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Include the Visual Basic library and use the IsNumeric method.
A man said to the universe:
"Sir I exist!"
"However," replied the Universe, "The fact has not created in me A sense of obligation."
-- Stephen Crane
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Greeeg wrote: a sorted list via a listbox control
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Here is an easy way that doesn't rely on exceptions, regular expressions, or legacy VB libraries:
double numericValue;
bool isNumeric = double.TryParse(myTextBox.Text, out numericValue);
Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Messianic Instrumentals (with audio)
The apostle Paul, modernly speaking: Epistles of Paul
Judah Himango
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Unfortunately there's no int.TryParse method to accompany that one.
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Yes, there is an Int32.TryParse().
...or, at least I hope so, because I've used it...
-Daniel
Typing too fast fro my owngood
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dan neely wrote: Unfortunately there's no int.TryParse method to accompany that one.
Fortunately there are:
<br />
Int16.TryParse(string s,out short result)<br />
Int32.TryParse(string s, out int result)<br />
Int64.TryParse(string s,out long result)<br />
_____________________________
Success is not something to wait for, its something to work for.
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U can just use a simle java script for that.
Vipin
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Vipin Venugopal wrote: U can just use a simle java script for that.
<input type=text name=txtPostalCode removed="if(!isNS4){if(event.keyCode > 45 || event.keyCode > 57) event.returnValue = false;}else{if(event.which < 45 || event.which > 57) returnfalse;}">
What?
Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Messianic Instrumentals (with audio)
The apostle Paul, modernly speaking: Epistles of Paul
Judah Himango
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Thnax for all the input peeps..I am going to try the Int32.TryParse..Btw, what is the best resource for knowing all in the classes and methods ( other than MSDN help )? I don't expect to know them all, but it would be good to have a good reference other than Google...
And Judah's reponse is for keytrokes that are between 0-9, correct?
Jude
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Ahhh..I am using 2003...Int32.TryParse i not available for 1.1, and 2003 doe not support 2.0 from what I know, Corret?
Jude
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Try this.
text box's KeyPress event
if ((int)e.KeyChar >= 48 & (int)e.KeyChar <= 57)
OR
in KeyDown or KeyUp event
if (e.KeyCode >= Keys.D0 & e.KeyCode <= Keys.D9)
this.Text = e.KeyValue.ToString();
Best of Luck.
_____________________________
Success is not something to wait for, its something to work for.
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hi
i want to print my datagrid records but it's more than one page . how to print it to multipage ?
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Hi,
I have a question related to passing an array to a method.
In C++, if I have an array Arr[] with 20 elements, and I want to pass the array to a method, but starts from the 10th element, then I would do the following:
AMethod(Arr + 10);
If I want to do the same thing in C#, what would be the proper way? Thanks a lot.
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Pass the offset and length. It is always a good practice.
A man said to the universe:
"Sir I exist!"
"However," replied the Universe, "The fact has not created in me A sense of obligation."
-- Stephen Crane
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Use the System.ArraySegment generic class.
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Friends,
In Winforms, the control gets highlighted when it has an input focus either by pressing TAB key or by clicking it with mouse. Now what i want is that my button control should not get highlighted when it has an input focus. How can i do so ? Is there any property ?
Imtiaz
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You can create such a button by setting the ControlStyles.Selectable value to false.
This is a sample of how to do it (#using directives omitted):
public class InertButton : Button
{
public InertButton()
{
SetStyle(ControlStyles.Selectable, false);
}
} That's it.
Regards,
mav
--
Black holes are the places where god divided by 0...
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i´m develop a local and remote application with sqlServer, the connection path where i´ve ip address, database, user and pass its on xml file, with two differents tags <local> and <remote>, and my question is, how its better, a class user with and attribute state , 0 local ,1 remote and when i use the class DataBase management if (i==0){read XML Local}else{read XML remote},or use a factory ?? and it i use a factory how can i do???
thanks for all
see you soon
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I need to write some decimals on magnetic medium.
A C# decimal is realized in memory as series of 16 bytes.
How can I, without unsafe mode, code the conversion from deciamal into such an array byte[] and backwards?
HilSoft
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If you use Reflector, you can see what the underlying implementation is for Decimal . For instance, there's an internal method called GetBytes that looks like this:
internal static void GetBytes(decimal d, byte[] buffer)
{
buffer[0] = (byte) d.lo;
buffer[1] = (byte) (d.lo >> 8);
buffer[2] = (byte) (d.lo >> 0x10);
buffer[3] = (byte) (d.lo >> 0x18);
buffer[4] = (byte) d.mid;
buffer[5] = (byte) (d.mid >> 8);
buffer[6] = (byte) (d.mid >> 0x10);
buffer[7] = (byte) (d.mid >> 0x18);
buffer[8] = (byte) d.hi;
buffer[9] = (byte) (d.hi >> 8);
buffer[10] = (byte) (d.hi >> 0x10);
buffer[11] = (byte) (d.hi >> 0x18);
buffer[12] = (byte) d.flags;
buffer[13] = (byte) (d.flags >> 8);
buffer[14] = (byte) (d.flags >> 0x10);
buffer[15] = (byte) (d.flags >> 0x18);
}
You could use reflection to call that internal method or you could use GetBits and convert the integers to bytes yourself. Here's what GetBits looks like:
public static int[] GetBits(decimal d)
{
return new int[] { d.lo, d.mid, d.hi, d.flags };
}
To convert the bits back into a Decimal , you can use the constructor that takes an int array. The array is in the same format that is output by GetBits .
Logifusion[^]
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I do not know what is Reflector,
and what the function .lo .mid and so on
My Visual Studio 2005 does not understand such kind of things.
But thank you, anyway. I'll try...
HilSoft
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Reflector is a tool that decompiles IL and shows the (approximate) source that was used to create it. lo, mid, etc are private members of the Decimal class.
http://www.aisto.com/roeder/dotnet/
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