简单教程
提交运行
代码编辑器：
@{ var imagePath=""; if (Request["Choice"] != null) {imagePath="images/" + Request["Choice"];} } <!DOCTYPE html> <meta charset="utf-8" /> <h1>Display Images</h1> <form method="post" action=""> I want to see: <select name="Choice"> <option value="Photo1.jpg">Photo 1</option> <option value="Photo2.jpg">Photo 2</option> <option value="Photo3.jpg">Photo 3</option> </select> <input type="submit" value="Submit" /> @if (imagePath != "") {<p><img src="@imagePath" alt="Sample" /></p>} </form>
运行结果：