将.csv文件读入WPF应用程序(C#)

时间:2014-02-16 15:48:44

标签: c# xaml listview

我刚刚创建了一个C#控制台应用程序,可以读取.csv文件并以一种简洁的方式将其写入控制台,但是现在我想在WPF中使它更加整洁。

我之前的控制台应用程序如下所示:

class Program
{
    static void Main(string[] args)
    {
        string[] tokens;
        char[] separators = { ';' };
        string str = "";

        FileStream fs = new FileStream(@"D:\Dokumenter\Skole\6. semester\GUI\Exercises\Exercise2\02 deltagerliste.csv", 
                                       FileMode.Open);
        StreamReader sr = new StreamReader(fs, Encoding.Default);

        while ((str = sr.ReadLine()) != null)
        {
            tokens = str.Split(separators, StringSplitOptions.RemoveEmptyEntries);

            Console.WriteLine(String.Format("{0,-20}", tokens[0]) +
                              String.Format("{0,-15}", tokens[1]) +
                              String.Format("{0,-15}", tokens[2]) +
                              String.Format("{0,-15}", tokens[3]));
        }

        Console.ReadLine();            
    }
}

效果很好,但我必须承认,我很难找到从WPF应用程序开始的位置。

到目前为止,我已经使用.csv文件的四个标头(由于它有四列)构建了以下XAML代码,并且我假设我必须找到一种方法将相应的行放入相应的列中。

<Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Deltagerliste" Height="350" Width="525" WindowStartupLocation="CenterScreen" WindowState="Maximized"
    Background="DeepPink"
    >
<ListView HorizontalAlignment="Left" Height="320" VerticalAlignment="Top" Width="517">
    <ListView.View>
        <GridView>
            <GridViewColumn Header="First name"/>
            <GridViewColumn Header="Last name"/>
            <GridViewColumn Header="ID"/>
            <GridViewColumn Header="Email"/>
        </GridView>
    </ListView.View>
</ListView>

我的主要和初始问题是我如何将文件读入ListView。我是C#和XAML的新手,虽然我很清楚如何在C#中打开和读取文件,但XAML中的语法对我来说有点混乱。

1 个答案:

答案 0 :(得分:16)

首先:创建一个将每行保存数据的类。

public class Person
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public int ID { get; set; }
    public string Email { get; set; }

    public Person(string firstName, string lastName, int id, string email)
    {
        FirstName = firstName;
        LastName = lastName;
        ID = id;
        Email = email;
    }
}

然后创建一个函数,该函数将从CSV文件返回人员列表:

public IEnumerable<Person> ReadCSV(string fileName)
{
    // We change file extension here to make sure it's a .csv file.
    // TODO: Error checking.
    string[] lines = File.ReadAllLines(System.IO.Path.ChangeExtension(fileName, ".csv"));

    // lines.Select allows me to project each line as a Person. 
    // This will give me an IEnumerable<Person> back.
    return lines.Select(line =>
    {
        string[] data = line.Split(';');
        // We return a person with the data in order.
        return new Person(data[0], data[1], Convert.ToInt32(data[2]), data[3]);
    });
}

然后使用适当的绑定配置listview列。 注意 x:Name属性是您将用于在表单的.cs文件中访问此列表视图的名称:

<ListView x:Name="ListViewPeople">
    <ListView.View>
        <GridView>
            <GridViewColumn Header="First name" Width="100" DisplayMemberBinding="{Binding Path=FirstName}"/>
            <GridViewColumn Header="Last name" Width="150" DisplayMemberBinding="{Binding Path=LastName}"/>
            <GridViewColumn Header="ID" Width="40" DisplayMemberBinding="{Binding Path=ID}"/>
            <GridViewColumn Header="Email" Width="200" DisplayMemberBinding="{Binding Path=Email}"/>
        </GridView>
    </ListView.View>
</ListView>

最后,将listview的ItemsSource绑定到返回Person列表的方法:

public MainWindow()
{
    InitializeComponent();

    // We can access ListViewPeople here because that's the Name of our list
    // using the x:Name property in the designer.
    ListViewPeople.ItemsSource = ReadCSV("example");
}

CSV文件

Henk;van Dam;1;henk.van.dam@gmail.com
Alex;the Great;2;alex.the_great@live.nl

最终结果

Program result