检查 Excel 文件 Sheet 是否缺少列

Check Excel File Sheet for missing columns

我有一个 ssis 包,它接受一个 excel 文件并将其导入,但如果 sheet 中的任何列丢失,则导入失败。

我正在尝试编写一些代码来检查 sheet 中的列 header 以确保它包含一组列的列表,它不需要检查是否存在正确的列订单,只要它们存在。

目前我的代码如下

Dim strFile As String

strFile = Dts.Variables("User::found_file").Value.ToString

Dim xlConnectionString As String = "Provider=Microsoft.ACE.OLEDB.12.0;" & "Data Source=" & _
      strFile & ";Extended Properties=""Excel 12.0 XML;HDR=YES"""
Dim xlConnection As New OleDbConnection(xlConnectionString)
xlConnection.Open()

Dim tablesInFile As DataTable = xlConnection.GetSchema("TABLES")

Dim currentTable As String
Dim columnsInTable As DataTable
Dim columnRestrictions(3) As String
Dim columnInTable As DataRow
Dim currentColumn As String

For Each tableInFile As DataRow In tablesInFile.Rows

    currentTable = tableInFile.Item("TABLE_NAME").ToString


    'tray header
    If currentTable = "'Tray Header$'" Then
        columnRestrictions(2) = currentTable
        columnsInTable = xlConnection.GetSchema("COLUMNS", columnRestrictions)

     end if  
next 

我需要一种简单的方法来检查所有列以确保它们都存在,而不必执行循环并一次检查一个列。

我需要它在缺少列时将失败布尔值标记为 true。

'tray header' sheet 包含的列是托盘 ID、托盘名称、描述、数量。

您可以使用简单的 SELECT 来验证您的文件:

    Dim blnMissingColumns As Boolean = False

    Dim cmdTest As OleDbCommand = xlConnection.CreateCommand
    cmdTest.CommandText = "SELECT TOP 1 trayid, trayname, description, quantity FROM [Tray Header$]"

    Try
        cmdTest.ExecuteNonQuery()
    Catch ex As Exception
        If TypeOf ex Is OleDbException Then
            If CType(ex, OleDbException).ErrorCode = -2147217904 Then
                blnMissingColumns = True
            End If
        End If
    End Try

    cmdTest.Dispose()