Question

如何在更新后删除物理旧图像

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Edit(Job job, HttpPostedFileBase jobimage)
{
    if (ModelState.IsValid)
    {
        System.IO.File.Delete(Path.Combine(Server.MapPath("~/Uploads"),job.JobImage));
        string path = Path.Combine(Server.MapPath("~/Uploads"), jobimage.FileName);
        jobimage.SaveAs(path);
        job.JobImage = jobimage.FileName;
        db.Entry(job).State = EntityState.Modified;
        db.SaveChanges();
        return RedirectToAction("Index");
    }
    ViewBag.CategoryId = new SelectList(db.Categories, "Id", "CategoryName", job.CategoryId);
    return View(job);
}

这一行：

System.IO.File.Delete（Path.Combine（使用Server.Mappath（ “〜/上传”），job.JobImage））;

没有任何帮助，谢谢你

Answer 1

文件删除采取字符串路径请查看示例代码

 // Delete a file by using File class static method...
        if(System.IO.File.Exists(@"C:\Users\Public\DeleteTest\test.txt"))
        {
            // Use a try block to catch IOExceptions, to
            // handle the case of the file already being
            // opened by another process.
            try
            {
                System.IO.File.Delete(@"C:\Users\Public\DeleteTest\test.txt");
            }
            catch (System.IO.IOException e)
            {
                Console.WriteLine(e.Message);
                return;
            }
        }

Answer 2

添加以下行：

@ Html.HiddenFor（model =＆gt; model.JobImage）

例如，

在您的视图中：

    @Html.ValidationSummary(true, "", new { @class = "text-danger" })
    @Html.HiddenFor(model => model.Id)
    @Html.HiddenFor(model => model.JobImage)

如何在ASP.Net MVC中删除旧图像

2 个答案: