C# ds和addRecords，我试过用谷歌搜索，但失败了。事实上这是可能的，但我不知道你以后会如何区分它们。太棒了，代码运行得很好，谢谢@Ivan Stoevi想要添加状态栏如果newRecod那么状态将是newRecord如果更新记录那么状态更新记录，ad

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ds和addRecords，我试过用谷歌搜索，但失败了。事实上这是可能的，但我不知道你以后会如何区分它们。太棒了，代码运行得很好，谢谢@Ivan Stoevi想要添加状态栏如果newRecod那么状态将是newRecord如果更新记录那么状态更新记录，addOrUpdateRecords是否可以在最后一个查询（单个查询）中记录一个查询，最后您会得到该信息，因此，例如，您可以执行类似以下操作：

select new{Record=drNew，Status=drOld==null？StatusEnum.new:StatusEnum.Updated}

上面的代码运行良好，我们可以对updateRecords和addRecords进行公共linq查询吗，我试过用谷歌搜索，但失败了。事实上这是可能的，但我不知道你以后会如何区分它们。太棒了，代码运行得很好，谢谢@Ivan Stoevi想要添加状态栏如果newRecod那么状态将是newRecord如果更新记录那么状态更新记录，addOrUpdateRecords是否可以在最后一次查询（单个查询）中记录一个查询，最后您会得到该信息，例如，您可以执行类似于

select new{Record=drNew，Status=drOld==null？StatusEnum.new:StatusEnum.Updated}

 DataTable dt1 = new DataTable("Table1");
    dt1.Columns.Add("Id",typeof(int)); 
    dt1.Columns.Add("Name");
    dt1.Columns.Add("Occupation");

    DataTable dt2 = new DataTable("Table2");
    dt2.Columns.Add("Id",typeof(int));
    dt2.Columns.Add("Name");
    dt2.Columns.Add("Occupation");

    DataTable Final = dt1.AsEnumerable()
                         .Except(dt2.AsEnumerable(), DataRowComparer.Default)
                         .CopyToDataTable();

[I need the result to be like this][1]

  [1]: http://i.stack.imgur.com/brqCF.jpg


new Code : 







DataTable dtFinal = new DataTable();

        DataTable dtNew = new DataTable();
        dtNew.Columns.Add("Id");
        dtNew.Columns.Add("Name");
        dtNew.Rows.Add("1", "Yash Fale");
        dtNew.Rows.Add("3", "Rahul");


        DataTable dtOld = new DataTable();
        dtOld.Columns.Add("Id");
        dtOld.Columns.Add("Name");
        dtOld.Rows.Add("1", "Yash");
        dtOld.Rows.Add("2", "pops");


        var addOrUpdateRecords =
                                (from drNew in dtNew.AsEnumerable()
                                 join drOld in dtOld.AsEnumerable() on drNew.Field<string>("Id") equals drOld.Field<string>("Id") into match
                                 from drOld in match.DefaultIfEmpty()
                                 where drOld == null /* new */ || !DataRowComparer.Default.Equals(drNew, drOld) /* changed */
                                 select drNew).ToList();
            if (addOrUpdateRecords.Any())
                dtFinal = addOrUpdateRecords.CopyToDataTable();

        // i want to add new column like as Status for below condition 
        // for added Records = status : newRecord
        // for updated Records = status : UpdatedRecord


        //OutPut : ie. dtFinal
        // ID Name Status
        //  1  Yash Fale UpdatedRecord
        //  3  Rahul     newRecord

var addRecords =
    (from drNew in dtNew.AsEnumerable()
     join drOld in dtOld.AsEnumerable() on drNew.Field<int>("Id") equals drOld.Field<int>("Id") into match
     where !match.Any()
     select drNew).ToList();

var dtAdd = addRecords.Any() ? addRecords.CopyToDataTable() : null;

var deleteRecords =
    (from drOld in dtOld.AsEnumerable()
     join drNew in dtNew.AsEnumerable() on drOld.Field<int>("Id") equals drNew.Field<int>("Id") into match
     where !match.Any()
     select drOld).ToList();

var updateRecords =
    (from drNew in dtNew.AsEnumerable()
     join drOld in dtOld.AsEnumerable() on drNew.Field<int>("Id") equals drOld.Field<int>("Id")
     where !DataRowComparer.Default.Equals(drNew, drOld)
     select drNew).ToList();

var addOrUpdateRecords =
    (from drNew in dtNew.AsEnumerable()
     join drOld in dtOld.AsEnumerable() on drNew.Field<int>("Id") equals drOld.Field<int>("Id") into match
     from drOld in match.DefaultIfEmpty()
     where drOld == null /* new */ || !DataRowComparer.Default.Equals(drNew, drOld) /* changed */
     select drNew).ToList();