主题：导入校验

Dim xxmc As String = user.group
Dim dlg As New OpenFileDialog
dlg.Filter = "Excel|*.xls;*.xlsx;*.csv"
If dlg.ShowDialog = DialogResult.OK Then
    Dim Book As New XLS.Book(dlg.filename)
    Dim Sheet As XLS.Sheet = Book.Sheets(0)
    Dim bj1 As Integer
    Dim xm1 As Integer
    Dim bsm1 As Integer
    Dim sfzjh1 As Integer
    Dim csrq As Integer = -1
    Dim p As WinForm.ProgressBar
    p = e.Form.Controls("ProgressBar1")
    p.Maximum = sheet.Rows.Count-1 '设置最大值
    p.Minimum = 0 '设置最小值
    p.Value = 0 '设置当前值
    Dim s1 As new List(of String)
    For m As Integer = 0 To sheet.Cols.count -1
        If Tables("学生信息").Cols.Contains(sheet(0,m).value) = False Then
            s1.add(sheet(0,m).value)
        End If
    Next
    If s1.count >0
        Dim yw As String
        For yw1 As Integer =0 To s1.count-1
            yw = yw & s1(yw1) & "列  "
        Next
        messagebox.show("请注意,你的样表表头存在" & s1.count &" 处错误,分别是:" & yw & " 请返回修改后再重新导入","提示" )
        Return
    End If
   
   
    For i As Integer = 0 To sheet.Cols.count -1
        If sheet(0,i).value = "班级"
            bj1 =i
        End If
        If sheet(0,i).value = "学生姓名"
            xm1 = i
        End If
        If sheet(0,i).value = "身份证件号"
            sfzjh1 = i
        End If
        If sheet(0,i).value ="出生日期"
            csrq = i
        End If
    Next
   
   
    For n1 As Integer = 1 To Sheet.Rows.Count -1
        If sheet(n1,bj1).value.Substring(0,2) <> "初中" Or sheet(n1,bj1).value.Substring(0,2) <> "小学"
            messagebox.show("请注意,你的班级列中   第" & n1 & "行   有不规范内容,正确格式应为初中20XX级X班或小学20XX级X班","错误提示",MessageBoxButtons.OK)
            Return
        End If
    Next
  
    
   
    '   Tables("学生信息").StopRedraw()
    For n As Integer = 1 To Sheet.Rows.Count -1
        Dim bj As String = sheet(n,bj1).value.replace(" ","").replace(chr(9),"")
        Dim xm As String = sheet(n,xm1).value.replace(" ","").replace(chr(9),"")
        Dim sfzjh As String = sheet(n,sfzjh1).value.replace(" ","").replace(chr(9),"")
        Dim dr As DataRow = DataTables("学生信息").sqlFind("班级 = '" & bj & "'and 学校名称 = '" & xxmc & "' And 学生姓名 = '" & xm & "' and 身份证件号 = '" & sfzjh & "'")
        If dr Is Nothing Then '如果不存在同考号的行
            dr =  DataTables("学生信息").AddNew()
        End If
        For m As Integer = 0 To sheet.Cols.count -1
            If sheet(0,m).value IsNot Nothing AndAlso Tables("学生信息").Cols.Contains(sheet(0,m).value) Then
                If m = csrq
                    dr(sheet(0,m).value) = Nothing
                Else
                    dr(sheet(0,m).value) = Sheet(n,m).Value.replace(" ","").replace(chr(9),"")
                    dr("状态") = "在读:原籍在读"
                    If dr("学校名称") = ""
                        dr("学校名称") = xxmc
                    End If
                End If
            End If
        Next
        p.Value = n
    Next
    '   Tables("学生信息").ResumeRedraw()
    For Each r As Row In Tables("学生信息").Rows
        For Each c As Col In Tables("学生信息").Cols
            If r.IsNull(c.Name) =  False AndAlso c.IsString Then
                r(c.Name) = r(c.Name).replace(" ","")
                r(c.Name) = r(c.Name).replace(chr(9),"")
            End If
           
        Next
    Next
    DataTables("学生信息").DataCols("身份证件号").RaiseDataColChanged()
    DataTables("学生信息").DataCols("班级").RaiseDataColChanged()
    DataTables("学生信息").save()
    Dim cmd As New SQLCommand
    Dim dt As DataTable
    cmd.c区业务主管")
        cmd.CommandText = "SELEC  T DISTINCT 学校名称, 年级, 班级  From {学生信息} "
    Else
        cmd.CommandText = "SELEC T   DISTINCT 学校名称, 年级, 班级  From {学生信息} where 学校名称 = '" & xxmc & "'"
    End If
    dt = cmd.ExecuteReader()
    Dim trv As WinForm.TreeView = Forms("学生信息").Controls("TreeView1")
    trv.BuildTree(dt,"学校名称|年级|班级")
End If

老师，请教一下上面蓝色部分是想先校验EXCl 表中有不有与table不一致的字段，红色是想校验下主要列班级的写法。

1、现在执行messagebox.show返回都是第1行有错，试验是第一行格式对了的。请问怎么改？如何检验更好

2、如果导入过程中发现错误，如何用代码终止进程

3、如果终止导入后，如何撤销添加的的部分记录，现在的情况是发现有错，不能终止，导完了后又只有删除记录