如何在Ajax工具包文件uploadcontrol中检查文件是否存在 [英] How to check file exist or not in Ajax toolkit file uploadcontrol

问题描述

大家好，

我先告诉你我的方案。我正在使用ajax toolkit文件上传控件，点击我的提交按钮我需要检查用户选择的文件是否上传如果没有，则给出错误消息。



我尝试过一种方式，一旦用户选择了文件，上传按钮的可见性即将到来，通过这种方式，我完成了但是现在我发现如果用户选择文件并删除了那个。此时上传按钮即将到来。所以我的验证失败了。



现在我想获取队列容器并循环遍历每个子元素并与该特定div中的remove按钮匹配。



请告诉我，我在做什么是对？并建议我实现这一目标的方法。

解决方案

你好，



你可以实现 OnClientUploadComplete 处理程序javascript函数。成功上载文件后，在客户端执行此功能。您还可以实现 OnClientUploadError 处理程序，如果文件上传出错，则会调用该处理程序。



更多信息控件可以在这里 [ ^ ]。



更新：您可以使用以下代码检索单个文件名。你如何调用它取决于你。

  var  ctrlId = ' <％= AjaxFileUpload1.ClientID％>'; 

（' span.filename'，' ＃' + ctrlId）.each（ function （）{
alert（

（ this ）。text（））;
}）;

问候，

Hi all,
Let me first tell you my scenario.I am using ajax toolkit file upload control and on click of my submit button i need to check whether the file selected by the user is uploaded or not and give a error message if not.

I tried a way that once the file is selected by user then upload button visibility is coming ,by that way i done that.but now i found if user select the file and removed that.at this point also the upload button is coming .So my validation got failed.

Now i thought of getting the queue container and loop through each and every child elements and match with the remove button in that particular div.

please tell me that ,what am i doing is right? and suggest me the way to achieve this.

解决方案

Hello,

You can implement OnClientUploadComplete handler javascript function. This function is executed on the client-side after a file is uploaded successfully. You can also implement OnClientUploadError handler which gets called if there is an error in file upload.

More info on the control can be found here[^].

Update: You can use following code to retrieve the individual file names. How do you invoke it is upto you.

var ctrlId = '<%= AjaxFileUpload1.ClientID %>';

('span.filename', '#' + ctrlId).each(function() { alert(

(this).text()); });

Regards,

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