Textbox multiline printing only last item [closed]

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Textbox multiline printing only last item [closed]

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#1 by (0 votes)
#2 by (-1 votes)

-1

I'm using TextBoxt Multiline to do the "issuing" of the report on the system itself. When printing, however, the following message appears: "System.Windows.Forms.TextBox" and then the given.

public Formulário()
{
    InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
    using (StreamReader ler = new StreamReader(@"escrevesaida.txt"))
    {
        string leitor;

        while ((leitor = ler.ReadLine()) != null)
        {
            textBox1.AppendText($"{leitor}{Environment.NewLine}");
        }
    }
}

c# winforms

asked by anonymous 03.08.2018 / 13:35

2 answers

0

The problem is that in Text of textBox , for each line it reads you are assigning the value, replacing the value you had previously.

textBox1.Text = leitor;

Correct would be to concatenate, that is, to join the results of each line. As follows:

textBox1.Text += leitor;

03.08.2018 / 13:39

update from the license plate code of a vehicle Time between two dates [duplicate]

score -1 · Accepted Answer

If the goal is to separate line by line, the best way is:

string leitor;

while ((leitor = ler.ReadLine()) != null)
{
    textBox1.AppendText($"{leitor}{Environment.NewLine}");
}

Placing the following code before while :

leitor = ler.ReadLine();
textBox1.Text = leitor;

I was picking up the first line and then the rest. You can put everything into the loop.

Regarding the text System.Windows.Forms.TextBox, Text: 123 , in fact, as ThiagoMagalhães mentioned, it seems to originate in textBox1.Text += textBox1; or something of the sort. Unless this already comes from the file ...