Import Excelu do SQL databáze pomocí vb.net a asp.net

Posílám odpověď, takže pokud na to někdo jiný narazí, může mu pomoci také.

Díky tomu mi všechno fungovalo. (Křičte na Kevina)

Protected Sub Button1_Click(sender As Object, e As System.EventArgs)
    Dim appPath As String = Request.PhysicalApplicationPath
        Dim con As New System.Data.SqlClient.SqlConnection
        con.ConnectionString = "Data Source=.\SQLEXPRESS;AttachDbFilename=" & appPath & "App_Data\Devicedatabase.MDF;Integrated Security=True;User Instance=True;"
        con.Open()
        MsgBox("open")
        con.Close()
        MsgBox("close")
    End Sub

Toto otevřelo spojení po mnoha pokusech a frustracích.

Tím byly excelové hodnoty importovány do databáze:

 Using con As New SqlClient.SqlConnection With
{
    .ConnectionString =
    "Data Source=.\SQLEXPRESS;AttachDbFilename=" & appPath & "App_Data\Devicedatabase.MDF;Integrated Security=True;User Instance=True;"
}
Using cmd As New SqlClient.SqlCommand With
    {
        .Connection = con,
        .CommandText = "INSERT INTO " & """" & DropDownList1.SelectedItem.ToString & """" & "ColumnName1, ColumnName2)VALUES (@Col1,@Col2)"
    }
    cmd.Parameters.Add(New SqlClient.SqlParameter With {.DbType = DbType.String, .ParameterName = "@Col1"})
    cmd.Parameters.Add(New SqlClient.SqlParameter With {.DbType = DbType.String, .ParameterName = "@Col2"})
    cmd.Parameters(0).Value = "Value obtained from Excel"
    cmd.Parameters(1).Value = "Value obtained from Excel"
    con.Open()
    Dim Result As Integer = cmd.ExecuteNonQuery
    If Result <> 1 Then
        MessageBox.Show("Insert failed.")
    Else
        MessageBox.Show("Row inserted.")
    End If

End Using
End Using

Užijte si to!