Re: Reminder Project - C# Discussion Boards

anuradha.rrao3-Oct-07 22:44

anuradha.rrao

3-Oct-07 22:44

Thanks Paul, I tried what you said, but the problem was that in a CompareValidator I needed to mention the Control to compare as well as the control to be compared. So I looked out for another option. What I did was i added the following code on page load:
DropDownList1.SelectedItem.Value="";
This nullifies the 0 th row value of the drop down list and allows the req field validator to work.

So assume a custom validator is not req..What say?

Regards,
Anuradha

pmarfleet3-Oct-07 22:53

pmarfleet

3-Oct-07 22:53

Set the ValueToCompare property of your CompareValidator control and not the ControlToCompare property. This will allow you to compare the value of your input control against a literal value.

Paul Marfleet

Pete O'Hanlon3-Oct-07 22:24

Pete O'Hanlon

3-Oct-07 22:24

As Paul said, you can use a Compare validator or, alternatively, you could use a CustomValidator as well.

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

anuradha.rrao3-Oct-07 22:47

anuradha.rrao

3-Oct-07 22:47

Thanx Pete...

barcode algorithm

memaia3-Oct-07 8:49

memaia

3-Oct-07 8:49

any one can tell me the algorithm of barcode algorithm
Rose | [Rose]

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 [modified]

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

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

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

MumbleB3-Oct-07 9:01

MumbleB

3-Oct-07 9:01

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

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

3-Oct-07 9:52

np.. good luck

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.

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

Creating own DLL for use with DllImport [modified]

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.

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

Bound datagridvewview column ordering confusion

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

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