62 lines
2.3 KiB
C#
62 lines
2.3 KiB
C#
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using System;
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using System.IO;
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using DevExpress.Xpo;
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using DevExpress.ExpressApp;
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using System.ComponentModel;
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using DevExpress.Persistent.Base;
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using DevExpress.Persistent.BaseImpl;
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using DevExpress.Persistent.Validation;
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namespace FileSystemData.BusinessObjects {
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/// <summary>
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/// This class enables you to add soft links to real files instead of saving their contents to the database. It is intended for use in Windows Forms applications only.
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/// </summary>
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[DefaultProperty(nameof(FileName))]
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public class FileSystemLinkObject : BaseObject, IFileData, IEmptyCheckable, ISupportFullName {
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public FileSystemLinkObject(Session session) : base(session) { }
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#region IFileData Members
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[Size(260), Custom("AllowEdit", "False")]
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public string FileName {
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get { return GetPropertyValue<string>(nameof(FileName)); }
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set { SetPropertyValue(nameof(FileName), value); }
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}
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void IFileData.Clear() {
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Size = 0;
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FileName = string.Empty;
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}
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//Dennis: Fires when uploading a file.
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void IFileData.LoadFromStream(string fileName, Stream source) {
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Size = (int)source.Length;
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FileName = fileName;
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}
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//Dennis: Fires when saving or opening a file.
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void IFileData.SaveToStream(Stream destination) {
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try {
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if (destination == null)
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FileSystemDataModule.OpenFileWithDefaultProgram(FullName);
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else
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FileSystemDataModule.CopyFileToStream(FullName, destination);
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} catch (Exception exc) {
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throw new UserFriendlyException(exc);
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}
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}
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[Persistent]
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public int Size {
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get { return GetPropertyValue<int>(nameof(Size)); }
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private set { SetPropertyValue(nameof(Size), value); }
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}
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#endregion
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#region IEmptyCheckable Members
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public bool IsEmpty {
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get { return !File.Exists(FullName); }
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}
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#endregion
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#region ISupportFullName Members
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[Size(260), Custom("AllowEdit", "False")]
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public string FullName {
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get { return GetPropertyValue<string>(nameof(FullName)); }
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set { SetPropertyValue(nameof(FullName), value); }
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}
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#endregion
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}
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}
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