C# Discussion Boards - CodeProject

System.Runtime.InteropServices.ExternalException

ampk17-Oct-06 0:40

17-Oct-06 0:40

Hi! i want to retrieve data from clipboard. for this i m using code of line.

System.Windows.Forms.IDataObject clipboardData = System.Windows.Forms.Clipboard.GetDataObject();

this code run on windows server 2000 successfully. but on windows server 2003 it is thrown an exeption: Requested Clipboard operation did not succeed.[System.Runtime.InteropServices.ExternalException]

please help me.

Amit Kuamr Pandey

how to plot ?

s4_sabahatf16-Oct-06 23:33

s4_sabahatf

16-Oct-06 23:33

i wnat to plot(IN GRAPH) the elenments ,vaLUES IN ARRAY

Re: how to plot ?

Stefan Troschuetz17-Oct-06 0:07

Stefan Troschuetz

17-Oct-06 0:07

Maybe this suit your needs: A flexible charting library for .NET[^]

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook

www.troschuetz.de

Range validation attribute

praveenqwe16-Oct-06 23:12

praveenqwe

16-Oct-06 23:12

Hi,
Can any one help me in creating a range validation custom attribute (integer).

Thank you,

regards

Praveen

Control Development Resources

Brady Kelly16-Oct-06 22:41

Brady Kelly

16-Oct-06 22:41

Ive just developed my first little grid control (based on Control), and because of negligence on my part, it took some figuring out that I need to Invalidate my whole area in the OnResize method to redraw the grid lines (in OnPaint) correctly every time the control is sized. I would love to find a resource that explains the lifecycle, the event model, owner drawing, etc. Pointers to good articles or sites would be greatly appreciated.

Re: Control Development Resources

J4amieC16-Oct-06 22:46

J4amieC

16-Oct-06 22:46

Cant answer your direct question, but something to consider is that you can use SetStyle within your control to set the ResizeRedraw bit to automatically redraw your control on resize

this.SetStyle(ControlStyles.ResizeRedraw,true);

---

How to get answers to your questions[^]

RichTextBox - Scrolling to the current line ?

fracalifa16-Oct-06 22:28

fracalifa

16-Oct-06 22:28

Hi all,

I have the problem to keep the current added line in a RichTextBox in view. So the text should be scrolled if it exceeds the frame range.

I tried it with ScrollToCare method but it has no visible effect.

The code snippet should place the cursor always at the current position
but it does not scroll to the end of the lines. I tried 3 versions with no effect.

private void button1_Click(object sender, System.EventArgs e)<br />
{<br />
try<br />
{<br />
this.richTextBox1.Clear();<br />
for(int i=0; i<200; i++)<br />
{<br />
this.richTextBox1.SelectedText = "Index = " + i.ToString() + "\r\n"; // 1. try<br />
// this.richTextBox1.AppendText("Index = " + i.ToString()+ "\r\n"); // 2. try<br />
// this.richTextBox1.Text += "Index = " + i.ToString()+ "\r\n"; // 3. try<br />
this.richTextBox1.ScrollToCaret();<br />
}<br />
}<br />
catch{}<br />
}

What's wrong ?

Tnx in advance
Regards
Frank

Re: RichTextBox - Scrolling to the current line ?

sam#16-Oct-06 22:39

sam#

16-Oct-06 22:39

Use
this.richTextBox1.SelectionStart = this.richTextBox1.text.Length;

Hope it'll solve your problem

sameer

Re: RichTextBox - Scrolling to the current line ?

fracalifa16-Oct-06 22:55

fracalifa

16-Oct-06 22:55

Thank's

No - that's not the solution.

Frank

Re: RichTextBox - Scrolling to the current line ?

AB777116-Oct-06 23:17

AB7771

16-Oct-06 23:17

try this
richtext1.text.selectionstart = richtext1.text.length;
richtext1.scrolltocaret();

Thanks & Regards,
Pramod
"Everyone is a genius at least once a year"

Re: RichTextBox - Scrolling to the current line ?

fracalifa16-Oct-06 23:40

fracalifa

16-Oct-06 23:40

Hi,

that's what I have already tried - with no success.

this.rTB_Info.Clear();<br />
for(int i=0; i<200; i++)<br />
{<br />
    this.rTB_Info.SelectedText = "Index = " + i.ToString() + "\r\n";<br />
    // this.rTB_Info.AppendText("Index = " + i.ToString()+ "\r\n");<br />
    // this.rTB_Info.Text += "Index = " + i.ToString()+ "\r\n";<br />
    this.rTB_Info.SelectionStart = this.rTB_Info.Text.Length;<br />
    // this.rTB_Info.SelectionLength=1;<br />
    this.rTB_Info.ScrollToCaret();<br />
}<br />

Some new ideas ?

Tnx
Frank

Re: RichTextBox - Scrolling to the current line ?

AB777116-Oct-06 23:46

AB7771

16-Oct-06 23:46

Dont call the Clear method

Thanks & Regards,
Pramod
"Everyone is a genius at least once a year"

Re: RichTextBox - Scrolling to the current line ?

fracalifa16-Oct-06 23:59

fracalifa

16-Oct-06 23:59

Hi,
clear is outside the loop - it has no effect.

Please tryout the snippet before.

Tnx
Frank

Re: RichTextBox - Scrolling to the current line ?

sam#17-Oct-06 0:09

sam#

17-Oct-06 0:09

write this before the loop
this.rTB_Info.Focus();

sameer

Re: RichTextBox - Scrolling to the current line ?

fracalifa17-Oct-06 0:22

fracalifa

17-Oct-06 0:22

Hi Sameer,

Great, it works !!! Big Grin | :-D

this was the deciding line of code.

Tank you
Regards Frank

Re: RichTextBox - Scrolling to the current line ?

AB777117-Oct-06 0:10

AB7771

17-Oct-06 0:10

I tried ur code it scrolls to the current line
wht's wrong there?
wht more do u want?

Thanks & Regards,
Pramod
"Everyone is a genius at least once a year"

Re: RichTextBox - Scrolling to the current line ?

Dave Kreskowiak17-Oct-06 2:21

Dave Kreskowiak

17-Oct-06 2:21

The ScrollToCaret method only works if the RTB has the input focus, so...
(quit putting all the damn this in your code, you don't need them...)

rTB_Info.SelectionStart = rTB_Info.Text.Length;
rTB_Info.Focus();
rTB_Info.ScrollToCaret();

Dave Kreskowiak
Microsoft MVP - Visual Basic

Re: RichTextBox - Scrolling to the current line ?

fracalifa17-Oct-06 3:19

fracalifa

17-Oct-06 3:19

Thank you,

it would be helpfull, to update the MSDN documentation for the RichTextBox - ScrollToCaret() with your information.
http://msdn2.microsoft.com/en-us/library/system.windows.forms.textboxbase.scrolltocaret.aspx[^]

Tnx
Frank

Re: RichTextBox - Scrolling to the current line ?

Dave Kreskowiak17-Oct-06 18:05

Dave Kreskowiak

17-Oct-06 18:05

It's already in there. It's the first Note listed in the documentation:

Note
This method has no effect if the control does not have focus or if the caret is already positioned in the visible region of the control.

Dave Kreskowiak
Microsoft MVP - Visual Basic

Re: RichTextBox - Scrolling to the current line ?

fracalifa17-Oct-06 20:47

fracalifa

17-Oct-06 20:47

Re: RichTextBox - Scrolling to the current line ?

Dave Kreskowiak18-Oct-06 1:44

Dave Kreskowiak

18-Oct-06 1:44

We've got the same saying in the States. In MS' documentation, it most definately applies!

Dave Kreskowiak
Microsoft MVP - Visual Basic

two column sorting

PaulaM16-Oct-06 22:14

PaulaM

16-Oct-06 22:14

hi,i have a Databound Datagrid that needs to be sorted by two columns at run time eg
column DISTANCE(order must be ascending )and Column STATUS(must appear in this order good,bad,ugly)
if any of you can refer me to articles or samples that work the same way
i hope it makes sense
thanks

regards paula

Thinning a image

s4_sabahatf16-Oct-06 22:13

s4_sabahatf

16-Oct-06 22:13

Aoa,
i want the code or C# algo,which remove extra pixels & thinn or skelton the image.
for example in the image there are double or triplr lines,i want to reduce this lines into a single line

Key Processing in 2003 Question

eyalRF16-Oct-06 20:56

eyalRF

16-Oct-06 20:56

Hello,

How can I ignore the keys the user inserts into a textbox ?

I've tried signing up to the keydown event, end use the e.SuppressKeyPress = true to achieve it in .NET 2005, but this is not supported by .NET 2003.

Maybe use the Handle property for this ?

Thanks, Eyal

Re: Key Processing in 2003 Question

sam#16-Oct-06 21:46

sam#

16-Oct-06 21:46

use KeyPress Event and make
e.handle=true;

sameer

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