C# Discussion Boards - CodeProject

Bruzak17-Apr-05 19:45

17-Apr-05 19:45

Hi there,

How do I pick the screen-pixel-color from C#?
More precisely, I want to pick a color from a line drawn on a form.
IE: not a bitmap on the form but a line drawn with e.Graphics.DrawPath(etc).

I tried this forum, Google ... where did I miss it?

Thanks,

Akos

Re: Picking Screen Pixel Color - C#

Member 185560817-Apr-05 20:48

Member 1855608

17-Apr-05 20:48

I am the same as you

Re: Picking Screen Pixel Color - C#

Dave Kreskowiak18-Apr-05 4:46

Dave Kreskowiak

18-Apr-05 4:46

Yeah, but you'r is FAR more complicated. You will have to take that color and search around it looking for pixels of the same, or similar color. Then you'll have to feed the coordinate for all those pixels into some form of a curve fitting algorithm. This, you'll probably find in some univerisity research paper somewhere. Don't ask for a code sample, 'cause I don't have one. Let your fingers do the walking through Google...

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: Picking Screen Pixel Color - C#

mav.northwind17-Apr-05 21:48

mav.northwind

17-Apr-05 21:48

Hi!
AFAIK you'd have to create a screenshot of the form (there are articles here on CP dealing with this). Then you can use GetPixel() for the resulting bitmap.

Regards,
mav

Re: Picking Screen Pixel Color - C#

abcxyz8218-Apr-05 5:27

abcxyz82

18-Apr-05 5:27

Why dont you add pencolor property while drawing line and retrieve it as and when required!!

Hope it helps.
MaulikCE Smile | :)

Re: Picking Screen Pixel Color - C#

Bruzak18-Apr-05 16:41

Bruzak

18-Apr-05 16:41

I'm not quite sure what you mean. I know the color i'm looking for.
What I I don't know is, how do i get the color of a pixel on the screen under the cursor.
Or on another way: how do i get the color of any pixel on the screen?
I know, I could use the API. Is there a way to do it from C#?

Thanks,

A

I tried a serialization deserialization network application

Mohammed Aijaz Mohiuddin17-Apr-05 18:43

Mohammed Aijaz Mohiuddin

17-Apr-05 18:43

I am trying to serialize a simple class over the network.

I found the following error at receiver side.

Additional information: Cannot find the assembly BinaryDataSender, Version=1.0.1934.14107, Culture=neutral, PublicKeyToken=null.

What might be the problem? for this also I tried a lot to find the information regarding this, but in vain.

MOhammed Aijaz MOhiuddin.

Re: I tried a serialization deserialization network application

NewSilence23-Apr-05 16:30

NewSilence

23-Apr-05 16:30

what formatter do you use? SOAP, XML, Binary?

how do you serialize and deserialize your instance?

I cannot include System.Runtime.Serialization.Formatters.Soap namespace

Mohammed Aijaz Mohiuddin17-Apr-05 18:11

Mohammed Aijaz Mohiuddin

17-Apr-05 18:11

Dear all,

I tried to include the above namespace in my new project of Visual C#. I could not do so. Later I tried on two other systems, the same problem.

Then I opened a previous project of me, I find that System.Runtime.Serialization.Formatters.Soap namespace is there. Then I tried to include the same namespace by a dummy statement in previous project, I find that I can include the same namespace.

What might be the reason ?, I have wasted lot of time and then consult this Message Boards.

Thank you

Re: I cannot include System.Runtime.Serialization.Formatters.Soap namespace

Christian Graus17-Apr-05 18:23

Christian Graus

17-Apr-05 18:23

You can't do a using statement successfully until the library is included in the list of references at the top of your project in the Solution Explorer. You can't use it until it's part of your project.

Christian

I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer

Re: I cannot include System.Runtime.Serialization.Formatters.Soap namespace

Mohammed Aijaz Mohiuddin17-Apr-05 18:50

Mohammed Aijaz Mohiuddin

17-Apr-05 18:50

Thanks for that Mr. Christian.

How do I size a RichTextBox to fit it's contents??

OnlyTaz17-Apr-05 17:31

OnlyTaz

17-Apr-05 17:31

Using a Windows Form I have a RichTextBox at the bottom of the form. The form is scrollable. I'm loading a rtf file into the richtextbox. I wan't to be able to have the richtextbox resize itself to fit the contents of the rtf file that was loaded. The rtf document does have some images in it.

Can anyone help me out?

Re: How do I size a RichTextBox to fit it's contents??

alexdg0418-Apr-05 1:21

alexdg04

18-Apr-05 1:21

ok lets see first u must set the the dock property to top then in the paint event do somethink like this

private void RichTextBox1_paint(object sender, PaintEventArgs e)
{
int lines;
int chars;
RichTextBox rchtxb = (RichTextBox) sender;
StringFormat myformat = new StringFormat();
myformat.FormatFlags = StringFormatFlags.DisplayFormatControl;
SizeF layout = new SizeF(this.Width,this.Height);
int newheight = 6 + Convert.ToInt16(e.Graphics.MeasureString(rchtxb.Text,rchtxb.Font,layout,myformat,out chars,out lines).Height);
rchtxb.Height = newheight;
this.heigth = newheigth
}

yo listen if u wantso u can do this in a simple void just like thus

void autoresize(object sender, painteventargs e)
and then ind ther pain event of anny richtextxbox call it;

i hope this help if need any thing else tell me by email alexcuban@inder.co.cu

Re: How do I size a RichTextBox to fit it's contents??

OnlyTaz18-Apr-05 11:11

OnlyTaz

18-Apr-05 11:11

Sorry didn't help. The richtextbox is at the bottom of the form so it can't be docked to the top. Couldn't get the code to work. Where exactly do i put the code? And how do i call it?

Thought it would be easy enough to do, oh well..

Where is says:

this.richTextBox2.Size = new System.Drawing.Size(760, 200);

can this line not be changed to call a function that autoresizes the richtextbox??

Copy file

vuthaianh17-Apr-05 15:53

vuthaianh

17-Apr-05 15:53

How to copy file from a directory to another
Thanks in advance

Re: Copy file

Yulianto.17-Apr-05 16:27

Yulianto.

17-Apr-05 16:27

see this[^]

<italic>Work hard, Work effectively and a bit of luck is the key to success.

How to make a Thread Save Sys Tray Application.

4915217-Apr-05 6:28

49152

17-Apr-05 6:28

I have a Sys Tray Application with a NotifyIcon,

But I have a big problem that I have been trying to solve for days now.

If I want the Application to show a window, but if I want to do it from another thread . How do I do that then ?

I know that if I have a normal Window Application I can solve this by using invoke, etc.

But ApplicationContext have no such methods, like invoke.

What do I do ? How can I make my own Synchronizer, that can help me call a method on the Application main gui Thread ?

Can i make somekind of workaround, with a mainform that is not shown at all?

Best regards, Anders Both - Denmark.

Hiiiii developers, I am interested with C#

Anas Nawwaf Alhussein17-Apr-05 6:25

Anas Nawwaf Alhussein

17-Apr-05 6:25

Hi every one , this is my first entering to this forum.
I hope we will help ourselves to be professional in C# Smile | :)

C# interested

Re: Hiiiii developers, I am interested with C#

eggie517-Apr-05 6:33

eggie5

17-Apr-05 6:33

I don't understand what the point of interfaces are? Can you explain it to me?

/\ |_ E X E GG

Re: Hiiiii developers, I am interested with C#

DavidNohejl17-Apr-05 6:41

DavidNohejl

17-Apr-05 6:41

eggie5 wrote:
I don't understand what the point of interfaces are?

It depends on what your intentions are... Smile | :)

David

Never forget: "Stay kul and happy" (I.A.)

David's thoughts / dnhsoftware.org / MyHTMLTidy

Re: Hiiiii developers, I am interested with C#

Imran Adam18-Apr-05 6:57

Imran Adam

18-Apr-05 6:57

what is that eggie5 on?????? Dead | X|

Cheers

Using WebServices

alexdg0417-Apr-05 5:24

alexdg04

17-Apr-05 5:24

I need to show a loading message or retrieving data message while im accessing to any webservice for data

Re: Using WebServices

MoustafaS17-Apr-05 14:17

MoustafaS

17-Apr-05 14:17

Create it in another thread it will do that jop

displaying data in datagrid...?? 2nd try

Imran Adam17-Apr-05 5:18

Imran Adam

17-Apr-05 5:18

Hi experts,

I am trying to display data in a datagrid from a xml file. I have no problem reading the xml file, however when i try to display the data in a datagrid all i get is "null" values. I have bound my dataset to the datasource property but still dont know where im going wrong

can anyone point me in the right direction???

Cheers Smile | :)

Re: displaying data in datagrid...?? 2nd try

Polis Pilavas17-Apr-05 14:48

Polis Pilavas

17-Apr-05 14:48

A simple example:

//Load data from the XML document into a dataSet<br />
DataSet ds = new DataSet();<br />
ds.ReadXml("99999.xml");<br />
<br />
//Show all of the records instead of the table name and the "+" symbol<br />
this.dataGrid1.DataSource = ds.Tables[0].DefaultView;<br />
<br />
//No adding of new rows through dataview is to take place<br />
CurrencyManager cm = (CurrencyManager)this.BindingContext[this.dataGrid1.DataSource, this.dataGrid1.DataMember];      <br />
((DataView)cm.List).AllowNew = false;<br />
<br />
//# of Rows (records) in the dataGrid<br />
this.dataGrid1.CaptionText = "Total Tasks: " + dataGrid1.BindingContext[dataGrid1.DataSource, dataGrid1.DataMember].Count.ToString();

Hope this helps

Regards,
Polis

Can you practice what you teach?

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.