Dear SergeyC,

 

Client validation:

<script type="text/javascript">

function CuteWebUI_AjaxUploader_OnSelect(files) {

            var selectedSize = 0;
            for (var i = 0; i < files.length; i++) {
                selectedSize += files[i].FileSize;
            }
            //if selected files size is greater than this value, will stop the upload
            if (selectedSize > 1024 * 1024 * 1024) {
                   alert("the selected file size is "+ FormatSize(selectedSize)+",you only can upload 1G files");
                   return false;
            }
        }

</script>

 

Server side validation:

     void Uploader_FileUploaded(object sender, UploaderEventArgs args)
    {

          //validate the total size of uploaded files or validate the used space of destination folder    
    }   

 

Thank you for asking

Eric@cutesoft.net