c# How to read and write from multiline textBox line by line?

Question

I have a simple program it has a function to read a line from multiline textBox when i press a button what i made to do that is this code :

TextReader read = new System.IO.StringReader(textBox1.Text);
int rows = 100;

string[] text1 = new string[rows];
for (int r = 1; r < rows; r++)
{
    text1[r] = read.ReadLine();
}

so when click button1 it the code will be like this:

textBox2=text1[1];

[1] mean the first line How can i do it automaticaly by one click ? or with one click the first line to textBox2 the second to textBox3 .....ect..

plz i want the code and where i should put it ^_^

or if there is another way to do that

Steve · Accepted Answer · 2020-10-13T06:44:50.287

30

The property Lines is there for you

if(textBox1.Lines.Length > 0)
    textBox2.Text=textBox1.Lines[0];

or, put your textboxes ordered in a temporary array and loop on them (of course we should always check the number of lines present in textBox1)

TextBox[] text = new TextBox[] {textBox2, textBox3, textBox4};
if(textBox.Lines.Length >= 3)
{
    for(int x = 0; x < 3; x++) 
       text[x] = textBox1.Lines[x];
}

edited Oct 13 '20 at 06:44

answered Oct 18 '12 at 14:46

Steve

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...and TextBox.Lines is a string[], so it is an exact replacement for the text1 variable in the original post. – Polyfun Oct 18 '12 at 14:52
a want to do a loop for [1] [2] [3] string how can i do it – Manar Al Saleh Oct 18 '12 at 16:39
2

Note: Textbox.lines is only available for Windows Forms (not webforms) – Douglas Timms Sep 16 '16 at 20:18

score 10 · Answer 2 · edited Apr 09 '18 at 19:26

Simple programming read and write a one-by-one line from multiline textBox in C#

Write line one-by-one:

textbox1.AppendText("11111111+");
textbox1.AppendText("\r\n222222222");
textbox1.AppendText("\r\n333333333");
textbox1.AppendText("\r\n444444444");
textbox1.AppendText("\r\n555555555");

Read line one-by-one:

for (int i = 0; i < textbox1.Lines.Length; i++)
{
    textbox2.Text += textbox1.Lines[i] + "\r\n";
}

score 1 · Answer 3 · answered Jun 10 '15 at 13:11

You can use following snippet for reading comma separated and newline separated values from multiline textbox -

 if (!string.IsNullOrEmpty(Convert.ToString(txtBoxId.Text)))
        {
            string IdOrder = Convert.ToString(txtBoxId.Text.Trim());

            //replacing "enter" i.e. "\n" by ","
            string temp = IdOrder.Replace("\r\n", ",");            

            string[] ArrIdOrders = Regex.Split(temp, ",");

            for (int i = 0; i < ArrIdOrders.Length; i++)
            {
              //your code
            }
         }

I Hope this would help you.

c# How to read and write from multiline textBox line by line?

3 Answers3