Re: Reminder Project - C# Discussion Boards

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Re: barcode algorithm

DanB19833-Oct-07 9:09

DanB1983

3-Oct-07 9:09

As far as i am aware the barcode reader just reads a string much like you could put 12345678 into a keyboard. Its upto you how you query your datastore to match products etc

Dan

Reminder Project

MumbleB3-Oct-07 7:57

MumbleB

3-Oct-07 7:57

Hi Guys. I need a little advice. I am attempting to write a little reminder for my girlfriend. I orriginaly tried storing the details in a .mdf which worked OK for storing but then I couldn't figure out how to check if the reminder date and time == DateTime.Now. I was then advised here to try using XML which I then tried, considering I didn't know much about XML. This worked fine and the only problem i had with thsi was that when the reminder date and time == DateTime.Now it like opped up 60 message boxes, one for every tick on the timer. I would like to know how I can get it to only pop up one message box or advice on the best way to do this. Thanks in advance.

Re: Reminder Project

kubben3-Oct-07 8:15

kubben

3-Oct-07 8:15

You probably need another varible. Something like

bool sentReminder = false;
if (time == datetime.now && !sendreminder)
{
  sentReminder = true;
//do your thing
}

if (time != datetime.now)
{
  //re-set for next time
  sentReminder = false;
}

Anyway, that is one quick thought on what you could do.

Ben

Re: Reminder Project [modified]

Adam.m.Nelson3-Oct-07 8:24

Adam.m.Nelson

3-Oct-07 8:24

I'm sure there are better ways, but this would work.

//Declarations
int intFlag = 0;

//On timer tick
if ((date and time == DateTime.Now) && (intFlag == 0))
{
    intFlag++;
    Show reminder;    
}

if (date and time != DateTime.Now)
{
     intFlag = 0;
}

-- modified at 16:25 Wednesday 3rd October, 2007

Re: Reminder Project

MumbleB3-Oct-07 9:01

MumbleB

3-Oct-07 9:01

Thanx mate. I will give this a go. Much appreciated.

Re: Reminder Project

Adam.m.Nelson3-Oct-07 9:52

Adam.m.Nelson

3-Oct-07 9:52

np.. good luck

Re: Reminder Project

MumbleB3-Oct-07 20:24

MumbleB

3-Oct-07 20:24

Adam, last question. The exmple you provided, is that for using with SQL or with XML? I'm a bit lost at which base to use for storing the information in.

Re: Reminder Project

Adam.m.Nelson4-Oct-07 2:36

Adam.m.Nelson

4-Oct-07 2:36

That was for C#, which i am assuming you are writing your GUI in. The code was just a logic loop so it will only post your reminder once.

I don't personally know XML, but SQL is a great program to store information. There's an excellent article on here about SQL by Matt Newman, it might be useful for your project.

http://www.codeproject.com/cs/database/sql_in_csharp.asp

Oh, and the "data and time" in there would be a string in your app... if your using SQL you may have to use the .TrimEnd( ) Command to get rid of extra spaces at the end of the saved "date and time" to make it work right as SQL fills any un-used room with spaces for you.

I hope that answered your question, if not just message back.

Adam

--Its not broken if it never worked.

Creating own DLL for use with DllImport [modified]

Kristian Sixhøj3-Oct-07 7:43

Kristian Sixhøj

3-Oct-07 7:43

I have created a DLL called uptimelib.dll, which
has one function:

public static string GetUptime()
{
    double secs, mins, hours, days, hours2, mins2, secs2;
    double ticks = Environment.TickCount;
    secs = Math.Floor(ticks / 1000);
    mins = Math.Floor(secs / 60);
    hours = Math.Floor(mins / 60);
    days = Math.Floor(hours / 24);
    hours2 = hours - (days * 24);
    mins2 = mins - (hours * 60);
    secs2 = secs - (mins * 60);

    return days + "days, " + hours2 + "hours, " + mins2 + "minutes, " + secs2 + "seconds";
}

The problem is, I want to be able to use this function in other projects, just by importing the dll using DllImport(). Therefore, I have put uptimelib.dll in System32 folder, and imported it into my project:

[DllImport("uptimelib.dll")]
public static extern string GetUptime();

But whenever I try to use the function, it throws an exception saying "Uptimelib.dll does not contain an entry point named GetUptime()". I have checked that everything is spelled correctly, and so on.

How do I fix it?

Thanks in advance.

-- modified at 14:18 Wednesday 3rd October, 2007

Virtual1ty

"Any fool can learn from his own mistakes, but a wise man learns from mistakes of others"

Re: Creating own DLL for use with DllImport

Anthony Mushrow3-Oct-07 12:58

Anthony Mushrow

3-Oct-07 12:58

Incase you didn't know, you can also just add a reference to the DLL, so you don't need to use DLLImport. Then you use the function as though it was with the rest of your source code.

To add a reference, right click the folder 'references' in you project view-thing and click add reference, look for a button that says browse or similar. I use sharpdevelop so if your using something else, its probably slighty different.

As for using DLLImport on your own dll's i have no idea, sorry.

Re: Creating own DLL for use with DllImport

Kristian Sixhøj4-Oct-07 4:47

Kristian Sixhøj

4-Oct-07 4:47

Yes, I knew that, but I still want this to work as well. Smile | :)

Virtual1ty

"Any fool can learn from his own mistakes, but a wise man learns from mistakes of others"

How do you set the Selected Item in a DataGridViewComboBoxColumn cell? [modified]

Adam.m.Nelson3-Oct-07 7:41

Adam.m.Nelson

3-Oct-07 7:41

Hello,

I am having an issue with the datagridview in C#. I have set-up the data grid view table, and am trying to set the Selected Item in a "DataGridViewComboBoxColumn" cell. I need to be able to set the selected Item manually as part of a load command (Which retreives information from a remote server). The Items list is populated from a Data Source, which works.

I can load the information into a "DataGridViewTextBoxColumn" cell but not a "DataGridViewComboBoxColumn " cell.
Does anyone know how to set the Selected Item in a DataGridViewComboBoxColumn cell?

Any thoughts would be appreciated.

Thanks,
Adam

-- modified at 13:56 Wednesday 3rd October, 2007

Bound datagridvewview column ordering confusion

Matthew Cuba3-Oct-07 7:39

Matthew Cuba

3-Oct-07 7:39

Hello,

So, I've got a DataGridView that is bound to some data in a DataTable. I only show a subset of the columns and additionally have two non-bound columns in the DataGridView.

I've attempted to set the column ordering via the DisplayIndex property to no avail.

If I attempt to set the DisplayIndex for each in ascending order such as:

column0.DisplayIndex = 0;
column1.DisplayIndex = 1;
.
.
.
column9.DisplayIndex = 9;

the columns don't order correctly. They end up showing up as follows (numbers are the order that I specified them in):

0, 1, 2, 6, 8, 4, 7, 3, 9, 5

The two non-bound columns are 6 and 8 and are DataGridViewImagaColumns. The others are text columns.

Has anyone else had such a problem and solved it? I saw some similar questions asked in my google searching but didn't see a solution to this. I wonder if it is a bug or perhaps I'm just missing something here.

Thanks for you help,
Matt

TODO: Think up something witty to put here.

Re: Bound datagridvewview column ordering confusion

Adam.m.Nelson3-Oct-07 8:03

Adam.m.Nelson

3-Oct-07 8:03

Hey,

I don't know if there is a reason your changing the order via the DisplayIndex, or what your using to write your code, but if you right click on the datagridview and go edit columns, then you can change the order by moving them up and down in the list(In Visual Studio .NET 2005).

Hope that helps, if not disregard.

bindingNavigatorDeleteItem_Click

bluegrassman3-Oct-07 7:11

bluegrassman

3-Oct-07 7:11

I am using SQL Server 2005, C#.net 2005, I'm new at this and can't figure out or find information on how to delete a record.

bluegrassman

MDI

sajid.salim.khan3-Oct-07 6:51

sajid.salim.khan

3-Oct-07 6:51

Problem

Problem is about resizing of controls on the similar project disussed above if i place a group box on the child form and put some controls when i run it the controls are adjusted as i placed and there is lot of space empty on the child form how should it be done that when i open the child form the control should be resized according to the maximize button and according to the size of the parent

SAS

sas

C# howto CyclePort Usb device ?

etaofodete3-Oct-07 6:23

etaofodete

3-Oct-07 6:23

Hello all ,

C# 2005
Hardware Pic18F4550 Usb controller working as an HID device
Usb device with Bootloader and main software.
VID & PID are not change.

problem :

each time that I update the soft of my USB device ,I need to unplug - plug de device manually so it can work after.

idea:
CyclePort (disconnect & reconnect) via software my device after
an update.

I have also find info on re-enumerate device but not certain on that.

Solution:

?????

thank you in advance for your help

Etao

Re: C# howto CyclePort Usb device ?

VirtualVoid.NET3-Oct-07 23:42

VirtualVoid.NET

3-Oct-07 23:42

have you looked at this? http://www.icsharpcode.net/opensource/sharpusblib/

V^irtualV^oid.NET

Saving an self painted image from a pictureBox

MyPiano3-Oct-07 6:08

MyPiano

3-Oct-07 6:08

Hello,

I'm programming a little music helper and use the System.Drawing class, to draw the staves and notes on a PictureBox. I want to save that as Image, but all my attempts failed. Of course I used Google to find the answer and I found a advice. It says that I have to draw my things on a Bitmap first and save that. But How do I draw something on a Bitmap with Graphics?

I'm looking forward to your answers.

Best regards

MyPiano(Joris)

edit: Sorry for my English. It isn't my mother-tongue.

Re: Saving an self painted image from a pictureBox

Ajay.k_Singh3-Oct-07 7:02

Ajay.k_Singh

3-Oct-07 7:02

Drawing anything in a Bitmap using a Graphics object is very easy. You will need to first create one bitmap object and use it for initializing graphics object.

Once you get one graphics object created using FromImage method, you may draw anything in this graphics object and it will be drawn on bitmap also.

At last you may save the bitmap using Save method of bitmap object.

Such as-

----------Start Code----------------

Bitmap a = new Bitmap(400, 300);

Graphics g = Graphics.FromImage(a);

g.DrawLine(Pens.AliceBlue, 0, 0, 100, 100);

a.Save(“C:\MyFile.jpg”);

--------------End Code--------------

I hope this helps Smile | :)

.

-Dave.

Dave Traister,
ComponentOne LLC.
www.componentone.com

Re: Saving an self painted image from a pictureBox

MyPiano5-Oct-07 2:58

MyPiano

5-Oct-07 2:58

Hey Dave,

Thanks for your help. It works great now! Smile | :)

Best regards

Joris

Default script in dot net is?

GunaChinna3-Oct-07 5:09

GunaChinna

3-Oct-07 5:09

Hi which is the default script used in dot net?

Re: Default script in dot net is?

Pete O'Hanlon3-Oct-07 5:19

Pete O'Hanlon

3-Oct-07 5:19

If you mean to ask which is the default development language in .NET, then there isn't one. Out of the box, you can develop in C# or VB.NET (the compilers are included with the .NET runtime) and you can download/choose other languages as you see fit.

Deja View - the feeling that you've seen this post before.

Re: Default script in dot net is?

DotNetXenon3-Oct-07 8:24

DotNetXenon

3-Oct-07 8:24