Re: How Create Code File - C# Discussion Boards

C# 2.0 ToolTip on ChildPanel

6-Jan-06 19:30

monrobot13 wrote:
use a timer to check if an alarm time has been hit

That seems about right. You could get by with a single (reasonably high resolution - eg: < 1 Sec.) timer or one timer per alarm (assuming you can have multiple alarms). A single timer is of course less resource intensive.

/ravi

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Re: Alarm Clock

monrobot137-Jan-06 10:07

monrobot13

7-Jan-06 10:07

Thanks very much for the info.

- Aaron

kselman6-Jan-06 18:14

kselman

6-Jan-06 18:14

I have large child panel control Im using for a direct3D render engine. I want to use the balloon tooltip when they mouse over XY locations on the child panel. I want to use the popup event already in the ToolTip control to check whether their over an acutual item or not.. if not.. bail out...

my problem is.. the ToolTip only shows up once... popup only gets called once.. im not surprised because its one big control and Im still within its bounds.. but is there anyway around this?

How Create Code File

raab20056-Jan-06 14:06

raab2005

6-Jan-06 14:06

I need create in code file, some code for read text file, that contain a string of connection of my database like that

Data Source=(local);Initial Catalog=IUSA;Integrated Security=True

and put that string in a public variable for use in all the project, but i need some idea about that, because in vb.net, i used that, how can do that in C#

Module CONECTA
Public cadenaconexion As String
Public pcodpro As String
Public pcodcli As String
Public pnomcli As String
Public pprecio As String
Public pexipro As String
Public tb As New TabControl
Public P2 As New Collection
Public tcodpro As TextBox
Public cndb As New SqlClient.SqlConnection
Public cndb1 As New SqlClient.SqlConnection
Public cndb2 As New SqlClient.SqlConnection
Public usuario As String
Public fechafactura As String
Public tdoc As String
Public PrmPathExcelFile As String
Public consultaclientes As INQCUSTOMER
Public consulta As PRODIQ1
Public factura As MTTOFAC
Public fmtfecha As FMTDATE
Sub main()
Dim myStreamReader As System.IO.StreamReader
Dim myInputString As String
Try
myStreamReader = System.IO.File.OpenText("C:\SQLCONECTA.TXT")
myInputString = myStreamReader.ReadLine()
Catch exc As Exception
MsgBox("Archivo de Conexion no se Puede Abrir o no Existe." + vbCrLf + _
"Por favor Verifique Que el Archivo Este Bien, " + _
vbCrLf + "Exception: " + exc.Message)
Finally
If Not myStreamReader Is Nothing Then
myStreamReader.Close()
End If
End Try
cadenaconexion = myInputString
cndb.ConnectionString = cadenaconexion
cndb1.ConnectionString = cadenaconexion
cndb2.ConnectionString = cadenaconexion
Dim ACCESO1 As New ACCESO
ACCESO1.ShowDialog()
End Sub
End Module

Re: How Create Code File

Guffa6-Jan-06 14:34

Guffa

6-Jan-06 14:34

Just do it the same way. The framework is still the same, so the System.IO namespace still works exactly the same.

---
b { font-weight: normal; }

Re: How Create Code File

AndrewPeters6-Jan-06 14:49

AndrewPeters

6-Jan-06 14:49

Out of curiosity, why are you using a module in the first place? For an object that you only want one instance of, check out the singleton design pattern. It is much more elegant than global variables or global functions (like what this module is doing essentially).

Check out singleton pattern on this site or on Google.

Another good option that most enterprise applications use is storing database connection information in a config file. .NET comes with app.config which can be used through the System.Configuration classes. You can also wrap your own with an XmlReader.

Andrew Peters, MCSD
Fabrefactum Software

Re: How Create Code File

raab20056-Jan-06 15:25

raab2005

6-Jan-06 15:25

You have, some example for that ???

Help

aPerfectCircle6-Jan-06 11:56

aPerfectCircle

6-Jan-06 11:56

this seems easy but I just got stuck
I just wanna display an error message if the textBox is left empty, and display another error Message if the entry is not an integer.
I used the if statement (if var=="")
MessageBox.Show(" you must enter anumber")
but it gives me an error message everytime I try to compile ...Help please

aPerfectTool

Ravi Bhavnani6-Jan-06 12:01

6-Jan-06 12:01

int nFoo = 0;
string strFoo = myTextBox.Text.Trim();
if (strFoo.Equals (String.Empty)) {
    <code>// empty</code>
    ...
} else {
    try {
      nFoo = int.Parse (strFoo);
    } catch (Exception) {
      <code>// not an int</code>
      ...
    }
}

/ravi

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aPerfectCircle7-Jan-06 15:05

aPerfectCircle

7-Jan-06 15:05

hey ravi thanks for your quick response,
I'm still having the same problem, when i run the code, it always do the try and catch first with leaves me with only one error message<invalid data="" entered="">
if I leave the textBox empty the program just bomb on me !!!!???

aPerfectTool

Ravi Bhavnani8-Jan-06 5:24

8-Jan-06 5:24

aPerfectCircle wrote:
the program just bomb on me

I'm not sure I understand. Please post your button's click handler code.

/ravi

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aPerfectCircle8-Jan-06 5:47

aPerfectCircle

8-Jan-06 5:47

hey Ravi I just got it working thanks for your help Smile | :)

aPerfectTool

Ravi Bhavnani8-Jan-06 5:50

Starting a new process and waiting

8-Jan-06 5:50

Excellent!

/ravi

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SeanCM6-Jan-06 11:46

SeanCM

6-Jan-06 11:46

Hi,

I need to start a process and wait for it. I have tired several things, but it keeps locking the originating program up while the other process is running and wont even refresh. I would like it to behave like normal but just wait and not allow the user to do anything...pause but still refresh when you drag a window over it. The code for the most part is right out of the MSDN.

This is the code I have right now:

// These are the Win32 error code for file not found or access denied.
const int ERROR_FILE_NOT_FOUND =2;
const int ERROR_ACCESS_DENIED = 5;

Process myProcess = new Process();
            
try
{
	myProcess.StartInfo.FileName = Application.StartupPath + "\\" + ProgramName; 
	myProcess.StartInfo.UseShellExecute = true;
	myProcess.Start();
	myProcess.WaitForExit();
}
catch (Win32Exception e)
{
	if(e.NativeErrorCode == ERROR_FILE_NOT_FOUND)
	{
		MessageBox.Show("Install file can not be located.");
	} 
	else if (e.NativeErrorCode == ERROR_ACCESS_DENIED)
	{
		// Note that if your word processor might generate exceptions
		// such as this, which are handled first.
		MessageBox.Show(ee.Message + 
			". You do not have permission to run this file.");
	}
}

Sean

Ravi Bhavnani6-Jan-06 11:57

6-Jan-06 11:57

I expect the call to WaitForExit() causes the caller to block?

/ravi

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SeanCM6-Jan-06 12:13

SeanCM

6-Jan-06 12:13

Yes it does, but I need it to. I need the main program to wait to the called program exits before it can go on. But the things I have tried break the main program's ability to refresh, resize, minimize, maximize, etc... I don't want it to look like it is not responding I just want it to wait patiently and behave. Smile | :)

Sean

Dave Kreskowiak6-Jan-06 12:13

Dave Kreskowiak

6-Jan-06 12:13

WaitForExit is a blocking call, so if you call this method on the UI thread, it'll stop you from repainting the form. Sooo, you don't call it.

What you can do is set the new Process' EnableRaisingEvents property to True. Now, when the Process exits, it'll fire a Exited event which your app can subscribe to.

But, before(!) you start the process, disable all the user controls you don't want the user to play with while this process is running. In your Exited event handler, you can re-enable all the controls.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

-- modified at 18:13 Friday 6th January, 2006

SeanCM6-Jan-06 12:16

SeanCM

6-Jan-06 12:16

Ah, OK thanks. That makes sense. Is there a way to disable all the controls? Well except for the main windows things mentioned above, resize, minimize, etc... I am sure there is, never mind, I will go look it up. Thanks for getting me that far though.

Sean

Ravi Bhavnani6-Jan-06 12:21