用vb.net将Excel文件上传到MS Access中

将Excel文件上传到MS Access中，可以通过以下步骤实现：

首先，需要确保计算机上已安装MS Access数据库软件，并创建一个目标数据库。
在VB.NET中，可以使用ADO.NET库来处理数据库操作。首先，需要在项目中添加对ADO.NET的引用。
使用以下代码片段来实现Excel文件上传到MS Access数据库：

Imports System.Data.OleDb

Public Class Form1
    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Dim excelFilePath As String = "C:\path\to\excel\file.xlsx"
        Dim accessFilePath As String = "C:\path\to\access\database.accdb"

        Dim connectionString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & accessFilePath & ";Persist Security Info=False;"
        Dim excelConnection As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & excelFilePath & ";Extended Properties='Excel 12.0 Xml;HDR=YES;IMEX=1;'")

        Try
            excelConnection.Open()

            Dim excelCommand As New OleDbCommand("SELECT * FROM [Sheet1$]", excelConnection)
            Dim excelReader As OleDbDataReader = excelCommand.ExecuteReader()

            Dim accessConnection As New OleDbConnection(connectionString)
            accessConnection.Open()

            Dim accessCommand As New OleDbCommand("INSERT INTO TableName (Field1, Field2, Field3) VALUES (@Value1, @Value2, @Value3)", accessConnection)
            accessCommand.Parameters.AddWithValue("@Value1", "")
            accessCommand.Parameters.AddWithValue("@Value2", "")
            accessCommand.Parameters.AddWithValue("@Value3", "")

            While excelReader.Read()
                accessCommand.Parameters("@Value1").Value = excelReader(0).ToString()
                accessCommand.Parameters("@Value2").Value = excelReader(1).ToString()
                accessCommand.Parameters("@Value3").Value = excelReader(2).ToString()

                accessCommand.ExecuteNonQuery()
            End While

            MessageBox.Show("Excel data uploaded to MS Access successfully.")

            excelReader.Close()
            excelConnection.Close()
            accessConnection.Close()
        Catch ex As Exception
            MessageBox.Show("Error: " & ex.Message)
        End Try
    End Sub
End Class

请注意，上述代码中的"TableName"应替换为目标数据库中的表名，"Field1"、"Field2"、"Field3"应替换为目标表中的字段名。