C# Discussion Boards - CodeProject

How do I remove the default support URL from my custom EventLog entry?

23-Dec-09 1:22

In your C# app, do something like this:

public partial class MyForm
{
    private VBFormProject.VBForm m_vbForm = null;

    private void clickHandler(object sender, EventArgs e)
    {
        if (m_vbForm == null)
        {
            m_vbForm = new VBFormProject.VBForm();
        }
        // call show to make the form modeless
        m_vbForm.Show();
        m_vbForm.Fnc_ChangeText("some text");
    }

    private void OnClosing()
    {
        if (m_vbForm != null)
        {
            m_vbForm.Close();
        }
    }
}

.45 ACP - because shooting twice is just silly
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"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
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"The staggering layers of obscenity in your statement make it a work of art on so many levels." - J. Jystad, 2001

MatthysDT22-Dec-09 22:49

MatthysDT

22-Dec-09 22:49

Every EventLog entry my application makes ends with the following string:

"For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp."

I know there is a way of removing or replacing this, I just can't seem to find it! Roll eyes | :rolleyes:

Regards!

Doggy treat[^]

Polynomial finder

frommi22-Dec-09 22:33

frommi

22-Dec-09 22:33

Hi, someone knows a program to calculate the polynomial for CRC value?
I have the string example "100140590201004d000b00014b2b877053b17ee9100305ee5a" and the, i think, CRC value "7579d418" but i don't know the CRC polynomial.
I wait for suggestions.
Best regards and merry Christmas.
Andrea

Re: Polynomial finder

OriginalGriff22-Dec-09 23:11

OriginalGriff

22-Dec-09 23:11

CRC polynomial[^]

All those who believe in psycho kinesis, raise my hand.

Font and Size setting in Datagridview

M Riaz Bashir22-Dec-09 21:54

M Riaz Bashir

22-Dec-09 21:54

Hi,

kindly let me know that, how may I change following datagridview font and size setting? coz, following commands are not working:

dataGridView1.Font.Name = "Vardana";
dataGridView1.Font.Size = 10;

thank you in advance
(Riaz)

Re: Font and Size setting in Datagridview

MatthysDT22-Dec-09 23:27

MatthysDT

22-Dec-09 23:27

You cannot modify the font's type since it is ReadOnly, you should replace it with a new font.

A simple way to change the Font:

dataGridView1.Font = new Font(FontFamily.GenericSansSerif, 10, FontStyle.Regular);

If you MUST use Verdana, you need to get a reference to it's FontFamily first, this is a little more code:

//First get the array of FontFamilies
FontFamily[] ff = System.Drawing.FontFamily.Families;

//Next loop through the font families to find Verdana
FontFamily myFF = null;
foreach (FontFamily f in ff) {
	if (f.Name == "Verdana") {
		myFF = f;
		break;

	}
}

//Now set your DataGridView's Font:
dataGridView1.Font = new Font(myFF, 10, FontStyle.Regular);

PS. I believe there are better ways to get to the FontFamily, perhaps using LINQ, anyone here may improve on this.

Merry Christmas

Doggy treat[^]

Access Kernel-Mode dll

AB_dev22-Dec-09 21:45

AB_dev

22-Dec-09 21:45

Hi,

we build a kernel mode dll which we want to access via C#! The kernel mode dll is called "sample.sys" and is an export driver. I tried to access the export (functions) with the dllimport statement from C#.

[DllImport("Sample.sys",
            CharSet = CharSet.Auto,
            CallingConvention = CallingConvention.Winapi)]
        public static extern uint FindAll();

The definition from the dll and the function in the testing project ("FindAll") are the same. I also tried with the complete path to the export driver. The "Sample.sys" is located in the running directory of the C# testing assembly.

I always get a AccessViolationException ("attempt to read or write protected memory")

Does anybody know how to access this functions from C#?

Re: Access Kernel-Mode dll

Roger Wright22-Dec-09 22:09

Roger Wright

22-Dec-09 22:09

This may be so obvious as to be a dumb question, but are you running this test under an Administrator or System account? Kernel mode functions, and the memory they use, are carefully protected from users, for good reason.

"A Journey of a Thousand Rest Stops Begins with a Single Movement"

Re: Access Kernel-Mode dll

AB_dev22-Dec-09 22:15

AB_dev

22-Dec-09 22:15

I run it as local Administrator

no rounds

Kenny Chen22-Dec-09 21:40

Kenny Chen

22-Dec-09 21:40

i hv problems below:
a = 123456.789
b = 7
c = a/b --> the result is 17636.6841

but i want it shows 17636 (not rounding to 17637)

can anyone helps???

thx,
cool-a

Re: no rounds

#realJSOP23-Dec-09 1:25

Checkbox & CheckedChanged event... really?

23-Dec-09 1:25

There are a lot of solutions to your problem, but you didn't tell us whether or not you're displaying the number, or merely want to omit the fractional part from further calculations. Assuming you just want to display, it, do it this way:

string cString = Convert.ToInt32(c).ToString();

If you want to change the actual value, you can use Math.Floor, or even Convert.ToInt32 (I think).

Re: no rounds

Jordon4Kraftd23-Dec-09 14:09

Jordon4Kraftd

23-Dec-09 14:09

Review the "Math" library. There is a "Floor" and "Ceiling" function. Ceiling rounds 1.1 to 2 and Floor makes 1.9 to 1.

You will need to make sure a and b are "double" but will be fine.

double a = 123456.789;
double b = 7;
double c = Math.Floor(a/b);

Re: no rounds

Kenny Chen23-Dec-09 15:37

Kenny Chen

23-Dec-09 15:37

thx all... it helps me lot

BDJones22-Dec-09 15:00

22-Dec-09 15:00

When the CheckedChanged event fires, why does e not have a property with the current state? A CheckedListbox does...

Am I missing something here?

private void checkedListBox1_ItemCheck(object sender, ItemCheckEventArgs e)...
>>e has 'currentValue' and 'newValue'<<

private void checkBox1_CheckedChanged(object sender, EventArgs e)...
>>e has doesn't<<

Do I really have to go get the state from the checkbox when I'm already in the state event fired by that checkbox?

(checkBox1 == true)

That seems redundant. Thanks.

Luc Pattyn22-Dec-09 16:22

Luc Pattyn

22-Dec-09 16:22

BDJones wrote:
Do I really have to go get the state from the checkbox

yes

BDJones wrote:
if (checkBox1 == true) ...

no

if (checkBox1.Checked) ...

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

BDJones23-Dec-09 5:33

23-Dec-09 5:33

OK, thanks.

J4amieC22-Dec-09 22:38

J4amieC

22-Dec-09 22:38

The reason the checkedlistbox passes the state is because there are any number of individual checkboxes which may be checked/unchecked. A single checkbox is passed to you in the event

private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
   CheckBox chkBox = (CheckBox)sender;
   if(chkBox.Checked) ...
}

BDJones23-Dec-09 5:32

23-Dec-09 5:32

Thank you.

BDJones23-Dec-09 6:25

Add Object to RichTextBox

23-Dec-09 6:25

Would you mind educating me a little more...

What exactly is happening here? (Checkbox)sender;

Is this casting sender as a Checkbox?

dataminers22-Dec-09 14:04

dataminers

22-Dec-09 14:04

How can I add DLL file to RichTextBox ?

Re: Add Object to RichTextBox

Eddy Vluggen22-Dec-09 14:36

Eddy Vluggen

22-Dec-09 14:36

dataminers wrote:
How can I add DLL file to RichTextBox ?

Que? Like an OLE-object or what? Do you want to call methods in it during the viewing of the RTF, or should it represent data in the same way that you embed a wave-file?

I are Troll Suspicious | :suss:

Visual Studio doesn't detect invalid parameter type errors?

Xargo22-Dec-09 13:07

Xargo

22-Dec-09 13:07

I've been working with Visual Studio as hobbyist for a few years, but I only discovered this today. The way I found out was by moving some methods to another class. One of the methods used a Point class (of the System.Drawing namespace), but I didn't add a using-directive for that namespace. Then when I wanted to pass an instance of the Point class to that method from another class (which did have the directive to System.Drawing), it told me I was passing the wrong type.

That's when I discovered I forgot the using-directive to System.Drawing in the codefile of the method that also used the Point class. However, Visual Studio never warned me for that. Although the type I defined for that parameter was completely non-existing, it didn't mark it. Even if I said the parameter should be of type "sldhfsdf", which didn't exist at all (no directive to a potential namespace could have solved that), it still didn't mention anything, and acted as if it was an existing type. I could even use the parameter in the method, and it would propose it in the IntelliSense list.

Only I try to compile, it does return an error.

To clarify, here's an example that seems to be alright to Visual Studio's error checking.

public class Test
{
    public void MyMethod(abcabc var1)
    {
        var1 = null;
    }
}

While writing this piece of code, Visual Studio won't tell me this is wrong. The only way to find out is by compiling, or calling the method somewhere so it would tell me I'm either passing an unexisting or invalid variable.

Both Visual Studio 2008 and 2005 seem to do this. Could anyone explain me why this is the case?

Re: Visual Studio doesn't detect invalid parameter type errors?

#realJSOP23-Dec-09 1:30

Re: Visual Studio doesn't detect invalid parameter type errors?

23-Dec-09 1:30

I think you have to tell intellisense to check parameters.

Xargo23-Dec-09 3:50

Xargo

23-Dec-09 3:50

How do I do this? I've been searching for it on the internet, but can't find it. The Intellisense options seem rather limited.

Re: Visual Studio doesn't detect invalid parameter type errors?

#realJSOP23-Dec-09 9:16