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>
}

控制器代码:

[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";
        }
}

如果它表示if(File.Exists)和File.Delete,则代码下面有波浪线.所以我想弄清楚我需要什么语法来删除thif文件.

这是我在控制器中的代码的屏幕截图:

UPPDATE:我已经有了代码工作,并在我的博客上创建了一个简单的代码示例,说明了我是如何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);
}

Answer 2

File当你使用它时,它是模棱两可的,因此是"波浪线".IDE无法解析您的意思;

System.Web.Mvc.Controller.File()

要么

System.IO.File

尝试在MVC控制器中使用File API时,请使用完全限定名称.

Answer 3

感谢@Damith的回答

我创建了这个功能

private bool RemoveFileFromServer(string path)
{
    var fullPath = Request.MapPath(path);
    if (!System.IO.File.Exists(fullPath)) return false;

    try //Maybe error could happen like Access denied or Presses Already User used
    {
        System.IO.File.Delete(fullPath);
        return true;
    }
    catch (Exception e)
    { 
        //Debug.WriteLine(e.Message);
    }
    return false;
}

这是它的简单用法

RemoveFileFromServer("Content\img\ProfilePictures\User12.png");