如何显示文件上传1没有选择文件的RFV消息？ [英] how to show the RFV message that file upload 1 have no file chosen ?

问题描述

我有一个文件上传控件和按钮点击文件上传按钮



但是如果没有选择文件那么我想给一条消息没有文件选择通过必填字段验证器

PLZ帮助



谢谢。

解决方案

< blockquote> Hi
U可以上传文件数或长度，如果文件长度为零，则当按钮点击事件显示消息时msg

 如果（FileUpload1.FileName.Length =  0 ）然后 
 ' 显示错误消息 
  Else  
 
 结束  IF  

问候

Aravind

根据您对所需现场验证器的要求：

这个林ks可以帮到你



如何在asp.net中验证FileUpload [ ^ ]

asp上的必需字段验证器：FileUpload控件 [ ^ ]

i have a file upload control and a button on button click file been uploaded

but if there are no file chosen then i want give a message "no file chosen" through required field validater
plz help

thank you.

解决方案

Hi U can get uploaded file count or length,if file length zero,then when button click event show msg

 If (FileUpload1.FileName.Length = 0) Then 
'Show error msg
Else

End IF

Regards
Aravind

As of your requirement of required field validator:
This links may help you

How to validate FileUpload in asp.net [^]
Required field validator on asp:FileUpload control[^]

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