How to Properly Escape Double Quotes in Strings for Display?-C++-php.cn

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How to Properly Escape Double Quotes in Strings for Display?

Mary-Kate Olsen

Jan 18, 2025 am 01:12 AM

How to Properly Escape Double Quotes in Strings for Display?

Cleverly handle double quotes in variable strings

In programming, it is often necessary to enclose the string stored in a variable in double quotes and display it in other strings. This article explores effective ways to achieve this goal.

Suppose you have a string variable title that is initially an empty string. To display its content inside a <div> element, you try concatenating double quotes and the variable like this: <pre class="brush:php;toolbar:false"><code>... ... <div>" + title + @""</div> ... ...</code></pre> <p>However, this approach results in the double quotes not being escaped, resulting in unexpected behavior. To display quotes correctly, they need to be escaped. </p> <h3 id="Escape-of-double-quotes">Escape of double quotes</h3> <p><strong>Use verbatim string literals:</strong></p> <p>One solution is to use a verbatim string literal, which starts with an @ symbol followed by a double quote. They allow special characters (including double quotes) to be used without escaping. </p> <pre class="brush:php;toolbar:false"><code>string str = @""""How to add doublequotes""""";</code></pre> <p><strong>Use standard string literals and escape sequences: </strong></p> <p>If you prefer standard string literals, you can escape double quotes using the backslash () character. </p> <pre class="brush:php;toolbar:false"><code>string str = "\""How to add doublequotes\""";</code></pre> <p><strong>Update: C# 11 native string literals</strong></p> <p>In C# 11 and later, you can use native string literals to simplify the process of embedding double quotes. They allow you to specify strings without escape sequences. </p> <pre class="brush:php;toolbar:false"><code>string str = """ "How to add doublequotes" """;</code></pre> <p>These methods allow you to successfully display strings containing double quotes in your code, ensuring accurate representation of the data. </p> </div>

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