Removing Specific Line Numbers From The Start Of TextBox

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Hi
So i was wondering how do you remove specific line number from the start of a multi line textbox from the start.

i know it would be something like this

C#

if (TextBox.Text.Equals(StringNumber/s))
{
  TextboxName.Text = "";
}

please help me get this code right :) thanks as always

edit: so a lot of lines has been imported in to a multi line textbox and what i am wanting is once the lines has been imported to remove x amount of lines from the stop of the textbox is that better? that is the code i have tried above.

Posted 11-May-13 4:56am

fatslice90

Updated 11-May-13 5:51am

v2

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OriginalGriff 11-May-13 11:09am

This is not a good question - we cannot work out from that little what you are trying to do.
Remember that we can't see your screen, access your HDD, or read your mind.
Perhaps if you give an example, rather than two unrelated lines of code?
Use the "Improve question" widget to edit your question and provide better information.

[no name] 11-May-13 11:11am

Yep... sure will be something like that. What is the actual code that you have tried? What is the input you are trying? What is the expected output? What is the actual output that you get?

[no name] 11-May-13 11:51am

updated the question

JMaxwell88 11-May-13 12:16pm

are you attempting to remove specific lines (separated by newline characters) or sets of substrings denoted by start-point and length?

[no name] 11-May-13 12:20pm

i am just attempting to remove specifc x amount of lines from the top of the text box which is a multi line text box :)

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JMaxwell88 · Answer 1 · 2013-05-13T09:06:00

C#

			// input string:..
			String testText = @"This 
is 
my 
test 
text 
string";

			// number of lines to take away from the result
			int toRemove = 2;

			// turn the input string into an array (split by newlines)
			List<string> testLines = new List<String>(testText.Split(new String[] { Environment.NewLine }, StringSplitOptions.None));		

			// counter for the number of lines already removed
			for (int lineNo = 0; lineNo < toRemove; lineNo++)
			{
				// remove the line in question
				testLines.RemoveAt(0);
			}

			// compund the result with newline character strings into one
			textBox1.Text = String.Join(Environment.NewLine, testLines.ToArray());

JMaxwell88 · Answer 2 · 2013-05-13T09:00:00

C#

// input string:..
			String testText = @"This 
is 
my 
test 
text 
string";

			// line indexes to take away from the result
			int[] toRemove = {2, 4};

			// turn the input string into an array (split by newlines)
			List<string> testLines = new List<String>(testText.Split(new String[] { Environment.NewLine }, StringSplitOptions.None));		

			// counter for the number of lines already removed
			int backpace = 0;			
			foreach(int lineNo in toRemove)
			{
				// realign the array index counter according to the number of lines so far removed
				int in_lineNo = lineNo - backpace;
		
				// remove the line in question
				testLines.RemoveAt(in_lineNo);

				// update the lines removed counter
				backpace++;
			}

Removing Specific Line Numbers From The Start Of TextBox

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