why the Integer ID doesn't load correctly in datagridview with dapper in vb.net with access database. whether there is another solution or should code function so that the ID appears in datagridview. The datagridview in my code uses nuget packages "Kimtoo.Bindingprovider" and I also use nuget packages dapper with an Access database.

Public Class TEST
    Public Property Id() As Integer
    Public Property Itemproduct() As String
    Public Property Quantity() As Integer
End Class

Public Class Form1
    Private record As TEST
    Public Function GetConnectionString() As String
        Dim strCon As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|"
        strCon &= "\DB_TEST.accdb;Persist Security Info=False;"
        Return strCon
    End Function
    Public Con As New OleDbConnection(GetConnectionString())
  Private Sub LoadData()
        Try
Dim data As List(Of TEST) = Con.Query(Of TEST)("Select * From TEST").ToList()
            'DataGridView1.Bind(data)
DataGridView1.DataSource = data
      Catch ex As Exception
            MsgBox(ex.Message)
        End Try
    End Sub
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        LoadData()
    End Sub

CodePudding user response：

The column name is ID (upper-case) in the Access database. In class TEST, change Id to ID

Public Class TEST
    Public Property ID As Integer
    Public Property Itemproduct As String
    Public Property Quantity As Integer
End Class

Additional Resources

• Auto-Implemented Properties (Visual Basic)