本文主要是介绍基于WPF技术的换热站智能监控系统16--动态数据绑定，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
1、实现思路
1）实时读取到的数据绑定到前台UI控件上，这个通过MVVM模式实现，同时注意实时读取必须通过任务task异步方式，这就需要读取PLC数据。
2）UI控件的动作，如开或关水泵，必定能够将值写入PLC，这就需要写入PLC数据，此时当上面1的任务执行时，又获取到了新的实时数据，从而改变UI控件
注意：
默认启动程序后，就主动读取PLC数据，启动成功后，可以关闭某个水泵
2、开搞
1、完善数据块中的变量
每个水泵有3个数据，即状态，温度，压力，所以有9个变量
2、完善监控变量
3、完善逻辑代码
private void ReadmyPLC(){tasks.Add(Task.Run(async () =>{ plc.Open();while (!cts.IsCancellationRequested){await Task.Delay(5000);//读取float，从左到右参数依次是：数据块类型，数据块号，启始地址，变量类型，读取数量var result = plc.Read(S7.Net.DataType.DataBlock, 1, 2, S7.Net.VarType.Real, 6);float[] values = (float[])result; //水泵1数据MainData.MomentDataList1[0].Value = values[0]; MainData.MomentDataList1[1].Value = values[1];//水泵2数据MainData.MomentDataList2[0].Value = values[2];MainData.MomentDataList2[1].Value = values[3];//水泵3数据MainData.MomentDataList3[0].Value = values[4];MainData.MomentDataList3[1].Value = values[5];//读取bool，DB1.DBX0.0是变量的具体地址var result2 = plc.Read(pumpaddr1); //水泵1状态 Pump1State = bool.Parse(result2.ToString());if (!Pump1State){WaterDirection1 = "NONE";//停止流动}else{WaterDirection1 = "EW";//开始流动}result2 = plc.Read(pumpaddr2);//水泵2状态 Pump2State = bool.Parse(result2.ToString());if (!Pump3State){WaterDirection2 = "NONE";}else{WaterDirection2 = "EW";}result2 = plc.Read(pumpaddr3); //水泵3状态 Pump3State = bool.Parse(result2.ToString());if (!Pump3State){WaterDirection3 = "NONE";WaterDirection32 = "NONE";}else{WaterDirection3 = "EW";WaterDirection32 = "WE";}}}, cts.Token));} 4、完善控件数据绑定
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HorizontalAlignment="Center"><Grid.RowDefinitions><RowDefinition/><RowDefinition/></Grid.RowDefinitions><TextBlock Text="No.1 补水泵" Margin="20,3" HorizontalAlignment="Center"/><Grid Grid.Row="1" Margin="10,0"><Grid.ColumnDefinitions><ColumnDefinition/><ColumnDefinition Width="15"/><ColumnDefinition/></Grid.ColumnDefinitions><RadioButton Grid.Column="0" IsChecked="True" Command="{Binding StartCommand}" CommandParameter="1" Grid.ColumnSpan="2" Style="{StaticResource LeftSwitchButtonStyle}" Name="rb"/><RadioButton Grid.Column="1" Grid.ColumnSpan="2" Command="{Binding StopCommand}" CommandParameter="1" Style="{StaticResource RightSwitchButtonStyle}"/></Grid></Grid><!--补水泵2--><Grid Background="#88F0F4F8" VerticalAlignment="Center" HorizontalAlignment="Center"><Grid.RowDefinitions><RowDefinition/><RowDefinition/></Grid.RowDefinitions><TextBlock Text="No.2 补水泵" Margin="20,3" HorizontalAlignment="Center"/><Grid Grid.Row="1" 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LeftSwitchButtonStyle}"/><RadioButton Grid.Column="1" Grid.ColumnSpan="2" Command="{Binding StopCommand}" CommandParameter="3" Style="{StaticResource RightSwitchButtonStyle}"/></Grid></Grid><!--故障切换--> <Grid Background="#88F0F4F8" VerticalAlignment="Center" HorizontalAlignment="Center"><Grid.RowDefinitions><RowDefinition/><RowDefinition/></Grid.RowDefinitions><CheckBox Content="循环变频故障" Grid.Row="0" Style="{StaticResource WarningButtonStyle}" IsChecked="True"/><CheckBox Content="补水变频故障" Grid.Row="1" Style="{StaticResource WarningButtonStyle}"/></Grid></UniformGrid></Border><!--右中区域，系统运行--><Border Background="White" Margin="0,10,20,10" CornerRadius="3" ><Border.Effect><DropShadowEffect BlurRadius="10" ShadowDepth="0" Color="LightGray" Opacity="0.3"/></Border.Effect><Canvas><!--管道--> <c:PipeLine Height="7" Width="839" Direction="EW" HorizontalAlignment="Left" VerticalAlignment="Center" Canvas.Left="10" Canvas.Top="44"/><c:PipeLine x:Name="middle" Panel.ZIndex="3" Canvas.Left="234" Canvas.Top="49" Direction="EW" Height="7" Width="182" CapRadius="3"><c:PipeLine.RenderTransform><TransformGroup><RotateTransform Angle="90" ></RotateTransform></TransformGroup></c:PipeLine.RenderTransform></c:PipeLine><c:PipeLine Height="7" Width="619" Direction="EW" HorizontalAlignment="Left" VerticalAlignment="Center" Canvas.Left="230" Canvas.Top="224"/><c:PipeLine x:Name="middle2" Panel.ZIndex="3" Canvas.Left="164" Canvas.Top="139.5" Direction="{Binding WaterDirection2}" Height="7" Width="185" CapRadius="3"><c:PipeLine.RenderTransform><TransformGroup><RotateTransform Angle="90" ></RotateTransform></TransformGroup></c:PipeLine.RenderTransform></c:PipeLine><c:PipeLine Height="7" Width="399" Direction="{Binding WaterDirection2}" HorizontalAlignment="Left" VerticalAlignment="Center" Canvas.Left="450" Canvas.Top="296" /><c:PipeLine x:Name="right" Panel.ZIndex="3" Margin="0" Canvas.Left="223" Canvas.Top="302" Width="131" Direction="{Binding WaterDirection32}" Height="7" CapRadius="1"><c:PipeLine.RenderTransform><TransformGroup><TranslateTransform X="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Canvas}, Path=ActualHeight}" Y="0"></TranslateTransform><RotateTransform Angle="90" CenterX="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Canvas}, Path=ActualHeight}" CenterY="0"></RotateTransform></TransformGroup></c:PipeLine.RenderTransform></c:PipeLine><c:PipeLine Height="7" Width="79" Direction="{Binding WaterDirection3}" HorizontalAlignment="Left" VerticalAlignment="Center" Canvas.Left="640" Canvas.Top="426" /><c:PipeLine Height="7" Width="79" Direction="{Binding WaterDirection3}" HorizontalAlignment="Left" VerticalAlignment="Center" Canvas.Left="540" Canvas.Top="447" /><c:PipeLine Height="7.5" Width="409" Direction="{Binding WaterDirection1}" HorizontalAlignment="Left" VerticalAlignment="Center" Canvas.Left="10" Canvas.Top="137"/><c:PipeLine Height="7.5" Width="259" Direction="{Binding WaterDirection2}" HorizontalAlignment="Left" VerticalAlignment="Center" Canvas.Left="158" Canvas.Top="317"/><c:PipeLine Height="7.5" Width="459" Direction="{Binding WaterDirection3}" HorizontalAlignment="Left" VerticalAlignment="Center" Canvas.Left="10" Canvas.Top="447"/><c:PipeLine Height="7.5" Width="399" Direction="{Binding WaterDirection1}" HorizontalAlignment="Left" VerticalAlignment="Center" Canvas.Left="450" Canvas.Top="116"/><!--图片--><Image Source="../Assets/Images/d1.jpg" Canvas.Left="35" Canvas.Top="29" Height="39" Width="61" HorizontalAlignment="Center" VerticalAlignment="Top"/><Image Source="../Assets/Images/d1.jpg" Canvas.Left="755" Canvas.Top="29" Height="39" Width="61" HorizontalAlignment="Center" VerticalAlignment="Top"/><Image Source="../Assets/Images/d1.jpg" Canvas.Left="755" Canvas.Top="279" Height="39" Width="61" HorizontalAlignment="Center" VerticalAlignment="Top"/><Image Source="../Assets/Images/d1.jpg" Panel.ZIndex="3" Canvas.Left="95" Canvas.Top="429" Height="39" Width="61" HorizontalAlignment="Center" VerticalAlignment="Top"/><Image Source="../Assets/Images/heat_exchange.jpg" Panel.ZIndex="2" Canvas.Left="264" Canvas.Top="20" Height="156" Width="80" HorizontalAlignment="Center" VerticalAlignment="Top"/><Image Source="../Assets/Images/heat_exchange.jpg" Panel.ZIndex="2" Canvas.Left="264" Canvas.Top="200" Height="156" Width="80" HorizontalAlignment="Center" VerticalAlignment="Top"/><Image Source="../Assets/Images/i2.jpg" Canvas.Left="164" Canvas.Top="13" Height="31" Width="25" HorizontalAlignment="Left" VerticalAlignment="Top"/><Image Source="../Assets/Images/i2.jpg" Canvas.Left="424" Canvas.Top="13" Height="31" Width="25" HorizontalAlignment="Left" VerticalAlignment="Top"/><Image Source="../Assets/Images/i2.jpg" Canvas.Left="524" Canvas.Top="85" Height="31" Width="25" HorizontalAlignment="Left" VerticalAlignment="Top"/><Image Source="../Assets/Images/i2.jpg" Canvas.Left="684" Canvas.Top="193" Height="31" Width="25" HorizontalAlignment="Left" VerticalAlignment="Top"/><Image Source="../Assets/Images/i2.jpg" Canvas.Left="584" Canvas.Top="265" Height="31" Width="25" HorizontalAlignment="Left" VerticalAlignment="Top"/><Image Source="../Assets/Images/f2.jpg" Panel.ZIndex="2" Canvas.Left="64" Canvas.Top="115" Height="33" Width="34" HorizontalAlignment="Left" VerticalAlignment="Top"/><Image Source="../Assets/Images/f2.jpg" Panel.ZIndex="2" Canvas.Left="224" Canvas.Top="425" Height="33" Width="34" HorizontalAlignment="Left" VerticalAlignment="Top"/><!--3个水泵--><c:Pump Width="42" Height="38" IsRunning="{Binding Pump1State}" Canvas.Left="411" Canvas.Top="111" HorizontalAlignment="Center" VerticalAlignment="Top"/><c:Pump Width="42" Height="38" IsRunning="{Binding Pump2State}" Canvas.Left="411" Canvas.Top="291" HorizontalAlignment="Center" VerticalAlignment="Top"/><c:Pump Width="42" Height="38" IsRunning="{Binding Pump3State}" Canvas.Left="611" Canvas.Top="421" HorizontalAlignment="Center" VerticalAlignment="Top"/><!--数据看板--><c:DataBoard Width="75" Height="40" Canvas.Left="30" Canvas.Top="71" ItemsSource="{Binding MainData.MomentDataList1}"/><c:DataBoard Width="75" Height="40" Canvas.Left="135" Canvas.Top="56" ItemsSource="{Binding MainData.MomentDataList1}"/><c:DataBoard Width="75" Height="40" Canvas.Left="545" Canvas.Top="71" ItemsSource="{Binding MainData.MomentDataList1}"/><c:DataBoard Width="75" Height="40" Canvas.Left="495" Canvas.Top="252" ItemsSource="{Binding MainData.MomentDataList2}"/> <c:DataBoard Width="75" Height="40" Canvas.Left="595" Canvas.Top="178" ItemsSource="{Binding MainData.MomentDataList2}"/> <c:DataBoard Width="75" Height="40" Canvas.Left="90" Canvas.Top="383" ItemsSource="{Binding MainData.MomentDataList3}"/><c:CoolingTower RunningState="Normal" Width="140" Height="150" Canvas.Left="415" Canvas.Top="347"></c:CoolingTower></Canvas></Border></DockPanel></Window>
5、运行效果
程序启动后，暂时没有数据
5秒后，数据实时显示，温度压力状态数据与监控表中的数据一致的 
关闭水泵1，观察管道和风扇情况及监控表数值
开启水泵1，管道流动了，风扇转动了 ，PLC数据改变了
至此，PLC与系统完美对接，实现了全场监控管理。
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