CommonUtils.Core.Windows/TextBoxExtensions.cs

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using System.Collections.Generic;
using System.Windows.Controls;

namespace CommonUtils
{
    public static class TextBoxExtensions
    {
        public static void BindCalendar(this TextBox textBox, Calendar calendar)
        {
            calendar.Hidden();
            textBox.GotFocus += delegate { calendar.Show(); };
            calendar.SelectedDatesChanged += delegate
            {
                if (calendar.SelectedDate == null)
                    return;
                textBox.Text = calendar.SelectedDate.ToString();
                calendar.SelectedDate = null;
                calendar.Hidden();
            };
        }

        /// <summary>
        /// 空判断
        /// </summary>
        public static bool IsNullOrEmpty(this TextBox textBox)
        => string.IsNullOrEmpty(textBox.Text);

        /// <summary>
        /// 空判断
        /// </summary>
        public static bool IsNullOrWhiteSpace(this TextBox textBox)
        => string.IsNullOrWhiteSpace(textBox.Text);

        /// <summary>
        /// 是否为有效文件路径
        /// </summary>
        public static bool IsFilePath(this TextBox textBox)
        => FileUtil.Exists(textBox.Text);

        /// <summary>
        /// 获取文件夹路径,末尾不带斜杠"\\"
        /// </summary>
        public static void SelectFolder(this TextBox textBox, bool save = false)
        {
            string path = WindowsUtil.SelectFolder();
            if (!string.IsNullOrWhiteSpace(path))
            {
                textBox.Text = path;
                if (save)
                    textBox.SaveValue();
            }
        }

        public static void SelectFolderOnDoubleClick(this TextBox textBox, bool save = false)
        {
            textBox.MouseDoubleClick += delegate
            {
                textBox.SelectFolder(save);
            };
        }