如何检查我的字符串是否以 <p> 并添加该文本（如果不在C＃中）

Question

If I have string named codeText. Sometimes that string starts with a <p> and other times not. Can anyone tell me how I can check if it starts with <p> and if it doesn't then how can I add the <p> to the start and </p> to the end.

Answer 1

if(!text.StartsWith("<p>"))
{
    text = string.Format("<p>{0}</p>", text);
}

Answer 2

Like this:

if (!text.StartsWith("<p>", StringComparison.OrdinalIgnoreCase))
    text = "<p>" + HttpUtility.HtmlEncode(text) + "</p>";

If you somehow know that the HTML string does not contain any malicious Javascript, you don't want to call HtmlEncode .

Answer 3

You mean like this?

if (!codeText.StartsWith("<p>"))
{
    codeText = string.Concat("<p>", codeText, "</p>");
}