由于母版页中的updatepanel，内容页中的asp FileUpload无法正常工作

Question

I have a master page where an update panel contains the main placeholder of the content pages.

Inside one of the content pages I need to disable the update panel in any way since I have a form with asp:fileupload control that is always returning null due to the update panel.

How can I overcome this issue?

Answer 1

将您的fileuploader和Submit按钮放置在另一个更新面板中，并为此更新面板添加一个回发触发器。

Answer 2

On page load of content page, try to get the update panel of master page using FindControl method and then attach your file upload as a post pack trigger to it dynamically. That may work

Answer 3

I've got a bad news for you.!

Have a look at this

http://ajax.asp.net/docs/overview/UpdatePanelOverview.aspx

The following ASP.NET controls are not compatible with partial-page updates, and are therefore not supported inside an UpdatePanel control:

TreeView and Menu controls.

Web Parts controls. For more information, see ASP.NET Web Parts Controls.

FileUpload controls when they are used to upload files as part of an asynchronous postback.

GridView and DetailsView controls when their EnableSortingAndPagingCallbacks property is set to true. The default is false.

Login, PasswordRecovery, ChangePassword, and CreateUserWizard controls

whose contents have not been converted to editable templates.

The Substitution control.

Validation controls, which includes the BaseCompareValidator, BaseValidator, CompareValidator, CustomValidator, RangeValidator, RegularExpressionValidator, RequiredFieldValidator, and ValidationSummary control.

Solution : You may want to use Ajax FileUpload using Jquery in place of update Panel. Remember, Open source is always a better option. :)