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fileupload控件 文件类型客户端验证实现代码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>无标题页</title> <img src="/_New/_cj/myeditor/sysimage/space.gif" class="ewebeditor__script" _ewebeditor_fake_tag="script" _ewebeditor_fake_value="%3Cscript%20type%3D%22text%2Fjavascript%22%20language%3D%22javascript%22%3E%20%0D%0Afunction%20CheckFileType()%20%0D%0A%7B%20%0D%0Avar%20objButton%3Ddocument.getElementById(%22Button1%22)%3B%2F%2F%E4%B8%8A%E4%BC%A0%E6%8C%89%E9%92%AE%20%0D%0Avar%20objFileUpload%3Ddocument.getElementById('FileUpload1')%3B%2F%2FFileUpload%20%0D%0Avar%20objMSG%3Ddocument.getElementById('msg')%3B%2F%2F%E6%98%BE%E7%A4%BA%E6%8F%90%E7%A4%BA%E4%BF%A1%E6%81%AF%E7%94%A8%E7%9A%84DIV%20%0D%0Avar%20FileName%3Dnew%20String(objFileUpload.value)%3B%2F%2F%E6%96%87%E4%BB%B6%E5%90%8D%20%0D%0Avar%20extension%3Dnew%20String%20(FileName.substring(FileName.lastIndexOf(%22.%22)%2B1%2CFileName.length))%3B%2F%2F%E6%96%87%E4%BB%B6%E6%89%A9%E5%B1%95%E5%90%8D%20%0D%0Aif(extension%3D%3D%22jpg%22%7C%7Cextension%3D%3D%22JPG%22)%2F%2F%E4%BD%A0%E5%8F%AF%E4%BB%A5%E6%B7%BB%E5%8A%A0%E6%89%A9%E5%B1%95%E5%90%8D%20%0D%0A%7B%20%0D%0AobjButton.disabled%3Dfalse%3B%2F%2F%E5%90%AF%E7%94%A8%E4%B8%8A%E4%BC%A0%E6%8C%89%E9%92%AE%20%0D%0AobjMSG.innerHTML%3D%22%22%3B%20%0D%0A%7D%20%0D%0Aelse%20%0D%0A%7B%20%0D%0AobjButton.disabled%3Dtrue%3B%2F%2F%E7%A6%81%E7%94%A8%E4%B8%8A%E4%BC%A0%E6%8C%89%E9%92%AE%20%0D%0AobjMSG.innerHTML%3D%22%E8%AF%B7%E9%80%89%E6%8B%A9%E6%AD%A3%E7%A1%AE%E7%9A%84%E6%96%87%E4%BB%B6%E6%96%87%E4%BB%B6%22%3B%20%0D%0A%7D%20%0D%0A%7D%20%0D%0A%3C%2Fscript%3E"> </head> <body> <form id="form1" runat="server"> <div> <div id="msg"></div> <asp:Button ID="Button1" runat="server" Text="上传" Enabled="False" /> <asp:FileUpload ID="FileUpload1" runat="server" onChange="javascript:CheckFileType();" /> </div> </form> </body> </html>
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