Re: unable to understand concurrencymode - WPF Discussion Boards

Hi, I created WPF as C# dll.
And i loaded that dll in one of my VC++ dailog.
Now the control apperas in dialog from the half and other place look fully black.Whats my mistake.How can i do that.
Pls help me.

Anu

This is my service code

<br />
using System;<br />
using System.Collections.Generic;<br />
using System.Linq;<br />
using System.Threading;<br />
using System.ServiceModel;<br />
using System.ServiceModel.Description;<br />
using System.Collections;<br />
<br />
namespace ServerConsole<br />
<br />
{<br />
<br />
    [ServiceContract ]<br />
<br />
    public interface IService1<br />
    {<br />
<br />
        [OperationContract]<br />
        String GetMessage(String name);<br />
<br />
        [OperationContract]<br />
        string GetData(int value);<br />
<br />
 <br />
<br />
    }<br />
<br />
    [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Single)]<br />
<br />
     //   [ServiceBehavior( InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple)]<br />
<br />
    //[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession, ConcurrencyMode = ConcurrencyMode.Single)]<br />
<br />
   // [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession, ConcurrencyMode = ConcurrencyMode.Multiple)]<br />
<br />
 // [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall, ConcurrencyMode = ConcurrencyMode.Single)]<br />
<br />
    //[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall, ConcurrencyMode = ConcurrencyMode.Multiple)]<br />
<br />
   <br />
<br />
   <br />
<br />
   <br />
<br />
    public class Service1 : IService1<br />
<br />
    {<br />
<br />
       //Dictionary<int, string> d = new Dictionary<int, string>();<br />
<br />
       Int32 someNumber;<br />
<br />
      <br />
<br />
        Service1()<br />
<br />
        {<br />
<br />
            Console.WriteLine("{0} : Created new instance ", System.DateTime.Now);<br />
<br />
        }<br />
<br />
 <br />
<br />
        public string GetData(int value)<br />
<br />
        {<br />
<br />
           <br />
<br />
            //Console.WriteLine("{0} : Get data called on thread {1}", System.DateTime.Now, Thread.CurrentThread.ManagedThreadId);<br />
<br />
 <br />
            someNumber = value;<br />
<br />
<br />
 <br />
<br />
            Random rand = new Random();<br />
<br />
 <br />
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            Thread.Sleep(rand.Next(1000));<br />
<br />
 <br />
<br />
            // show the current value of the field and parameter<br />
<br />
 <br />
<br />
            // with percall, they will always be the same<br />
<br />
 <br />
<br />
            Console.WriteLine("parameter = {0}, somenumber = {1}, thread = {2}\n",<br />
<br />
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<br />
              value.ToString(),<br />
<br />
 <br />
<br />
              someNumber.ToString(),<br />
<br />
 <br />
<br />
              Thread.CurrentThread.ManagedThreadId);<br />
<br />
 <br />
            return string.Format("You entered: {0}", value);<br />
<br />
           <br />
<br />
        }<br />
<br />
 <br />
        public String GetMessage(String name)<br />
<br />
        {<br />
<br />
            Console.WriteLine("{0} : Get Message called on thread {1}", System.DateTime.Now, Thread.CurrentThread.ManagedThreadId);<br />
<br />
            return "Hello world from " + name + "!";<br />
<br />
        }<br />
<br />
    }<br />
<br />
<br />
    class Program<br />
<br />
    {<br />
<br />
        static void Main(string[] args)<br />
<br />
        {<br />
<br />
            ServiceHost serviceHost = new ServiceHost(typeof(Service1), new Uri("http://localhost:8001/ServerConsole"));<br />
<br />
            serviceHost.AddServiceEndpoint(typeof(IService1), new WSHttpBinding(), "");<br />
<br />
 <br />
<br />
            ServiceMetadataBehavior smb = new ServiceMetadataBehavior();<br />
<br />
            smb.HttpGetEnabled = true;<br />
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            serviceHost.Description.Behaviors.Add(smb);<br />
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 <br />
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            serviceHost.Open();<br />
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 <br />
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            Console.ReadKey();<br />
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 <br />
<br />
            serviceHost.Close();<br />
<br />
        }<br />
<br />
    }<br />
<br />
}<br />
<br />
<br />
but through this code i cannot understand properly  the concurrency mode,<br />
<br />
do any one have code to under stand concurrency mode clearly.<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
 <br />
<br />

Single: Requests are queued, so only one can be processed at a time. No threading issues.

Multiple: Multiple requests can happen at the same time. You have to deal with it just like you would with a normal multi-threaded program.

That's pretty much it.

Proud to have finally moved to the A-Ark. Which one are you in?
Author of Guardians of Xen (Sci-Fi/Fantasy novel)

that i know and read in many books but i want some concrete examples. please help me.

Can any body tell me the what code i write in client to check the concurrency.

You don't "check" the concurrency from the client... The server is in charge of that. The client doesn't need to know.

Proud to have finally moved to the A-Ark. Which one are you in?
Author of Guardians of Xen (Sci-Fi/Fantasy novel)

It's the same thing as multi-threaded programming. Generally, you want to use "Multiple" as long as your class is thread-safe.

If you're not familiar with thread safety, I would suggest teaching yourself about that before trying to learn it alongside network communication.

Proud to have finally moved to the A-Ark. Which one are you in?
Author of Guardians of Xen (Sci-Fi/Fantasy novel)

I knew about thread safety, but i don't have any clear examples to understand concurrency modes , i run this code as client but it always goes sequentially.

<br />
using System;<br />
using System.Collections.Generic;<br />
using System.Linq;<br />
using System.Text;<br />
<br />
<br />
namespace ConsoleApplication1<br />
{<br />
    class Program<br />
    {<br />
        static void Main(string[] args)<br />
        {<br />
            ServiceReference2.Service1Client c1 = new ConsoleApplication1.ServiceReference2.Service1Client();<br />
<br />
            for (int i = 0; i < 5; i++)<br />
            {<br />
                //Console.WriteLine("Call {0} started at {1}", i, DateTime.Now);<br />
<br />
<br />
                Console.WriteLine(String.Format("Call {0} Start: {1}",<br />
i.ToString(), DateTime.Now.ToLongTimeString()));<br />
                Console.WriteLine(String.Format("Call {0} : {1}",<br />
                i.ToString(), c1.GetData(i)));<br />
                Console.WriteLine(String.Format("Call {0} End: {1}",<br />
                i.ToString(), DateTime.Now.ToLongTimeString()));<br />
            }<br />
           <br />
           <br />
          //  Console.WriteLine(c.GetMessage("chanu"));<br />
<br />
          //  ServiceReference2.Service1Client c2 = new ConsoleApplication1.ServiceReference2.Service1Client();<br />
          //  Console.WriteLine(c2.GetData(20).ToString());<br />
          ////  Console.WriteLine(c1.GetMessage("rahul"));<br />
<br />
<br />
          //  ServiceReference2.Service1Client c3 = new ConsoleApplication1.ServiceReference2.Service1Client();<br />
          //  Console.WriteLine(c3.GetData(30).ToString());<br />
          // // Console.WriteLine(c2.GetMessage("vijay"));<br />
<br />
            c1.Close();<br />
            //c2.Close();<br />
            //c3.Close();<br />
            <br />
            Console.ReadKey();<br />
        }<br />
    }<br />
}<br />
<br />

If you want to test concurrency, you need to have more than one thing attempting to hit the same code at the same time. Simply having one instance of a single threaded application running isn't going to do it I'm afraid. While the code at the far end may have multi-instance or single instance capability, you are calling it from a sequential loop.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

My blog | My articles | MoXAML PowerToys | Onyx

so do i have to execute my client.exe 5 times by double clicking on it . Please can u help me in checking the concurrency

Pete O'Hanlon wrote:
you need to have more than one thing attempting to hit the same code at the same time

Above how can i do ??

When a request is send to service , then it means it comes in the form of thread . for ex

suppose,

MyService ser=new Myservice()

for(int i=0;i<5;i++)
{
      ser.callMethod();
}

then do the above code comes as 5 seperate threads to service or if i click on client.exe 5 times then it comes as 5 thread ?

After working in Visual Studio 2008 with SP1 on my application, everything works sweet with visifire charts.

I then create an install for my application and deploy it to a seperate machine. Charts do not work, and we get system.exception with Eventype:clr20r3

Can visifire be run without VS 2008? I don't expect to install VS 2008 SP1 on every install instance of my app with visifire.

I'm using WPF, and am creating the chart dynamically through code. I'm using the latest stable/non-beta version of visifire, v2.1

Hi,

To run a WPF application, the Microsoft .NET Framework 3.0 and above must be installed on the machine.

For more info, please refer to the link below:
http://msdn.microsoft.com/en-us/library/aa969776.aspx[^]

Regards
Team Visifire

Hi,

I have install the Microsoft .NET Framework 3.5 in the client machine but the application have a same error (system.exception).

Please i really need your help to fix this problem.
Regards
CUTUDI Didier

Do you have .NET 3.5 SP1 installed on that machine? Is it a different targettype than yours, e.g. you're running 32 bit and it's 64 bit?

What's the full event message?

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

My blog | My articles | MoXAML PowerToys | Onyx

The error generate by Windows is :
The Eventype is clr20r3 P4:wpfvisfire.charts P5: 2.3.5.0
The error is system.exception. I run the application in 32bits processor. And i have make my software for 32bits processor.

modified on Wednesday, December 16, 2009 10:07 AM

Are any visifire assemblies required by the applications?

If so, are they available on the target machines?

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

When i look with FILEMON, my application need wpfvisifire.charts.dll in a client computer. But tyhis dll is present in a same directory of application.
I have this error event type EventType:clr20r3 generate by Windows XP. I dont think is a mistake made by VISIFIRE but by Silverlight using to create a VISIFIRE dll.

Regards, Cutudi

After working in Visual Studio 2008 with SP1 on my application, everything works sweet with visifire charts.

I then create an install for my application and deploy it to a seperate machine. Charts do not work, and we get system.exception with Eventype:clr20r3

Can visifire be run without VS 2008? I don't expect to install VS 2008 SP1 on every install instance of my app with visifire.

I'm using WPF, and am creating the chart dynamically through code. I'm using the latest stable/non-beta version of visifire, v2.1

cutudi wrote:
I'm using WPF

You've got the wrong forum. This is the silverlight one.

cutudi wrote:
seperate machine

I suppose for visifire for WPF to run, you would need the full set of the CLR running on this machine.
Might be something you could look into.

There's nothing left in my right brain and nothing right in my left brain.

Hi,everyone!

I got a problem with xbap application.

I have set the security in full trust.But while I published the application,it can only read from local file.
What can I do to write to local file?

I wonder if I can only write to IsolatedStorage. Is there any way to write to local files?

Thank You!

Silverlight makes use of Isolated Storage only. Even OOB applications use Isolated Storage for security reasons.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

My blog | My articles | MoXAML PowerToys | Onyx

hi guys ,

i want to print mydata grid , is there any way? so that i could change view of the data inthe grid and print it as it is in the format .

regards.

Tauseef A Khan
MCP Dotnet framework 2.0.

See here[^]

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

I am try to upload files from my computer to a server machine using WCF in Silverlight. Often i can achieve this but sometimes there occurs a problem and stops uploading. Silverlight error is: "The remote server returned an error: NotFound." and at the status bar of the web page there is a black exclamation mark in yellow triangle says error at page. This is details of it: unhandled error in silverlight 2 application at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallBack beginMethod, Object state) at Syste.Net.Browser.BrowserHttpWebRequest.EndGetResponse (IAsyncResult asynResult) at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelAsyncRequest.CompleteGetResponse (IAsyncResult result) at ....

And after i found where error occurs

(wsUploader is my WCF and svluploader is silverlight project.)
public svlUploader.wsUploader.UploadResponse EndUpload(System.IAsyncResult result) {
object[] _args = new object[0];
svlUploader.wsUploader.UploadResponse _result = ((svlUploader.wsUploader.UploadResponse)(base.EndInvoke("Upload", _args, result)));//<b>error occurs in this line</b>
return _result;
}

So help me....

modified on Monday, December 14, 2009 3:37 PM