We Keep Coding

how to remove a string in a line of Multiline textbox c#

i have the data bellow in my multiline textbox in my form
what i want is remove the " -" from that line, i wanna just to remove in that first line but without changing the rest of textbox values
what i have tried but without sucess
Textbox1.Lines[0] = Textbox1.Lines[0].Replace(" -", "");

According to the documentation for the Lines property:
Note
By default, the collection of lines is a read-only copy of the lines in the TextBox. To get a writable collection of lines, use code similar to the following: textBox1.Lines = new string[] { "abcd" };
So, it seems we need to assign it a whole new array, not just modify an existing array value. Something like this should do the trick:
var newLines = Textbox1.Lines; // Capture the read-only array locally
newLines[0] = newLines[0].Replace(" -", ""); // Now we can modify a value
Textbox1.Lines = newLines; // And reassign it to our textbox

C# Reading a file into an array of strings and printing it into a Textbox

I have a problem with my code as a described it a little bit in the title.
So the thing I want to do is to read a number from a file and printing it into a TextBox but the only thing I can get written there is System.String[].
And here is my code:
private void ladenToolStripMenuItem_Click(object sender, EventArgs e)
{
// Kontostand aus Datei auslesen und in variable speichern anschließend in tb schreiben
string[] Kontostand = File.ReadAllLines(pathkonto);
string tbkontostand = Kontostand.ToString();
this.lbKontostand.Text = "Kontostand: " + tbkontostand + "€";
string[] Log = File.ReadAllLines(pathlog);
string LoginTextbox = Log.ToString();
this.tbLog.Text = LoginTextbox;
}
Maybe i should say that my Kontostand is an label which i want to look like that:
Kontostand: 500 €
And my file where i want to read that out looks like that:
500
Thanks for helping me out :)
Timm

You didn't specify, but it appears you're using Winforms. If so, you should use this:
string[] Log = File.ReadAllLines(pathlog);
this.tbLog.Lines = Log;
The default behavior of the ToString() method is to just return the name of the type of the object. The string[] type does not override the default behavior, so that's what you're getting in the text box.
However, the Winforms TextBox class has a Lines property of type string[]. So you just need to set that directly to the string[] you get from reading the file.
In your original code, you also want to include in a Label file lines from a different source, which you can easily do like this:
string[] Kontostand = File.ReadAllLines(pathkonto);
this.lbKontostand.Text = "Kontostand: "
+ string.Join("", Kontostand)
+ "€";
The Label control doesn't have a Lines property, so in this particular case, you do need to use something like string.Join().
Since Label controls also don't have a multi-line mode, I simply concatenate the contents of the file with the empty string as the separator. There'd be no point in using Environment.NewLine here. You could of course use any string you want instead of "". It's up to you.
Now, from your edited question, it appears you may not need any sort of multi-line support at all, because the data you describe is just a single line. If this is in fact the case, your code can be quite a lot simpler (and more efficient):
private void ladenToolStripMenuItem_Click(object sender, EventArgs e)
{
this.lbKontostand.Text = "Kontostand: "
+ File.ReadAllText(pathkonto)
+ "€";
this.tbLog.Text = File.ReadAllText(pathlog);
}
For that matter, if you simply want to copy the file contents into the respective controls, that's the way to do it anyway. Reading the contents in an array, only to copy the entire contents of that array into the control, is less efficient than just reading all of the file text and assigning it to the Text property directly. New-line characters will be read into the string returned by ReadAllText(), so whether the file contents are really multi-line or not, the above should work better than what you were originally trying to do.

The first thing you need is to be sure that your TextBox has the Multiline property set to true and that you have sized its height enough to see more than one line.
Next, you don't apply the ToString to an array of strings. This just produces the class name because arrays don't have an override of that method and thus they call the base Object.ToString().
Instead you can use AppendText to add first the fixed text, then string.Join to render the lines of your file followed by the final currency symbol.
private void ladenToolStripMenuItem_Click(object sender, EventArgs e)
{
string[] Kontostand = File.ReadAllLines(pathkonto);
this.lbKontostand.AppendText("Kontostand: " + Environment.NewLine)
this.lbKontostand.AppendText(string.Join(Environment.NewLine,tbkontostand);
this.lbKontostand.AppendText(" €");
}

Log.ToString(); just call ToString method of a string[] type variable.
you need to loop all strings in your array
foreach(string s in Log)
this.tbLog.Text += s+"\n";

string LoginTextbox = string.Join("\r\n", Log);
use string.Join to get a comma separated string of all the values in the array.

Trackbar Percent to richtextbox Text

i have a Trackbar and want it to add the Current Value to a richtextbox Text without replacing the whole Text Line
richTextBox1.Rtf = richTextBox1.Rtf.Replace("aimbot_aimtime=85.000000", "aimbot_aimtime=" + trackbarpercent.Text + ".000000");
(i get the Value from my Label)
Thats what im using right now but it only Replaces it if the Text is "aimbot_aimtime=85.000000"
i want it to add the new Value after "aimbot_aimtime=NEWVALUE" but i cant get it to work atm

#Marc Lyon
I think a better way for me is to Replace the Line itself cause its always Line 7
Got it working, thanks to all who helped :)
void changeLine(RichTextBox RTB, int line, string text)
{
int s1 = RTB.GetFirstCharIndexFromLine(line);
int s2 = line < RTB.Lines.Count() - 1 ?
RTB.GetFirstCharIndexFromLine(line + 1) - 1 :
RTB.Text.Length;
RTB.Select(s1, s2 - s1);
RTB.SelectedText = text;
}
private void trackbarpercent_Click(object sender, EventArgs e)
{
changeLine(richTextBox1, 7, "aimbot_aimtime=" + aimtimetrackbar.Value + ".000000");
}

You have to know what the value is in order to replace it, which is why it only works when the value is your default value of 85.
In order to replace the text with the new text, you will have to track the previous value somewhere to use in your replacement. This means a field in your form, a property in some class. Let's say you create an int field on your form (myForm) called oldAimbot_aimtime. Every time the slider changes, put old value into this field. now your code becomes:
var prompt = "aimbot_aimtime=";
var oldvalue = string.Format("{0}{1}", prompt, myForm.oldAimbot_aimtime);
var newvalue = string.Format("{0}{1}", prompt, {NEWVALUE}.Format("#.######");
richTextBox1.Rtf = richTextBox1.Rtf.Replace(oldvalue, newvalue);
This code is off the top of my head and may not work exact, but it should replace the value. What is the value of using a richtextbox on a config screen? Can you post a screenshot?
OK, I see the screenshot. Ethics aside (not sure there is such a thing as a legit aimbot). You are using the richtextbox presumably because it was the easiest control for you to style...
Where you use the richtextbox is probably better suited to a GridView, ListBox, maybe even a treeview where you have finer control over each element.
If you want to use the richtext, write code which emits each option, then you can obtain exact values to use in rtf.Replace()commands
Hope this helps.

C# WinForms - Adding text to each line in a textbox

I am very new to C#. I learn best by experimentation, but of course, I will get completely stumped sometimes. I will try to explain my problem the best I can with what knowledge of the programming language I currently have.
I have been trying to create a simple tool to edit/add lines of text into a text file. I have done much researching, especially on this site, and all the information has been extremely helpful. My problem though, is adding text to both sides to a single line of text within a multi-line textbox.
So lets say I have a textbox with 2 existing lines; I want to add some text next to both sides of to one of one lines, and do the same to the next one. Here is an example of what the text would look like before and after a button is hit:
Before
is not the same as is different than
After
A is not the same as B A is different than B
The two lines in "Before" would be in textBox1 (multiline), and would be inserted to richTextBox1 as "After".
Hopefully I have explained it clearly enough, I do not know where to begin with this.
Thank you.

If you know which index you have to update the text, then you should be able to inset the value directly using insert function exposed by string class
Example:
//Get the text box value
var formatedTextboxString = this.textbox1.Text;
formatedTextboxString = formatedTextboxString.Insert(0, "A ");
formatedTextboxString = formatedTextboxString.Insert(21, "B");
//Place the formated text back to the richTextBox
this.richTextBox1.Text = formatedTextboxString;

Try
"{0} is not the same as {1} {2} is different than {3}"
In textbox1. Then use:
textbox2.Text = String.Format(textbox1.Text, A, B, A, B);

In case if you have multiline textbox:
var list = new List<string>(textBox1.Lines);
for (int i = 0; i < list.Count; ++i)
{
list[i] = "A" + list[i] + "B";
}
textBox1.Lines = list.ToArray();

string[] arr = textBox1.Text.Split(Environment.Newline);
//then loop over each line and add whatever you want :-
foreach (string s in arr)
{
//add here
}
I guess this is good enough hint to start with :)

How can I put text from a multi-line text box into one string?

I'm faced with a bit of an issue. The scenario is that I have a multi-line text box and I want to put all that text into one single string, without any new lines in it. This is what I have at the moment:
string[] values = tbxValueList.Text.Split('\n');
foreach (string value in values)
{
if (value != "" && value != " " && value != null && value != "|")
{
valueList += value;
}
}
The problem is that no matter what I try and what I do, there is always a new line (at least I think?) in my string, so instead of getting:
"valuevaluevalue"
I get:
"value
value
value".
I've even tried to replace with string.Replace and regex.Replace, but alas to no avail. Please advise.
Yours sincerely,
Kevin van Zanten

The new line needs to be "\r\n". Better still - use Environment.NewLine.
The code is inefficient though, you are creating numerous unnecessary strings and an unnecessary array. Simply use:
tbxValueList.Text.Replace(Environment.NewLine, String.Empty);
On another note, if you ever see yourself using the += operator on a string more than a couple of times then you should probably be using a StringBuilder. This is because strings are Immutable.

Note that new lines can be up to two characters depending on the platform.
You should replace both CR/carriage-return (ASCII 13) and LF/linefeed (ASCII 10).
I wouldn't rely on localized data as David suggests (unless that was your intention); what if you're getting the text string from a different environment, such as from a DB which came from a Windows client?
I'd use:
tbxValueList.Text.Replace((Char)13,"").Replace((Char)10,"");
That replaces all occurrences of both characters independent of order.

Try this
tbxValueList.Text.Replace(System.Environment.NewLine, "");

try this one as well
string[] values = tbxValueList.Text.Replace("\r\n", " ").Split(' ');