比例尺随级别长度变化、datagrid的biding属性

                <sdk:DataGrid.Columns>
                    <sdk:DataGridTextColumn  Header="镇" Binding="{Binding Attributes[XZQH]}"></sdk:DataGridTextColumn>
                    <sdk:DataGridTextColumn  Header="名称"  Binding="{Binding Attributes[SPN]}"/>
                    <sdk:DataGridTextColumn  Header="地灾类型"  Binding="{Binding Attributes[JDLX]}"/>
                    <sdk:DataGridTextColumn  Header="潜在经济损失" Binding="{Binding Null}"></sdk:DataGridTextColumn>
                    <sdk:DataGridTextColumn  Header="监测人" Binding="{Binding Null}"></sdk:DataGridTextColumn>
                    <sdk:DataGridTextColumn  Header="监测人联系电话" Binding="{Binding Null}"></sdk:DataGridTextColumn>

                </sdk:DataGrid.Columns>