C# - Replace a character with nothing

I have a RichTextBox that looks like this:

TEXT  NEXT_TEXT  10.505   -174.994 0
TEXT  NEXT_TEXT  100.005  174.994  90 
TEXT  NEXT_TEXT  -10.000  -5.555   180
TEXT  NEXT_TEXT  -500.987 5.123    270
TEXT  NEXT_TEXT  987.123  1.000    180
TEXT  NEXT_TEXT  234.567  200.999  90

and I want to replace the "." with nothing and place it into a ListBox...

So the new file would look like this:

TEXT  NEXT_TEXT  10505   -174994 0
TEXT  NEXT_TEXT  100005  174994  90 
TEXT  NEXT_TEXT  -10000  -5555   180
TEXT  NEXT_TEXT  -500987 5123    270
TEXT  NEXT_TEXT  987123  1000    180
TEXT  NEXT_TEXT  234567  200999  90

I thought about multiplying the values by 1000 but I do not know how to properly do match calculations on a string.

So the next thought was to do this (HOWEVER THIS DOES NOT WORK):

  // Splits the lines in the rich text boxes
  strin开发者_运维技巧g[] listOneLines = oneRichTextBox.Text.Split('\n');

  // Set the selection mode to multiple and extended.
  placementOneListBox.SelectionMode = SelectionMode.MultiExtended;

  // Shutdown the painting of the ListBox as items are added.
  placementOneListBox.BeginUpdate();

  // Display the items in the listbox.
  foreach (var item in listOneLines)
  {
      item.Replace(".","");
      placementOneListBox.Items.Add(item);
  }

  // Allow the ListBox to repaint and display the new items.
  placementOneListBox.EndUpdate();

• Can anyone help me figure out how to replace a "."?

Strings are immutable so this line is wrong:

item.Replace(".","");

This returns the string after the replacement has been made, but item is unchanged. You need this:

foreach (var item in listOneLines)
    placementOneListBox.Items.Add(item.Replace(".",""));

string item2 = item.Replace(".", "");

You need to use the result of Replace, it doesn't operate on the string itself.

Instead of the "" use String.Empty. In this way there is no new object created.

Instead of:

item.Replace(".", "");

Try this:

item = item.Replace(".", ""); (edit: this was my original idea, but it's wrong)

placementOneListBox.Items.Add(item.Replace(".", ""));

Strings are immutable, so

item.Replace(".","")

does not modify item, but returns a new string.

You need to use:

placementOneListBox.Items.Add(item.Replace(".",""));

Edit: and as you can see from the flurry of simultaneous responses, many of our peers agree! ;-)

Replace your replace:

item.Replace(".","");

with this:

item = item.Replace(".","");

How about

// Splits the lines in the rich text boxes string[] listOneLines = oneRichTextBox.Text.Replace(".","").Split('\n');