阅读多个Excel表格中的一个列表视图

Question 1

我试图阅读excel文件，该文件已多次表1,2,3,4,5,6,7,8,9,10

我需要读多个列什么是在这些片例如从范围a1：a20和c1：c20

结果是列出它在一个列表视图，我尝试了几个建议中出现的论坛，但它只允许我宣读一片和我需要读好几在同一时间。无论如何我放的代码，我在使用。

在此先感谢

Public Class Frm_ImportarLibro
    Public Function Obtenerdatos(ByVal ruta As String, ByVal hoja As String, ByVal rango As String) As DataTable


        Dim cadenaConexion As String = "Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties='Excel 8.0;HDR=NO';" &
                                       "Data Source=" & ruta


        Using cnn As New OleDbConnection(cadenaConexion)


            Dim cmd As OleDbCommand = cnn.CreateCommand()
            cmd.CommandText = String.Format("SELECT * FROM [{0}${1}]", hoja, rango)
            Dim da As New OleDbDataAdapter(cmd)
            Dim dtTemp As New DataTable("Prueba")
            da.Fill(dtTemp)
            Dim dt As DataTable = dtTemp.Clone()
            Dim rows As DataRow() = dtTemp.Select()

            For index As Integer = 0 To rows.Count - 1
                Dim row As DataRow = rows(index)
                If (row.Item(0) Is DBNull.Value) Then
                    Exit For
                End If

                dt.ImportRow(row)
            Next

            Return dt

        End Using

    End Function

Question 2

我相信这将是一项循环的通过表，并载入一个数据表，每个片然后添加到一的数据集。我的代码中假定的相同范围内被用于每个片。我做的范围内连续的，因为它将需要一个单独的命令为每个非毗连的范围。我认为它会更容易忽略的多余数据中所得到的数据表。

Private cadenaConexion As String = "Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties='Excel 8.0;HDR=NO';Data Source="
Private rango As String = "A1:C20"

Private Function GetXLSheetNames(path As String) As List(Of String)
    Dim SheetNames As New List(Of String)
    Dim dt As DataTable
    Using cn As New OleDbConnection(cadenaConexion & path)
        cn.Open()
        dt = cn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, Nothing)
    End Using
    For Each row As DataRow In dt.Rows
        Dim s = row("Table_Name").ToString
        SheetNames.Add(s)
    Next
    Return SheetNames
End Function

Public Function Obtenerdatos(ByVal ruta As String, ByVal hoja As String, ByVal rango As String) As DataSet
    Dim ds As New DataSet
    Dim lst = GetXLSheetNames(ruta)
    Using cnn As New OleDbConnection(cadenaConexion & ruta),
            cmd As New OleDbCommand()
        cmd.Connection = cnn
        cnn.Open()
        For Each s In lst
            Dim dt As New DataTable(s)
            cmd.CommandText = $"SELECT * FROM [{s}{rango}]"
            Using reader = cmd.ExecuteReader
                dt.Load(reader)
            End Using
            ds.Tables.Add(dt)
        Next
    End Using
    Return ds
End Function

Mary · Answer 1 · 2021-11-24T07:33:37

我相信这将是一项循环的通过表，并载入一个数据表，每个片然后添加到一的数据集。我的代码中假定的相同范围内被用于每个片。我做的范围内连续的，因为它将需要一个单独的命令为每个非毗连的范围。我认为它会更容易忽略的多余数据中所得到的数据表。

Private cadenaConexion As String = "Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties='Excel 8.0;HDR=NO';Data Source="
Private rango As String = "A1:C20"

Private Function GetXLSheetNames(path As String) As List(Of String)
    Dim SheetNames As New List(Of String)
    Dim dt As DataTable
    Using cn As New OleDbConnection(cadenaConexion & path)
        cn.Open()
        dt = cn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, Nothing)
    End Using
    For Each row As DataRow In dt.Rows
        Dim s = row("Table_Name").ToString
        SheetNames.Add(s)
    Next
    Return SheetNames
End Function

Public Function Obtenerdatos(ByVal ruta As String, ByVal hoja As String, ByVal rango As String) As DataSet
    Dim ds As New DataSet
    Dim lst = GetXLSheetNames(ruta)
    Using cnn As New OleDbConnection(cadenaConexion & ruta),
            cmd As New OleDbCommand()
        cmd.Connection = cnn
        cnn.Open()
        For Each s In lst
            Dim dt As New DataTable(s)
            cmd.CommandText = $"SELECT * FROM [{s}{rango}]"
            Using reader = cmd.ExecuteReader
                dt.Load(reader)
            End Using
            ds.Tables.Add(dt)
        Next
    End Using
    Return ds
End Function

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