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
- QueryConverter.cs
- TableColumn.cs
- ProcessModuleDesigner.cs
- x509utils.cs
- InvalidWMPVersionException.cs
- DataGridViewCellValueEventArgs.cs
- AsyncCallback.cs
- UnitySerializationHolder.cs
- CapacityStreamGeometryContext.cs
- RSAPKCS1KeyExchangeFormatter.cs
- ListControl.cs
- ScrollChrome.cs
- EventMap.cs
- Walker.cs
- RunClient.cs
- UnsafeNativeMethods.cs
- NullableBoolConverter.cs
- XmlSerializerFactory.cs
- PerformanceCounterCategory.cs
- ServiceContractListItemList.cs
- WebPartDisplayModeCancelEventArgs.cs
- Size3DValueSerializer.cs
- ByteConverter.cs
- TimeoutException.cs
- PointF.cs
- DynamicValueConverter.cs
- ListViewItemSelectionChangedEvent.cs
- EdmPropertyAttribute.cs
- CompoundFileStorageReference.cs
- DataGridViewAdvancedBorderStyle.cs
- EventProxy.cs
- MultipleViewPattern.cs
- ReceiveContextCollection.cs
- XmlArrayItemAttributes.cs
- XmlSchemaAnyAttribute.cs
- WebPartHelpVerb.cs
- DataFieldConverter.cs
- BufferAllocator.cs
- MethodToken.cs
- IndentTextWriter.cs
- PropertyInfo.cs
- configsystem.cs
- DataProtection.cs
- TextTreeUndoUnit.cs
- ResXFileRef.cs
- MethodBody.cs
- Transform3D.cs
- BamlVersionHeader.cs
- ValidationPropertyAttribute.cs
- DirtyTextRange.cs
- Utility.cs
- MethodBody.cs
- IHttpResponseInternal.cs
- SelectionProviderWrapper.cs
- BaseValidator.cs
- Selection.cs
- Typeface.cs
- SafeFileMappingHandle.cs
- RegexCapture.cs
- CssTextWriter.cs
- BufferedGraphicsManager.cs
- SortedList.cs
- FlowLayoutSettings.cs
- shaper.cs
- _LocalDataStoreMgr.cs
- TableCellCollection.cs
- GridViewRowEventArgs.cs
- BoundColumn.cs
- RightsManagementManager.cs
- SchemaExporter.cs
- XamlPointCollectionSerializer.cs
- CryptoConfig.cs
- PositiveTimeSpanValidator.cs
- HostedTransportConfigurationManager.cs
- LinkButton.cs
- MulticastIPAddressInformationCollection.cs
- ImageDrawing.cs
- JoinCqlBlock.cs
- Int32.cs
- DataSet.cs
- Model3DGroup.cs
- RectKeyFrameCollection.cs
- DataGridViewRowPostPaintEventArgs.cs
- RegexRunner.cs
- DataSourceHelper.cs
- ProcessStartInfo.cs
- DeviceFiltersSection.cs
- SystemParameters.cs
- Scheduler.cs
- SHA384Managed.cs
- SHA256Managed.cs
- ProofTokenCryptoHandle.cs
- MethodAccessException.cs
- InvalidComObjectException.cs
- DocumentPageView.cs
- smtppermission.cs
- XsdDateTime.cs
- EncryptedData.cs
- SerialPort.cs
- StyleBamlTreeBuilder.cs