How can you trimend of textbox text from another textbox text

Question

I have two textbox's textbox1 (read/write) & textbox2 (read only), textbox1 is where you enter text at which point you press a button to pass that text into textbox2 (textbox2 continually concatenates the text from textbox1). I have a second button that I want to press to remove the text from textbox2 that is still in textbox1. Can anyone suggest how to do this?

I was thinking;

string one = textbox1.text;
string two = textbox2.text;
string newTwo = two.trimend( value of string 'one' needs to be removed );
textbox2.text = newTwo;

textbox1;
world

textbox2;
hello world

I know this sounds odd but it's a bit of a work around for an algebra calculator.

score 0 · Answer 1 · answered Oct 23 '14 at 05:45

0

you can do :

var start = two.IndexOf(one);
textbox2.text = two.Substring(start);

answered Oct 23 '14 at 05:45

Noctis

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score 0 · Answer 2 · answered Oct 23 '14 at 05:50

0

You can also use Replace method

string newTwo = two.Replace(one,"");

answered Oct 23 '14 at 05:50

jayvee

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2
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serdar · Accepted Answer · 2014-10-23T06:02:40.273

0

If (textbox2.Text.EndsWith(textbox1.Text))
    textbox2.Text = textbox2.Text.Substring(0, textbox2.Text.Length - textbox1.Text.Length);

edited Oct 23 '14 at 06:02

answered Oct 23 '14 at 05:56

serdar

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Cheers, didn't see that. I've always hovered my mouse over the up down arrows and it's told me my reputation isn't high enough. Just realised I could click the tick to accept the answer... – Kringle Oct 23 '14 at 06:38

score 0 · Answer 4 · answered Oct 23 '14 at 06:09

As far as i undestand your question boils down to "How to implement TrimEnd?". You can use code like this:

public static class StringExtensions
{
    public static string TrimEnd(this string str,
                                 string subject,
                                 StringComparison stringComparison)
    {
        var lastIndexOfSubject = str.LastIndexOf(subject, stringComparison);
        return (lastIndexOfSubject == -1
                || (str.Length - lastIndexOfSubject) > subject.Length)
            ? str
            : str.Substring(0, lastIndexOfSubject);
    }
}

Then is your code-behind:

textbox2.text = textbox2.text.TrimEnd(textbox1.text, StringComparison.CurrentCulture);

@serdar's implementation is much more better then mine :) – alpinsky Oct 23 '14 at 06:16 — alpinsky, Oct 23 '14 at 06:16

score 0 · Answer 5 · edited May 23 '17 at 12:20

0

@jayvee is right. Replacing with string.Empty would do.

But there's one problem with that:

When replacing "Hello" in "Hello World" the leading whitespace would remain. newTwo would be " World". You may also would want to replace multiple whitespaces via Regex as posted here and then Trim() the new string.

Also this is case sensitive.

edited May 23 '17 at 12:20

Community

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answered Oct 23 '14 at 06:14

The-First-Tiger

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How can you trimend of textbox text from another textbox text

5 Answers5