C# 比较具有不同行数的两个数据集的表达式

我有两个数据集

这两个数据集的行数不同

我有两张小报。每个表都指向这两个不同的数据集

在一列中，我想逐行比较这两个数据集

所以我想要的是：

这是我的两个表格和我的数据集，你可以看到学生编号10、15和23在数据集2中不存在

当这种情况发生时，我想写一个0

如果使用查找表达式，则在比较每个数据集的行时会出现错误：

=IIF(Fields!Student.Value <> Lookup(Fields!Student.Value,Fields!Student.Value,Fields!Student.Value,"Dataset1"),"0","1")

=IIF（字段！Student.Value查找（字段！Student.Value，字段！Student.Value，字段！Student.Value，“数据集1”），“0”，“1”）

那个表达式会给我一个错误

这个想法（我认为）是将Student 21持久化，并对数据集1上的每个Student进行比较，当它们相等时，写入1和0，而不是相等，而是针对每一行

我不能触摸数据集，我指的是查询

如果你需要更多信息，请告诉我

编辑： 为了向您提供更多信息，我想做的是复制我在web应用程序中的代码在数据层中的作用：

            ReportsDataSet.MyDatasetRow drSchool = (ReportsDataSet.MyDatasetRow)repDset.MyDataset.Rows[0];
            string Student = drSchool.Student;
            bool firstone = true;
            bool hayApproved = false;
            bool hayNotApproved = false;
            bool hayNeedMoreStudy = false;
            bool hayFail = false;
            bool hayG5 = false;
            bool hayNC = false;

            if (repDset.MyDataset.Rows.Count > 0)
            {
                int Count = repDset.MyDataset.Rows.Count;

                for (int i = 0; i < Count; i++)
                {
                    ReportsDataSet.MyDatasetRow dr = (ReportsDataSet.MyDatasetRow)repDset.MyDataset.Rows[i];

                    if (dr.tipo.Trim() == "TOTAL" && firstone)
                    {
                        Student = dr.Student;
                        firstone = false;

                        switch (dr.categoria.Trim())
                        {
                            case "Approved":
                                hayApproved = true;
                                break;
                            case "NotApproved":
                                hayNotApproved = true;
                                break;
                            case "NeedMoreStudy":
                                hayNeedMoreStudy = true;
                                break;
                            case "Fail":
                                hayFail = true;
                                break;
                            case "G5":
                                hayG5 = true;
                                break;
                            case "N/C":
                                hayNC = true;
                                break;
                        }
                    }
                    else
                    {
                        if (dr.tipo.Trim() == "TOTAL" && dr.Student == Student)
                        {
                            switch (dr.categoria.Trim())
                            {
                                case "Approved":
                                    hayApproved = true;
                                    break;
                                case "NotApproved":
                                    hayNotApproved = true;
                                    break;
                                case "NeedMoreStudy":
                                    hayNeedMoreStudy = true;
                                    break;
                                case "Fail":
                                    hayFail = true;
                                    break;
                                case "G5":
                                    hayG5 = true;
                                    break;
                                case "N/C":
                                    hayNC = true;
                                    break;
                            }
                        }
                    }

                    if (dr.Student != Student || i == (Count-1) )
                    {
                        if (!hayApproved)
                        {
                            repDset.MyDataset.AddMyDatasetRow(Student, "Approved", "TOTAL", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0");
                            Alreadyfilled++;
                        }

                        if (!hayNotApproved)
                        {
                            repDset.MyDataset.AddMyDatasetRow(Student, "NotApproved", "TOTAL", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0");
                            Alreadyfilled++;
                        }

                        if (!hayNeedMoreStudy)
                        {
                            repDset.MyDataset.AddMyDatasetRow(Student, "NeedMoreStudy", "TOTAL", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0");
                            Alreadyfilled++;
                        }

                        if (!hayFail)
                        {
                            repDset.MyDataset.AddMyDatasetRow(Student, "Fail", "TOTAL", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0");
                            Alreadyfilled++;
                        }

                        if (!hayG5)
                        {
                            repDset.MyDataset.AddMyDatasetRow(Student, "G5", "TOTAL", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0");
                            Alreadyfilled++;
                        }

                        if (!hayNC)
                        {
                            repDset.MyDataset.AddMyDatasetRow(Student, "N/C", "TOTAL", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0");
                            Alreadyfilled++;
                        }

                        if (!hayApproved && !hayNotApproved && !hayNeedMoreStudy && !hayFail && !hayG5 && !hayNC)
                        {
                            repDset.MyDataset.AddMyDatasetRow(Student, "TOTAL", "TOTAL", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0", "0");
                            Alreadyfilled++;
                        }

                        repDset.MyDataset.AcceptChanges();

                        hayApproved = false;
                        hayNotApproved = false;
                        hayNeedMoreStudy = false;
                        hayFail = false;
                        hayG5 = false;
                        hayNC = false;
                        firstone = true;

                        if (i != (Count - 1))
                        {
                            Student = dr.Student;
                            i--;
                        }
                    }
                }
            }

ReportsDataSet.MyDatasetRow drSchool=（ReportsDataSet.MyDatasetRow）repDset.MyDataset.Rows[0]；
字符串Student=drSchool.Student；
bool firstone=true；
bool=false；
bool hayNotApproved=假；
bool-haynedmorestudy=false；
bool-hayFail=false；
bool-hayG5=假；
bool-hayNC=false；
如果（repDset.MyDataset.Rows.Count>0）
{
int Count=repDset.MyDataset.Rows.Count；
for（int i=0；i=IIF(
    IsNothing(Lookup(Fields!Student.Value, Fields!Student.Value, Fields!Student.Value, "Dataset1")),
    0,
    Lookup(Fields!Student.Value, Fields!Student.Value, Fields!Student.Value, "Dataset1")
)

=IIF(
    IsNothing(Lookup(Fields!Student.Value, Fields!Student.Value, Fields!Student.Value, "Dataset1")),
    0,
    1
)

 id  |  label
-----+-----------
  1  |  Student1-a
  2  |  Student2-a
  3  |  Student3-a
  4  |  Student4-a
...
 25  |  Student25-a

 id  |  label
-----+-----------
  1  |  Student1-b
  5  |  Student5-b
 10  |  Student10-b
 12  |  Student12-b
...
 25  |  Student25-b

=IIF(
    IsNothing(Lookup(Fields!id.Value, Fields!id.Value, Fields!label.Value, "DataSet2")),
    0,
    Lookup(Fields!id.Value, Fields!id.Value, Fields!label.Value, "DataSet2")
)