Re: KeyEventArgs question: Get one of the arrow keys and space key at the same time - C# Discussion Boards

How to confirm user & pass with active directory

treuveni25-Jun-09 1:31

treuveni

25-Jun-09 1:31

Hi,
How i can integrates my application with the active directory and autenticate the user & pass.

Thanks

Re: How to confirm user & pass with active directory

J4amieC25-Jun-09 1:52

J4amieC

25-Jun-09 1:52

See here[^]

KeyEventArgs question: Get one of the arrow keys and space key at the same time

Mc_Topaz25-Jun-09 1:12

Mc_Topaz

25-Jun-09 1:12

Hi!

In a simple game I'm creating, I need to trigger some methods when one of the arrow keys are pressed as well as the space key.

I'm using this code in the form to receive the keyboard inputs:

protected override void OnKeyDown(KeyEventArgs e)
{
            base.OnKeyDown(e);

            if (e.KeyCode == Keys.Up && e.KeyCode == Keys.Space)
                MessageBox.Show("UP & SPACE");
}

Nothing happens when I run the code. The OnKeyDown event don't seem to handle this condition at all.

How shall I solve this problem?

Re: KeyEventArgs question: Get one of the arrow keys and space key at the same time

OriginalGriff25-Jun-09 1:20

OriginalGriff

25-Jun-09 1:20

If you look at the documentation, (or even just try it and look at what you get) I think you will see that you get a OnKeyDown event for each key. No, not together. Seperately. One after the other.

Just how did you think e.KeyCode was going to equal two different values? Rewrite your code as

if (e.KeyCode == 1 && e.KeyCode == 2)

and you might get the point?

I am posting this to Coding horrors as a warning to all other students.

No trees were harmed in the sending of this message; however, a significant number of electrons were slightly inconvenienced.

This message is made of fully recyclable Zeros and Ones

Re: KeyEventArgs question: Get one of the arrow keys and space key at the same time

Mc_Topaz25-Jun-09 6:08

Mc_Topaz

25-Jun-09 6:08

Really good answer, thanks Thumbs Up | :thumbsup:

Even if you didn't offer any solution Poke tongue | ;-P

I have never thought that e.KeyCode never could return two or more keyboard inputs Sniff | :^)

Re: KeyEventArgs question: Get one of the arrow keys and space key at the same time

stancrm25-Jun-09 1:50

stancrm

25-Jun-09 1:50

So far as I know, you can only use:
"Shift / Ctrl / Alt" + Key

But not Space and Up.

Re: KeyEventArgs question: Get one of the arrow keys and space key at the same time

Mc_Topaz25-Jun-09 6:12

Mc_Topaz

25-Jun-09 6:12

Yes, I know how Shift/Alt/Ctrl + key.

Back to my question, is there any solution for this at all?

Re: KeyEventArgs question: Get one of the arrow keys and space key at the same time

Dan Neely25-Jun-09 2:33

Dan Neely

25-Jun-09 2:33

Because you get a separate event for each key pressed if you want to do custom combinations you need to set your own flags for each key of interest in the key down events and clear them in the key up events.

It is a truth universally acknowledged that a zombie in possession of brains must be in want of more brains.
-- Pride and Prejudice and Zombies

Re: KeyEventArgs question: Get one of the arrow keys and space key at the same time

Mc_Topaz25-Jun-09 6:48

Mc_Topaz

25-Jun-09 6:48

I figured out a solution based on your answer, thanks!

Printer Job status using PJL

koppewar25-Jun-09 0:51

koppewar

25-Jun-09 0:51

can anyone please tell me how to get the printer Job status using PJL command.I used the following command

sendString = String.Format("\x1B%-12345X@PJL \r\n @PJL JOB NAME = \"MyJob\" START = 1 \r\n PJL USTATUS JOB = ON \r\n @PJL INFO USTATUS \r\n @PJL ENTER LANGUAGE = PCL \r\n\x1B E . . . . PCL Job . . . . \x1B E\x1B%-12345X@PJL \r\n @PJL EOJ NAME = \"MyJob\" \r\n \x1B%-12345X\r\n");

Is this command appropriate?How to create JOB name or ID ?here I am giving my own name(MYJob)and job id shud b generated by printer or we have to give it while printing the document?Please help me to know the printer job status.

drag and drop file and/or add note to window form calendar

kyi kyi25-Jun-09 0:07

kyi kyi

25-Jun-09 0:07

hello all,

is there any idea to do that, pls? i only found out drag and drop file to listbox control.

thanks in advance,

kyi kyi

How to check if documents on shared folders are availiable?

Succodimele24-Jun-09 23:42

Succodimele

24-Jun-09 23:42

Hello

I have to build an application which checks if a document is still availiable on a specific path. This application is used on our intranet. Html sites are no problem but how can I check, if a file on a Share exits? e.g. \\Server01\share$\test.doc
It should be possible to differ if the share is unavailiable or if the user hasn't enough rights to access.
Are there any opensource solutions for this problem or with which method can i solve my problem?

thanks for your help!

best reagrds
succo

Re: How to check if documents on shared folders are availiable?

Sk9325-Jun-09 0:12

Sk93

25-Jun-09 0:12

Would System.IO.File.Exists() not do the job?

You could then catch any FileNotFound or AccessDenied exceptions?

Re: How to check if documents on shared folders are availiable?

Mycroft Holmes25-Jun-09 0:49

Mycroft Holmes

25-Jun-09 0:49

Look into storing and using the UNC path[^].

Never underestimate the power of human stupidity
RAH

Usage of Lambda Expression

HarishBhattbhatt24-Jun-09 23:41

HarishBhattbhatt

24-Jun-09 23:41

I am an experienced developer in c# and working on LOB application from last 7 Years, I have some issues in understanding usage of Lambda expression in programming.

As far as i understand it is useful in case of

1) Working with LINQ (Grouping, Select,Where etc..)
2) We can pass Lambda expression to any function as argument, so it can be used in place of delegate or anonymous function or normal function.
3)We can create generic lambda function which takes any datatype variable as argument and can return any datatype
e.g.
MyFirstLambdaFunc((val1,val2) => val1+val2)
public R MyFirstLambdaFunc<R,T>(Func<T,T,R> lambdaexpression,T x,T y)
{
R Result = lambdaexpression(x, y);
return Result;
}
4)Coding can be compact

Now the question is that

1) Are there any other advantages ?
2) When we pass lambda expression as function we can pass only single line operation?
3) Can anybody have some case study or some practical example document ?

Thanks in Advance

Harish Bhattbhatt

Re: Usage of Lambda Expression

led mike25-Jun-09 4:47

led mike

25-Jun-09 4:47

Greetings, welcome to CodeProject Beer | [beer]

About your interest in Lambda, Click Here[^]

Re: Usage of Lambda Expression

Niladri_Biswas25-Jun-09 6:03

Niladri_Biswas

25-Jun-09 6:03

Visit these sites

http://www.slideshare.net/udooz/let-us-learn-lambda-using-c-30-presentation[^]

Exploring Lambda Expression in C#[^]
Smile | :)

Niladri Biswas

Combobox control..........?? [modified]

Hum Dum24-Jun-09 23:09

Hum Dum

24-Jun-09 23:09

using vs2003.
Its a data entry application, having some fields and buttons.

In this, I am using combobox control, getting data from DB in DataTable obj dt, then setting the datasource property of Combobox to this dt.

there is New button, when user clicks on it, it simply clears all fields text, their DataBindings, for combox also i am using it as

cbBox.DataBinding.Clear();
cbBox.Text = "";

then there Save button which saves data to DB, on this Save click event i am checking data entered, like

if(cbBox.Text =="")//here it shows previous text if user do not enter any data
// after clicking New button (in debugging), but if user enter some data then that 
//entered data
{
// related code
}

But here is problem, after clicking new button, all fields got clear, cbBox text goes blank. But if user did not enter any data in cbBox then it retains the previous text(text before clicking New button)

a) why this? how to rectify.

b)Related to DataRow?
when we load some data from DB, we fill it in Datatable obj first.
then iterate thru all rows.

SQL = "Select * from Data where ID = 23";
execute this SQL against DB.
assume ID is primary key,
now only single row returned,

How to get this DataRow without filling it in Datatable?

regards,

modified on Thursday, June 25, 2009 7:35 AM

Re: Combobox control..........??

padmanabhan N24-Jun-09 23:31

padmanabhan N

24-Jun-09 23:31

Hum Dum wrote:
a) why this? how to rectify.

Ans: Check whether your have written your code in
if(!page.ispostback)
{
//check whether your code lies here....
}

Hum Dum wrote:
SQL = "Select name from Data where ID = 23";
execute this SQL against DB.
assume ID is primary key,
now only single row returned,

How to get this DataRow without filling it in Datatable?

string con = ConfigurationManager.AppSettings["connect"];
SqlConnection conn = new SqlConnection(con);
conn.Open();
SqlCommand cmd = new SqlCommand("select name from Data where ID=23", conn);
object obj = cmd.ExecuteScalar();
conn.Close();
string name = obj.ToString();

Padmanabhan
My Articles[^]

Re: Combobox control..........??

Hum Dum25-Jun-09 1:33

Hum Dum

25-Jun-09 1:33

padmanabhan N wrote:
if(!page.ispostback)

If i am not wrong then ispostback is for web application, mine is window......??

padmanabhan N wrote:
object obj = cmd.ExecuteScalar();

It will return only 1st most column, not the entire row?
But i want whole row content.

sorry for wrong query
I want to write

SQL = "Select * from Data where ID= 23"

Receive mail by C# code

khosnur24-Jun-09 22:45

khosnur

24-Jun-09 22:45

i am developing a software like microsoft outlook express.i done mail sending but i can not receive mail....

please help me its urgent

Re: Receive mail by C# code

stancrm24-Jun-09 23:00

stancrm

24-Jun-09 23:00

Retrieve Mail From a POP3 Server Using C#[^]

Re: Receive mail by C# code

khosnur6-Jul-09 23:45

khosnur

6-Jul-09 23:45

thanks a lot for reply i am dunning the source

Re: Receive mail by C# code

khosnur6-Jul-09 23:47

khosnur

6-Jul-09 23:47

But There is an error.

Error:Value cannot be null.
Parameter name: item

And its point to :Status.Items.Add(RdStrm.ReadLine());

Thank you

Image processing problem...

S K Y24-Jun-09 22:08

S K Y

24-Jun-09 22:08

how can i change the contrast of the image at the same time changing brightness. my brightness can change. its working fine i want to change the contrast at the same time....can i use this method too ???

Bitmap image = new Bitmap("d:\\14.jpg");
            Bitmap bm = new Bitmap(image, 350, 300);

            System.Drawing.Bitmap TempBitmap = bm;
            float FinalValue = 0.5f;
            System.Drawing.Bitmap NewBitmap = new System.Drawing.Bitmap(TempBitmap.Width, TempBitmap.Height);
            System.Drawing.Graphics NewGraphics = System.Drawing.Graphics.FromImage(NewBitmap);
            float[][] FloatColorMatrix ={
            new float[] {1, 0, 0, 0, 0},
            new float[] {0, 1, 0, 0, 0},
            new float[] {0, 0, 1, 0, 0},
            new float[] {0, 0, 0, 1, 0},
            new float[] {FinalValue, FinalValue, FinalValue, 1, 1}
        };

            System.Drawing.Imaging.ColorMatrix NewColorMatrix = new System.Drawing.Imaging.ColorMatrix(FloatColorMatrix);
            System.Drawing.Imaging.ImageAttributes Attributes = new System.Drawing.Imaging.ImageAttributes();
            Attributes.SetColorMatrix(NewColorMatrix);
            NewGraphics.DrawImage(TempBitmap, new System.Drawing.Rectangle(0, 0, TempBitmap.Width, TempBitmap.Height), 0, 0, TempBitmap.Width, TempBitmap.Height, System.Drawing.GraphicsUnit.Pixel, Attributes);
            Attributes.Dispose();
            NewGraphics.Dispose();

           picDecode.Image = NewBitmap;

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