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WPF TCP/IP Client server communication

Here I'm trying to implement a TCP/IP client server Communication in a WPF application. I see many examples in console applications and forms, but not in WPF applications.
And also I don't know how to stream messages between a client and server. Could anybody help me out with source code?
enter image description here
Client code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.IO;
using System.Threading;
using System.Net.NetworkInformation;
using WPFclient;
namespace WPFClient
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
protected ClientProp WpfClient_;
public MainWindow()
{
InitializeComponent();
}
private void Btncnnct1_Click(object sender, RoutedEventArgs e)
{
TxtBoxIp1.Text = "192.168.0.150";
//TcpClient client = new TcpClient();
this.WpfClient_ = new ClientProp(ipAddress: (this.TxtBoxIp1.Text), portNumber: 138);
this.WpfClient_.BeginPrepareTCPClient();
WpfClient_.Connect(IPAddress.Parse(this.TxtBoxIp1.Text), port: 137);
TxtBoxInfo1.Text = "connected" + Environment.NewLine;
}
private void BtnSnd_Click(object sender, RoutedEventArgs e)
{
Byte[] data = System.Text.Encoding.ASCII.GetBytes(TxtBoxMsg1.Text);
NetworkStream networkStream = WpfClient_.GetStream();
StreamWriter stream = new StreamWriter(TxtBoxMsg1.Text);
stream.Write(TxtBoxMsg1.Text, 0, TxtBoxMsg1.Text.Length);
TxtBoxInfo1.Text += $"Server : {TxtBoxMsg1.Text}{Environment.NewLine}";
}
Help me out to communicate between a server and client in a WPF application. I checked out many methods like stream, network stream, dispatcher, etc.... I couldn't understand the code. I have created two WPF Applications one for server and one for client.
[enter image description here][2] [2]: https://i.stack.imgur.com/pYKaq.png
Server Code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.IO;
namespace ServerWPF
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
private string line;
public MainWindow()
{
InitializeComponent();
}
private void BtnStrt_Click(object sender, RoutedEventArgs e)
{
TxtBoxIp.Text = "192.168.0.150";
TcpListener server = new TcpListener(IPAddress.Parse(TxtBoxIp.Text), port: 137);
server.Start();
TcpClient client = server.AcceptTcpClient();
TxtBoxInfo.Text = "Server Connected" + Environment.NewLine;
BtnStrt.IsEnabled = false;
BtnSend.IsEnabled = true;
NetworkStream stream = client.GetStream();
StreamReader reader = new StreamReader(client.GetStream(), Encoding.UTF8);
}
private void BtnSend_Click(object sender, RoutedEventArgs e)
{
}

how to get cpu state in C#

I am new to C# and programming in general.
I have created a simple plc programme (step7), simulated on PLSIM simulator.
and i want to control this programme with a WPF Interface in C# using Siemens S7ProSim COM Object reference.
here is the problem:
when i want to assign the CPU State to my label, this message is shown:
Error 1 'System.Windows.Controls.Label' does not contain a definition for 'Text' and no extension method 'Text' accepting a first argument of type 'System.Windows.Controls.Label' could be found (are you missing a using directive or an assembly reference?) C:\Users\Lenovo\Documents\Visual Studio 2010\Projects\CSProject\CSProject\MainWindow.xaml.cs 32 28 CSProject
here is my proramm and my wpf interface:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace CSProject
{
public partial class MainWindow : Window
{
public S7PROSIMLib.S7ProSim ps = new S7PROSIMLib.S7ProSim();
public MainWindow()
{
InitializeComponent();
}
private void button1_Click(object sender, RoutedEventArgs e)
{
ps.Connect();
label_CPUState.Text = ps.GetState();
labelScanMode.Text = ps.GetScanMode().ToString();
}
}
}
Thanks a lot.

I believe you want the Content property of the Label, not the Text property. Text is Winforms.
So, simply:
labelScanMode.Content = ps.GetScanMode().ToString();

How to get grid items --wpf

I made WPF application named as WpfApplication7.It has several folders. One of them is named as Assign_Rights . I have created a UserControl in this folder and named it as Assignment_Rights. Inside this user control i have created a grid and bind it to data explicitly! Now There is button name as Click New. It shows me that PK(Primary Key-Value) of a selected item from grid.
User n = grid.GetRow(view.FocusedRowHandle) as User;
int abc = n.Primary_Key;
Question: As i wrote code to get PK of Selected item it generated error at
int abc = n.Primary_Key;
by saying
Error 'WpfApplication7.Assign_Rights.User' does not contain a definition for 'Primary_Key' and no extension method 'Primary_Key' accepting a first argument of type 'WpfApplication7.Assign_Rights.User' could be found (are you missing a using directive or an assembly reference?) D:\Backup_WPFAppliacation7\New folder\WpfApplication7\WpfApplication7\Assign_Rights\Assignment_Rights.xaml.cs 59 28 WpfApplication7
How to Solve this Error?
EDIT
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using DevExpress.Xpf.Core;
using DevExpress.Xpf.Grid;
namespace WpfApplication7.Assign_Rights
{
public partial class Assignment_Rights : UserControl
{
int useridd;
nrcsaEntities d = new nrcsaEntities();
public Assignment_Rights()
{
InitializeComponent();
}
private void ToggleButton1_Click_1(object sender, RoutedEventArgs e)
{
if (view.IsRowSelected(view.FocusedRowHandle) == false)
{
DXMessageBox.Show("Please Select any Item From Grid List");
}
else
{
User n = grid.GetRow(view.FocusedRowHandle) as User;
int abc = n.Primary_Key;
var getd = from p in d.Users select p;
MessageBox.Show(view.FocusedRowHandle.ToString());
} . . . .

Append to existing Xml in C#

I have a Xml File below that I am trying to load in to visual studio then append another entry for D100 to the file then write or append it 1000 times.
The code below saves the document but nothing gets appended.
<flp:Tab xmlns:flp="http://www.w3.org/2001/XMLSchema" Title="Testing">
<flp:Form Number="0" id="1005" />
<flp:Rev Time="2013-01-21T15:08:00">
<flp:Author Name="Brad" Aid="15" />
</flp:Rev>
<flp:Designs Id="D100">
<flp:D100 Number="1">
<flp:Code>A</flp:Code>
<flp:Documented>true</flp:Documented>
<flp:Note>In Process</flp:Note>
<flp:Testers>
<flp:Tester Name="David">
<flp:Titles>
<flp:Title Number="0" Name="Entry 1">
<flp:Start>Begin</flp:Start>
<flp:Finish>End</flp:Finish>
</flp:Title>
</flp:Titles>
</flp:Tester>
</flp:Testers>
<flp:TestGivers>
<flp:TestGiver Name="James" />
</flp:TestGivers>
<flp:IsRequired>true</flp:IsRequired>
<flp:IsOptional>false</flp:IsOptional>
</flp:D100>
</flp:Designs>
</flp:Tab>
I am trying to append and write out the information 1000 times in the Xml File
Here is my C# code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Xml;
namespace AppendXml
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void Button_Click_1(object sender, RoutedEventArgs e)
{
XmlDocument doc = new XmlDocument();
doc.Load("C:\\Desktop\\Temp.xml");
//XmlElement root = doc.CreateElement("Tab");
XmlElement D100 = doc.CreateElement("D100");
D100.SetAttribute("Number", "2");
XmlElement Code = doc.CreateElement("Code");
Code.InnerText = "B";
XmlElement Documented = doc.CreateElement("Documented");
Documented.InnerText = "false";
XmlElement Note = doc.CreateElement("Note");
Note.InnerText = "Complete";
XmlElement Tester = doc.CreateElement("Tester");
Tester.SetAttribute("Name", "John");
XmlElement Title = doc.CreateElement("Title");
Title.SetAttribute("Number", "0");
Title.SetAttribute("Name", "Ronald");
XmlElement Start = doc.CreateElement("Start");
Start.InnerText = "Begin";
XmlElement Finish = doc.CreateElement("Finish");
Finish.InnerText = "End";
XmlElement TestGiver = doc.CreateElement("TestGiver");
TestGiver.SetAttribute("Name", "Jeremy");
XmlElement IsRequired = doc.CreateElement("IsRequired");
IsRequired.InnerText = "true";
XmlElement IsOptional = doc.CreateElement("IsOptional");
IsOptional.InnerText = "false";
D100.AppendChild(IsOptional);
D100.AppendChild(IsRequired);
D100.AppendChild(TestGiver);
D100.AppendChild(Finish);
D100.AppendChild(Start);
D100.AppendChild(Title);
D100.AppendChild(Tester);
D100.AppendChild(Note);
D100.AppendChild(Documented);
D100.AppendChild(Code);
//root.AppendChild(D100);
//doc.AppendChild(root);
doc.Save("test13.xml");
}
}
}
The document saves but noting appends. What am I leaving out?

You should append D100 to flp:Designs - now you are not appending it to anything, hence nothing gets added to the document:
XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
nsmgr.AddNamespace("flp", "http://www.w3.org/2001/XMLSchema");
XmlNode designs = doc.SelectSingleNode("//flp:Designs", nsmgr);
designs.AppendChild(D100);
You are also creating D100 in the default namespace, probably you want to create it in the http://www.w3.org/2001/XMLSchema namespace with flp prefix as the rest of the XML:
XmlElement D100 = doc.CreateElement("flp", "D100", "http://www.w3.org/2001/XMLSchema");
Lastly: http://www.w3.org/2001/XMLSchema is a standard namespace, that here is used for some custom XML, this is in general wrong.

Extract Specific Text from Html Page

Html page is look like this
<tr>
<th rowspan="4" scope="row">General</th>
<td class="ttl">2G Network</td>
<td class="nfo">GSM 850 / 900 / 1800 / 1900 </td>
</tr><tr>
<td class="ttl">3G Network</td>
<td class="nfo">HSDPA 900 / 1900 / 2100 </td>
</tr>
for that i am try to use
var text = document.getElementsByClassName("nfo")[0].innerHTML;
Provided By Alex
But i am getting this error
Error 2 The name 'document' does not exist in the current context C:\Users\Nabi Javid\Documents\Visual Studio 2008\Projects\WpfApplication2\WpfApplication2\Window1.xaml.cs 30 22 WpfApplication2
Am i missing some Libary or something
Currently my code is like that
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace WpfApplication1
{
/// <summary>
/// Interaction logic for Window1.xaml
/// </summary>
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
}
private void button1_Click(object sender, RoutedEventArgs e)
{
HtmlAgilityPack.HtmlDocument htmlDoc = new HtmlAgilityPack.HtmlDocument();
htmlDoc.Load("nokia_c5_03-3578.html");
var text = document.getElementsByClassName("nfo")[0].innerHTML;
}
}
}

You are mixing C# code with javascript code.
Instead of this:
var text = document.getElementsByClassName("nfo")[0].innerHTML;
type this:
var text = htmlDoc.DocumentNode.SelectNodes("//td[#class='nfo']")[0].InnerHtml;
To keep it simple, I have refrained from checking exceptions.

I'm not very deep into .net but it looks like you are trying to mix JavaScript-code
var text = document.getElementsByClassName("nfo")[0].innerHTML;
with your .net code...?

You must use the htmlDoc variable to call methods in your case.
By the way the HtmlDocument class does not have a method with that name. Try to see if you can find another match for your needs in this list.
As the error says, the document variable does not exits in your code.

do you want
var text = htmlDoc.getElementsByClassName("nfo")[0].innerHTML;
? Not familiar with HTML Agility Pack, but that would seem to make sense

You can get elements by class name using next method which return elements where are several classes defined in one class attribute:
private HtmlNodeCollection GetElementsByClassName(HtmlDocument htmlDocument, string className)
{
string xpath =
String.Format(
"//*[contains(concat(' ', normalize-space(#class), ' '), ' {0} ')]",
className);
return htmlDocument.DocumentNode.SelectNodes(xpath);
}