i want to use c# text.invoke function in asp.net web

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1.00/5 (1 vote)

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hii

i got astrange situation iam converting c# windows application to aweb based application , inside the code there is function called textbox.invoke()

its for multithreading application as i understand

so .. what function can used in web like it

C#

private void Log(LogMsgType msgtype, string msg)
    {
      rtfTerminal.Invoke(new EventHandler(delegate
      {
        rtfTerminal.SelectedText = string.Empty;
        rtfTerminal.SelectionFont = new Font(rtfTerminal.SelectionFont, FontStyle.Bold);
        rtfTerminal.SelectionColor = LogMsgTypeColor[(int)msgtype];
        rtfTerminal.AppendText(msg);
        rtfTerminal.ScrollToCaret();
      }));
    }

rtfTerminal is a textbox !
this is the code part
thx

Posted 24-Dec-12 1:13am

promarkoo

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Sergey Alexandrovich Kryukov 24-Dec-12 13:03pm

Why?! Do you know what Invoke is for? It's only for threading.
—SA

2 solutions

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Thomas Daniels · Answer 1 · 2012-12-24T02:18:00

Solution 1

Hi,

The ASP.NET controls doesn't contain a Invoke method, because a web form has another thread affinity then Windows Forms, so ASP.NET controls don't provide a Invoke method. In your web form, you don't need to use a Invoke method or something similar.

Posted 24-Dec-12 2:18am

Thomas Daniels

Comments

promarkoo 24-Dec-12 9:25am

how i can append text and send and recieve text without reloading page and without invoking !

Thomas Daniels 24-Dec-12 9:28am

Hi,
Have a look here:
http://forums.asp.net/t/1281566.aspx/1

Sergey Alexandrovich Kryukov 24-Dec-12 13:15pm

I answered in some details about logging, please see Solution 2.
—SA

Sergey Alexandrovich Kryukov 24-Dec-12 13:03pm

Of course, a 5. And threading (Invoke is only needed for threading), is somewhat foreign topic with ASP.NET.
—SA

Thomas Daniels 25-Dec-12 4:01am

Thank you!

promarkoo 26-Dec-12 5:56am

thx alot guys
well i ll tell u what im trying to do
i got serialport application
http://msmvps.com/blogs/coad/archive/2005/03/23/SerialPort-_2800_RS_2D00_232-Serial-COM-Port_2900_-in-C_2300_-.NET.aspx
and i want to make it web aplication ,,, i already converted most of the code .. but there is some function windows .
if u have time u can help .
thx

Sergey Alexandrovich Kryukov · Answer 2 · 2012-12-24T07:16:00

Solution 2

As Solution 1 correctly tells you, you don't need to use Invoke in ASP.NET, but your problem is stemmed from the fact that you did not even know how and why to use it even in System.Windows.Forms, so you abused it. Please see my past answers:
Control.Invoke() vs. Control.BeginInvoke()[^],
Problem with Treeview Scanner And MD5[^].

In your ASP.NET case, you can simply remove redundant lines:

C#

void Log(LogMsgType msgtype, string msg)
{
    rtfTerminal.SelectedText = string.Empty;
    rtfTerminal.SelectionFont = new Font(rtfTerminal.SelectionFont, FontStyle.Bold);
    rtfTerminal.SelectionColor = LogMsgTypeColor[(int)msgtype];
    rtfTerminal.AppendText(msg);
    rtfTerminal.ScrollToCaret();
}

But, if this is really the logging, it is not a good solution. You need to learn about ASP.NET logging.

One widely used product is Apache log4net. Please see:
http://logging.apache.org/log4net/[^].

This CodeProject article could be useful:
log4net Tutorial[^].

—SA

Posted 24-Dec-12 7:16am

Sergey Alexandrovich Kryukov

Comments

__TR__ 24-Dec-12 14:00pm

+5

Sergey Alexandrovich Kryukov 24-Dec-12 14:06pm

Thank you,
—SA

__TR__ 24-Dec-12 14:12pm

I just noticed something that's not related to this post.
This [^] person is in number 2 spot for Top Experts in 24hrs, but has not answered a single question in last 2 days. something is not right. What do you think?

Sergey Alexandrovich Kryukov 24-Dec-12 14:48pm

I don't know. These top lists really looked weird to me during last days. Will you rather report it to
http://www.codeproject.com/Forums/1645/Site-Bugs-Suggestions.aspx?
—SA

__TR__ 24-Dec-12 15:17pm

Just posted it in site Bugs/suggestion forum. The list keeps refreshing regularly, so by the time someone looks at that post this person may not be listed in the Top expert in 24 hrs list. Lets hope if there is a bug it gets fixed.

promarkoo 26-Dec-12 5:04am

thx alot guys
well i ll tell u what im trying to do
i got serialport application
http://msmvps.com/blogs/coad/archive/2005/03/23/SerialPort-_2800_RS_2D00_232-Serial-COM-Port_2900_-in-C_2300_-.NET.aspx
and i want to make it web aplication ,,, i already converted most of the code .. but there is some function windows .
if u have time u can help .
thx

Sergey Alexandrovich Kryukov 26-Dec-12 17:16pm

No, this is not clear. What are you going to communicate via the serial port? Some device on server side? What? Why? Some device on client side? Relax, the client computer is not accessible to a Web application (thank goodness it is not accessible!).

Serial applications normally need a separate thread for serial communications. Did you do it on a desktop application? If not, you have nothing to "convert"... If yes, "conversion" is very questionable or may be does not make sense...

—SA

promarkoo 27-Dec-12 4:45am

well if u checked the link i added u ll find afully functional application with explanation ... i found it on web .
well .. u can say that this application is apart of bigger application associated with sensors and other stuff .
but we need it web application :S
thx

http://msmvps.com/blogs/coad/archive/2005/03/23/SerialPort-_2800_RS_2D00_232-Serial-COM-Port_2900_-in-C_2300_-.NET.aspx

Sergey Alexandrovich Kryukov 27-Dec-12 14:58pm

How come you cannot understand the very simple thing you need to understand before you even can further discuss it?
This is the application which can interactively talk to something via RS-232. This is not a real product, just a demo.

If you try to do it in ASP.NET application, what is it supposed to communicate with? If it happens on the server's host, what could be attached to it? do you have access to it? If this is a client host, the Web applications do not have access to it.

Also, the application uses a thread. How could it do on ASP.NET application? Do you understand that all the runtime goes between each single HTTP request to respective HTTP response? What do you want to have during this time?

Before you realize it, there is nothing to talk about.

The problem is not implementation problem, the problem is that you need to understand what you really want. It does not look like you do.

—SA