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A while ago I wrote this article[^] for a simple numeric text box. It would need some alteration to allow a decimal point and to check the number is valid for your requirements (at the moment it only allows numeric input i.e. it is still a text box and not a NumberBox) but it could serve as a starting point. It handles copy and paste via keyboard/mouse and all edit keys etc...
Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)
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Why not using a ConvertEventHandler delegate ?
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You need only to check the text of textbox. My textbox is name tAmount
private void tAmount_KeyPress(object sender, KeyPressEventArgs e)
{
int isNumber = 0;
Update();
string tmp = Convert.ToString(tAmount.Text);
if (tmp.Contains(".") == true)
e.Handled = !int.TryParse(e.KeyChar.ToString(), out isNumber) && (e.KeyChar != '\b');
else
e.Handled = !int.TryParse(e.KeyChar.ToString(), out isNumber) && (e.KeyChar != '\b') && (e.KeyChar != '.');
}
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Hi
I need to know how to get notified whenever the createDCW() in gdi32.dll is called from other applications. i want to insert data between each startpage and endpage.
Please help!!
Thanks in advance
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There's no such thing as "hooking" that call. Hooking refers to an entire differect concept in Windows.
You actually have to redirect the call, using a library called "Detours[^]" from Microsoft Research. You can read more on the technique here[^] and here[^]. Oh, and you can't do it in managed code, i.e. C# or VB.NET.
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OK. So I'm trying to inherit from the ComboBox control (desktop) to make a custom time picker based on some unknown interval of time units. Every time the Increment (meaning interval) property is updated, therefore, the list of items needs to be repopulated. The Increment property can also be set using the designer. My item population code is set in a private method:
private void RepopulateChoices()
{
Items.Clear();
int i = 0;
while (i < 1440)
{
DateTime dat = new DateTime(1, 1, 1, i / 60, i % 60, 0);
if (ShowMilitary)
Items.Add(dat.ToString("HH:mm"));
else
Items.Add(dat.ToString("h:mm tt"));
i += Increment;
}
}
You can see the very first thing I do is clear the existing items from the control. I then iterate through 1440 minutes in a day, incrementing in "Increment" number of minutes.
With a default Increment of 30, there should be 48 items in the final list. However, I always see more than 48, and the number increases for every nested container. I.e., after "11:30 PM" comes another entry of "12:00 AM" and the cycle starts all over again.
dropped directly on a form: 96 items (2 days' worth)
dropped into a panel on a form: 192 items (4 days' worth)
dropped into a panel in a TableLayout container on a form: 284 items (6 days' worth)
WHAT THE HECK IS GOING ON HERE?
I have ruled out accidental population routines in the primary app because I can duplicate the behavior dropping this control onto a form in the app where no instance of the control already exists.
The RepopulateChoices() method is the ONLY place where I am populating items. Since that method starts with an Items.Clear() instruction, how on earth can I be getting massive quantities of duplicate entries???
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You example works on my side:
Try this with TimeSpan, this may be due to local settings (culture)
int Elapse = 30;
comboBox1.Items.Clear();
int i = 0;
DateTime convertedDate = DateTime.SpecifyKind(DateTime.Parse("00:00:00"), DateTimeKind.Local);
while (i < 1440)
{
convertedDate = convertedDate + new TimeSpan(0, Elapse, 0);
if (ShowMilitary)
comboBox1.Items.Add(convertedDate.ToString("HH:mm"));
else
comboBox1.Items.Add(convertedDate.ToString("h:mm tt"));
i += Elapse;
}
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Not sure why that would make a difference. I also noticed a syntax difference between your code and my code:
Migounette wrote: comboBox1.Items.Clear();
I did not use a designer to make a custom control. I inherited directly from ComboBox. I call Items.Clear() from RepopulateChoices(), which is a private method in the inherited class. All of your code starting with "comboBox1..." is not at all how I'm doing things.
I'm going to make another post to clarify as there seems to be a tremendous amount of confusion over this from all respondants.
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Xpnctoc wrote:
private void RepopulateChoices()
{
Items.Clear();
What is Items???
It should be something like
this.myComboCtrl1.Items.Clear(); or without the this.
Who calls the RepopulateChoises method??
Elaborate.
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I found this code, that should validate an Email address according to the RFC2822.
Now im not the big regex user so i would like it if someone could verify this for me.
^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$
Thanks..
With great code, comes great complexity, so keep it simple stupid... 
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You might want to read this[^] page on validating email addresses. It's very enlightening, and should go a long way to answering your question (pay attention to items such as international email addresses).
"WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
My blog | My articles | MoXAML PowerToys | Onyx
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Thanks Pete, will do...
With great code, comes great complexity, so keep it simple stupid...
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Good evening,
I am trying to work out if it is possible to work out which DLL the RunDLL32.exe process is "running" through C# (or C++)
Any help/guidance would be sincerely appreciated
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The Modules list doesn't actually contain the dll that's loaded by rundll32. You need to do extra work to get that information.
"WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
My blog | My articles | MoXAML PowerToys | Onyx
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You can do this with WMI. Here's a sample combining the Process and ManagementObject classes to show some useful info:
string process = "SELECT CommandLine FROM Win32_Process WHERE ProcessID = {0}";
foreach (Process p in Process.GetProcessesByName("rundll32"))
{
using (ManagementObjectSearcher mos = new ManagementObjectSearcher(string.Format(process, p.Id)))
{
foreach (ManagementObject mo in mos.Get())
{
string[] commandLine = mo["CommandLine"].ToString().Split(',');
Console.WriteLine(string.Format("{0} was started at {1}.",
commandLine[0].Substring(commandLine[0].IndexOf(" ") + 1), p.StartTime));
}
}
}There's a whole hunk of substringing going on with the command line to get the DLL because the command line would be Rundll32.exe c:\PathToMyDll\MyDll.dll,Entrypoint so we need to parse it out.
"WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
My blog | My articles | MoXAML PowerToys | Onyx
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Thanks very much, this works and works well!
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Kindly check the below program.
using System;
namespsace TestException3
{
Class program
{
static void Main(string args[])
{
try
{
string s1,s2,ans;
char type,type1;
Console.WriteLine("please enter the variables : ");
s1=Console.ReadLine();
s2=Console.ReadLine();
type=Convert.ToChar(s1);
type1=Convert.ToChar(s2);
if(!(char.IsDigit(type)) || !(char.IsDigit(type1)))
{
throw new Exception("Please Enter numbers only");
}
else
{
ans=Convert.ToString(Convert.ToInt32(s1)+Convert.ToInt32(s2));
Console.WriteLine(Answer : {0}",ans);
Console.ReadLine();
}
catch(Exception e)
{
Console.WriteLine("Message : {0}", e.Message);
Console.ReadLine();
}
}
}
}
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Hint:
string number = "1234567890";
foreach (char c in number)
{
Console.WriteLine(c);
}
Another Hint:
int iNum = 0;
string strNum = "1234567890";
if (int.TryParse(strNum, out iNum))
{
Console.WriteLine(iNum);
}
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You could try the following.
ConsoleKeyInfo ck = Console.ReadKey();
char Key = ck.KeyChar;
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Try this:
public void test()
{
try
{
Console.WriteLine("Please enter the variables : ");
Int32 valueOne = ConvertLine(Console.ReadLine());
Int32 valueTwo = ConvertLine(Console.ReadLine());
Console.WriteLine("Answer : {0}", valueOne + valueTwo);
Console.ReadLine();
}
catch (Exception e)
{
Console.WriteLine("Message : {0}", e.Message); Console.ReadLine();
}
}
private int ConvertLine(string value)
{
try
{
if (String.IsNullOrEmpty(value) == false)
{
return Convert.ToInt32(value);
}
Console.Error.WriteLine("Empty field is not supported : default value used 0");
}
catch (Exception exception)
{
Console.Error.WriteLine(String.Format("{0} : default value used 0", exception.Message));
}
return 0;
}
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I have a problem with a webbrowser control not displaying an image from the local harddrive of the Windows Mobile 5 PocketPC I have.
Basically I am writing the HTML code to the browser:
webBrowser.DocumentText = @"
<html>
<body style='text-align: center; margin-left: auto; margin-right: auto'>
<img src='" + AppPath + @"\loading.gif' />
</body>
</html>";
The AppPath is:
private string AppPath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().GetName().CodeBase);
Now I had it throw a message box before that and it gives: "\Program Files\Mobile Inventory" which if you add \loading.gif on that it would be correct. I have even verified that the loading.gif image file was in that location and it was.
It still just shows a red X. If you are wondering why I am doing it this way instead of a picture box it is because a picturebox on win mobiile cannot display animation. (Nice huh)
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This may not be the answer, but I had similar problems with ASP.NET, and resolved it when I realized all paths are relative to the page current directory.
You can try replacing the AppPath with "~" for a web-centric root, or
Use "<%= Page.ResolveUrl("~")%>" in the path, and it all resolves in ASP.NET:
Resources/Images/Logos/myLogo.gif" />
(and yes, I know the double quotes don't look right - works though.)
Gotta be worth a try.
All those who believe in psycho kinesis, raise my hand.
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I didnt have any luck with that.
<img src="<%= Page.ResolveUrl("~")%>Resources/Images/Logos/myLogo.gif" />
doesn't work because of the quotes. Using the quotes ends the string line. I did try:
<img src='<%= Page.ResolveUrl('~')%>Resources/Images/Logos/myLogo.gif' />
But was unable to get that to work. I also tried just this:
<%= Page.ResolveUrl('~')%> to see if it would just print the URL it resolved and it prints nothing.
I also tried this:
<img src='/Program Files/Mobile Inventory/loading.gif' />
Which is the exact path and it still won't work! I also tried:
<img src='loading.gif' />
LOL.. so frustrating! It shoul be easy! This is a Windows Mobile version 5 (not 6) barcode scanner
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