asp.net upload file hasfile always false

UploadStart - An event raised when the file upload starts.

UploadCompleteAll - An event handler that will be raised when the UploadComplete event is raised in all files in an upload queue, or when a user presses the Cancel button to stop uploading.

UploadComplete - An event raised when the file upload is complete.

SaveAs(fileName) - Saves the uploaded file with the specified file name.

UseAbsoluteHandlerPath - Whether or not to use absolute path for AjaxFileUploadHandler.

UploadHandlerPath - Upload handler path.

The throbber image is displayed for browsers that do not support the HTML5 File API or server-side polling.

ThrobberID - The ID of a control that is shown on the file upload.

ServerPollingSupport - Whether or not AjaxFileUpload supports server polling.

OnClientUploadStart - The name of a JavaScript function executed on the client side before any files are uploaded.

OnClientUploadError - The name of a JavaScript function executed on the client side if the file upload failed.

OnClientUploadCompleteAll - The client script that executes when all of files in queue uploaded, or when user hits Cancel button to stop uploading.

OnClientUploadComplete - The name of a JavaScript function executed on the client side after a file is uploaded successfully.

Mode - How AjaxFileUpload displays a progress bar.

Another very simple option to display progress during an async postback is to use the UpdateProgress control. Dans ce cas, ajouter du texte au fichier que vous voulez télécharger rendra la déclaration de propriété Hasfile vraie.

Que FileUpload.HasFile est également faux si vous téléchargez un fichier vide.

MaximumNumberOfFiles - A maximum number of files in an upload queue. Method 2: Using the UpdateProgress control to display progress in an ASP.NET AJAX application. jai aussi téléchargé un fichier en utilisant le contrôle FileUpload, mais la propriété HasFile a retourné false.

A non-positive value means the size is unlimited.

MaxFileSize - The maximum size of a file to be uploaded in Kbytes.

This can be used to avoid execution of unnecessary code during a partial postback.

IsInFileUploadPostBack - This will be true when a postback will be performed from the control.

ClearFileListAfterUpload - Whether or not to hide file upload list container after the uploading finished.

ChunkSize - The size of a chunk used by HTML5 to upload large files in bytes.

AutoStartUpload - Whether or not automatically start upload files after drag/drop or select in file dialog.

AllowedFileTypes - A comma-separated list of allowed file extensions.

Asp.net upload file hasfile always false