无法使用javascript和asp.net从AjaxFileUpload获取文件名

Question

I've tried solving this out and researching for weeks and i still can't get it to work. 我已经尝试解决此问题并进行了数周的研究，但仍然无法正常工作。 My code is to simply upload images and then save it in the database without postback. 我的代码是简单地上传图像，然后将其保存在数据库中而无需回发。

As of now, I used AjaxFileUpload to upload images. 到目前为止，我使用AjaxFileUpload上传图像。 My plan was to get the uploaded filename in AjaxFileUpload using javascript and then store it in a hiddenfield. 我的计划是使用javascript在AjaxFileUpload中获取上载的文件名，然后将其存储在hiddenfield中。 And then when the admin clicks submit, it will get the value that was stored in the hiddenfield and then save it in the database(using the query that i have created in my code-behind). 然后，当管理员单击“提交”时，它将获取存储在hiddenfield中的值，然后将其保存在数据库中（使用我在我的后台代码中创建的查询）。

The problem is, it will always return empty. 问题是，它将始终返回空。 I hope you guys can really help me on this one. 我希望你们真的可以帮我这个忙。

Here is the code for the aspx: 这是aspx的代码：

<%@ Page Language="C#" AutoEventWireup="true" 
CodeFile="CreateBrands.aspx.cs" Inherits="Pages_CreateBrands" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" 
TagPrefix="asp"%>  

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Music Store</title>
<script src="../Javascript/jquery-1.11.2.min.js"></script>
<link rel="stylesheet" href="~/Styles/jquery.bxslider.css"/>
<link rel="shortcut icon" type="image/png" href="~/Images/rockSign.png"/>
<script type="text/javascript">
    function abc() {
    var elem1 = document.getElementById('<%# itemFileUpload1.ID %>').value;
        document.getElementById('HiddenInput1') = elem1;
    var elem2 = document.getElementById('<%# itemFileUpload2.ID %>').value;
        document.getElementById('HiddenInput2') = elem2;
    }
</script>
</head>
<body>
<form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server">
                    </asp:ScriptManager>
     <div id="wrapper">

         <h1>Item Image1:</h2>
         <br />

         <asp:AjaxFileUpload ID="itemFileUpload1" runat="server"
         Width="300px" OnUploadComplete="itemUploadImage1"
         OnClientUploadComplete="abc"/>
       <input type="hidden" id="HiddenInput1" name="HiddenInput" value="" />

        <h1>Item Image2:</h2>
        <br />

        <asp:AjaxFileUpload ID="itemFileUpload2" runat="server" 
         Width="300px" OnUploadComplete="itemUploadImage2" 
        OnClientUploadComplete="abc"/>
       <input type="hidden" id="HiddenInput2" name="HiddenInput" value="" />
        <br/>

      <asp:Label ID="lblResult2" runat="server" Text=""></asp:Label>
        <br />

      <asp:Button ID="Button1" runat="server" CssClass="submitButton" 
      Text="Save Item" OnClick="Button1_Click"/>

    </div>
   </form>
 </body>
 </html>

And here is the code for the aspx.cs: 这是aspx.cs的代码：

  protected void itemUploadImage1(object sender, AjaxFileUploadEventArgs e)
{

        string filename = Path.GetFileName(e.FileName);
        itemFileUpload1.SaveAs(Server.MapPath("~/Images/Brands/String Instrument Items/Guitar/") + filename);
}

protected void itemUploadImage2(object sender, AjaxFileUploadEventArgs e)
{
        string filename = Path.GetFileName(e.FileName);
        itemFileUpload2.SaveAs(Server.MapPath("~/Images/Brands/String Instrument Items/Guitar/") + filename);

}

 protected void Button1_Click(object sender, EventArgs e)
 {
        try {

            string item_image1 = Request.Form["HiddenInput1"];
            string item_image2 = Request.Form["HiddenInput2"];

            ConnectionClassGuitarItems.AddStringInstrumentItems(item_image1,item_image2);

            lblResult2.Text = "Upload successful!" + item_image1 + " and " + item_image2;

            ClearTextFields2();
        }
        catch (Exception ex)
        {
            lblResult2.Text = ex.Message;
        }
}

Notice the the Button1_Click, I try to access the value of HiddenInput1 and HiddenInput2 but it seems like they are empty. 注意Button1_Click，我尝试访问HiddenInput1和HiddenInput2的值，但似乎它们是空的。

Answer 1

Why not use a regular asp:FileUpload control and wrap part of your form/code block in an updatepanel to achieve the same desired action as using a AjaxFileUpload control: 为什么不使用常规的asp：FileUpload控件并将表单/代码块的一部分包装在updatepanel中，以实现与使用AjaxFileUpload控件相同的所需操作：

<asp:UpdatePanel runat="server" UpdateMode="Always" ID="updPnlName">
 <ContentTemplate>
   <asp:FileUpload runat="server" ID="fileImport" CssClass="form-control"/>
 </ContentTemplate>
</asp:UpdatePanel>

Code Behind: 背后的代码：

    protected void btnUpload_OnClick(object sender, EventArgs e)
    {
        if (fileImport.HasFile)
        {
            UploadProcessFile();
        }
    }

    private void UploadProcessFile()
    {            
        var fileName = fileImport.FileName;
        //Process the rest of your code below you can also assign the file name to your textbox.
    }

Answer 2

You can get your image name like this on aspx file on 您可以在aspx文件上获得像这样的图像名称

 <asp:AjaxFileUpload ID="itemFileUpload2" runat="server" 
     Width="300px" OnUploadComplete="itemUploadImage2" 
    OnClientUploadComplete="abc"/>

use this script 使用这个脚本

    function abc(sender, args) {
           var Imagename = args.get_fileName();
         alert(Imagename );
       }

this way is very simple hope this help you 这样很简单，希望对您有帮助

无法使用javascript和asp.net从AjaxFileUpload获取文件名

问题描述

2 个解决方案

解决方案1
0 已采纳 2017-08-14 14:01:47

解决方案2
0 2017-08-14 14:07:44

无法使用javascript和asp.net从AjaxFileUpload获取文件名

问题描述

2 个解决方案

解决方案1 0 已采纳 2017-08-14 14:01:47

解决方案2 0 2017-08-14 14:07:44

解决方案1
0 已采纳 2017-08-14 14:01:47

解决方案2
0 2017-08-14 14:07:44