Add attribute infomation for a new point

[linxieryu]

I want to add a point,and give the point attribute infomation.
Now I can add the point,and pop up a Board wich can list all its fields.But I cann't save this Textbox's infomation to the point's attribute.
The following code is part of the Board's code. So how can I do? Please help me!

                    <ListBox ItemsSource="{Binding ElementName=MyMap, Path=Layers[ThreatPoints].LayerInfo.Fields}" VerticalAlignment="Top" HorizontalAlignment="Center">
                            <ListBox.ItemTemplate>
                                <DataTemplate>
                                    <Grid>
                                        <Grid.ColumnDefinitions>
                                            <ColumnDefinition/>
                                            <ColumnDefinition/>
                                        </Grid.ColumnDefinitions>
                                        <TextBlock Text="{Binding Name}" Grid.Column="0" FontSize="20" Width="100"/>
                                        <TextBox Text="{Binding Value, Mode=TwoWay}" Grid.Column="1" FontSize="20" Width="150"/>
                                    </Grid>
                                </DataTemplate>
                            </ListBox.ItemTemplate>
                        </ListBox>

[jenniferdnery]

I think you should be using graphic.Attributes as your ListBox.ItemsSource.

Before adding the graphic to your layer, you can give it default attribute values. Kindly see post# 11 in this thread: http://forums.arcgis.com/threads/217...-Silverlight-4. You can then set your ListBox.ItemsSource = graphic.Attributes.