C# Discussion Boards - CodeProject

Patrick Etc.24-Apr-07 18:02

24-Apr-07 18:02

I think I get it. You're doing the type of thing where you have your main editor screen, and then a Find dialog pops up over the editor, like the Visual Studio find dialog does.

You want the Find to call back to the editor to highlight the search text.

You're making the call to Find() correctly, but you need a reference to the actual RichTextBox that is your editor.

My suggestion would be to either

a) raise an event from your Find dialog telling the main editor that a search has been requested, and let the editor perform the search; or

b) pass a reference to the RichTextBox into the Find dialog.

Approach b) is the easiest, but approach a) is more in line with OOP principles, and it is more extensible (what if you decide you want to expand the search capabilities.. for everything you add, you'll have to pass new information between the forms, rather than just putting it all into an event).

------------
Cheers,
Patrick

Re: RichTextBox find text

Adobe200724-Apr-07 18:13

Adobe2007

24-Apr-07 18:13

Thanks patrick for that suggestion, since im very new to c#, i haven't got the slightest idea what you've just said...

While trying to figure this "Find Text" thing out, i came up with this:

Editor form = new Editor();
int position = form.EditingArea.Find(FindTextBox.Text, 0, RichTextBoxFinds.None);
form.EditingArea.SelectionStart = form.EditingArea.SelectionStart + position;

but everytime i type into my editor and try to look for it, the program keeps trowing exception that -1 is not a valid selection start.

Can anyone show me how in the world you implement a simple text search for a RichTextBox ?

Re: RichTextBox find text

Arun.Immanuel24-Apr-07 18:34

Arun.Immanuel

24-Apr-07 18:34

The error is bcos the value of position will always be ZERO.

Reason:
=======
Editor form = new Editor();
--This will create a new form window
which will have the RichtextBox control without any text.

So, obviously the Find function will retrun -1.

Regards,
Arun Kumar.A

Re: RichTextBox find text

Adobe200724-Apr-07 18:38

Adobe2007

24-Apr-07 18:38

So how can i work with another form's content without creating a new instance of it?

What you just said makes sense to me, however, i have no idea how to fix this. A suggestion would be much appreciated...

Re: RichTextBox find text

Arun.Immanuel24-Apr-07 18:46

Arun.Immanuel

24-Apr-07 18:46

Try this:

Create 2 forms:
1.This form should contain the RichText box control and a button to open
the second form.

2.This form should contail a TextBox and a button to find the text
entered in the TextBox.

code for Form1(Show find Dialog button):
========================================
Form Form2=new Form();
Form2.RichTextBoxToFind=EditingArea; //Creating instance for Form2.
Form2.Show();

code for Form2:
===============
Have a public member in the class:

class Form2:System.......
{
public RichTextBox RichTextBoxToFind;

FindButton_Click()
{
int position = RichTextBoxToFindFind(FindTextBox.Text, 0, RichTextBoxFinds.None);
RichTextBoxToFind.SelectionStart = RichTextBoxToFind.SelectionStart + position;

}
}

This is the simplest way of doing this.
But we have to do like how Mr.Patrick suggested.

Hope , this helps U.

Regards,
Arun Kumar.A

Re: RichTextBox find text

Sathesh Sakthivel24-Apr-07 19:00

Sathesh Sakthivel

24-Apr-07 19:00

Hi Arun Kumar, ask him to do the work.

Let him work on the application what he got.

if he get any error we can help here dont help him by providing the code .

pls suggest the ideas for developing the application.Dont give him the code as you have provided here.

Regards,

Satips.

Re: RichTextBox find text

Arun.Immanuel24-Apr-07 19:05

Arun.Immanuel

24-Apr-07 19:05

Thank You Mr.Satips.

I will follow Ur suggestion.

Regards,
Arun Kumar.A

Re: RichTextBox find text

Adobe200724-Apr-07 19:12

Adobe2007

24-Apr-07 19:12

Thanks for the suggestion earlier.

I did do the work and finally got the Find & Replace working using this -> http://www.codeproject.com/cs/miscctrl/SearchableControls.asp[^]

Re: RichTextBox find text

Sathesh Sakthivel24-Apr-07 19:37

Sathesh Sakthivel

24-Apr-07 19:37

this article will help you in developing your application.

Regards,

Satips.

BindingSource question, help me

phantanagu24-Apr-07 17:06

phantanagu

24-Apr-07 17:06

Hi,
I want to filter the productID that starts with "MDF", so I use
bindingsource1.filter = "productID like 'NAPLE 5'-02'" (look like sql query), but it's not working. After that I corrected bindingsource1.filter = bindingsource1.filter ="productID like 'NAPLE 5%-02'", it's also not working and appear error "The expression contains an invalid string constant:'. "
Somebody could correct the code will be appreciated.
Thanks in advance.

It seem to be a solution or an answer.

Re: BindingSource question, help me

Rocky#24-Apr-07 19:35

Rocky#

24-Apr-07 19:35

phantanagu wrote:
I want to filter the productID that starts with "MDF"

for what ur saying here it should be something like this, I think..
bindingsource1.Filter = "ProductID LIKE 'MDF%'";

phantanagu wrote:
bindingsource1.filter = "productID like 'NAPLE 5'-02'"

What ur trying to do here is a ? for me

hope it helps

Rocky

Looking for some regular expressions to match the File/Folder path

xibeifeijian24-Apr-07 16:18

xibeifeijian

24-Apr-07 16:18

Hi,all
I'm looking for some regular expressions to check whether a string is a File/Folder path.Anyone can help me? D'Oh! | :doh:

Thanks!

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Re: Looking for some regular expressions to match the File/Folder path

Rocky#24-Apr-07 19:44

Rocky#

24-Apr-07 19:44

^(([a-zA-Z]\ Smile | :)

|(\\))(\\{1}|((\\{1})[^\\]([^/:*?<>"|]*))+)$

this might be helpful to u, I havent tried it out myself though but I've googled it out right now.

Re: Looking for some regular expressions to match the File/Folder path

xibeifeijian24-Apr-07 20:02

xibeifeijian

24-Apr-07 20:02

Thanks a lot! Big Grin | :-D

It works excellent.
I find a small bug in it.The regular will match
c:\hello\dl\\\\\\\\\\\\\\\\\sdfsdfsdf\\asdf.

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Error 4 Expected class, delegate, enum, interface, or struct

m0dernist24-Apr-07 16:00

m0dernist

24-Apr-07 16:00

Hi... could anybody help me?? i gt this error "Error 4 Expected class, delegate, enum, interface, or struct".. i don't understand what it means.. can someone solve for me.. this is my code..

string{} tx_data = new string{13};
string{} rx_data = new string{9};
public int i;

Re: Error 4 Expected class, delegate, enum, interface, or struct

xibeifeijian24-Apr-07 16:24

xibeifeijian

24-Apr-07 16:24

Are these codes written by C#?
If these written by c#,let them in a class.And if you want to declare a string array,you should write like this:
string[] str=new string[]{"china","beijing"};

I think
string{} tx_data = new string{13};
should be replaced by
string[] tx_data = new string[]{"13"};

Good luck.

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Re: Error 4 Expected class, delegate, enum, interface, or struct

Christian Graus24-Apr-07 17:39

Christian Graus

24-Apr-07 17:39

xibeifeijian wrote:
string{} tx_data = new string{13};

This is wrong

xibeifeijian wrote:
string[] tx_data = new string[]{"13"};

This is right.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

How to Clear Contents of a NotePad Textfile

zoroyster24-Apr-07 15:48

zoroyster

24-Apr-07 15:48

Hi.

This is sorta no brainer question for some of you, but does anyone know the C# codes to clear all contents of a certain notepad file?

thanks a bunch

Re: How to Clear Contents of a NotePad Textfile

Keshav V. Kamat24-Apr-07 16:57

Keshav V. Kamat

24-Apr-07 16:57

one way would be to use a streamWriter object and clear all the contents of the file and close the same.

Keshav Kamat Smile | :)

India

Re: How to Clear Contents of a NotePad Textfile

xibeifeijian24-Apr-07 17:10

xibeifeijian

24-Apr-07 17:10

Try this please:->

using System.IO;

FileStream fs=new System.IO.FileStream(yourTxtFilePath,FileMode.Create);
fs.Close();

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Re: How to Clear Contents of a NotePad Textfile

zoroyster24-Apr-07 17:34

zoroyster

24-Apr-07 17:34

xibeifeijian ,code works perfectly!

thanks alot xibeifeijian and Keshav!!

How do you change Focus between Forms

MarkSchultz24-Apr-07 12:25

MarkSchultz

24-Apr-07 12:25

Hi,

I attempting to build an applications where I have three forms. MainForm, FormA, and FormB.

MainForm simply has a single button (for now) that pops FormA and FormB.

private void button1_Click(object sender, EventArgs e)
{
formA.Show();
formB.Show();
}

What I'm trying to do is have focus automatically change between FormA and FormB dependant on the users actions. IE. the user enters data on FormA, presses submit. While FormA is waiting for an answer from the server, and want focus to change to FormB so the user can continue to work.

any clues on how do to this in C# ? (using Visual Studios 2005)

Re: How do you change Focus between Forms

MarkSchultz24-Apr-07 13:02

MarkSchultz

24-Apr-07 13:02

Ok, I got delegates to work...though not pretty (so if you have a nice clean way of doing it, please let me know).

But now I've discovered another problem. While FormA is working, FormB does pop to the front what really isn't active until FormA completes its work. This defeats the purpose of have two forms. IE. To allow the user to continue to work while one form is busy.

Is this not possible in C# .NET? It's easy enough to do in with a browser and child windows so I would think something as advanced as C# should be able to do the same.

Re: How do you change Focus between Forms

gshen24-Apr-07 13:07

gshen

24-Apr-07 13:07

Have you tried a function of Form class, Form.Focus()? If you call formA.Focus(), formA gets focus. If you call formB.Focus(), formB gets focus.

Sheng

Re: How do you change Focus between Forms

MarkSchultz25-Apr-07 5:38

MarkSchultz

25-Apr-07 5:38

Yes, I can use the Focus by using delegates. But I can not do a formA.Focus() from formB since formB is not aware of formA.

And when I do delegates, I can set the focus, however the focus is not taking place until after previous form completes it works...which in my case makes having two forms useless since the purpose is to allow the user to work on one form while the other form is being processed.

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