如何使下拉列表默认为表中的第一行名称

编辑:更多代码

Dim oControl As New Forms.Control()

                            Using types As New DataSet
                                With oDal
                                    .Parameters.Clear()
                                    .Execute(sql, types)
                                End With
                                With ddlType
                                    .DataSource = types.Tables(0)
                                    .DataTextField = "Name"
                                    .DataValueField = "TypeId"
                                    .Items.Clear()
                                    .DataBind()
                                    If .Items.Count > 0 Then
                                        .SelectedIndex = 0
                                    End If
                                End With

                            End Using
                            'set queue type with our asp:dropdownlist control
                            oControl = New Forms.Control(Forms.Control.ControlType.ComboBox)
                            'we need to connect the two controls
                            oControl.Id = ddlType.ID

                            'add it to the grid
                            With .Columns.Add("CredentialTypeId", "Type", 85)
                                .Editor = oControl
                            End With

出于某种原因,当您单击下拉列表时,“0”将显示为默认值。它需要是表中的第一个文本/值对。表目前只返回一行,这是正确的,但0仍然是默认值。

有人知道为什么吗?