object reference cannot set to the instance of object?

Yes file created and but giving error file is in another process because, see below code .

 

public void AppendTxtdata(string myval)                                                                                                             {                                                                                                                                                                                    try                                                                                                                                                                                {                                                                                                                                                                                if(InvokeRequired)                                                                                                                                                     {                                                                                                                                                                           this.Invoke(new Action(AppendTxtdata), new object[] { myval });                                                              return;                                                                                                                                                                            }                                                                                                                                              Globalvariable.SomeData += myval;                    

 

 error file attached here,

Hi, thanks for the appreciation :)

This concept of globalvariable class is working but data not shows at runtime it shows when i close tcpclient object and tcplistener object. why this happend? here is the code for button , when i clicked this stop button data shows in txtbox.

 

       private void button1_Click(object sender, EventArgs e)

       {

             try

            {

                   AppendTxtdata(Environment.NewLine +"Data sent to Client : " + clientSocket.Client.RemoteEndPoint + Environment.NewLine);

                  this.clientSocket.Close();

                  this.serverSocket.Stop();

            }

            catch { }

       }

Hi,

 

Try this

 

Create new class like global variable

 

Okay,so try like you can delcare one global variable and assingn the data to global variable in form1.  After that finally textbox value assign to global variable data like 

txtbox.text =globalvariable;

 

Now call form 2 assign values to global variable only.  After that finally textbox value assign to global variable data like txtbox.text =globalvariable;

you want call belllow method 

 

 

you need display in form2 ?

For Example 

 

first form like

-------------------

 

 

2nd form

------------------

Hi,

 

You need display the textbox data in 2nd form. So you can are you calling like bellow

 

public void getdata() // to run server //
{
Form1 f = new Form1();
f.AppendTxtdata("data sent");
} 

 

just change like below

 public void getdata() // to run server //
{
Form1 f = new Form1();
f.AppendTxtdata("data sent");

f.ShowDialog();
}

Hi,

 

Please send code/screenshot of the both form .cs i will check you. why are you getting error. I have created two forms. one form conatins method definition like  

 

}
catch { }
}
 

Second form calling the function like

 

I am not getting error above mentioned code.

 

Thanks

I am trying to write code for multiple client server and it is working . But I want to display data conversation on textbox, for that I have following method in form1.cs which if calling from same class this runs but when calling from another class handleClient.cs this doesnt works and giving "object reference not set to an instance : null reference exception" error but when I putted breakpoint there it shows data in loop but break just after the loop and doesn't displays data. If i create instance of form1 like this  "Form1 f = new Form1" it doexnt give null reference error but also data not printed in textbox. 

 one more error I got i.e."unreachable code detected" after while loop in form1.cs

I attched my code here please have llok once. 

Hi, Please explain what you want briefly about your requirement so i will help you buddy.

Hi,

 

If you getting same error please checkout below url

 

http://stackoverflow.com/questions/8206810/object-reference-not-set-to-an-instance-of-an-object 

Hi,

 

I have checked your code it is working fine in my end. I am not getting any error.

 

Try this bellow like message box using in form1.cs 

 

 

 

now you can call abc.cs file pass the paramtr it will call form1.cs and message is will displayed.

  

Thanks