asp.net-mvc – 获取错误 – “@”字符后面的意外“if”关键字.一旦进入代码内部

参见英文答案 > Unexpected “foreach” keyword after “@” character                                    2个
我在视图中得到错误 – “”test1.cshtml“

“@”字符后面的意外“if”关键字.一旦进入代码,你就不需要像“if”这样的结构加前缀

test1.cshtml

@model WebApplication9.Models.Names


@using (Html.BeginForm())
{
    @Html.TextBoxFor(m => m.MyName)

    <button type="submit">Submit</button>

    if (!string.IsNullOrWhiteSpace(Model.MyName))
    {
        <p>welcome, your name is @Model.MyName</p>
    }
}

控制器代码

public ActionResult test1()
        {

            Names name = new Names();

            return View(name);

            ViewBag.Message = "Your contact page.";

            return View();
        }
        [HttpPost]
        public ActionResult test1(string name)
        {
            ViewBag.Message = "Hello what is ur name ???";
            ViewBag.Name = name;
            return View();
        }

型号代码

namespace WebApplication9.Models
{
    public class Names
    {
        public string MyName { get; set; }
    }
}

尝试：

@model WebApplication9.Models.Names


@using (Html.BeginForm())
{
    @Html.TextBoxFor(m => m.Name)

    <button type="submit">Submit</button>

    if (!string.IsNullOrWhiteSpace(Model.MyName))
    {
        <p>welcome, your name is @Model.MyName</p>
    }
}

由于你有@using,里面的Razor代码不需要@.但是,如果你有一个HTML元素,那么你需要使用@,就像欢迎文本一样.