我有我的頁面上的asp文件上傳控件。如何在客戶端驗證選定的文件。驗證規則: 1.文件必須是jpeg,png,bmp或gif 2.文件大小必須在25 kb和2 MB以內。 請幫忙。 謝謝。
我曾嘗試下面的代碼來驗證擴展驗證asp文件上傳控制客戶端端
<asp:FileUpload ID="FileUpload2" runat="server"/>
<asp:CustomValidator ID="CustomValidator1" runat="server" ClientValidationFunction="ValidateFileUpload" ErrorMessage="Invalid file type. Only .gif, .jpg, .png, .bmp and .jpeg are allowed." ControlToValidate="FileUpload2" ValidationGroup="update"> </asp:CustomValidator>
<script language="javascript" type="text/javascript">
function ValidateFileUpload(Source, args) {
var fuData = document.getElementById('<%= fuData.ClientID %>');
var FileUploadPath = fuData.value;
if (FileUploadPath == '') {
// There is no file selected
args.IsValid = false;
}
else {
var Extension = FileUploadPath.substring(FileUploadPath.lastIndexOf('.') + 1).toLowerCase();
if (Extension == "jpg" || Extension == "jpeg" || Extension == "png" || Extension == "gif" || Extension == "bmp") {
args.IsValid = true; // Valid file type
}
else {
args.IsValid = false; // Not valid file type
}
}
}
</script>
我已經編輯我的職務與我的代碼。請拜訪。 – 2012-04-06 16:27:59
有關文件類型驗證,請參閱鏈接:http://www.aspsnippets.com/Articles/ASPNet-FileUpload-File-Extension-Validation.aspx – Vijjendra 2014-01-08 11:10:47