238 img60 = AppConst.StringNull; 239 img80 = AppConst.StringNull; 240 img120 = AppConst.StringNull; 241 img180 = AppConst.StringNull; 242 img200 = AppConst.StringNull; 243 img240 = AppConst.StringNull; 244 img460 = AppConst.StringNull; 245 } 246 247 public Img(int i, int deleteprodcutid) 248 { 249 if (i == 1) 250 { 251 img50 = deleteprodcutid + ".jpg"; 252 img100 = deleteprodcutid + ".jpg"; 253 img160 = deleteprodcutid + ".jpg"; 254 img330 = deleteprodcutid + ".jpg"; 255 img800 = deleteprodcutid + ".jpg"; 256 257 img60 = deleteprodcutid + ".jpg"; 258 img80 = deleteprodcutid + ".jpg"; 259 img120 = deleteprodcutid + ".jpg"; 260 img180 = deleteprodcutid + ".jpg"; 261 img200 = deleteprodcutid + ".jpg"; 262 img240 = deleteprodcutid + ".jpg"; 263 img460 = deleteprodcutid + ".jpg"; 264 } 265 else 266 { 267 img50 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 268 img100 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 269 img160 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 270 img330 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 271 img800 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 272 273 img60 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 274 img80 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 275 img120 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 276 img180 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 277 img200 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 278 img240 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 279 img460 = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 280 } 281 } 282 283 public string img50;//原图保存路径 284 public string img100;//色图 285 public string img160;//小图 286 public string img330;//中图 287 public string img800;//大图 288 public string img60; 289 public string img80; 290 public string img120; 291 public string img180; 292 public string img200; 293 public string img240; 294 public string img460; 295 } 296 297 /// 298 /// 当前图片（带路径） 299 /// 300 public class Current 301 { 302 public Current() 303 { 304 current50 = AppConst.StringNull; 305 current100 = AppConst.StringNull; 306 current160 = AppConst.StringNull; 307 current330 = AppConst.StringNull; 308 current800 = AppConst.StringNull; 309 current60 = AppConst.StringNull; 310 current80 = AppConst.StringNull; 311 current120 = AppConst.StringNull; 312 current180 = AppConst.StringNull; 313 current200 = AppConst.StringNull; 314 current240 = AppConst.StringNull; 315 current460 = AppConst.StringNull; 316 } 317 318 public Current(ftpProductPath ftpPath, Img img) 319 { 320 current50 = ftpPath.ftpProductPath50 + img.img50; 321 current100 = ftpPath.ftpProductPath100 + img.img100; 322 current160 = ftpPath.ftpProductPath160 + img.img160; 323 current330 = ftpPath.ftpProductPath330 + img.img330; 324 current800 = ftpPath.ftpProductPath800 + img.img800; 325 326 current60 = ftpPath.ftpProductPath60 + img.img60; 327 current80 = ftpPath.ftpProductPath80 + img.img80; 328 current120 = ftpPath.ftpProductPath120 + img.img120; 329 current180 = ftpPath.ftpProductPath180 + img.img180; 330 current200 = ftpPath.ftpProductPath200 + img.img200; 331 current240 = ftpPath.ftpProductPath240 + img.img240; 332 current460 = ftpPath.ftpProductPath460 + img.img460; 333 } 334 335 public string current50; 336 public string current100; 337 public string current160; 338 public string current330; 339 public string current800; 340 public string current60; 341 public string current80; 342 public string current120; 343 public string current180; 344 public string current200; 345 public string current240; 346 public string current460; 347 } 348 349 /// 350 /// 最后一张图片（带路径） 351 /// 352 public class Last 353 { 354 public Last() 355 { 356 last50 = AppConst.StringNull; 357 last100 = AppConst.StringNull; 358 last160 = AppConst.StringNull; 359 last330 = AppConst.StringNull; 360 last800 = AppConst.StringNull; 361 362 last60 = AppConst.StringNull; 363 last80 = AppConst.StringNull; 364 last120 = AppConst.StringNull; 365 last180 = AppConst.StringNull; 366 last200 = AppConst.StringNull; 367 last240 = AppConst.StringNull; 368 last460 = AppConst.StringNull; 369 } 370 371 public Last(ftpProductPath ftp, int MultiPicNum, int deleteprodcutid) 372 { 373 last50 = ftp.ftpProductPath50 + (MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 374 last100 = ftp.ftpProductPath100 + (MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 375 last160 = ftp.ftpProductPath160 + (MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 376 last330 = ftp.ftpProductPath330 + (MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 377 last800 = ftp.ftpProductPath800 + (MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 378 379 last60 = ftp.ftpProductPath60 + (MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 380 last80 = ftp.ftpProductPath80 + (MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 381 last120 = ftp.ftpProductPath120 + (MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 382 last180 = ftp.ftpProductPath180 + (MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 383 last200 = ftp.ftpProductPath200 + (MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 384 last240 = ftp.ftpProductPath240 + (MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 385 last460 = ftp.ftpProductPath460 + (MultiPicNum - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 386 } 387 388 public string last50; 389 public string last100; 390 public string last160; 391 public string last330; 392 public string last800; 393 394 public string last60; 395 public string last80; 396 public string last120; 397 public string last180; 398 public string last200; 399 public string last240; 400 public string last460; 401 }
然后发现还可以进一步压缩，使用属性类换成数组，使用循环删除重命名，重构得到代码如下
1 try 2 { 3 //图片保存路径,作为拼接图片路径用，顺序不能变 4 string[] ftpPathArray ={AppConfig.FTPProductPath50,AppConfig.FTPProductPath100,AppConfig.FTPProductPath160, 5 AppConfig.FTPProductPath330,AppConfig.FTPProductPath800,AppConfig.FTPProductPath60, 6 AppConfig.FTPProductPath80,AppConfig.FTPProductPath120,AppConfig.FTPProductPath180, 7 AppConfig.FTPProductPath200,AppConfig.FTPProductPath240,AppConfig.FTPProductPath460 }; 8 9 int deleteprodcutid = Util.TrimIntNull(context.Request["sysno"]); 10 int i = int.Parse(context.Request["i"]); 11 ProductBasicInfo deleteproductInfo = 12 Icson.BLL.Basic.ProductManager.GetInstance().LoadBasic(deleteprodcutid); 13 14 //FTP服务器用户名和密码 15 string ftpUserName = AppConfig.FTPUserName; 16 string ftpPassword = AppConfig.FTPPassword; 17 18 FTPHelper fTPHelper = new FTPHelper(AppConfig.FTPProductPath50, ftpUserName, ftpPassword); 19 20 //当前图片名称 21 string imgStr; 22 if (i == 1) 23 { 24 imgStr = deleteprodcutid + ".jpg"; 25 } 26 else 27 { 28 imgStr = (i - 1).ToString() + "_" + deleteprodcutid + ".jpg"; 29 } 30 31 //当前图片和路径 32 string[] curArray = CurrentArray(ftpPathArray, imgStr); 33 34 //直接delete图片 35 DeleteAllFile(curArray, fTPHelper); 36 37 if (i != deleteproductInfo.MultiPicNum) 38 { 39 //不是最后一张，则把最后一张的图片重命名为删掉的图片名称。 40 //最后一张图片和路径 41 string[] lastArray = LastArray(ftpPathArray, deleteproductInfo.MultiPicNum, deleteprodcutid.ToString()); 42 43 RenameAllFileName(imgStr, lastArray, fTPHelper); 44 } 45 46 deleteproductInfo.MultiPicNum--; 47 ProductManager.GetInstance().UpdateBasicInfo(deleteproductInfo); 48 49 result = "success"; 50 } 51 catch (Exception ex) 52 { 53 result = "error"; 54 } 55 56 ///57 /// 当前图片带路径 数组表示 58 /// 59 /// 60 /// 61 /// 62 public string[] CurrentArray(string[] ftpPathArray, string imgStr) 63 { 64 for (int i = 0; i < ftpPathArray.Length; i++) 65 { 66 ftpPathArray[i] = ftpPathArray[i] + imgStr; 67 } 68 return ftpPathArray; 69 } 70 /// 71 /// 最后一张图片带路径 数组表示 72 /// 73 /// 74 /// 75 /// 76 /// 77 public string[] LastArray(string[] ftpPathArray, int MultiPicNum, string deleteprodcutid) 78 { 79 string picNum = (MultiPicNum - 1).ToString(); 80 for (int i = 0; i < ftpPathArray.Length; i++) 81 { 82 ftpPathArray[i] = ftpPathArray[i] + picNum.ToString() + "_" + deleteprodcutid + ".jpg"; 83 } 84 return ftpPathArray; 85 } 86 /// 87 /// 重命名图片 88 /// 89 /// 命名后名称组 90 /// 命名前名称组 91 /// ftp帮助类 92 public void RenameAllFileName(string imgStr, string[] lastArray, FTPHelper fTPHelper) 93 { 94 for (int i = 0; i < lastArray.Length; i++) 95 { 96 if (!fTPHelper.RenameFileName(imgStr, lastArray[i])) 97 { 98 throw new BizException("重命名失败:" + lastArray[i]); 99 } 100 } 101 } 102 103 /// 104 /// 删除图片 105 /// 106 /// 要删除的图片（带路径） 107 /// ftp帮助类 108 public void DeleteAllFile(string[] curArray, FTPHelper fTPHelper) 109 { 110 for (int i = 0; i < curArray.Length; i++) 111 { 112 if (!fTPHelper.DeleteFile(curArray[i])) 113 { 114 throw new BizException("删除失败:" + curArray[i]); 115 } 116 } 117 }
成功地从500行压缩到120行，而且逻辑清晰，也不会漏写代码了
总结，基础要打好，用哪种数组，还是对象属性类，是否能迭代，内部运行机制是什么，都有区分。
这里是固定的长度，不需要排序，所以直接用数组比较好。