Class AjaxAttachments

Attachment-style upload control for forms that need a compact file list with remove support.

Inheritance
object
Control
WebControl
AjaxAttachments
UploadAttachments
Implements
Inherited Members
Namespace: AjaxUploader.Controls
Assembly: AjaxUploader.dll
Syntax
public class AjaxAttachments : WebControl, IComponent, IDisposable, IParserAccessor, IUrlResolutionService, IDataBindingsAccessor, IControlBuilderAccessor, IControlDesignerAccessor, IExpressionsAccessor, IAttributeAccessor, IPostBackDataHandler

Constructors

AjaxAttachments()

Initializes a new instance of the AjaxAttachments control.

Declaration
public AjaxAttachments()

Properties

ButtonText

Gets or sets the button text used to open the file picker.

Declaration
public string ButtonText { get; set; }
Property Value
Type Description
string

Extensions

Gets or sets the allowed file extensions as a comma-separated list.

Declaration
public string Extensions { get; set; }
Property Value
Type Description
string

MaxFiles

Gets or sets the maximum number of files that can be attached through the control.

Declaration
public int MaxFiles { get; set; }
Property Value
Type Description
int

MaxSize

Gets or sets the maximum allowed file size.

Declaration
public string MaxSize { get; set; }
Property Value
Type Description
string

OnClientChange

Gets or sets the JavaScript callback invoked when the attachment list changes. The callback receives the client attachment state after uploads, removals, or other list updates.

Declaration
public string OnClientChange { get; set; }
Property Value
Type Description
string

Removable

Gets or sets whether attached files can be removed from the client list.

Declaration
public bool Removable { get; set; }
Property Value
Type Description
bool

ShowSize

Gets or sets whether file sizes are shown in the attachment list.

Declaration
public bool ShowSize { get; set; }
Property Value
Type Description
bool

UploadUrl

Gets or sets a custom upload endpoint for attachment uploads. When left empty, the standard AjaxUploader handler upload endpoint is used.

Declaration
public string UploadUrl { get; set; }
Property Value
Type Description
string

UploadedFileGuids

Gets the uploaded file GUIDs restored from postback data. Use this list during page processing to associate attached files with the surrounding form data.

Declaration
[Browsable(false)]
public List<Guid> UploadedFileGuids { get; }
Property Value
Type Description
List<Guid>

Methods

LoadPostData(string, NameValueCollection)

Loads the hidden attachment GUID list from postback data. The values are written by the client attachment widget into the hidden field rendered by the control.

Declaration
public virtual bool LoadPostData(string postDataKey, NameValueCollection postCollection)
Parameters
Type Name Description
string postDataKey
NameValueCollection postCollection
Returns
Type Description
bool

OnPreRender(EventArgs)

Raises the PreRender event.

Declaration
protected override void OnPreRender(EventArgs e)
Parameters
Type Name Description
EventArgs e

An EventArgs object that contains the event data.
Overrides

RaisePostDataChangedEvent()

Raises post-data changed notifications for the attachment control. This implementation is intentionally empty; inspect UploadedFileGuids during page processing.

Declaration
public virtual void RaisePostDataChangedEvent()

Render(HtmlTextWriter)

Renders the control to the specified HTML writer.

Declaration
protected override void Render(HtmlTextWriter writer)
Parameters
Type Name Description
HtmlTextWriter writer

The HtmlTextWriter object that receives the control content.
Overrides

Implements