Line Break in JavaScript alert and code-behind file

Line Break in JavaScript alert and code-behind file

The JavaScript alert() function is used to display messages to the users in a web page, in general the alert() function displays messages in a single line without line breaks, but there are instances where we want to add a line break to make the message look more appealing.

JavaScript alert () without a line break
alert("Please validate the data in the following fields Name, Age, Address, Phone and Email Address");

Output

JavaScript alert () with a line break
alert("Please validate the data in the following fields \n\nName \nAge \nAddress \nPhone \nEmail Address.");

Output

Ok, this works fine on the .aspx file, what if we want to display the message box dynamically from the code-behind .vb/.cs file.

This can be achieved by using a Response.Write statement with the <script> tag containing the alert function.

Response.Write("<script>alert('Please validate the data in the following fields \\n\\nName \\nAge \\nAddress \\nPhone \\nEmail Address.');</script>");

Note that in the .cs file we are using double slashes \\n instead of \n since .cs file takes the first slash as an escape sequence.