C# - Replace part of string from ListBox with RichTextbox Data

I have a listBox labeled placementTwoListBox where I have data loaded into it. The placementTwoListBox looks like this:

placementTwoListBox:

U3      IC-00276G   236.135  198.644  90   
U12     IC-00270G   250.610  201.594  0    
J1      INT-00112G  269.665  179.894  180  
J2      INT-00112G  269.665  198.144  180  
J6      INT-00113G  227.905  174.994  180  
J3      INT-00113G  227.905  203.244  180  
U13     EXCLUDES    242.210  181.294  180  

I also have TWO richTextBoxes labeled calculatedXRichTextBox and calculatedYRichTextBox. They look li开发者_StackOverflow社区ke this:

calculatedXRichTextBox:

246.135
260.610
279.665
279.665
237.905
237.905
252.210

calculatedYRichTextBox:

298.644
301.594
279.894
298.144
274.994
303.244
281.294

I am trying to replace the values in the 3rd column of placementTwoListBox with the values in calculatedXRichTextBox and replace the values in the 4th column of placementTwoListBox with the values in calculatedYRichTextBox to get the final result (and placing it back into the original ListBox) of:

placementTwoListBox (updated):

U3      IC-00276G   246.135  298.644  90   
U12     IC-00270G   260.610  301.594  0    
J1      INT-00112G  279.665  279.894  180  
J2      INT-00112G  279.665  298.144  180  
J6      INT-00113G  237.905  274.994  180  
J3      INT-00113G  237.905  303.244  180  
U13     EXCLUDES    252.210  281.294  180  

• Does anyone know how to implement this?

EDIT:

When using these two: @CrazyDart

calculatedXRichTextBox:

758.135
772.61
791.665
791.665
749.905
749.905
764.21

calculatedYRichTextBox:

-301.356
-298.406
-320.106
-301.856
-325.006
-296.756
-318.706

The placementTwoListBox turns out to look like this:

U3      IC-00276G   758.135  -301.356666666  90   
U12     IC-00270G    772.61  -298.40666666  0    
J1      INT-00112G  791.665  -320.1066666  180  
J2      INT-00112G  791.665  -301.856666  180  
J6      INT-00113G  749.905  -325.00666  180  
J3      INT-00113G  749.905  -296.7566  180  
U13     EXCLUDES     764.21  -318.706  180  

This should get you started:

        string[] lines = placementTwoListBox.Lines;
        for (int line = 0; line < lines.Length; line++)
        {
            string replacement1 = calculatedXRichTextBox.Lines[line];
            while (replacement1.Length < 7)
            {
                replacement1 = " " + replacement1;
            }
            lines[line] = lines[line].Remove(20, 7).Insert(20, replacement1);

            string replacement2 = calculatedYRichTextBox.Lines[line];
            while (replacement2.Length < 7)
            {
                replacement2 = " " + replacement2;
            }
            lines[line] = lines[line].Remove(29, 7).Insert(29, replacement1);
        }
        placementTwoListBox.Lines = lines;

UPDATE: I totally missed that some are lists, not all RichTextBoxes... see updated code:

    for (int line = 0; line < placementTwoListBox.Items.Count; line++)
    {
        string replacement1 = calculatedXRichTextBox.Lines[line];
        while (replacement1.Length < 7)
        {
            replacement1 = " " + replacement1;
        }
        placementTwoListBox.Items[line] = ((string)placementTwoListBox.Items[line]).Remove(20, 7).Insert(20, replacement1);

        string replacement2 = calculatedYRichTextBox.Lines[line];
        while (replacement2.Length < 7)
        {
            replacement2 = " " + replacement2;
        }
        placementTwoListBox.Items[line] = ((string)placementTwoListBox.Items[line]).Remove(29, 7).Insert(29, replacement1);
    }

This code is to fill the calculatedXRichTextBox and calculatedYRichTextBox from the placementTwoListBox:

string[] lines = new string[placementTwoListBox.Items.Count];

for (int itemIndex = 0; itemIndex < lines.Length; itemIndex++)
{ 
    lines[itemIndex] = placementTwoListBox.Items[itemIndex].ToString();
}

List<string> calculatedXLines = new List<string>();//to fill calculatedXRichTextBox
List<string> calculatedYLines = new List<string>();//to fill calculatedYRichTextBox

foreach (string line in lines)
{
    string[] items = line.Split(new string[] { "\t", " " }, 
        StringSplitOptions.RemoveEmptyEntires);

    if (items.Length > 2)
    {
        calculatedXLines.Add(items[2]);
        calculatedYLines.Add(items[3]);
    }
}

//add them to the calculatedYRichTextBox and the placementTwoListBox
calculatedXRichTextBox.Text = string.Join("\n", calculatedXLines); 
calculatedYRichTextBox.Text = string.Join("\n", calculatedYLines); 

Edit: Answering the question:

string[] calculatedXLines = calculatedXRichTextBox.Text.Split(new string[] { "\n", "\r" },

StringSplitOptions.RemoveEmptyEntries);

string[] calculatedYLines = calculatedYRichTextBox.Text.Split(new string[] { "\n", "\r" },
    StringSplitOptions.RemoveEmptyEntries);

string[] lines = new string[placementTwoListBox.Items.Count];

for (int itemIndex = 0; itemIndex < lines.Length; itemIndex++)
{ 
    lines[itemIndex] = placementTwoListBox.Items[itemIndex].ToString();
}

List<string[]> newLines = new List<string[]>();

for (int lineIndex = 0; lineIndex < lines.Length; lineIndex++)
{
    string[] items = lines[lineIndex].Split(new string[] { " ", "\t" },
        StringSplitOptions.RemoveEmptyEntries);

    items[2] = calculatedXLines[lineIndex];
    items[3] = calculatedYLines[lineIndex];

    newLines.Add(items);
}

//represents your data on the `placementTwoListBox`:
placementTwoListBox.Items.Clear();
foreach (string[] lineItems in newLines)
{
    placementTwoListBox.Items.Add(string.Join("\t", lineItems));
}