Comments by All Time Programming (Top 70 by date)

Nope that doesn't show the window only - the app just exits. Actually, I am able to access only my: DataGrid, DataGridCell, DataGridCellsPanel, DataGridHeaderBorder & DataGridRow - I tested in xaml to see if I can access DataGridColumnHeader or not !

Hi Wayne, I already added namespace in Window declaration. But yet in Style, I can't access my:DataGridColumnHeader. It gives me "The type reference cannot find a public type named 'DataGridColumnHeader'. "

To know if I can access it or not, in the main Panel, I tried typing
<my: &="" can="" have="" access="" to="" only="" datagrid,="" datagridcell,="" datagridcellspanel,="" datagridheaderborder="" and="" datarow="" in="" respect="" datagrid="" classes.=""
i="" tried="" adding="" inside="" <my:datagrid.resources=""> but can't access it here also - shows same error msg.
If I use DataGridCell, then all row's cell are set with the style and col headers only when mouseOver, else normal headers only. I want to have seperate style for Headers and Rows. How do I achieve Style with Col Headers ?

@John, the PNG has transparency colors. If it wouldn't be supportive then in Transparency tutorial project, it wouldn't show me the shapeful image. Even in an Image editor I see the image with transparent colors.

Thanks Ramalinga, but its a win forms app so no CSS or GDI+, etc.

Thanks Prerak, I had already loooked at that link. From that I just need the TekenRondeRechthoek() that does the painting rounded border. The issue is how, from where do I call that method. And for just 2 textboxes, this huge custom control, I don't think it worthful.
Is their any other solution, maybe simpler or a method via which I can call the above method.
Any help is highly appreciated.

Sanjay, the following links will help you achieve your goal :

Background Highlighting with the RichTextBox the System way:
http://www.codeproject.com/KB/cpp/tarrorichtextbox.aspx

Richer RichTextBox (Part 2):
http://www.codeproject.com/KB/edit/RicherRichTextBox.aspx

Look for Justification in below link
http://geekswithblogs.net/pvidler/archive/2003/10/15/182.aspx

Am sure the above links will provide you what you are looking for. I found the last one most helpful. Check out.

Are you saying is : This is the text
Rich Text Box
Justify Left & Right
Does it work ?
AND ON button click, you want is :
Rich Text Box
Justify Left & Right
Does it work ?
Something like this ? If not, send at : terry_513@yahoo.com
Confirm your requirements.

Kindly look at :
http://www.dotnetspider.com/resources/4644-Merge-columns-DataGridView-Excel-Spread.aspx
http://www.codeguru.com/forum/showthread.php?t=415930
http://social.msdn.microsoft.com/forums/en-US/winformsdatacontrols/thread/fea3dcff-5447-450a-8f7c-bb1c4f63371d/

For more, Google it and you will find lots of helpful solutions.

By default the RichTextBox's "RightToLeft" property is set to No which makes it left align.
On your button click event change "RightToLeft" property to "Yes" and your text will be right aligned.

Have updated the solution and also provided the code. Check out.

My 5. Return value is always more preferred and work best in all cases than out. Then you may return a single string or an string[], return type will work more better than out.

Thanks BobJanova, that did the work for me. Their was no need to use Invoke to call ConnectClicked. CallToReConnect is called on normal UI thread only.

What is the safe way wo work with this. If the user clicks close btn at that time then also the app doesn't crash. @Lukeer, with the above version if user tries to close app "x" it crashes.

Thank lukeer, Sorry am not good at this. The above code gave error "The name 'SomehowInvoke' does not exist in the current context". I added a method SomehowInvoke but that also didn't work - knowing that, that is not correct. What do I nned to correct with above code to make it work ?

Thanks Punit, In your while loop I have a problem. I can call a method (Connect()). If that fails - canot connect the I got to wait for 30 secs and then only try again. Over here what happens is as this is Asyn, Connect() has started its work, nect line i.e. check if its connected or not. As yet it is not connected, so it will wait for X secs and start Connect() again. I don't want this part to happen that's why I added the waiting in RunCompleted and then start background thread again which calls Connect(). Do you have a way to solve out this part ?

Was in full confusion for whose answer to Accept ! Voted 5 for each answer. But as Member_6499766 had lowest score from you 3 and his answer was to point, so accepted his. Solutions of 3 of you are right and appropriate to great extend. Thanks to all of you. Thanks.

Thanks to all of you. My app is a UI clirnt and I already use BackgroundWorker thread for all activities. The current case is, if the connection is lost, I want to try connecting untill suceeds or an erro occured. Maybe I call background thread for reconnecting, in RunCompleted how to make it call recursively untill a variable (connected) is set to true.
Do you say that in RunCompleted, I check the variable and if its false, call another mthod that inturn calls/starts backgroundthread ? And if error is raised the background thread is cancelled any ways.
Is this true by what I understand you experts are trying to say !

Yes Bob that worked out. I just had to set a fld on cancelbtn as on closing the window normally (without clicking any thign) also the results received by ShowDialog was DialogReselt.Cancel. The flag helped me check if cancelbtn was pressed on the event is cauht normally. Thanks alot.

Wayne, Thanks but the bgworker is nover cancelled and it works normally completing its task. But throws an exception "Object reference ...." If I press ok on that error, the app quits.

BobJanova, I got te backgroundworker thread running and also showing the dialog. Ofcourse,when the task called by DoWork is completed, it goes to RunWorkerCompleted and I close the child form over there. But, I also want the privilege to cancel the DoWork task when the Cancel button is clicked on the childForm. I tried thru EventHandler handling in the parentForm. But in childForm, in cancel_btn_click event if I write event DialogCanceled(this, new EventArgs()); it gives me error during compile time. How do I handle this ?

Actually not necessary that the user got to click "Cance" button. The dialog appears till the main form performs an activity. If the activity is finished, the dialog should be closed by main. If user clicks cancel then other code has to be performed by the main form. This is the exact scenario.

OriginalGriff, my mistake regardng asking for DB connectivity. Sorry its for Server connectivity. It would be good if you can look at the code and guide me accordingly. - Thanks

Any help/guidance for the above query ?

Kindly refer the changes doen in the question and try to help accordingly. Please. I don't understand which aspect of threading to use and how to start with it. Once I get that part, will be ble to move ahead with it. Would be glad if you can help for it also. Thanks.

Marcus & OriginalGriff, Kindly have a look at the updated question. Thwie was mistake in my question and try to help me regarding it. -Thanks

John, I made a 32bit and 64bit versions of my app. And als oa 32bit detector app. Am not able with the further steps. Can you please be precise about it and help me out. Thanks.

I don't want version, I want architecture. If I get Version as Vista, then that's avaialble for 32 bit also and 64 bit also. So architecture is imp than version and VersionNT provides only version. Thanks. Any way to find architecture.

Thanks Oliver, But if that key is found the value returned is "" as their is only Default property whose value is "". If the key isn't found then also the value remains "" only. So it doesn't help in either ways.

John, I can create a small app that helps meknow the system is of 32 or 64 bit and I create an installer for the same. From my main installer I will run the above installer. How will the main installer know the results that are found by the 32 bit installer ? I don't get how will be the flow. Created a 32 bit (detect 32/64 bit) installer and other 2 installers for main app for 32 bit and 64 bit. Now how to proceed, I don't understand you that flow. Unless I don't execute the 32bit application, how can I even note anywhere the system info. Can you please clear it .

Thanks

Thanks Olivier,

can you or anyone tell how to check the registry node in installation file ???

Thanks John, Actually the setup needs to install a driver in installation proess. And the exe file for the drive differs for 32 & 64 bit. In that case wanted to know if in installtion I can find the architecture then can execute respective exe file only (I guess using some Custom Actions that are meant for such things.). The whole application runs on 32 and 64 bit finely, just this driver installation is causing the problem. I have writen code in my app, that can tell me the OS, and architecture, but that will be executed after install & while executing. I want to install the driver while installation only.
I hope I have made myself very clear. In this case how to tackle.

Thanks

Ok, so windows version may not be a factor for me but architecture is surely is. While installation, based on 32/64 bit have to execute an exe file. I use Setup Project of Visual Studio. Can you tell something about this.
Thanks

Thanks Eduard,
Can you tell something more about the "running process" in the SEtup Project to identify the windows version. And an idea on how to work out.

I have used Setup Project of Visual Studio 2008.

Friends, have already added my code in the question. I hope that will help you to know my problem much better. Thanks.

I didn't get what you are trying to say !!

Thanks JF2015.

Asking the user to set the file as "Run as Admin", doesn't look professional. I have seen applications that use openvpn and doesn't need or any UAC prompt comes up. I was also looking for such kind of solution. Well, I found that problem in Win 7 and today only found that if I run as admin & set the Compatibility mode, the problem doesn't arise i.e. openvpn runs else it wasn't running only. So thought to add it for a better application.

Thanks Nishant & John. I will chekc both the links add my app details to Regitry and do the needful. Before that I have a question, In my application, I use openvpn.exe. If I set the Registry and UAC settings as you both said, will my application be able to run the openvpn.exe as an admin. I got to run openvpn.exe as Admin. My application itself doesn't need so but openvpn needs it in windows 7. So by doing the above will my application be able to run openvpn.exe (from cmd) as an Admin. Whose Compatibility mode should I change? It needs to be chanegd of openvpn.exe. Kindly help me know that will the above able to achieve my goal ? Thanks for your prompt response and look ahead for the same. Thanks.

tHANKS jf2015, I tried with Enviornment.CurrentDirectory + "\\openvpn...." . This should work with all cases I think so. Am I right or wrong ?

Thanks SA. My work is like on a btn click, a activity is done that takes some time. I show a waiting dailog (another component) to let the user know that some & what process is going beyond. Based on the process of the activity, i wanted to update the labels of WaitingDialog dialog. In this case, what Prerak Patel showed worked best for me. Thanks SA.

Thanks Manas. It helped me gain what it wanted to do. Thanks once again.

Perak Patel, Thanks a lot. Yes I implemented waitDlg.Message in backgroundWorker1_ProgressChanged and for calling backgroundWorker1.ReportProgress(0, message). Thanks a lot once again.

Thanks. Had a look at the link, but didn't get it .CODE has been added above from "Here is the code :". I will have 2 types of messages : "Retrieving data from ..." & "Falure" that are used in methods that are called via backgroundWorker thread. How do I add delegate, I don't know. Do you mean that whenever I want to change the message I should set the msg in some variable and somehow call progresschanged and add waitDlg.Message = newMessage; ??? Kindly guide me. - Thanks

I had a look at the BackgroundWorker. My requirement is I don't want any progress bar or so. Only a kind of Modal dialog with text like "Connecting" or "Retrieving..." while a method is executing. Once the method is executed, the dialog goes away. That's it. Modal dialog because, user know somethign is going on and he can't access any other form resources.

I added backgroundWorker on my form, but didn't get an idea of how to display a dialog with message and call the method and show the dialog till its done.

Can any body guide me for hte above.

Thanks

John, the server prints date and time prior to message, so I can' use startsWith(). But changed string.isullOrEmpty(d).
The out was :
LINE = Wed Feb 02 20:15:56 2011 Cannot load file :fopen:No such file or directory: error:2006D080:BIO routines:BIO_new_file:no such file: error:0B084002:x509 certificate routines:X509_load_cert_crl_file:system lib
LINE = Wed Feb 02 20:15:56 2011 Exiting
Execution Completed

This says that "Cannot load file" has come from output. But when I debug, the cursor goes once in ConnectServer() and then stays in while loop only.

then how to achieve it ?

My process wont be completed as I am connecting to server so it has to stay untill I disconnect it from app.

Can you help me our guide me for the above .

Thanks

Thanks a lot. I guess last query reg the topic :
Am not ablt to stop the thread. Thread still seems to be alive/active. My code:
<pre>
try
{
conThread = new Thread(new ThreadStart(StartConnect));
conThread.Start();
//conThread.Abort(); // SEEMS NOT TO EXECUTE
}
catch (ThreadAbortException te)
{
Console.WriteLine("Abort Exception CAUGHT");
}
catch (Exception ex)
{
if (ex.Message.Equals("NotConnectedException"))
MessageBox.Show("Unable to connect to the Server", "Time Out", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
else
MessageBox.Show("Error connecting to the Server : " + ex.Message, "Failed to Connect", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
finally
{
conThread.Abort(); // SEEMS NOT TO EXECUTE
Console.WriteLine("Thread ISAlive = " + conThread.IsAlive); // Shows TRUE
}
MessageBox.Show("***************** Connected To VPN Server - " + connectedTosERVER); // DISPLAYS

Console.WriteLine("Execution Completed "); // DISPLAYS
</pre>

aFTER starting the thread and once the StartConnect()is executed, i should stop/suspend the thread in any way. Calling Abort() after start() or in finally block seeems to have no response. And IsAlive still shows true only. I want ot stop the thread and I belive isalive should show false as the thread is no more active. The MessageBox and "Execution Completed" is also shown. But what about stopping - i mean closing the thread from scratch as the same thread wont be used anywhere in the app except again in the same method.

I looked alot on various sites and tutorials, but couldn't find the solution. Thread.Suspend does, but it is deprecated so don't want to use that one.

What can be the best solution or am I misunderstanding anything here ?

Thanks a lot.

How do you get the timepassed ? I lloked at Thread, Timer(s), DateTime but couldn't find anything that can tell me how much time has passed. Well in DateTime can get the milisecond but of the current time and not timer wise.
For implementation I came to :
<pre>
Thread conThread = new Thread(new ThreadStart(StartConnect));
conThread.Start();

private void StartConnect()
{
int timeout = 30000, timepassed = 0;

OpenConnect oc = new OpenConnect(cmd, timeout);
int retVal = oc.ConnectToServer();
while (!oc.Connected)
{
if (timepassed > timeout)
throw new Exception("NotConnectedException");
Thread.Sleep(100);
}

if (retVal == 1)
Console.WriteLine("YES CONNECTED AND RETURNED");
}
</pre>

This would be more safe , if I am not wrong.
Please guide me.

I am not getting your point. Can you show a code or sample on other url. According to you, it should be something like this :
<pre>
process.OutputDataReceived += new DataReceivedEventHandler(Process_OutputDataReceived);
while(connected) {
}
</pre>

I feel am wrong somewhere but don't get where. With this the process will also be live and the stringBuffer will also be filled continously, right !

I will Accept your ans and also vote 5, but once my point is suceeded. Have faith.


Thanks

Tried to implement in a new class :
<pre>
public class OpenConnect
{
private Process process;
private ProcessStartInfo processInfo;
private bool connected;
private string command;
private int timeOut, ExitCode = -1;
private StringBuilder sb;

public OpenConnect(string Command, int timeOut)
{
this.command = Command;
this.timeOut = timeOut;
init();
}

private void init()
{
processInfo = new ProcessStartInfo("cmd.exe", "/C " + command);
sb = new StringBuilder();
processInfo.UseShellExecute = false;
processInfo.RedirectStandardOutput = true;
processInfo.CreateNoWindow = false;
}

public int ConnectToServer()
{
try
{
process = Process.Start(processInfo);
process.BeginOutputReadLine();
process.OutputDataReceived += new DataReceivedEventHandler(Process_OutputDataReceived);

if (connected)
return 1;
/*

// Get the results
string result = process.StandardOutput.ReadToEnd();


Console.WriteLine("Process Result = " + result);
//Process.WaitForExit(30000);

ExitCode = process.ExitCode;
Console.WriteLine("%%%%%%%%%%% EXIT CODE = " + ExitCode);
process.Close();*/
}
catch (Exception e)
{
Console.WriteLine("Error Processing ConnectToServer : " + e.Message);
}
finally
{
//Process = null;
//ProcessInfo = null;
}
return ExitCode;
}

private void Process_OutputDataReceived(object sender, DataReceivedEventArgs e)
{
string d = e.Data;
Console.WriteLine("LINE = " + d);
if (d != null && d.IndexOf("Initialization Sequence Completed") > 0)
{
connected = true;
Console.WriteLine("********* Connected = " + connected);
}
}

public void DisconnectServer()
{
processInfo = null;
if (process != null)
{
process.Close();

}
}


}
}

</pre>

How to check the state of connected over here ?
If I return from this class, I believe the process will be working on background and I will be able to call Disconnect and it will perform as expected. Please correct me If i got to improve something here.
And for the state of connected ?

Thanks

Yes JF2015. That helped to display data directly to console. Now I got to return the funtion when I read "Initialization Completed". In the delegate(), I might write :
<pre>
string d = e.Data;
Console.WriteLine("LINE = " + d);
if (d != null && d.IndexOf("Initialization Sequence Completed") > 0)
{
connected = true;
Console.WriteLine("********* Connected = " + connected);
}

AND IN ExecuteCommand CODE :
process = Process.Start(ProcessInfo);
process.BeginOutputReadLine();
process.OutputDataReceived += new DataReceivedEventHandler(Process_OutputDataReceived);

if (connected)
return 1;

</pre>
iN MY OUTPUT I GET :
LINE = Tue Feb 01 17:01:27 2011 Initialization Sequence Completed
********* Connected = True

But the if(connected) is not executed to return. I want to keep the process live and return. How to return from ExecuteCommand.

I guess i got to create a seperate class for this where Process is a member and can keep it ailve and kill when am done.

What do you say ?
How to return form the delegate() ?

Thanks

I tried your latest code, but that also doesn't help. My command is :
openvpn --config client.ovpn --ca certificate.cer --auth-user-pass user.txt

Trying to connect to openvpn.
And when I find "Initialization Sequence Completed" I want to return to inform the user about connection successful. With your code also I don't see any text without pressing Ctrl+C. To stop openvpn, I got to press "F4" on command prompt. Till then the command prompt is active and in running mode. But I want to return my function once I have connected or receive any such error message from the openvpn.

From the link you provided, do you think "BeginOutputReadLine" could be of use as that's the only thing I have not implemented or tried in my code.

Thanks