javascript - 如何在 ASP.net MVC 3 中成功上传文件后显示警报

Question

现在我可以成功上传文件了……我现在要做的是在文件上传成功时显示一个警告框，否则显示错误/异常的警告……

这是我的看法:

using (Html.BeginForm("Upload", "Home", FormMethod.Post, new { @id = "File", enctype = "multipart/form-data"}))
        {
        <div class="control-group">                
            <input type="file" id="file" name="file" />
            <input type="submit" value="Upload" />
        </div>
        }

这是我的 Controller :

[HttpPost]   
public ActionResult Upload(HttpPostedFileBase file)
{
    try
    {
        //some code here for the upload....             

        /*In this part is my problem...Both Lines below is not showing the alert...*/
        //return new JavaScriptResult() { Script = "alert('The calendar XML file was uploaded successfully!');" };
        //return JavaScript("alert('The calendar XML file was uploaded successfully!');");
    }

    catch (Exception e)
    {   
        log.Error("HomeController::Upload()", e);
        return new JavaScriptResult() { Script = "alert(\"" + e.Message + "\");" };
    }
}

我想要的是我的 View 仍然存在...没有页面重定向...只是显示消息的警告框...谢谢!非常感谢任何想法，因为我知道不推荐我的这种方式......:)

Answer 1

这就是我从 Controller 获取警报所做的工作

查看代码如下:

@using (@Html.BeginForm("DoSomething","secure"))
{
    <input type="submit" value="get alert" />
}

Controller 代码如下:

[HttpPost]
        public ActionResult DoSomething()
        {
            string message = "hai";
            System.Text.StringBuilder sb = new System.Text.StringBuilder();
            sb.Append("<script type = 'text/javascript'>");
            sb.Append("window.onload=function(){");
            sb.Append("alert('");
            sb.Append(message);
            sb.Append("')};");
            sb.Append("</script>");
            //return Content("<script type='text/javascript'>alert('Hello there');</script>"); //You can get the alert with this line also
            return Content(sb.ToString(), "text/javascript");
        }

即使不需要脚本，点击get alert按钮也直接显示alert

希望对你有帮助