而用ajax无法获取上传的文件名

问题描述

我使用Ajax文件上传控件上载文件，它工作正常，但当IA复选框或单选按钮已自动回属性设置为true，我检查那么文件名返回null值

I am using Ajax file upload control to upload file in which it works fine but when i a check box or radiobutton which has autopostback property set to true and I check then the FileName returns value null

protected void AsyncFileUpload1_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e)
{
    try
    {
        if (AsyncFileUpload1.IsUploading)
        {
            AsyncFileUpload1.SaveAs(MapPath("~/Images/Accounts/" + AsyncFileUpload1.FileName));
        }
    }
    catch (Exception ex)
    {

    }
}

然后上传后的任何回发控件激发它只是返回null，视图状态也没有工作。

after uploading then any postback control fired it simply returns null and viewstate also not worked

推荐答案

使用视图状态，这将是通过使用回发所以首先值存储在一个JavaScript，然后按如下方式使用明确的服务器控件

use viewstate is a server control which will be clear by using postback so first store the value in a javascript and then use it as follows

的Java脚本方法：

 function OnClientAsyncFileUploadComplete(sender, args) {
                      __doPostBack('filename', args.get_fileName());

        }

        function saveLogo(ImageName) {
            __doPostBack('filename', args.get_fileName());
        }

在页面加载普莱舍把下面的code：

in page load plese put the following code:

在.CS

           if (IsPostBack)
            {

                string eventTarget = this.Request["__EVENTTARGET"];
                if (eventTarget == "filename")
                {
                    ViewState["EIName"] = this.Request["__EVENTARGUMENT"].ToString();
                }
            }

的ViewState [EIName]包含文件名

ViewState["EIName"] contains the file name

您可以使用任何地方在页面

you can use any where in the page

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