自定义依赖属性button content属性值 间距

话不多说直接贴的代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;

namespace ExcelOperator
{
   public  class SpaceButton:Button
    {
        //传统.NET做法 私有字段搭配一个公开属性（Text属性）
        string txt;

        public string Text
        {
            set { txt = value; Content = SpaceOutText(txt); }
            get { return txt; }
        }

        //依赖属性 （表示字符间距）
        public static readonly DependencyProperty SpaceProperty;

        //.NET属性包装器
        public int Space
        {
            set { SetValue(SpaceProperty, value); }
            get { return (int)GetValue(SpaceProperty); }
        }

        //静态的构造函数
        static SpaceButton()
        {
            //定义元数据
            FrameworkPropertyMetadata metadata = new FrameworkPropertyMetadata();
            metadata.DefaultValue = 0;
            metadata.PropertyChangedCallback += OnSpacePropertyChanged;

            metadata.Inherits = true;

            //注册依赖属性
            SpaceProperty = DependencyProperty.Register("Space",typeof(int),typeof(SpaceButton),metadata,ValidateSpaceValue);
        }

        //值验证的回调函数
        static bool ValidateSpaceValue(object obj)
        {
            int i = (int)obj;
            return i >= 0;
        }

        //属性值改变的回调函数
        static void OnSpacePropertyChanged(DependencyObject obj,DependencyPropertyChangedEventArgs args)
        {
            SpaceButton btn = obj as SpaceButton;
            string txt = btn.Content as string;
            if (txt == null) return;
            btn.Content = btn.SpaceOutText(txt);
        }

        //该方法为字符间距添加空格
        string SpaceOutText(string str)
        {
            if (str == null)
                return null;
            StringBuilder build = new StringBuilder();

            //在其中添加space个空格
            foreach (char ch in str)
                build.Append(ch + new string(' ', Space));
            return build.ToString();
        }
    }
}

在页面的cs文件添加 name属性 的space值  Spacebtn.Space = 2;