Question

我已经分配了2个ultracombobox，它是一个数据集合到一个集合。但是当我改变组合框的值时，集合没有得到反映。

但是当我改变第二个组合框的值时，第一个组合框所做的更改会被反射，第二个组合框则不会被反射。

//代码

'DataBinding Declaration

    Public Shared ObjLookupHeaderBindings As BindingSource = New BindingSource() 

'Binding Asignment

    ObjLookupHeaderBindings.DataSource = LookupHeadersCollection
    ultraGridBase.DataSource = ObjLookupHeaderBindings

'Collection Class Example code
Public Class LookupHeadersCollection

Public Event LookupSQLCommandChanged As EventHandler

 ''' <summary>
    ''' Get or set the SQL Query values
    ''' </summary>
    ''' <value></value>
    ''' <remarks></remarks>
    Public Property LookupSQLCommand() As String
        Get
            Return Me.m_sLookupSQLCommand
        End Get

        Set(ByVal value As String)
            Me.m_sLookupSQLCommand = value
            Me.m_bIsChanged = True
            RaiseEvent LookupSQLCommandChanged(Me, EventArgs.Empty)
        End Set

    End Property
End Class

'Add Binding into to controls
cmbSQLServer.DataBindings.Add(New Binding("Text", ObjLookupHeaderBindings, "LookupConnection", False))
cmbDatabaseName.DataBindings.Add(New Binding("Text", ObjLookupHeaderBindings, "LookupDatabaseName", False))
txtSQLCommand.DataBindings.Add(New Binding("Value", ObjLookupHeaderBindings, "LookupSQLCommand", False))


'I tried to the following ways, but its not working.
txtSQLCommand.DataBindings(O).ReadValue()
ObjLookupHeaderBindings.CurrencyManager.Refresh()

我哪里出错了？

Answer 1

添加了UpdateMode的{{1}}，然后就可以了。

//代码

DataSource

DataBindings没有反映在集合中

1 个答案: