LimitToList Property

// LimitToList property
     private void Form1_Load(object sender, System.EventArgs e)
     {
         this.ultraComboEditor1.Items.Add( "One" );
         this.ultraComboEditor1.Items.Add( "Two" );
         this.ultraComboEditor1.Items.Add( "Three" );
         this.ultraComboEditor1.Items.Add( "Four" );

         // The LimitToList property specifies whether the UltraComboEditor will retain focus upon
         // validation whenever the entered value is not a value in the control's ValueList.
         this.ultraComboEditor1.LimitToList = true;
     }

// ItemNotInList event
     private void ultraComboEditor1_ItemNotInList(object sender, Infragistics.Win.UltraWinEditors.ValidationErrorEventArgs e)
     {
         // The ItemNotInList event is fired before the Validating event of the UltraComboEditor whenever
         // the text value entered into the editor portion of the control is not a value in the control’s
         // ValueList.  The event passes a ValidationErrorEventArgs object that contains InvalidText
         // and LastValidValue properties as well as properties for specifying that the UltraComboEditor
         // should retain focus or beep to provide an auditory cue.

         // Specifies whether the control will retain focus. Overrides the UltraComboEditor's LimitToList
         // property if RetainFocus is set to false.
         e.RetainFocus = true;

         // Provide an auditory cue that the enetered text is invalid.  If a message box is used this will be
         // unnecesary since the message box will provide a beep.
         e.Beep = true;

         // Display a message box indicating that the entered text is invalid.
         MessageBox.Show( e.InvalidText + " is not a valid value.", "Invalid Entry" );

         // Restore a previously valid value if one was entered, otherwise set a valid default value.
         if ( e.LastValidValue != null )
             this.ultraComboEditor1.Value = e.LastValidValue;
         else
             this.ultraComboEditor1.SelectedItem = this.ultraComboEditor1.Items[0];

     }    

// IsItemInList overloaded methods
     private void button1_Click(object sender, System.EventArgs e)
     {
         // The IsItemInList overloaded methods return a boolean indicating whether the value of the
         // UltraComboEditor's Text property, or a specified string, is a value in the control's ValueList.
         // This provides a convenient way to perform validation in code.

         // If the current value of the UltraComboEditor's Text property is not a value in the control's
         // ValueList assign a valid text value.
         bool currentTextIsValid = this.ultraComboEditor1.IsItemInList();
         if ( !currentTextIsValid )
             this.ultraComboEditor1.Text = "Some valid text value";

         // If the specified string is not a value in the UltraComboEditor's ValueList assign a valid text value.
         string someText = "Some Text";
         bool itemIsInList = this.ultraComboEditor1.IsItemInList( someText );

         if( itemIsInList )
             this.ultraComboEditor1.Text = someText;
         else
             System.Diagnostics.Debug.WriteLine( someText + " is not in the list" );
     }