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I set a value for a Multiline Textbox like this.

textBox1.Text = "Line1\r\n\r\nLine2";

But, only one line space in output.

When I read the value of textbox, I read "Line1\r\nLine2";

Why does ASP.NET not support more then one lineline character?

ag93
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selami
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7 Answers7

51

You need to set the textbox to be multiline, this can be done two ways:

In the control:

<asp:TextBox runat="server" ID="MyBox" TextMode="MultiLine" Rows="10" />

Code Behind:

MyBox.TextMode = TextBoxMode.MultiLine;
MyBox.Rows = 10;

This will render as a <textarea>

Tom Gullen
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    I set it to multiline. But, I cannot set programatically, multiple line space to the textbox. – selami May 06 '11 at 10:13
17
textBox1.Text = "Line1" + Environment.NewLine + "Line2";

Also the markup needs to include TextMode="MultiLine" (otherwise it shows text as one line)

<asp:TextBox ID="multitxt" runat="server" TextMode="MultiLine" ></asp:TextBox>
mas_oz2k1
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V4Vendetta
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  • which broswer are you using, i checked this in IE7 and FF works perfect. I hope you have typed the above thing properly ! – V4Vendetta May 06 '11 at 11:17
  • I check this with IE 8 and Google Chrome. Same result. – selami May 06 '11 at 11:27
  • The is no update panel. But, when I put the textbox in updatePanel and set the value of textbox when a submit button click, TextBox set correctly. You can try this on your development environment. Strange situation, maybe a bug. – selami May 06 '11 at 11:40
  • Actually, when page is postback, there is no problem. – selami May 06 '11 at 12:36
4

Try this one

textBox1.Text = "Line1" + Environment.NewLine + "Line2";

Working fine for me...

Harpal
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  • Yo can use multiple **Environment.NewLine** – Harpal Nov 03 '11 at 07:15
  • IE renders just one new line. try it. – selami Nov 03 '11 at 21:17
  • I'm using `txtMultiline.Text = "Line1" + Environment.NewLine + "Line2" + Environment.NewLine + "Line3";` and its working fine in all browsers – Harpal Oct 05 '12 at 06:43
  • Only one Environment.NewLine is OK, but multiple Environment.NewLine not working. For example; txtMultiline.Text = "Line1" + Environment.NewLine + Environment.NewLine + Environment.NewLine + "Line2"; – selami Oct 05 '12 at 08:13
  • I'm using `txtMultiline.Text = "Line1" + Environment.NewLine + Environment.NewLine + Environment.NewLine + Environment.NewLine + "Line2" + Environment.NewLine + "Line3";` and its working fine – Harpal Oct 09 '12 at 06:16
3

I had the same problem. If I add one Environment.Newline I get one new line in the textbox. But if I add two Environment.Newline I get one new line. In my web app I use a whitespace modul that removes all unnecessary white spaces. If i disable this module I get two new lines in my textbox. Hope that helps.

TimW
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2

When page IsPostback, the following code work correctly. But when page first loading, there is not multiple newline in the textarea. Bug

textBox1.Text = "Line1\r\n\r\n\r\nLine2";
Jesuraja
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aliye
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0

textBox1.Text = "Line1\r\r\Line2";
Solved the problem.

senthilkumar2185
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selami
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0

While dragging the TextBox it self Press F4 for Properties and under the Textmode set to Multiline, The representation of multiline to a text box is it can be sizable at 6 sides. And no need to include any newline characters for getting multiline. May be you set it multiline but you dint increased the size of the Textbox at design time.

Sai Kalyan Kumar Akshinthala
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