[vb net] Combo in datagridview

[ciro78]

lo mostreri ma non c'è nulla

ho messo un datagrid sul form
lo associo al dataset


questo è nel load del form

Me.QUtente21TableAdapter.Fill(Me.DbDataSet.qUtente 21

e questo è il codice del file designer associato al form

<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class frmEditUser
    Inherits System.Windows.Forms.Form

    'Form esegue l'override del metodo Dispose per pulire l'elenco dei componenti.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        Try
            If disposing AndAlso components IsNot Nothing Then
                components.Dispose()
            End If
        Finally
            MyBase.Dispose(disposing)
        End Try
    End Sub

    'Richiesto da Progettazione Windows Form
    Private components As System.ComponentModel.IContainer

    'NOTA: la procedura che segue è richiesta da Progettazione Windows Form
    'Può essere modificata in Progettazione Windows Form.  
    'Non modificarla nell'editor del codice.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.components = New System.ComponentModel.Container
        Me.DataGridView1 = New System.Windows.Forms.DataGridView
        Me.UtenteIDDataGridViewTextBoxColumn = New System.Windows.Forms.DataGridViewTextBoxColumn
        Me.CognomeDataGridViewTextBoxColumn = New System.Windows.Forms.DataGridViewTextBoxColumn
        Me.NomeDataGridViewTextBoxColumn = New System.Windows.Forms.DataGridViewTextBoxColumn
        Me.GruppoDataGridViewTextBoxColumn = New System.Windows.Forms.DataGridViewComboBoxColumn
        Me.DbDataSet = New Attività_di_Gruppo.dbDataSet
        Me.AttDataGridViewTextBoxColumn = New System.Windows.Forms.DataGridViewComboBoxColumn
        Me.QUtente21BindingSource = New System.Windows.Forms.BindingSource(Me.components)
        Me.QUtente21TableAdapter = New Attività_di_Gruppo.dbDataSetTableAdapters.qUtente21TableAdapter
        CType(Me.DataGridView1, System.ComponentModel.ISupportInitialize).BeginInit()
        CType(Me.DbDataSet, System.ComponentModel.ISupportInitialize).BeginInit()
        CType(Me.QUtente21BindingSource, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'DataGridView1
        '
        Me.DataGridView1.AllowUserToOrderColumns = True
        Me.DataGridView1.AutoGenerateColumns = False
        Me.DataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize
        Me.DataGridView1.Columns.AddRange(New System.Windows.Forms.DataGridViewColumn() {Me.UtenteIDDataGridViewTextBoxColumn, Me.CognomeDataGridViewTextBoxColumn, Me.NomeDataGridViewTextBoxColumn, Me.GruppoDataGridViewTextBoxColumn, Me.AttDataGridViewTextBoxColumn})
        Me.DataGridView1.DataSource = Me.QUtente21BindingSource
        Me.DataGridView1.Location = New System.Drawing.Point(13, 13)
        Me.DataGridView1.Name = "DataGridView1"
        Me.DataGridView1.Size = New System.Drawing.Size(900, 150)
        Me.DataGridView1.TabIndex = 0
        '
        'UtenteIDDataGridViewTextBoxColumn
        '
        Me.UtenteIDDataGridViewTextBoxColumn.DataPropertyName = "utente_ID"
        Me.UtenteIDDataGridViewTextBoxColumn.HeaderText = "utente_ID"
        Me.UtenteIDDataGridViewTextBoxColumn.Name = "UtenteIDDataGridViewTextBoxColumn"
        '
        'CognomeDataGridViewTextBoxColumn
        '
        Me.CognomeDataGridViewTextBoxColumn.DataPropertyName = "cognome"
        Me.CognomeDataGridViewTextBoxColumn.HeaderText = "cognome"
        Me.CognomeDataGridViewTextBoxColumn.Name = "CognomeDataGridViewTextBoxColumn"
        '
        'NomeDataGridViewTextBoxColumn
        '
        Me.NomeDataGridViewTextBoxColumn.DataPropertyName = "nome"
        Me.NomeDataGridViewTextBoxColumn.HeaderText = "nome"
        Me.NomeDataGridViewTextBoxColumn.Name = "NomeDataGridViewTextBoxColumn"
        '
        'GruppoDataGridViewTextBoxColumn
        '
        Me.GruppoDataGridViewTextBoxColumn.DataPropertyName = "gruppo_ID"
        Me.GruppoDataGridViewTextBoxColumn.DataSource = Me.DbDataSet
        Me.GruppoDataGridViewTextBoxColumn.DisplayMember = "qUtente21.gruppo"
        Me.GruppoDataGridViewTextBoxColumn.HeaderText = "gruppo"
        Me.GruppoDataGridViewTextBoxColumn.Name = "GruppoDataGridViewTextBoxColumn"
        Me.GruppoDataGridViewTextBoxColumn.Resizable = System.Windows.Forms.DataGridViewTriState.[True]
        Me.GruppoDataGridViewTextBoxColumn.SortMode = System.Windows.Forms.DataGridViewColumnSortMode.Automatic
        Me.GruppoDataGridViewTextBoxColumn.ValueMember = "qUtente21.gruppo_ID"
        '
        'DbDataSet
        '
        Me.DbDataSet.DataSetName = "dbDataSet"
        Me.DbDataSet.SchemaSerializationMode = System.Data.SchemaSerializationMode.IncludeSchema
        '
        'AttDataGridViewTextBoxColumn
        '
        Me.AttDataGridViewTextBoxColumn.DataPropertyName = "att"
        Me.AttDataGridViewTextBoxColumn.HeaderText = "att"
        Me.AttDataGridViewTextBoxColumn.Items.AddRange(New Object() {"Si", "No"})
        Me.AttDataGridViewTextBoxColumn.Name = "AttDataGridViewTextBoxColumn"
        Me.AttDataGridViewTextBoxColumn.Resizable = System.Windows.Forms.DataGridViewTriState.[True]
        Me.AttDataGridViewTextBoxColumn.SortMode = System.Windows.Forms.DataGridViewColumnSortMode.Automatic
        '
        'QUtente21BindingSource
        '
        Me.QUtente21BindingSource.DataMember = "qUtente21"
        Me.QUtente21BindingSource.DataSource = Me.DbDataSet
        '
        'QUtente21TableAdapter
        '
        Me.QUtente21TableAdapter.ClearBeforeFill = True
        '
        'frmEditUser
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(934, 732)
        Me.Controls.Add(Me.DataGridView1)
        Me.Name = "frmEditUser"
        Me.Text = "frmEditUser"
        CType(Me.DataGridView1, System.ComponentModel.ISupportInitialize).EndInit()
        CType(Me.DbDataSet, System.ComponentModel.ISupportInitialize).EndInit()
        CType(Me.QUtente21BindingSource, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)

    End Sub
    Friend WithEvents DataGridView1 As System.Windows.Forms.DataGridView
    Friend WithEvents DbDataSet As Attività_di_Gruppo.dbDataSet
    Friend WithEvents QUtente21BindingSource As System.Windows.Forms.BindingSource
    Friend WithEvents QUtente21TableAdapter As Attività_di_Gruppo.dbDataSetTableAdapters.qUtente21TableAdapter
    Friend WithEvents UtenteIDDataGridViewTextBoxColumn As System.Windows.Forms.DataGridViewTextBoxColumn
    Friend WithEvents CognomeDataGridViewTextBoxColumn As System.Windows.Forms.DataGridViewTextBoxColumn
    Friend WithEvents NomeDataGridViewTextBoxColumn As System.Windows.Forms.DataGridViewTextBoxColumn
    Friend WithEvents GruppoDataGridViewTextBoxColumn As System.Windows.Forms.DataGridViewComboBoxColumn
    Friend WithEvents AttDataGridViewTextBoxColumn As System.Windows.Forms.DataGridViewComboBoxColumn
End Class