将二维字符串数组作为WPF ListView的ItemSource

来源:互联网 发布:数控pmc编程 编辑:程序博客网 时间:2024/05/17 20:34

在WPF中,平时我们使用绑定,是将一个对象数组当作数据源,而对象又有很多属性,间接的相当于二维数组,但这样做我们事先要知道对象有什么属性,有几个属性才能绑定,万一不确定ListView的列有多少行,需要在运行时才能确定呢?举例如下:
第一张图:
这里写图片描述
第二张图:
这里写图片描述
这两张图的数据的列数不一样,还有可能有其他列数不一样的文件数据,现在的需求是:要求我们的WPF ListView能够载入文件,然后显示出来。
因为有不确定性,所以无法事先定义Model来绑定到ListView上去。如果是Winform的Listview可以一列一列的赋值,但是WPF怎么实现呢?请看:
首先我们要获取列名:用一个string的数组表示好了,用一个二维string数组表示数据:

string[] headers = new string[] { "姓名", "年龄", "身高" };string[][] datas = new string[][] {     new string[] { "111","1","165"},     new string[] { "222","2","165"} };

要注意headers 的长度与datas的第二个维度的长度要一样。
本示例前台代码:

<Window x:Class="二维数组绑定ListView.MainWindow"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"        xmlns:local="clr-namespace:二维数组绑定ListView"        mc:Ignorable="d"        Title="MainWindow" Height="350" Width="525" Loaded="Window_Loaded">    <Grid>        <ListView Name="lv"></ListView>    </Grid></Window>

动态创建ListView的列(根据headers的长度):

 private void GenerateColumns(ListView listView, string[] headers)        {            if (headers == null || headers.Length == 0)                return;            GridView gridView = new GridView();            listView.View = gridView;            for (int i = 0; i < headers.Length; i++)            {                GridViewColumn column = new GridViewColumn();                column.Header = headers[i];//设置列名称                //此处设置数组的绑定,数组取第0个元素为list[0],通过索引器取                column.DisplayMemberBinding = new Binding(string.Format("[{0}]", i));                gridView.Columns.Add(column);            }        }

其中最重要的一句是:column.DisplayMemberBinding = new Binding(string.Format(“[{0}]”, i));动态绑定字符串数组里的元素
全部前台代码贴出来如下:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Navigation;using System.Windows.Shapes;namespace 二维数组绑定ListView{    /// <summary>    /// Interaction logic for MainWindow.xaml    /// </summary>    public partial class MainWindow : Window    {        public MainWindow()        {            InitializeComponent();        }        private void Window_Loaded(object sender, RoutedEventArgs e)        {            string[] headers = new string[] { "姓名", "年龄", "身高" };            string[][] datas = new string[][]            {                new string[] { "111","1","165"},                new string[] { "222","2","165"}            };            //根据Header长度生产列            GenerateColumns(lv, headers);            //设置数据源            lv.ItemsSource = datas;        }        private void GenerateColumns(ListView listView, string[] headers)        {            if (headers == null || headers.Length == 0)                return;            GridView gridView = new GridView();            listView.View = gridView;            for (int i = 0; i < headers.Length; i++)            {                GridViewColumn column = new GridViewColumn();                column.Header = headers[i];//设置列名称                //此处设置数组的绑定,数组取第0个元素为list[0],通过索引器取                column.DisplayMemberBinding = new Binding(string.Format("[{0}]", i));                gridView.Columns.Add(column);            }        }    }}

运行结果:
这里写图片描述
增加header的列:

 private void Window_Loaded(object sender, RoutedEventArgs e)        {            //string[] headers = new string[] { "姓名", "年龄", "身高" };            //string[][] datas = new string[][]            //{            //    new string[] { "111","1","165"},            //    new string[] { "222","2","165"}            //};            string[] headers = new string[] { "姓名", "年龄", "身高","体重","学历","户籍" };            string[][] datas = new string[][]            {                new string[] { "111","1","165","45KG","本科","湖北"},                new string[] { "222","2","165","45KG","大专","湖南"}            };            //根据Header长度生产列            GenerateColumns(lv, headers);            //设置数据源            lv.ItemsSource = datas;        }

运行结果如下:
这里写图片描述
这样就解决了列不确定时,需要用ListView动态显示和绑定数据的问题