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Re: Size of Color struct?

Luc Pattyn14-Mar-09 4:51

Luc Pattyn

14-Mar-09 4:51

So today we learned one drop of color paint is much bigger than one pixel.

Regards,

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Re: Size of Color struct?

Luc Pattyn14-Mar-09 4:48

Luc Pattyn

14-Mar-09 4:48

Hi,

Looking at it with both the Reflector tool and some reglection code, the conclusion seems to be Color struct occupies 24 bytes, holding:

string name; // either null or pointer to the name of one of many known colors such as "white"
long value;  // not sure why 64 bits are used
short knownColor;   // probably a way to map the color onto some system palette
short state;        // flags regarding IsEmpty, IsKnownColor, etc.

[CLARIFIED]
on Win64, there are 8+8+2+2 meaningful bytes, struct alignment rounds it up to 24 and all is fine;
on Win32, if they had chosen a different order of the fields, the 4+8+2+2 bytes would have fitted into 16 bytes of memory.
[/CLARIFIED]

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Re: Size of Color struct?

Xmen Real 14-Mar-09 5:48

Xmen Real

14-Mar-09 5:48

Luc Pattyn wrote:
string name; // either null or pointer to the name of one of many known colors such as "white"

why string if its pointer. Pointers are suppose to be IntPtr or long.

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Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-iTV.C\y<pjxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can

Re: Size of Color struct?

Luc Pattyn14-Mar-09 6:03

Luc Pattyn

14-Mar-09 6:03

Xmen wrote:
why string if its pointer. Pointers are suppose to be IntPtr or long.

On the functional level, it is a string. However strings are reference types, so what is actually sitting inside the struct and taking up some bytes, is just a 32 or 64-bit pointer/reference to the actual string. We ancients, with a pre-.NET background, call that a pointer.

When you need to pass a reference of something to the native world, the correct way is by using an IntPtr; a long would be wrong, and so would be an int. IntPtr adapts itself automatically to the Win32/Win64 situation at hand. Unfortunately the majority of P/Invoke examples on the web are still using int for passing pointers, and so they are plain wrong.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Re: Size of Color struct?

Xmen Real 14-Mar-09 6:10

Xmen Real

14-Mar-09 6:10

Luc Pattyn wrote:
so what is actually sitting inside the struct and taking up some bytes, is just a 32 or 64-bit pointer/reference to the actual string.

but struct is not holding string...its holding pointer numeric value. If I'm not wrong then string size is depend on character length ?

Re: Size of Color struct?

Luc Pattyn14-Mar-09 6:43

Luc Pattyn

14-Mar-09 6:43

The data (characters) of the string are not relevant here, the struct only has something that knows where the data is, call it a reference, a pointer, an indirection, or whatever you like; it needs 4 or 8 bytes to do that depending on the kind of Windows it is built for.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

How to load the right Interop Assembly in runtime ?

Yanshof14-Mar-09 2:34

Yanshof

14-Mar-09 2:34

I writing some application that have reference of Microsoft office outlook.
My application can work with office 2007 or office 2003.

When i work with office 2007 all work fine - and i don't have any problem to control the outlook.
But with office 2003 i cant control the outlook even if i install the interop assembly of office 2003.
I think that the problem is in the loading Interop assembly - because i compiled the setup file with office 2007.

Someone can help ?
I don't know how to solve this problem.

Gridview updation problem

muhammadafsal14-Mar-09 1:52

muhammadafsal

14-Mar-09 1:52

How to retrieve data from sqldatabase to gridview's top row.
now i can display data from databse to gridview,but i need to retreve last updated data from database to gridview's top row.

source code:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" Style="z-index: 120;
left: 59px; position: absolute; top: 457px" CellPadding="4" ForeColor="#333333" GridLines="None" Height="170px" Width="890px" AllowSorting="True" BorderWidth="2px" CellSpacing="5">
<Columns>
<asp:BoundField DataField="date" HeaderText="Date" InsertVisible="False" />
<asp:BoundField DataField="description" HeaderText="Description" />
<asp:HyperLinkField DataNavigateUrlFields="url" DataTextField="title" HeaderText="Click here to read more"
NavigateUrl="url" Target="_parent" />
<asp:BoundField DataField="country" HeaderText="Country" />
<asp:BoundField DataField="city" HeaderText="City" />
<asp:BoundField DataField="author" HeaderText="Author" />
</Columns>
<FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<RowStyle BackColor="#CCCCFF" ForeColor="#333333" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" />
<PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Center" />
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="White" />
</asp:GridView>

c# code:
protected void Page_Load(object sender, EventArgs e)
{

string m;
m = Request.QueryString["a"].ToString();

TextBox1.Text = m;

if (!IsPostBack)
show();

}
private void show()
{
adp = new SqlDataAdapter("select date ,title ,url ,description, author, city,country from postupdation ", con);
adp .Fill (ds);
GridView1.DataSource = ds;
GridView1.DataBind();
// GridView2.Visible = true;

}

can any one pls help me

Re: Gridview updation problem

Blue_Boy14-Mar-09 2:33

Blue_Boy

14-Mar-09 2:33

You are not enough clear in your question!What concretely you want to do with your data?

I Love T-SQL
"Don't torture yourself,let the life to do it for you."
If my post helps you kindly save my time by voting my post.

Idle processing in windows forms

saksp14-Mar-09 1:19

saksp

14-Mar-09 1:19

How to associate event handler with the Idle event in c#?

thanks

Re: Idle processing in windows forms

dataminers14-Mar-09 1:41

dataminers

14-Mar-09 1:41

public static event EventHandler Idle

private void Application_Idle(Object sender, EventArgs e)
{
MessageBox.Show("You are in the Application.Idle event.");
}

Re: Idle processing in windows forms

saksp14-Mar-09 2:19

saksp

14-Mar-09 2:19

I tried this. But with this how will it attach the Application_Idle to Applications Idle processing?

thanks

Re: Idle processing in windows forms

Luc Pattyn14-Mar-09 3:13

Luc Pattyn

14-Mar-09 3:13

saksp wrote:
How to associate event handler with the Idle event in c#?

?? why would it be different from any other event? try Application.Idle+=myIdleHandler;

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Re: Idle processing in windows forms

#realJSOP14-Mar-09 3:33

#realJSOP

14-Mar-09 3:33

Another example of trying different things in a test app. I swear, some of these guys really should reevaluate their current career path...

"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
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Re: Idle processing in windows forms

Luc Pattyn14-Mar-09 3:59

Luc Pattyn

14-Mar-09 3:59

Yep. Weekend programmers resemble weekend traffic. Quantity down, quality down. Big Grin | :-D

Luc Pattyn [Forum Guidelines] [My Articles]

button size srinks more in table layout panel

Maddie from Dartford14-Mar-09 0:40

Maddie from Dartford

14-Mar-09 0:40

Hello,
I am using table layout panel so my C# application UI looks better even if we change screen resolution. My all controls are docked fill in different cells of tableLayoutPanel. I am 1280 by 1024 resolution to develop UI.

If i change resolution to 800 by 600 then the size(height) of button reduces extremely and text also doesn't fit in button but the other controls like text box seems to be ok.

How do i make sure that the button size reduces according to the parent control and also button text should be visible?

Thanks in Advance.

Re: button size srinks more in table layout panel

fly90414-Mar-09 1:45

fly904

14-Mar-09 1:45

Find the height and width of the button at its smallest possibly size where the text is still visible. Then write a simple script saying that it can't be smaller.

hmmm pie

Re: button size srinks more in table layout panel

Navneet Hegde14-Mar-09 2:29

Navneet Hegde

14-Mar-09 2:29

Hi!

Design your layout in 800 by 600 resolution. and then move to 1280 by 1024

Thanks

Develop2Program & Program2Develop

Re: button size srinks more in table layout panel

Maddie from Dartford14-Mar-09 3:23

Maddie from Dartford

14-Mar-09 3:23

Thanks all.
Designing in lower resolution works for me.

A class without Main

Akash Chavhan14-Mar-09 0:03

Akash Chavhan

14-Mar-09 0:03

I want to create a Console Application in C#.NET 2.0

I am trying to create a class in C# that Prints an Output Hello but that class don't have Main()

I think this can be created by using keyword "static"

This is the CODE

using System;

class StaticTest
{
static void A()
{
Console.WriteLine("Hello!");

}
}

THANKS Laugh | :laugh:

Re: A class without Main

DaveyM6914-Mar-09 0:24

DaveyM69

14-Mar-09 0:24

One class in your project must have a Main. Main is the entry point into your application.
Any class with a Main can be the StartUp object.
The Main can return void or int.
It can either be parameterless or take a string array.

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)

Re: A class without Main

harold aptroot14-Mar-09 0:46

harold aptroot

14-Mar-09 0:46

You're still going to have to call A() from your Main though so what's the point of this?

besides, what is the question?

browser problem with visual studio 2005

maheshsahini13-Mar-09 20:02

maheshsahini

13-Mar-09 20:02

hello friends i'm new to this forum... i'm working on a website and using vs2005. the screen i designed on the vs2005 is different from the screen dat i view on the browser. i hv tried all the browsers like ie, firefox, opera nd chrome. bt the prblm still persists... m using windows vista, is dat the cause?? please help me.

Re: browser problem with visual studio 2005

Mycroft Holmes13-Mar-09 23:41

Mycroft Holmes

13-Mar-09 23:41

maheshsahini wrote:
is dat the cause

Don't know what dat is. You are going to supply some more details than "the srenn dat I view"

There are a bunch of developers on the forums, no psychics.

Never underestimate the power of human stupidity
RAH

Re: browser problem with visual studio 2005

maheshsahini14-Mar-09 0:07

maheshsahini

14-Mar-09 0:07

i added a menu bar and a tree view on the LHS of my page, which is visible in the master page and home page as well, bt wen i run the page on the browser they r not visible..

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