Remote PC stops responding when the lines are added to a multiline textbox

Hello

When connected two RDP connections and multiline textbox is visible and always up-to-date (e.g. time real record on the screen), then all other processes and threads are suspended on the remote PC. For example, the task manage does not refresh, the clock stops, if you have a few applications running on this PC Server/services so their customers will get the writing/connect timeout errors, etc.

to reproduce this problem:

1. create a test application simulating recording in real time on the screen. For example, create a new GUI application (for example, in visual basic, delphi, etc.), several (for example six) textbox, control and set multiline = true (or use TMemo components in delphi), add the button and code to add rows in a loop (for example 200 iterations) these textbox/TMemo controls (see the sample code below). Build the executable

2. have three PC of loan. The first connect to second via RDP and from there linking to third parties via a second RDP connection. Third PC start test application, that you created in step 1. While the lines are added to the multiline/TMemo text box, try to do something with this PC, for example open the Task Manager, check how it is refreshing, open clock and note how seconds are proliferating, try to connect to some services from another PC (shared disk for example, ftp, web, etc.) and see how to answer they are

Windows 2000 seems to be ok, xp, 7, Server 2003/2008 have some problems

is there something that we could do to make the third-party application with real-time logging to the multiline/TMemo text box does not slow down or suspend our services that are running on the same PC, when someone connect via RDP? also, it would be great if microsoft could fix this problem

example code:

For i As Integer = 1 to 200
Dim s As String = «»
J As Integer = 1 to 10
Convert.ToString (i) & s = s & ""
Next J
TextBox1.AppendText (s & Chr (13) & 10)

J As Integer = 1 to 10
Convert.ToString (i) & s = s & ""
Next J
TextBox2.AppendText (s & Chr (13) & 10)

J As Integer = 1 to 10
Convert.ToString (i) & s = s & ""
Next J
TextBox3.AppendText (s & Chr (13) & 10)

J As Integer = 1 to 20
Convert.ToString (i) & s = s & ""
Next J
TextBox4.AppendText (s & Chr (13) & 10)

J As Integer = 1 to 20
Convert.ToString (i) & s = s & ""
Next J
TextBox5.AppendText (s & Chr (13) & 10)

J As Integer = 1 to 20
Convert.ToString (i) & s = s & ""
Next J
TextBox6.AppendText (s & Chr (13) & 10)
Next I

var
i: Integer;
s:string;
Start
for i: = 1 to 200 start
s:='';
While length<20 do="" s:="s+intToStr(i)+'">
glMemo1.Lines.Add (s);

While length<40 do="" s:="s+intToStr(i)+'">
glMemo2.Lines.Add (s);

While length<60 do="" s:="s+intToStr(i)+'">
glMemo3.Lines.Add (s);

While length<80 do="" s:="s+intToStr(i)+'">
glMemo4.Lines.Add (s);

While length<100 do="" s:="s+intToStr(i)+'">
glMemo5.Lines.Add (s);

While length<200 do="" s:="s+intToStr(i)+'">
glMemo6.Lines.Add (s);
end;

Thank you
Paulius

http://social.technet.Microsoft.com/forums/en-us/itproxpsp/threads

you might do better at the forum above. Good luck. :)

Tags: Windows

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