C# Discussion Boards - CodeProject

Re: How to generate Random dates in C#.net

Michael Potter8-Aug-07 4:44

8-Aug-07 4:44

1) Calculate the number of days between MIN & MAX.
2) Get random number within that range.
3) Add the random number to MIN.

TimeSpan ts = DateTime.Parse("12/31/2006") - DateTime.Parse("1/1/2006");
Random r = new Random();
int randomDays = r.Next(ts.Days + 1);
DateTime randomDate = DateTime.Parse("1/1/2006").AddDays(randomDays);
MessageBox.Show(randomDate.ToShortDateString());

How can I load a chm file in a form?

Zahrashahla8-Aug-07 2:51

Zahrashahla

8-Aug-07 2:51

It means that when user press F1, help of the application will load in a special form. How can I do this?

Pls help!

Re: How can I load a chm file in a form?

sakthi dasan8-Aug-07 3:52

sakthi dasan

8-Aug-07 3:52

Hi
You just use c# namespace
using System.Runtime.InteropServices;

Process.Start("Test.Chm")

so you can call anykind file using the above code and also connect to internet use these code

Sak
Smile | :)

Re: How can I load a chm file in a form?

Zahrashahla8-Aug-07 4:05

Zahrashahla

8-Aug-07 4:05

Thanks Sak,

What is the Process is?

Re: How can I load a chm file in a form?

PIEBALDconsult8-Aug-07 5:40

PIEBALDconsult

8-Aug-07 5:40

See System.Windows.Forms.Help.ShowHelp

Smart Part and User controls

umashankergr88-Aug-07 2:40

umashankergr8

8-Aug-07 2:40

Hi All,

I have a smart part views which is calling a user control named "A". I want to call a another user control named "B" from previously loaded user control "A". Is that possible or otherwise i have to change the user control "A" to a smart view.

Please anyone help me in this, if possible with a sample code...

Thanks in advance,

Uma Shanker.K

Listview ploblem?

abcomp018-Aug-07 2:35

abcomp01

8-Aug-07 2:35

when i double click in listview i want to do something i have 4 item i listview
but how i get item line 1 is id? line2 id? but idont know to use method
if (listview1.???????? = =1) { do somthing }

srry i begin Blush | :O

Re: Listview ploblem?

Hessam Jalali8-Aug-07 3:14

Hessam Jalali

8-Aug-07 3:14

you can use listView.Items[...] property generally
in double click

and ListView.SelectedItems[...] Property or List.View.SelectedIndices[...] which the first one returns the selected ListViewItem and another one returns the index of the selected ListViewItem

and if you do not use multi selection you can simply access to the selected Item like

ListView.SelectedItem[0]

<br />
<br />
        void listView1_DoubleClick(object sender, EventArgs e)<br />
        {<br />
            MessageBox.Show((sender as ListView).SelectedItems[0].Text);<br />
        }<br />

good luck

Re: Listview ploblem?

abcomp018-Aug-07 3:41

abcomp01

8-Aug-07 3:41

can show id in listbox?

Re: Listview ploblem?

Hessam Jalali8-Aug-07 4:00

Hessam Jalali

8-Aug-07 4:00

can you give some hints about what exactly you mean about id?

Using the ListBox is very similar except it has too more ListBox.SelectedItem and ListBox.SelectedIndex Properties and another difference is it will return an object which must be casted to what you put inside for using it after retrieving from the list

and about showing things in ListBox

when you add something in listbox it simply use your object's ToString method for showing that in the list So all things you want to show from your class in the listBox must be set into overridden version of ToString method so it can show that.

Hope this one helps

mouse posistion on a control when drag and dropped onto

racing578-Aug-07 2:34

racing57

8-Aug-07 2:34

As title really, i have an app with the ability to drag an item from a list box onto another grid type control, i can drag and drop no problem, i can also get the x,y coords of the mouse within the control when not dragging, but i need to get them when i have dropped the item onto the grid control. the problem is, the coords i am getting are not the withing the control but the screen ( i think ) any ideas how i can covert to the controls coords or how to get the coords from the control ??

Thanks in advance

Lee

Re: mouse posistion on a control when drag and dropped onto

JoeSharp8-Aug-07 2:41

JoeSharp

8-Aug-07 2:41

hi
Point point = MyControl.ScreenToPoint(new Point(e.X, e.Y));

regards

Re: mouse posistion on a control when drag and dropped onto

racing578-Aug-07 2:44

racing57

8-Aug-07 2:44

i cannot see a function ScreenToPoint i have PointToScreen and PointToClient but not the otherway round ?? am i missing something here ??

Thanks

Re: mouse posistion on a control when drag and dropped onto

Luc Pattyn8-Aug-07 2:49

Luc Pattyn

8-Aug-07 2:49

you want PointToClient

Smile | :)

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Re: mouse posistion on a control when drag and dropped onto

racing578-Aug-07 2:51

racing57

8-Aug-07 2:51

thanks, i finally sussed it after reading the first response... i just used

Point pt = Control.PointToClient( new Point( e.X,e.Y ) );

Thanks for the responses..

Big Grin | :-D

Is there is some feature in C# that will act like #Define in C++ ???

Yanshof8-Aug-07 2:16

Yanshof

8-Aug-07 2:16

Hi All,

I have some block that occur in my catch ( try...catch ), this block is repeats a lot of time ( with different message but beside this message all the rest are the same ).

In C++ i would replace this block with some #define - but in C# i cant use ( of course ) this define.

My question is is there is something else that i can use to save line code in my project ?
Can i use something else beside writing all those 4 line in the block again and again and .... again....

I know that i can write some method and call it all the time - but i looking some other way.

Thanks for any help

Re: Is there is some feature in C# that will act like #Define in C++ ???

Luc Pattyn8-Aug-07 2:29

Luc Pattyn

8-Aug-07 2:29

No there is not.

"#define IDENTIFIER" is available for conditional stuff, there is no DEFINE
for code substitution.

go with the method !

And if you want to show the exception, show it in its entirity, that is
with ToString(), everything else sucks.

What's in those four lines anyway ?

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Re: Is there is some feature in C# that will act like #Define in C++ ???

Colin Angus Mackay8-Aug-07 2:30

Colin Angus Mackay

8-Aug-07 2:30

Yanshof wrote:
I know that i can write some method and call it all the time

Well, why not?

Yanshof wrote:
but i looking some other way

Why? What advantage do you think you will get?

Upcoming events:
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"I wouldn't say boo to a goose. I'm not a coward, I just realise that it would be largely pointless."

My website

Re: Is there is some feature in C# that will act like #Define in C++ ???

Dan Neely8-Aug-07 3:43

Dan Neely

8-Aug-07 3:43

Colin Angus Mackay wrote:
Why? What advantage do you think you will get?

#define in C/C++ is a code obfuscater. Obfuscated code is job security. Roll eyes | :rolleyes:

--
You have to explain to them [VB coders] what you mean by "typed". their first response is likely to be something like, "Of course my code is typed. Do you think i magically project it onto the screen with the power of my mind?" --- John Simmons / outlaw programmer

Re: Is there is some feature in C# that will act like #Define in C++ ???

User 66588-Aug-07 2:35

User 6658

8-Aug-07 2:35

You can use #if, #else if #else inside the code, and you can #define some constants either at the very beginning of the file or in the project properties

regards

modified 12-Sep-18 21:01pm.

Re: Is there is some feature in C# that will act like #Define in C++ ???

PIEBALDconsult8-Aug-07 5:48

PIEBALDconsult

8-Aug-07 5:48

Use a method and/or derive your own type of Exception.

On the other hand... The "C preprocessor" can be used with any type of text file, not just C/C++ source files. I do use it with C#, but only to prove the point.

Problem- Server Busy...Switch/Retry

Iftekhar Naim8-Aug-07 2:04

Iftekhar Naim

8-Aug-07 2:04

Hi All,

I am developing an application where a vehicle's route will be tracked by Microsoft MapPoint. Recently, it gives me an error message box - "Server Busy" and it has 2 option buttons "Switch to" and "Retry".

I have searched in Google and they say that it occurs when - the COM object(here MSMapControl) is not responding within a time period. They all suggest to set

"app.OleRequestPendingTimeout" to a higher value. But this is in Visual Basic and this object is not supported in C#.

Can anyone tell me how can i do this in C# ?

Thanks

Chayan

Reflection, Invoking Methods

glFrustum8-Aug-07 2:01

glFrustum

8-Aug-07 2:01

Hi everyone,

I'm looking for a nicer way to invoke methods. The following code is called by:
Fetch(someObject, "GetCustomer", 1).

The ugly thing about this is that the name of the method is passed as a string. Is there a way to support something like:
Fetch(someObject.GetCustomer, 1)?

I tried to use generic delegates, but had trouble with params object[] args as parameter and with the encapsulation inside the Fetch method... Confused | :confused:

Thanks in advance
glFrustum

<br />
public object Fetch(object target, string methodName, params object[] args)<br />
{<br />
    return target.GetType().InvokeMember(<br />
        methodName, BindingFlags.InvokeMethod, <br />
        null, target, args);<br />
}<br />

Re: Reflection, Invoking Methods

kubben8-Aug-07 2:27

kubben

8-Aug-07 2:27

Here is a new article that someone just posted on this subject:
http://www.codeproject.com/useritems/CallMethodNameInString.asp[^]

Hope that helps.
Ben

Re: Reflection, Invoking Methods

glFrustum8-Aug-07 3:08

glFrustum

8-Aug-07 3:08

Thanks, but this article describes what I'm trying to avoid Smile | :)

(Passing methods as string)

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