本文介绍了如何将Excel数据与SQL进行比较并删除重复记录使用Linq的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 29岁程序员,3月因学历无情被辞! 美好的一天,我几乎没有问题删除重复的记录 首先,我希望能够将excel的记录与SQL的记录进行比较,如果相同,则将删除。 。我如何实现以下目标是如何使用linq导入到sql的代码 尝试 { string Pat = string 。 Concat(Server.MapPath( 〜/ FileUpload / + FileUpload1.FileName)); FileUpload1.SaveAs(Pat); string PathToExcelFile = Pat; var ExcelFile = new ExcelQueryFactory(PathToExcelFile); ExcelFile.AddMapping<问题>(x = > x.QuestionOrder, QuestionNo); ExcelFile.AddMapping<问题>(x = > x.Title, 问题); ExcelFile.AddMapping<问题>(x = > x.Answer1, A); ExcelFile.TrimSpaces = LinqToExcel.Query.TrimSpacesType.Both; ExcelFile.ReadOnly = true ; IQueryable<问题> Quest =( from c ExcelFile.Worksheet< Question>()选择 c); foreach (问题qu 在 Quest中) { cdc。 Questions.Add(曲); cdc.SaveChanges(); lblmess.Text = 成功导入; } } catch (例外情况) { lblmess.Text = ex.Message; } 非常感谢..我真的很感激你的时间和精力。解决方案 将Excel数据导入sql表(主表的副本),然后执行与主表的连接以选择匹配的记录。< br /> 并在每次上传时截断此Relica表excel文件。 Good Day all, I am having little issue removing duplicate recordFirst I want to be able to compare the record from excel to that of the SQL, if the same, one will be deleted.. How do i please achieve that below is the code on how to import to sql using linq try { string Pat = string.Concat(Server.MapPath("~/FileUpload/" + FileUpload1.FileName)); FileUpload1.SaveAs(Pat); string PathToExcelFile = Pat; var ExcelFile = new ExcelQueryFactory(PathToExcelFile); ExcelFile.AddMapping<Question>(x => x.QuestionOrder, "QuestionNo"); ExcelFile.AddMapping<Question>(x => x.Title, "Question"); ExcelFile.AddMapping<Question>(x => x.Answer1, "A"); ExcelFile.TrimSpaces = LinqToExcel.Query.TrimSpacesType.Both; ExcelFile.ReadOnly = true; IQueryable<Question> Quest = (from c in ExcelFile.Worksheet<Question>() select c); foreach (Question qu in Quest) { cdc.Questions.Add(qu); cdc.SaveChanges();lblmess.Text = "Imported Successfully"; } } catch(Exception ex) { lblmess.Text = ex.Message; }Thank you very much.. I really do appreciate your time and effort. 解决方案 Import Excel data to sql table(replica of main table) then perform join with main table to select matched record.<br />and truncate this Relica table every time when u upload excel file. 这篇关于如何将Excel数据与SQL进行比较并删除重复记录使用Linq的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持! 上岸,阿里云!
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