Compairing two RichTextBox

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i have two richTextBoxes, one containing list of words and other whole text. i want to compare both textboxes and if word from list_of_word textbox found in whole_Text text box than copy that word to 3rd textbox.

Any help would be appreciated! thanks in advance friends. :)

Posted 20-Jan-15 6:04am

Asad_Iqbal

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Dave Kreskowiak 20-Jan-15 12:15pm

And what are you having a problem with?

No, we're not doing your homework for you.

Afzaal Ahmad Zeeshan 20-Jan-15 12:17pm

You can try to get the IndexOf each of the word in your first RichTextBox and then check for its value in the second RichTextBox, if the result is positive then the word exists. Append it to the third one.

Tip: Why are you even using the RichTextBox for such process? You should try ignoring using it, and try using TextBox itself.

ZurdoDev 20-Jan-15 12:27pm

Where are you stuck? The String object has a method Contains() that would be really easy to use here.

Sergey Alexandrovich Kryukov 20-Jan-15 12:44pm

Can you define "compare"? It is not as trivial as you may think.
And why RichTextBox?
—SA

BillWoodruff 20-Jan-15 12:46pm

WinForms ? , WPF ? Upper-case treated same as lower-case ?

4 solutions

Solution 1

This should help you - http://msdn.microsoft.com/en-us/library/ms754041%28v=vs.110%29.aspx[^].

Posted 20-Jan-15 6:40am

Abhinav S

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BillWoodruff 20-Jan-15 12:45pm

If the Op is using WPF.

Sergey Alexandrovich Kryukov 20-Jan-15 12:47pm

Essentially, it solves the major part of the problem. 5ed. I'm not sure inquirer understand clearly what "compare" means; it may be a problem, but let him define it first.
—SA

Abhinav S 20-Jan-15 16:14pm

Thank you SA.

Asad_Iqbal 21-Jan-15 8:27am

by means of comparing is: compairing two richtextbox's text and two find out the matching word and displaying it in 3rd TextBox

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BillWoodruff · Accepted Answer · 2015-01-20T07:27:00

Try this: (assume you want to show the difference in a third RichTextBox named 'richTextBox3):

C#

private char[] splitChars = new char[] 
{   
    ' ',    // space
    ',',    // comma
    ';',    // semi-colon
    ':',    // colon
    '\t',   // tab
    '\n',   // newline
    '\r',   // return
    '-',    // hyphen
    '!',    // exclamation 
    '/',    // slash
    '\\'    // backslash
};

private void FindDifference_Click()
{
    string[] words1 = richTextBox1.Text.ToLower().Split(splitChars, StringSplitOptions.RemoveEmptyEntries);

    string[] words2 = richTextBox2.Text.ToLower().Split(splitChars, StringSplitOptions.RemoveEmptyEntries);

    var difference = words1.Except(words2);

    richTextBox3.Clear();

    if (difference.Count() == 0)
    {
        richTextBox3.Text = "No difference.";
        return;
    }

    StringBuilder sb = new StringBuilder();

    foreach(var wrd in difference)
    {
       sb.Append(wrd);
       sb.AppendLine();
    }

    richTextBox3.Text = sb.ToString();
}

For production code I would want to use a compiled RegEx rather than String.Split.

jaket-cp · Accepted Answer · 2015-01-20T22:09:00

Solution 4

Linq can be used to help in comparing the strings.

C#

//test data setup (www.lipsum.com)
String[] ListOfWords = {"Duis","urna","enim","rhoncus","sit","amet","dignissim","ut","sollicitudin","at"};
String WholeText = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Mauris lacinia ex euismod lectus convallis lobortis. Integer vitae faucibus lectus, et molestie enim. Fusce condimentum sapien et felis iaculis volutpat. Nam vel mauris id velit consectetur pulvinar at et tellus. Fusce id lacus pretium, vehicula enim a, condimentum urna. Nam id erat est. Ut eu risus ultricies, dapibus leo quis, sollicitudin velit. Phasellus quis nulla ligula. Nam rhoncus leo vitae magna aliquet vulputate. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum faucibus ante nisi, a iaculis ipsum consectetur quis. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Ut sit amet lobortis eros. Nullam at lectus sit amet nibh congue tempor. Donec lobortis dapibus neque, at dapibus tortor vulputate sit amet.";

//populate FindWord with match
//note: comma, fullstops and the like are not taken into account when splitting WholeText into words
var FindWord = (from word in ListOfWords
	where WholeText.Split(' ').Contains(word)
//	where Array.Exists(WholeText.Split(' '), s => {return (s.Equals(word))?true:false;})
	select word
);

//OR
var FindWord = WholeText.Split(' ').Intersect(ListOfWords);

//get results
foreach (var s in FindWord){
	Console.WriteLine(s);
}

Enumerable.Intersect<tsource> Method: http://msdn.microsoft.com/en-us/library/vstudio/bb460136(v=vs.100).aspx[^]

Posted 20-Jan-15 22:09pm

jaket-cp

Comments

Asad_Iqbal 21-Jan-15 8:23am

String[] ListOfWords = {targetTextBox.Text};
String WholeText = richTextBox2.Text;
//populate FindWord with match
//note: comma, fullstops and the like are not taken into account when splitting WholeText into words
var FindWord = (from word in ListOfWords
where WholeText.Split(' ').Contains(word)
// where Array.Exists(WholeText.Split(' '), s => {return (s.Equals(word))?true:false;})
select word
);

//OR
FindWord = WholeText.Split(' ').Intersect(ListOfWords);

//get results
foreach (var s in FindWord)
{
textBox1.Text = s;
}

i tried this i didn't get any output.. where m i doing wrong???

jaket-cp 21-Jan-15 8:49am

Initially get the targetTextBox.Text value into a string array
Read the following to get up to speed on that one:
https://msdn.microsoft.com/en-gb/library/aa288453(v=vs.71).aspx
http://www.dotnetperls.com/string-array

Now when that is done, the value in richTextBox2.Text (whole text) needs to be split into separate words.
This can be done by using split(' '), but as I have noted this will only split/separate the words in the whole text by the ' ' (space).

Now when both are in a array string format the can be compared.
Populate FindWord with one of the two methods specified.

When FindWord is populated, loop through to populate textBox1.Text.
for example:
textBox1.Text = textBox1.Text + s

Hope that helps out.

Asad_Iqbal 21-Jan-15 9:02am

thanks for helping me out and clearing my concept regarding this..

i use below code..

String[] ListOfWords = {richTextBox2.Text};
String WholeText = targetListBox.Text;
//populate FindWord with match
//note: comma, fullstops and the like are not taken into account when splitting WholeText into words
var FindWord = (from word in ListOfWords
where WholeText.Split(' ').Contains(word)
//where Array.Exists(WholeText.Split(' '), s => {return (s.Equals(word))?true:false;})
select word);

textBox1.Text = textBox1.Text + FindWord.ToString();

and got this message in a textbox.

System.Linq.Enumerable+WhereArrayIterator`1[System.String]

where did i go wrong bro..

jaket-cp 21-Jan-15 10:29am

okay the line
String[] ListOfWords = {richTextBox2.Text};
is not probably not population with a list of words.
Have a look at solution 2 to see a way of populating String[] ListOfWords

The error is probably due to String[] ListOfWords not being populated as expected.

FindWord.ToString(); will probably not work.

Loop through the values in FindWord and create a string or stringbuilder and then populate textBox1, similar to how in solution 2.

Asad_Iqbal 21-Jan-15 12:04pm

String[] ListOfWords = {richTextBox2.Text};

this work fine as i use debugger to check weather it is populated or not... and i tried solution 2 and problem in solution 2 is that it never enter the foreach loop..

FindWord = WholeText.Split(' ').Intersect(ListOfWords);

//get results
foreach (var s in FindWord)
{
textBox1.Text = s;
}

jaket-cp 21-Jan-15 12:20pm

String[] ListOfWords = {richTextBox2.Text};
May be working in debugger, check the length of ListOfWords, it will probably be 1.
But a list of works need to be added to ListOfWords.

The code in solution 2 looks good, my solution only gives a linq example of how to compare the strings lists.

Okay what are the values of richTextBox2.Text and targetTextBox.Text?

What needs to be done is the value in richTextBox2.Text needs to be split up into separate words so they can be compared with the separate words in the whole text.
Have a read of the links I gave before to get an idea of how to do it.

Now the foreach, only the last match will be put into textBox1.Text with your implementation as the previous words will get over written.

In the loop you can do textBox1.Text = textBox1.Text + s, or use a stringbuilder as in solution 2 to append all the words together and then display in textBox1.Text

Let me know how that gets along...

Asad_Iqbal 22-Jan-15 7:17am

var FindWord = WholeText.Split(' ').Intersect(ListOfWords);

//get results
foreach (var s in FindWord)
{
textBox1.Text = textBox1.Text + s;
}

This works fine for a single word... but when it comes to a list of words that are separeted with space only, then it doesn't work. i think it consider whole text as a single word. any suggestion friend...??

jaket-cp 22-Jan-15 8:02am

Good you have figure that out :)

Now as I have mentioned you need to get the words split into String[] ListOfWords

You should be able to do this using the split as in solution 2.
As in my solution, the string array is being manually populated.

Read this to see how the split method works: https://msdn.microsoft.com/en-us/library/b873y76a(v=vs.110).aspx

So basically all the split is doing is splitting the long text into individual words, depending what is specified as the split parameter.

In my solution where I have used String WholeText for all the text.
The words are being split in this bit of code:
var FindWord = WholeText.Split(' ').Intersect(ListOfWords);.

Instead of splitting like that, it can be performed before hand like so:
String[] WholeTextWords = WholeText.Split(' ');.

And FindWord can be populated like so:
var FindWord = WholeTextWords.Intersect(ListOfWords);

Hope that is clear.

Asad_Iqbal 22-Jan-15 10:37am

i applied same concept on this..

String[] ListOfWords = richTextBox2.Text.Split(' ');

and it totally worked...
Thanks aloooooooootttttt my dear friend :) :) :)

jaket-cp 22-Jan-15 10:50am

That has put a smile on my face - good work. Glad you got there in the end :)

If you re-visit solution 2, the population of the string arrays should be similar to your final implementation.

Do spend time reading the extra links specified, so you may get a better understanding of split and other concepts works.

Happy coding!!

Asad_Iqbal 22-Jan-15 10:53am

Will surely Do friend.. Thanks for helping me out :)

jaket-cp 22-Jan-15 10:54am

no problem.

Asad_Iqbal · Accepted Answer · 2015-01-20T21:33:00

Solution 3

C#

            var regex = new Regex(richTextBox2.Text);
            List<string> matchingLines = new List<string>();
            foreach (var richtextItem in targetTextBox.ToString())// loop every item in your targetListBox
            {
                var texts = targetextBox.Text.ToString().Split(' ');
                foreach (var t in texts)
                {
                    if (regex.IsMatch(t))
                    {
                        matchingLines.Add(t.Trim());
                    }
                }
                break;
            }
            textBox1.Lines = matchingLines.ToArray();


</string></string>

so far this is what i did... but not getting any output..

Posted 20-Jan-15 21:33pm

Asad_Iqbal

Updated 21-Jan-15 1:43am

v2

Comments

BillWoodruff 21-Jan-15 4:26am

You have changed your question with this: your question asks about comparing Text in two RichTextBoxes: this example shows you using a ListBox. 'targetListbox.ToString makes no sense whatsoever if 'targetListBox is a real ListBox Control.

This should not be posted as a "solution:" your original question should be edited to include any changes, or updates.

Asad_Iqbal 21-Jan-15 7:44am

sorry it was a writing mistake. m still working with richtextboxes

BillWoodruff 21-Jan-15 9:51am

Don't worry you are in the company of people who make mistakes all the time :) The important thing is to edit your original post to keep it up-to-date.

Compairing two RichTextBox

4 solutions

Solution 2

Solution 4

Solution 1

Solution 3

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