Esempio n. 1
0
        /// <summary>
        /// Enables auto suggest for the specified text box.
        /// </summary>
        /// <param name="textBox">The text box.</param>
        /// <param name="suggestions">The suggestions.</param>
        public static void Enable(TextBox textBox, string[] suggestions)
        {
            // Try to enable a more advanced settings for AutoComplete via the WinShell interface
            try
            {
                SourceCustomList source = new SourceCustomList {
                    StringList = suggestions.ToArray()
                };

                // For options descriptions see:
                // https://docs.microsoft.com/en-us/windows/win32/api/shldisp/ne-shldisp-autocompleteoptions
                AUTOCOMPLETEOPTIONS options = AUTOCOMPLETEOPTIONS.ACO_UPDOWNKEYDROPSLIST | AUTOCOMPLETEOPTIONS.ACO_USETAB |
                                              AUTOCOMPLETEOPTIONS.ACO_AUTOAPPEND | AUTOCOMPLETEOPTIONS.ACO_AUTOSUGGEST;
                Enable(textBox.Handle, source, options);
            }
            catch (Exception)
            {
                // In case of an error, let's fall back to the default
                AutoCompleteStringCollection source = new AutoCompleteStringCollection();
                source.AddRange(suggestions);
                textBox.AutoCompleteMode         = AutoCompleteMode.SuggestAppend;
                textBox.AutoCompleteSource       = AutoCompleteSource.CustomSource;
                textBox.AutoCompleteCustomSource = source;
            }
        }
Esempio n. 2
0
        /// <summary>
        /// Enables the specified control handle.
        /// </summary>
        /// <param name="controlHandle">The control handle.</param>
        /// <param name="items">The items.</param>
        /// <param name="options">The options.</param>
        private static void Enable(IntPtr controlHandle, SourceCustomList items, AUTOCOMPLETEOPTIONS options)
        {
            if (controlHandle == IntPtr.Zero)
            {
                return;
            }

            IAutoComplete2?iac = null;

            try
            {
                iac = GetAutoComplete() as IAutoComplete2;
                iac?.Init(controlHandle, items, string.Empty, string.Empty);
                iac?.SetOptions(options);
                iac?.Enable(true);
            }
            finally
            {
                if (iac != null)
                {
                    Marshal.ReleaseComObject(iac);
                }
            }
        }