Re: How to Create Login in C# - C# Discussion Boards

somagunasekaran11-May-08 18:50

11-May-08 18:50

No...

when i select the Start date and Automatically End date will add 2 years plus 1 day...So how to do??????

For example i give a start Date default date(whatever Date)is 12/05/2008 and End date will add 13/05/2010...automatically End Date will add 2years plus 1 day... OMG | :OMG:

Regards

Somasundaram gunasekaran

Re: Hi DatetimePicker control

Abhijit Jana11-May-08 19:06

Abhijit Jana

11-May-08 19:06

just try this....

DataTime Dt;

try to use these methods.......

Dt.AddYear()<br />
Dt.AddDay()

Best Regards
-----------------
Abhijit Jana
"Success is Journey it's not a destination"

Re: Hi DatetimePicker control

somagunasekaran12-May-08 1:53

somagunasekaran

12-May-08 1:53

Please i need some examples of Datetimepicker control Source code...

pls reply...

Regards
Somasundaram

I want to join in the website

c# can not load a c++ DLL

sharp_k11-May-08 16:43

sharp_k

11-May-08 16:43

I followed a tutorial, created a basic DLL and created a sum function which returns the sum of two integers. The code compiles fine and DLL is created. However when i use it in c# and load it as reference, it give me error. It says 'reference can not be added. Make sure the file is accessible and a valid com object'. What could be the problem?

Thanks

Re: c# can not load a c++ DLL

Christian Graus11-May-08 17:06

Christian Graus

11-May-08 17:06

The problem is that you can only reference COM and .NET DLLs in .NET. You can, however, use p/invoke to link to and call methods in a plain vanilla dll, like the one you created.

Christian Graus

Please read this if you don't understand the answer I've given you

"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

Re: c# can not load a c++ DLL

sharp_k11-May-08 18:25

sharp_k

11-May-08 18:25

I greatly appreciate it. Thanks

[Message Deleted]

mary okon11-May-08 13:29

mary okon

11-May-08 13:29

[Message Deleted]

Re: How to Create Login in C#

Christian Graus11-May-08 14:32

Christian Graus

11-May-08 14:32

I recommend buying a beginners book on C# and winforms to help you through hurdles at this level.

You just have textboxes for the user name and password, use code to check if they are correct, and then either ask again or continue, depending on if they enter the right value or not.

Morons

Christian Graus11-May-08 16:40

Christian Graus

11-May-08 16:40

I really wonder why I bother helping people when they respond by giving me a 1 and deleting their post. The question was basically asking how to check if two strings were equal and do an if statement. You tell me if I deserve a one for saying this person needs a book.

Re: Morons

Mark Salsbery11-May-08 16:52

Mark Salsbery

11-May-08 16:52

Christian Graus wrote:
You tell me if I deserve a one for saying this person needs a book.

Nah. Definitely worthy of a 2 or 2.5 Smile | :)

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Morons

Christian Graus11-May-08 17:06

Christian Graus

11-May-08 17:06

LOL - thing is, I answered her only other question ever and told her then she needed a book. I mean it when I say it, it wasn't meant to be an insult.

Re: Morons

Vikram A Punathambekar11-May-08 18:42

Vikram A Punathambekar

11-May-08 18:42

CG, I appreciate the good work you're doing here. There will, sadly, always be numbskulls who hit out at people trying to help them.

If it makes you feel any better, I went through the same phase for months a year or two back - EVERY answer I gave was voted a single 1.

Cheers,
Vikram.

The hands that help are holier than the lips that pray.

Re: Morons

Christian Graus11-May-08 19:44

Christian Graus

11-May-08 19:44

Yeah, I get it all the time, I posted in the lounge about a good book I am reading, and got a 1. I don't really care too much, but I am frustrated mostly that I try to help people and they refuse to be helped.

Adding a Record via LINQ

belzer11-May-08 11:39

belzer

11-May-08 11:39

Hello,

i am using LINQ to query my data, but i have a problem inserting records, i cannot see how to insert records, when a look on the property of the table in the DBML file the Insert property is dimmed and it says use runtime.

In all the articles i see that there is a method <datacontext>..Add() however i don't have it, why?

Please help

Thanks

Tooltip for TrackBar(Slider Bar)?

jamilkhan00711-May-08 9:52

jamilkhan007

11-May-08 9:52

How Can I Make a ToolTip to show the current value of a TrackBar Control when the slider is moved? for example The volume control in windows media player?

(Jameel)

Re: Tooltip for TrackBar(Slider Bar)?

CodingYoshi11-May-08 10:03

CodingYoshi

11-May-08 10:03

Handle the track bar value changed event and within the handler change the text of the tooltip. Here is the basic idea but not the syntax:

public void TrackBarValueChanged(Object o, Eventarguments e)
{
// here change the tooltip text
}

Re: Tooltip for TrackBar(Slider Bar)?

jamilkhan00711-May-08 10:25

jamilkhan007

11-May-08 10:25

Thanx alot, i know it already friend, what should i write inside this mathod? i expect something like this

private void Binary_ThresholdBar_Scroll(object sender, EventArgs e)
{
TrackBar.Tooltip= Trackbar.value.toString();
//or any thing like that sensible?

}

(Jameel)

Re: Tooltip for TrackBar(Slider Bar)?

CodingYoshi11-May-08 12:39

CodingYoshi

11-May-08 12:39

aToolTip.Show(Trackbar.value.toString(), Me.Parent, New Point(x position, y position))

Keyboard Shortcut for Windows Service

M.SADEGHI11-May-08 8:05

M.SADEGHI

11-May-08 8:05

Hi,
I'm new to event handling in C#. I'm writing a windows service and i want a configuration form opens when user press a shortcut(like Ctrl + Alt + F12). I tried event handling and delegates but when the form had no focus it didn't work.

I want to know how i should listen for keyboard events when i have just a windows service or a form without focus. any help is really appreciated.

Thanks in advance
Sadeghi

MSK
From Persia, the land of Love and Freedom

Re: Keyboard Shortcut for Windows Service

Giorgi Dalakishvili11-May-08 8:28

Giorgi Dalakishvili

11-May-08 8:28

This discussion might help: To know key pressed in windows service[^]

Giorgi Dalakishvili

#region signature
my articles
#endregion

Picturebox confusion

Eric25611-May-08 6:14

Eric256

11-May-08 6:14

Hopefully someone here can help.

I've got a picturebox control with scrollbars. I've also set it up so that I can click on the picture box that has an image and draw a box border by dragging the mouse to whatever dimensions I want the box to be. It's basically a utility program for setting up hotspots on an image that will be saved into an array. This part works perfectly.

The problem is that if I scroll the image up or down so that the offset might be then try to draw my box, the image starts to do some flickering with it bouncing back and forth with how the image should be displayed (let's say an offset of X = 100, Y = 100 - which is what it is supposed to be since I have moved the image over with the scrollbars) and bouncing back to the default position (X = 0, Y= 0)

I've got this bit of code in my hScrollbar1_Scroll, vScrollbar1_Scroll, PictureBox_Paint, and Form1_Paint events:

Graphics g = pictureBox1.CreateGraphics();

g.DrawImage(pictureBox1.Image,
new Rectangle(0, 0, pictureBox1.Right - vScrollBar1.Width,
pictureBox1.Bottom - hScrollBar1.Height),
new Rectangle(hScrollBar1.Value, hScrollBar1.Value,
pictureBox1.Right - vScrollBar1.Width,
pictureBox1.Bottom - hScrollBar1.Height),
GraphicsUnit.Pixel);

Somewhere there is an event that is showing this image in the default position of 0,0 and it's not taking the values from the Scrollbars into consideration.

I am using picturebox1.Invalidate(); whenever I am drawing on that surface which I am *assuming* triggers the paint event(s).

Re: Picturebox confusion

CodingYoshi11-May-08 7:11

CodingYoshi

11-May-08 7:11

May I see a snapshot? I have somewhat a hard time picturing it. Also, are you saying the above code is in hScrollbar1_Scroll, vScrollbar1_Scroll, PictureBox_Paint, and Form1_Paint events. All of the events have the same code?

Re: Picturebox confusion

Eric25612-May-08 3:08

Eric256

12-May-08 3:08

Not sure how to attach an image to this short of posting it elsewhere and linking to it, but hopefully this will help:

****************************
*         *                *
*    B    *       A        *
*         *                *
***********                *
*               ************
*               *          *
*               *     C    *
*               *          *
****************************

A represents the overall bitmapped image.
B represents the size of the picturebox and what part of the bitmapped image that shows in the default (0,0) position.
C represents what part of the bitmapped image is showing in the picturebox when the image has been scrolled to its farthest right and bottom. NOTE that C can be anywhere depending on how far you have scrolled the horizontal and vertical scrollbars.

The problem is that when, for example, I am in the C section, if I try to draw my box there (MouseDown, MouseMove, and MouseUp Events), the image will flicker back and forth between the B & C positions. At the end of my MouseDown, MouseMove, and MouseUp events, I am invalidating the picturebox to force the picturebox_Paint event, so there is no reason that the picturebox should be going back to the B position.

I did manage to resolve this issue however. Turns out that it was the Invalidate that was messing things up. I *assumed* that PictureBox.Invalidate forces the Picturebox_Paint event. What it apparently was doing was redrawing the image in the picturebox based on default settings, THEN calling PictureBox_Paint, which told it to paint the section based on the positions of the scrollbars. Net result was flickering back and forth between the 2 positions. Maybe my explanation here is incorrect, but getting rid of the Invalidate command and parking that code (drawing the image based on the scrollbars position) in there instead fixed the problem. No flicker and the image stays put. Smile | :)

Woot! Onward and forward...

Re: Picturebox confusion

Christian Graus11-May-08 12:29

Christian Graus

11-May-08 12:29

Overall, I think it would be easier to abandon the picture box and just do all this in your own paint event.

Copying Formatted Text from DataGrid

User 1278211-May-08 5:47

User 12782

11-May-08 5:47

I've been searching for how to do this for quite awhile, so please forgive me if the answer is easy.

I have a DataGrid displaying numbers and based on the value of number the cell is formatted (e.g. ForeColor). I use Clipboard.SetDataObject(dataGridMatrix.GetClipboardContent()); to copy the DataGrid (ClipboardCopyMode has been enabled).

When I paste into Excel, i get the values as expected but with no formatting.

Is there a way to copy the formatting?

My understanding is the grid is copied as HTML which could contain formatting and which I know Excel is capapable of interpreting.

Thanks

modified 12-Jul-20 21:01pm.

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