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UserFormCommandManager.cs
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Upload Date: 2022-03-24
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UserFormCommandManager.cs：Code Content
  1. // -- FILE ------------------------------------------------------------------
  2. // name       : UserFormCommandManager.cs
  3. // project    : Itenso Web User Forms
  4. // created    : Jani Giannoudis - 2008.10.30
  5. // language   : c#
  6. // environment: .NET 2.0
  7. // copyright  : (c) 2008 by Itenso GmbH, Switzerland
  8. // --------------------------------------------------------------------------
  9. using System;
  10. using System.Collections.Generic;
  11. using System.Web.UI;
  12. using System.Web.UI.WebControls;
  14. namespace Itenso.WebUserForms.Controls
  15. {
  17. // ------------------------------------------------------------------------
  18. public class UserFormCommandManager
  19. {
  21. // ----------------------------------------------------------------------
  22. public event CommandEventHandler Command;
  24. // ----------------------------------------------------------------------
  25. public UserFormCommandManager( UserControl userControl )
  26. {
  27. if ( userControl == null )
  28. {
  29. throw new ArgumentNullException( "userControl" );
  30. }
  32. this.userControl = userControl;
  33. RegisterEvents();
  34. } // UserFormCommandManager
  36. // ----------------------------------------------------------------------
  37. public UserControl UserControl
  38. {
  39. get { return this.userControl; }
  40. } // UserControl
  42. // ----------------------------------------------------------------------
  43. public bool HasCommand( string commandName )
  44. {
  45. if ( string.IsNullOrEmpty( commandName) )
  46. {
  47. throw new ArgumentNullException( "commandName" );
  48. }
  50. if ( this.formCommands == null || this.formCommands.Count == 0 )
  51. {
  52. return false;
  53. }
  55. foreach ( IUserFormCommand formCommand in formCommands )
  56. {
  57. if ( commandName.Equals( formCommand.CommandName ) )
  58. {
  59. return true;
  60. }
  61. }
  63. return false;
  64. } // HasCommand
  66. // ----------------------------------------------------------------------
  67. public void EnableCommand( string commandName, bool enabled )
  68. {
  69. if ( string.IsNullOrEmpty( commandName ) )
  70. {
  71. throw new ArgumentNullException( "commandName" );
  72. }
  74. if ( this.formCommands == null || this.formCommands.Count == 0 )
  75. {
  76. return;
  77. }
  79. commandName = commandName.ToLower();
  80. foreach ( IUserFormCommand formCommand in formCommands )
  81. {
  82. if ( commandName.Equals( formCommand.CommandName.ToLower() ) )
  83. {
  84. formCommand.Enabled = enabled;
  85. }
  86. }
  87. } // EnableCommand
  89. // ----------------------------------------------------------------------
  90. protected virtual void OnCommand( IUserFormCommand formCommand, CommandEventArgs e )
  91. {
  92. if ( Command != null )
  93. {
  94. Command( formCommand, e );
  95. }
  96. } // OnCommand
  98. // ----------------------------------------------------------------------
  99. private void RegisterEvents()
  100. {
  101. this.formCommands = CommandCollector.Collect( this.userControl );
  102. if ( this.formCommands == null || this.formCommands.Count == 0 )
  103. {
  104. return;
  105. }
  107. foreach ( IUserFormCommand formCommand in formCommands )
  108. {
  109. formCommand.Command += new CommandEventHandler(FormCommandCommand);
  110. }
  111. } // RegisterEvents
  113. // ----------------------------------------------------------------------
  114. private void UnregisterEvents()
  115. {
  116. if ( this.formCommands == null || this.formCommands.Count == 0 )
  117. {
  118. return;
  119. }
  121. foreach ( IUserFormCommand formCommand in formCommands )
  122. {
  123. formCommand.Command -= new CommandEventHandler( FormCommandCommand );
  124. }
  125. } // UnregisterEvents
  127. // ----------------------------------------------------------------------
  128. private void FormCommandCommand( object sender, CommandEventArgs e )
  129. {
  130. IUserFormCommand formCommand = sender as IUserFormCommand;
  131. if ( formCommand == null )
  132. {
  133. return;
  134. }
  136. OnCommand( formCommand, e );
  137. } // RegisterEvents
  139. // ----------------------------------------------------------------------
  140. // members
  141. private readonly UserControl userControl;
  142. private List<IUserFormCommand> formCommands;
  144. } // class UserFormCommandManager
  146. } // namespace Itenso.WebUserForms.Controls
  147. // -- EOF -------------------------------------------------------------------