how to check string value and refresh the page in asp.net

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i have a static string in static class, its getting value from desktop application,

on asp.net i have to check that its null or have value, if it has value , i want to

show it on label (on aspx page) , i have put a backgroud worker in global.asax,

C#

public static BackgroundWorker worker = new BackgroundWorker();
    public static int ID = 0;
  //  public static List<Person> personList = new List<Person>();
    public static string personList;
    public static bool stopWorker = false;
    void Application_Start(object sender, EventArgs e)
    {
        worker.DoWork += new DoWorkEventHandler(DoWork);
        worker.WorkerReportsProgress = true;
        worker.WorkerSupportsCancellation = true;
        worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(WorkerCompleted);
        // Calling the DoWork Method Asynchronously
        worker.RunWorkerAsync();

C#

private static void DoWork(object sender, DoWorkEventArgs e)
{
    //foreach (Person p in personList)
    //{
    personList = Class1.GetDataFromDesktop;
    //}
}

its checking value time to time, but i am unable to show the response on label which is on aspx page
, what to do, is there any other process or i can do it using global.asax

Posted 13-Jul-15 6:28am

Karachi Coder

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Comments

ZurdoDev 13-Jul-15 12:42pm

Where are you lost? You say you need your webapp to get a value from the desktop app? From your code sample, it looks like you are calling Class1.GetDataFromDesktop which implies you have code to get the data. Putting that in a label is the easy part. Label1.Text = Class1.GetDataFromDesktop so where exactly are you stuck?

Karachi Coder 13-Jul-15 14:27pm

the value of GetDataFromDesktop is continuously changing , a i want aspx page to be refreshed when ever the value of 'getDataFromDesktop' changed.
it sets as 'varified' and 'notVarified'

ZurdoDev 13-Jul-15 14:29pm

I think you misunderstand how the web works. Code does not run in the web until someone visits the page. The server then executes the page and sends html to the client and then disconnects.

You'll want to use the setTimeout function in JS and call a webservice to get the value.

Karachi Coder 13-Jul-15 14:46pm

i am getting value from web service, web service setting the value of GetDataFromDesktop, i just want a page_load fire, when value of this variable changed, so i set the label , and show the response to aspx. any other way?

ZurdoDev 13-Jul-15 14:47pm

A web page is dead. It is not connected. So, you have to do something for the code to run on the server and come back to your webpage.

So, use JavaScript's setTimeout method. It fires every x milliseconds on the client side. It's very easy to use.

Karachi Coder 15-Jul-15 3:55am

i have started to do it through java script , i am checking the data within the static string member, which is changing, but not getting shown on asp.net page, b/c that string member is on server side, page have to have refresh to get new value of string..how can i get value of static string member through java script function,any suggestion,? or i use global.asax to get dynamic value?

var myVar;
myVar= <% ="\""+Class1.GetDataFromDesktop + "\"" %> ;
document.getElementById("TextBox2").value=myVar;
setInterval(function () { myFunction(); }, 10000);

[no name] 13-Jul-15 12:47pm

Where do you check value contineously from your desktop application? Application_Start will not be good idea.

The Application_Start and Application_End methods are special methods that do not represent HttpApplication events. ASP.NET calls them once for the lifetime of the application domain, not for each HttpApplication instance.

So When first user will open the site it will hit the application_start method after that it will not.

Karachi Coder 13-Jul-15 14:27pm

so, on aspx page, how to refresh the page when ever value of 'GetDataFromDesktop'
changed?

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