Re: RichTextBox find text - C# Discussion Boards

24-Apr-07 17:26

Im trying to implement a simple find text on a editor im working on.

On my find form, i have this button called "Find", here is the code for when you press it:

private void FindButton_Click(object sender, EventArgs e)
{
// Initialize the return value to false by default.
int returnValue = -1;

// Ensure that a search string has been specified and a valid start point.
if (FindTextBox.Text.Length > 0 && 0 >= 0)
{
// Obtain the location of the search string in richTextBox1.
int indexToText = EditingArea.Find(FindTextBox.Text, 0, RichTextBoxFinds.MatchCase);
// Determine whether the text was found in richTextBox1.
if (indexToText >= 0)
{
returnValue = indexToText;
}
}
}

But, when i try to build the solution, i keep getting these two error:

Error 1 (Warning - not major but i wanna get rid this stupid warning)

Solution_Name.Editor.ContextMenu' hides inherited member 'System.Windows.Forms.Control.ContextMenu'. Use the new keyword if hiding was intended. C:\Users\Admin\Documents\Visual Studio 2005\Projects\Solution_Name\Solution_name\Editor.Designer.cs

Error 2 - (Critical error, wont let me compile at all)

The name 'EditingArea' does not exist in the current context

The "EditingArea" is the name of the RichTextBox on the main form "Editor". The "Find" form is also on the same solution, same project. So, why can't it find it???

Adobe200724-Apr-07 17:38

24-Apr-07 17:38

I decided to add the namespace of the editor front of it like this:

Editor.EditingArea.Find(....

Now, I got this error:

Editor.EditingArea is inaccessible due to its protection level

So, i went back to my main form and made the RichTextBox (called Editor) and made the member "public" and tried to build again. Now im getting this error:

An object reference is required for the nonstatic field, method, or property

How do i fix this? Im i even doing the "Find Text" correctly?

Patrick Etc.24-Apr-07 18:02

Patrick Etc.

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

Adobe200724-Apr-07 18:13

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 ?

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

Adobe200724-Apr-07 18:38

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...

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

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.

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

Adobe200724-Apr-07 19:12

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[^]

BindingSource question, help me

Sathesh Sakthivel24-Apr-07 19:37

Sathesh Sakthivel

24-Apr-07 19:37

this article will help you in developing your application.

Regards,

Satips.

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

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

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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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

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

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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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

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

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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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