问题描述
我正在使用 DDE App Nuget Library 连接到 PLC（目前使用模拟器）
我设法与 PLC 建立了连接，并且可以使用 RSLinx > DDE/OPC > DDE 客户端诊断查看 DDE 客户端...
但是，当我尝试戳标签（强制更改值）时，它不起作用。我尝试了各种输入组合。
以下是此应用程序的 C# 和 XAML 代码。
C# 代码
using System;
using System.Text;
using System.Windows;
using NDde.Advanced;
using NDde.Client;
namespace PLC_Simulator
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
#region Fields
private DdeClient client = null;
#endregion
#region Properties
#region AppString
/// <summary>
/// Gets or Sets the AppString property.
/// </summary>
public string AppString
{
get { return (string)GetValue(AppStringProperty); }
set { SetValue(AppStringProperty,value); }
}
/// <summary>
/// Using a DependencyProperty as the backing store for AppString. This enables animation,styling,binding,etc...
/// </summary>
public static readonly DependencyProperty AppStringProperty =
DependencyProperty.Register(nameof(AppString),typeof(string),typeof(MainWindow));
#endregion
#region TopicString
/// <summary>
/// Gets or Sets the TopicString property.
/// </summary>
public string TopicString
{
get { return (string)GetValue(TopicStringProperty); }
set { SetValue(TopicStringProperty,value); }
}
/// <summary>
/// Using a DependencyProperty as the backing store for TopicString. This enables animation,etc...
/// </summary>
public static readonly DependencyProperty TopicStringProperty =
DependencyProperty.Register(nameof(TopicString),typeof(MainWindow));
#endregion
#region PokeString
/// <summary>
/// Gets or Sets the PokeString property.
/// </summary>
public string PokeString
{
get { return (string)GetValue(PokeStringProperty); }
set { SetValue(PokeStringProperty,value); }
}
/// <summary>
/// Using a DependencyProperty as the backing store for PokeString. This enables animation,etc...
/// </summary>
public static readonly DependencyProperty PokeStringProperty =
DependencyProperty.Register(nameof(PokeString),typeof(MainWindow));
#endregion
#region PokeData
/// <summary>
/// Gets or Sets the PokeData property.
/// </summary>
public string PokeData
{
get { return (string)GetValue(PokeDataProperty); }
set { SetValue(PokeDataProperty,value); }
}
/// <summary>
/// Using a DependencyProperty as the backing store for PokeData. This enables animation,etc...
/// </summary>
public static readonly DependencyProperty PokeDataProperty =
DependencyProperty.Register(nameof(PokeData),typeof(MainWindow));
#endregion
#endregion
#region Constructors
public MainWindow()
{
Closing += MainWindow_Closing;
InitializeComponent();
}
#endregion
#region Methods
private bool CheckClient()
{
if (client == null)
{
MessageBox.Show("No Application Loaded","Error");
return false;
}
if (!client.IsConnected)
{
MessageBox.Show("Application is not connected","Error");
return false;
}
return true;
}
private void CloseClient()
{
client.disconnected -= Client_disconnected;
if (client.IsConnected)
client.disconnect();
client.dispose();
client = null;
}
#endregion
#region Delegates,Events,Handlers
private void MainWindow_Closing(object sender,System.ComponentModel.CancelEventArgs e)
{
if (client != null)
CloseClient();
}
private void Select_DDE_Button_Click(object sender,RoutedEventArgs e)
{
try
{
if (client != null)
CloseClient();
DdeContext context = new DdeContext()
{
Encoding = Encoding.ASCII,};
client = new DdeClient(AppString,TopicString,context);
client.Connect();
client.disconnected += Client_disconnected;
MessageBox.Show("Application Loaded Successfully");
}
catch (Exception ex)
{
MessageBox.Show($"Application Failed to load:\n{ex.Message}","Error");
}
}
private void Client_disconnected(object sender,DdedisconnectedEventArgs e)
{
MessageBox.Show("Application disconnected","Warning");
}
private void Poke_Button_Click(object sender,RoutedEventArgs e)
{
if (!CheckClient())
return;
try
{
client.Poke(PokeString,PokeData,60000);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message,"Error");
}
}
private void Request_Button_Click(object sender,RoutedEventArgs e)
{
if (!CheckClient())
return;
client.BeginRequest(PokeString,1,OnRequestComplete,client);
}
private void OnRequestComplete(IAsyncResult ar)
{
try
{
DdeClient client = (DdeClient)ar.AsyncState;
byte[] data = client.EndRequest(ar);
Console.WriteLine("OnRequestComplete: " + Encoding.ASCII.GetString(data));
}
catch (Exception e)
{
Console.WriteLine("OnRequestComplete: " + e.Message);
}
}
#endregion
}
}
WPF XAML 代码
<Window x:Class="PLC_Simulator.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:PLC_Simulator"
mc:Ignorable="d"
DataContext="{Binding RelativeSource={RelativeSource Mode=Self}}"
Height="450"
Width="800">
<Grid>
<Grid.ColumnDeFinitions>
<ColumnDeFinition Width="100"/>
<ColumnDeFinition />
</Grid.ColumnDeFinitions>
<Grid.RowDeFinitions>
<RowDeFinition Height="30" />
<RowDeFinition Height="30" />
<RowDeFinition Height="30" />
<RowDeFinition Height="30" />
<RowDeFinition Height="30" />
<RowDeFinition Height="30" />
<RowDeFinition />
</Grid.RowDeFinitions>
<TextBlock Text="Application: "
Margin="5"
VerticalAlignment="Center" />
<TextBox Grid.Column="1"
Height="25"
HorizontalAlignment="Left"
Text="{Binding Path=AppString}"
Width="150" />
<TextBlock Text="Topic: "
Grid.Row="1"
Margin="5"
VerticalAlignment="Center" />
<TextBox Grid.Column="1"
Grid.Row="1"
Height="25"
HorizontalAlignment="Left"
Text="{Binding Path=TopicString}"
Width="150"/>
<Button Grid.Column="1"
Grid.Row="1"
Height="25"
Width="112"
Content="Load"
Click="Select_DDE_Button_Click" />
<TextBlock Grid.Row="2"
Text="Poke String:"
Margin="5" />
<TextBox Grid.Column="1"
Grid.Row="2"
Height="25"
HorizontalAlignment="Left"
Width="150"
Text="{Binding Path=PokeString}" />
<TextBlock Grid.Row="3"
Text="Poke Data:"
Margin="5" />
<TextBox Grid.Column="1"
Grid.Row="3"
Height="25"
HorizontalAlignment="Left"
Width="150"
Text="{Binding Path=PokeData}" />
<StackPanel Grid.Column="1"
Grid.Row="3"
HorizontalAlignment="Center"
Orientation="Horizontal">
<Button Height="25"
Width="112"
Margin="5,5,0"
Content="Poke"
Click="Poke_Button_Click" />
<Button Height="25"
Width="112"
Margin="5,0"
Content="Request"
Click="Request_Button_Click" />
</StackPanel>
</Grid>
</Window>
解决方法
暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！
如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。
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