如何在文本框中添加换行符

问题描述：

private void button1_Click(object sender, EventArgs e)
        {
            string a;
            a = textBox1.Text;
            textBox2.Text += a;
            textBox1.Clear();
        }

这就是我所写的问题是代码在上一行旁边的textbox1中写下一个输入，但我想写入下一行...........我该怎么做........请帮助..........

问候，

Ahsan Naveed

this is what i have written the problem is that the code writes the next input in textbox1 next to the previous line but i want to write it in the next line...........how do I do it........please help..........

Regards,
Ahsan Naveed

答

使用此：

Use this:

private void button1_Click(object sender, EventArgs e)
{
    string a;
    a = textBox1.Text;
    textBox2.Text += String.Format("{0}{1}", (String.IsNullOrEmpty(textBox2.Text)) ? "" : Enviroment.NewLine, a);
    textBox1.Clear();
}

这会在textbox1的附加文本前面添加换行符，但仅限于textbox2已经有一些非空文本了。

问候，

Manfred

This will put a newline in front of the appended text from textbox1, but only if textbox2 already had some non-empty text inside it.

Regards,

Manfred

除非将其设置为多行文本框（将其多行属性设置为true），否则不能。然后，只是在文本中添加换行符的情况：

You can't, unless it is set as a multiline textbox (Set it's Multiline property to "true"). Then, it's just a case of adding a newline to the text:

string a = textBox1.Text;
textBox2.Text += "\r\n" + a;
textBox1.Clear();

或者更好：

Or better:

textBox2.Text = string.Format("{0}\r\n{1}", textBox2.Text, textBox1.Text);
textBox1.Clear();

因为它生成的中间字符串较少。

Since it generates fewer intermediate strings.

如何在文本框中添加换行符

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