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hello,
i wrote an application in c# that starts automaticaly when computer starts.

i allready have code that prevents the application from running more than
once as follows:

static void Main()
        {
            Boolean firstInstance = false;
            string safeName = "xxx";
            Mutex mutex = new Mutex(true, safeName, out firstInstance);
            if (!firstInstance) return; 
        }

now when i publish a new version (i set the revision to increase
automaticaly) and run the setup file all is fine but the old application
still remains.
i get two copies running , one new and one old.
is there a way to tell the old version to close ? like an external event?

i am using only visual studio tools.

thanks in advance

avi

Hi!

Do you mean to say that during updated installation you SETUP should remove previous installation.

Thanks!

Develop2Program & Program2Develop

no no navneet hegde,
i ment that a previous program is still running,
now a new program needs to run instead of it so how will it end the
process of the previous program ? i dont want the old program and the new program to run but only the new one.

after the installation of the new program finishes , the old program closes and the new program takes it place..

i seen it done in famous apps , i wanna do it too...

thanks Smile | :)

Hi!

Your new Application starts.
In Main get the collection of all the running processes.
Iterating it you get your running process object.
Compare it's build with this process build.
If it's greater than kill the previous process and continue with this process.
Else kill this process.

Thanks!

Develop2Program & Program2Develop

ok , thanks i shall try that Smile | :)

Hello guys.

How much bytes does Color struct get ?

Thank you

Mohammad Dayyan wrote:
How much bytes does Color struct get ?

what for? static data? instance data? IL code? native code?

each Color instance is a struct which only offers four 8-bit components (A, R, G, B), so 32-bit seems the obvious answer. You can measure that yourself.

ADDED: see correction in another message [/ADDED]

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

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modified on Saturday, March 14, 2009 10:42 AM

I've got it, thanks Thumbs Up | :thumbsup:

You're welcome.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

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The important point here is that it would have taken just one line of code to find that out on his own. I have a winform app standing by specifically to test things and discover stuff just like this.

"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

I've never needed to do this on Color so I gave it a try.

Console.WriteLine(sizeof(Color)); interestingly produces the following error:
'System.Drawing.Color' does not have a predefined size, therefore sizeof can only be used in an unsafe context.

Console.WriteLine(System.Runtime.InteropServices.Marshal.SizeOf(typeof(Color))); returns 24.

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)

Are you running a 64-bit Windows version?

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

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No, that was Vista 32bit.

[Edit] Same results on Weven 32 bit [/Edit]

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)

modified on Saturday, March 14, 2009 11:50 AM

Just seen your clarification below - cool and fived Cool | :cool:

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)

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

Regards,

Luc Pattyn [Forum Guidelines] [My Articles]

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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]

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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.

TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87֦ʻ6ϣN8ȤBcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-iTV.C\y<pjxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can

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]

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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 ?

TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87֦ʻ6ϣN8ȤBcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-iTV.C\y<pjxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can

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]

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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.

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

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.

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

thanks

public static event EventHandler Idle

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