Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / HtmlControls / HtmlInputFile.cs / 1 / HtmlInputFile.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* * HtmlInputFile.cs * * Copyright (c) 2000 Microsoft Corporation */ namespace System.Web.UI.HtmlControls { using System; using System.Collections; using System.Collections.Specialized; using System.ComponentModel; using System.Globalization; using System.Web; using System.Web.UI; using System.Security.Permissions; ////// [ ValidationProperty("Value") ] [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] public class HtmlInputFile : HtmlInputControl, IPostBackDataHandler { /* * Creates an intrinsic Html INPUT type=file control. */ ////// The ///class defines the /// methods, properties, and events for the control. This class allows /// programmatic access to the HTML <input type= file> element on the server. /// It provides access to the stream, as well as a useful SaveAs functionality /// provided by the /// property. /// /// This class only works if the /// HtmlForm.Enctype property is set to "multipart/form-data". /// Also, it does not maintain its /// state across multiple round trips between browser and server. If the user sets /// this value after a round trip, the value is lost. /// ////// public HtmlInputFile() : base("file") { } /* * Accept type property. */ ///Initializes a new instance of the ///class. /// [ WebCategory("Behavior"), DefaultValue(""), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden) ] public string Accept { get { string s = Attributes["accept"]; return((s != null) ? s : String.Empty); } set { Attributes["accept"] = MapStringAttributeToString(value); } } /* * The property for the maximum characters allowed. */ ////// Gets /// or sets a comma-separated list of MIME encodings that /// can be used to constrain the file types that the browser lets the user /// select. For example, to restrict the /// selection to images, the accept value image/* should be specified. /// ////// [ WebCategory("Behavior"), DefaultValue(""), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden) ] public int MaxLength { get { string s = Attributes["maxlength"]; return((s != null) ? Int32.Parse(s, CultureInfo.InvariantCulture) : -1); } set { Attributes["maxlength"] = MapIntegerAttributeToString(value); } } /* * PostedFile property. */ ////// Gets or sets the /// maximum length of the file path of the file to upload /// from the client machine. /// ////// [ WebCategory("Default"), DefaultValue(""), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden) ] public HttpPostedFile PostedFile { get { return Context.Request.Files[RenderedNameAttribute];} } /* * The property for the width in characters. */ ///Gets access to the uploaded file specified by a client. ////// [ WebCategory("Appearance"), DefaultValue(-1), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden) ] public int Size { get { string s = Attributes["size"]; return((s != null) ? Int32.Parse(s, CultureInfo.InvariantCulture) : -1); } set { Attributes["size"] = MapIntegerAttributeToString(value); } } // ASURT 122262 : The value property isn't submitted back to us when the a page // containing this control postsback, so required field validators are broken // (value would contain the empty string). To fix this, we return the filename. [ Browsable(false) ] public override string Value { get { HttpPostedFile postedFile = PostedFile; if (postedFile != null) { return postedFile.FileName; } return String.Empty; } set { // Throw here because setting the value on this tag has no effect on the // rendering behavior and since we're always returning the posted file's // filename, we don't want to get into a situation where the user // sets a value and does not get back that value. throw new NotSupportedException(SR.GetString(SR.Value_Set_Not_Supported, this.GetType().Name)); } } /* * Method of IPostBackDataHandler interface to process posted data. */ ///Gets or sets the width of the file-path text box that the /// browser displays when the ////// control is used on a page. bool IPostBackDataHandler.LoadPostData(string postDataKey, NameValueCollection postCollection) { return LoadPostData(postDataKey, postCollection); } protected virtual bool LoadPostData(string postDataKey, NameValueCollection postCollection) { return false; } /* * Method of IPostBackDataHandler interface which is invoked whenever * posted data for a control has changed. RadioButton fires an * OnServerChange event. */ /// void IPostBackDataHandler.RaisePostDataChangedEvent() { RaisePostDataChangedEvent(); } protected virtual void RaisePostDataChangedEvent() { } /// /// protected internal override void OnPreRender(EventArgs e) { base.OnPreRender(e); // ASURT 35328: use multipart encoding if no encoding is currently specified HtmlForm form = Page.Form; if (form != null && form.Enctype.Length == 0) { form.Enctype = "multipart/form-data"; } } } }Raises the ///event. This method uses event arguments /// to pass the event data to the control.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- DbExpressionVisitor.cs
- ConnectionManagementElementCollection.cs
- RootBrowserWindow.cs
- CompositeDispatchFormatter.cs
- CollectionContainer.cs
- RewritingValidator.cs
- ListViewDataItem.cs
- EventLogTraceListener.cs
- PackageProperties.cs
- ConfigurationValues.cs
- ExtendedPropertyDescriptor.cs
- QilTypeChecker.cs
- IDictionary.cs
- DbDataSourceEnumerator.cs
- ContainerVisual.cs
- XmlSchemaSearchPattern.cs
- PerfCounters.cs
- ResXResourceReader.cs
- AttachedPropertyMethodSelector.cs
- TopClause.cs
- KeyValueInternalCollection.cs
- IpcManager.cs
- XmlChildEnumerator.cs
- UIElementParagraph.cs
- Cursors.cs
- RuntimeCompatibilityAttribute.cs
- Suspend.cs
- InlineCollection.cs
- BrushMappingModeValidation.cs
- FixedElement.cs
- IPGlobalProperties.cs
- SplayTreeNode.cs
- IRCollection.cs
- BamlRecordReader.cs
- PrintPreviewDialog.cs
- IChannel.cs
- Variant.cs
- RequestCacheManager.cs
- HttpRawResponse.cs
- SqlCacheDependency.cs
- SynchronizationLockException.cs
- DiagnosticsConfigurationHandler.cs
- SecurityRuntime.cs
- MenuItemStyleCollection.cs
- log.cs
- InsufficientMemoryException.cs
- TreeNodeCollection.cs
- HttpCapabilitiesSectionHandler.cs
- SetterBase.cs
- ContourSegment.cs
- MeshGeometry3D.cs
- ListSortDescriptionCollection.cs
- XslVisitor.cs
- formatter.cs
- Exceptions.cs
- Misc.cs
- WriteableBitmap.cs
- BitmapEffectCollection.cs
- LogEntrySerialization.cs
- ValidationHelper.cs
- ExpressionPrefixAttribute.cs
- JavaScriptSerializer.cs
- DataControlFieldsEditor.cs
- MenuItem.cs
- FixedPageProcessor.cs
- DesignerActionPropertyItem.cs
- Calendar.cs
- X509SecurityTokenProvider.cs
- WeakEventTable.cs
- InstanceCreationEditor.cs
- HwndKeyboardInputProvider.cs
- AspProxy.cs
- SessionPageStateSection.cs
- OdbcConnectionHandle.cs
- IDReferencePropertyAttribute.cs
- TracedNativeMethods.cs
- BamlResourceSerializer.cs
- XPathNavigatorKeyComparer.cs
- BufferAllocator.cs
- SaveFileDialog.cs
- FormViewUpdateEventArgs.cs
- TabControl.cs
- QualifiedCellIdBoolean.cs
- ProbeMatchesApril2005.cs
- DelimitedListTraceListener.cs
- StreamGeometryContext.cs
- WizardStepCollectionEditor.cs
- LineServicesCallbacks.cs
- ContextQuery.cs
- SqlVisitor.cs
- DefaultValueAttribute.cs
- UriParserTemplates.cs
- ConnectionStringSettings.cs
- FlowLayoutSettings.cs
- NavigatorOutput.cs
- ScrollContentPresenter.cs
- CodePrimitiveExpression.cs
- smtpconnection.cs
- SmiConnection.cs
- XmlAttributeCollection.cs