c# - ASP NET MVC 5 从服务器删除文件

Question

查看代码:

@if (File.Exists(Server.MapPath("~/Images/Cakes/" + Html.DisplayFor(modelItem => Model.CakeImage))))
    {
        @model TastyCakes.Models.Cakes
        <form name="deletePhoto" action="/Cakes/DeletePhoto" method="post">
        @Html.AntiForgeryToken()
        File name of image to delete (without .jpg extension):
        <input name="photoFileName" type="text" value="@Html.DisplayFor(modelItem => Model.CakeImage)" />
        <input type="submit" value="Delete" class="tiny button">
        </form>
    } else {
        <p>*File Needs to be uploaded</p>
}

Controller 代码:

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult DeletePhoto(string photoFileName)
{

    ViewBag.deleteSuccess = "false";
    var photoName = "";
        photoName = photoFileName;
    var fullPath = Server.MapPath("~/Images/Cakes/" + photoName);

        if (File.Exists(fullPath))
        {
            File.Delete(fullPath);
            ViewBag.deleteSuccess = "true";
        }
}

在它说 if (File.Exists) AND File.Delete 的地方，代码下面有波浪线。所以我想弄清楚删除 thif 文件需要什么语法。

这是我在 Controller 中的代码的屏幕截图:

更新:我已经让代码正常工作，并在我的博客上创建了一个简单的代码示例，说明我是如何让它工作的以及这个想法是如何产生的。 http://httpjunkie.com/2014/724/mvc-5-image-upload-delete/

Answer 1

使用Request.MapPath

string fullPath = Request.MapPath("~/Images/Cakes/" + photoName);
if (System.IO.File.Exists(fullPath))
{
   System.IO.File.Delete(fullPath);
}