世俱杯 2025

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows.Data;

using System.Xml;

using System.Windows.Controls;

using System.Windows;

namespace TincyhoHelper

{

    /// <summary>

    /// 声明全局变量，一个string型，作为文件名，一个DataGrid型，即指定的DataGrid

    /// 实例化时将指定的DataGrid和文件名作为参数传入该类。

    /// 载入页面时，先加载右键菜单。再从XML文件读取配置信息，这里必须加System.IO.File.Exist()条件判断文件是否存在

    /// 关闭页面时将配置信息写入XML文件

    /// </summary>

    public class ColumnHelper

    {

        string filename;

        XmlDocument xmlDoc = new XmlDocument();

        DataGrid dgPerson;

        /// <summary>

        /// 用指定的DataGrid和文件名初始化ColumnHelper类的新实例

        /// </summary>

        /// <param name="dgPerson"></param>

        public ColumnHelper(DataGrid dgPerson, string filename)

        {

            // TODO: Complete member initialization

            this.dgPerson = dgPerson;

            this.filename = filename;

        }

        /// <summary>

        /// 添加右键菜单中的CheckBox

        /// </summary>

        /// <param name="content">CheckBox显示的名字</param>

        /// <param name="source">绑定的列名</param>

        public void addCheckbox()

        {

            ContextMenu cm = new ContextMenu();

            for (int i = 0; i < dgPerson.Columns.Count; i++)

            {

                CheckBox cb = new CheckBox();

                cb.Content = dgPerson.Columns[i].Header.ToString();

                bindColumnAndCheckbox(dgPerson.Columns[i], cb);

                cm.Items.Add(cb);

            }

            dgPerson.ContextMenu = cm;

        }

        /// <summary>

        /// 将DataGrid中的列的Visibility属性和CheckBox的IsCheck属性绑定

        /// </summary>

        /// <param name="column">绑定的列名</param>

        /// <param name="checkbox">显示的CheckBox</param>

        public void bindColumnAndCheckbox(object column, CheckBox checkbox)

        {

            Binding binding = new Binding("Visibility");

            binding.Source = column;

            binding.Converter = new MyConverter(); // 设定Converter  

            checkbox.SetBinding(CheckBox.IsCheckedProperty, binding);

        }

        /// <summary>

        /// 读取XML文件中的配置信息

        /// </summary>

        /// <param name="filename">XML文件路径</param>

        public void readXML()

        {

            try

            {

                xmlDoc.Load(filename);

                XmlNodeList list = xmlDoc.GetElementsByTagName("*");

                XmlElement element;

                for (int i = 1; i < list.Count; i++)

                {

                    element = (XmlElement)list.Item(i);

080

                    string str = element.InnerText.ToString();

                    dgPerson.Columns[i - 1].Visibility = (Visibility)Enum.Parse(typeof(Visibility), str, true);

                }

            }

            catch (Exception ex)

            {

                throw ex;

            }

        }

        /// <summary>

        /// 将配置信息写入XML文件中

        /// </summary>

        /// <param name="filename">XML文件路径</param>

        public void writeXML()

        {

            try

            {

 XmlNode xmlNode = xmlDoc.CreateNode(XmlNodeType.XmlDeclaration, "", "");

  XmlNode myNode = xmlDoc.CreateNode(XmlNodeType.Element, "appSetting", "");

                if (!System.IO.File.Exists(filename))

                {

                    xmlDoc.AppendChild(xmlNode);

                    xmlDoc.AppendChild(myNode);

                    for (int i = 0; i < dgPerson.Columns.Count; i++)

                    {

  string strRoot = dgPerson.Columns[i].Header.ToString();

                        string strText = dgPerson.Columns[i].Visibility.ToString();

                        XmlElement xmlelem = xmlDoc.CreateElement("", strRoot, "");

                        xmlelem.InnerText = strText;

 myNode.AppendChild(xmlelem);

                    }

                    xmlDoc.Save(filename);

                }

                else

                {

                    xmlDoc.Load(filename);

                    XmlNodeList list = xmlDoc.GetElementsByTagName("*");

                    XmlElement element;

                    for (int i = 1; i < list.Count; i++)

                    {

                        element = (XmlElement)list.Item(i);

   element.InnerText = dgPerson.Columns[i - 1].Visibility.ToString();

                    }

                    xmlDoc.Save(filename);

                }

            }

            catch (Exception ex)

            {

130

                throw ex;

            }

        }

    }

    /// <summary>

    /// 转换器。功能：使CheckBox的IsChecked属性和DataGrid控件中的列的Visibility属性可以关联。

    /// </summary>

    [ValueConversion(typeof(Enum), typeof(bool?))]

    public class MyConverter : IValueConverter

    {

        /// <summary>

        /// 将DataGrid列的Visibility属性转换为bool型，方便CheckBox的IsChecked属性赋值

        /// </summary>

        /// <param name="value"></param>

        /// <param name="targetType"></param>

        /// <param name="parameter"></param>

        /// <param name="culture"></param>

        /// <returns></returns>

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

        {

            string str = System.Convert.ToString(value);

            if (str.Equals("Visible"))

                return true;

            else

                return false;

        }

        /// <summary>

        /// 将CheckBox的IsChecked属性的bool值转换成Visibility属性，方便DataGrid列属性赋值

        /// </summary>

        /// <param name="value"></param>

164

        /// <param name="targetType"></param>

        /// <param name="parameter"></param>

        /// <param name="culture"></param>

        /// <returns></returns>

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

        {

            bool b = System.Convert.ToBoolean(value);

            if (b.Equals(true))

            {

                return (Visibility)Enum.Parse(typeof(Visibility), "Visible", true);

            }

            else

                return (Visibility)Enum.Parse(typeof(Visibility), "Hidden", true);

        }

    }

}

　　<SPAN style="FONT-SIZE: 14px">  在使用的时候，只要实例化一下这个类就可以了（这里记得要把需要该功能的DataGrid作为参数传入，由于我这里使用的是XML文件来保存用户的自定义列布局，所以还要将保存</SPAN>

　　<SPAN style="FONT-SIZE: 14px">XML的文件名也作为参数传入）。在页面加载时读取XML文件里的信息，以此判断哪些列显示，哪些列不显示。第一次运行时这个XML文件肯定不存在，所以要加上判断条件，不存</SPAN>

　　<SPAN style="FONT-SIZE: 14px">在就不管了（第一次运行肯定所有列都要显示出来），以后运行的话文件肯定已经存在了，这是再进行读取XML操作就好。页面关闭的时候调用写入XML的方法。  最终的运行效果</SPAN>

　　<SPAN style="FONT-SIZE: 14px">就是当在DataGrid控件上点击右键的时候，弹出和DataGrid中的列一一对应的CheckBox，并且CheckBox的IsChecked属性和DataGrid列的Visibility属性已经绑定。</SPAN>

　　<SPAN style="FONT-SIZE: 14px">截图如下：</SPAN>