[asp.net] Multiline TextBox multiple newline

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?

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>

Try this one

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

Working fine for me...

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

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";

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>

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.