WPF gridview 按钮列仅禁用按钮

Question

I need to disable gridview button only when data bind or button click because I need to disable that button for existing records only and when user add new record need to active my grid button.

here is my XAML code,

                            <DataGridTemplateColumn.CellTemplate>
                                <DataTemplate>
                                    <Button Name="grdBtnAdd" Cursor="Hand"   Click="Button_Click_1" Width="20" Height="20" >

                                        <Button.Template>
                                            <ControlTemplate>
                                                <Border Style="{StaticResource borstyle}" BorderBrush="#282828"  BorderThickness=".5" CornerRadius="3" Name="bor"  >

                                                    <Image Width="20" Height="18" Source="/Images\plus1.png"></Image>
                                                </Border>

                                            </ControlTemplate>
                                        </Button.Template>
                                    </Button>
                                </DataTemplate>
                            </DataGridTemplateColumn.CellTemplate>
                        </DataGridTemplateColumn>

please help me. I found how to disable button after click grid button. I need a way to disable grid buttons.

Answer 1

If i understood the issue correctly than the following should work:

Bind the button IsEnabled property to a property in the viewModel.

<Button Name="grdBtnAdd" IsEnabled="{Binding IsNewRecordsAvailable}" Cursor="Hand" Click="Button_Click_1" Width="20" Height="20">
...
</Button>

Set the viewModel as the views' dataContext:

Sub New()
    Me.Datacontext = new viewModel
End Sub

The viewModel will implement INotifyPropertyChanged, and the property will look like this:

 Private m_isNewRecordsAvailable As Boolean
    Public Property IsNewRecordsAvailable() As Boolean
        Get
            Return m_isNewRecordsAvailable
        End Get
        Set(ByVal value As Boolean)
            m_isNewRecordsAvailable = value
            NotifyPropertyChanged("IsNewRecordsAvailable")
        End Set
    End Property

Now when you want to enable or disable the button, just set IsNewRecordsAvailable to true or false.

Here are some more examples:

http://msdn.microsoft.com/en-us/library/ms229614.aspx http://www.codeproject.com/KB/cs/BindBetterINotifyProperty.aspx