Question

我正在创建一个字符串List<>，然后将根据文本文档之间的差异来调用该字符串以填充数据网格。数据似乎正在填充Datagrid，但实际上并未显示。我知道这听起来很混乱，但是我使用背景色/前景色，似乎它们甚至都不会影响它。我能够使它与文本块一起使用，但随后无法滚动。

    string sSelectedFile;
    string sSelectedFolder;

    public static List<String> txt1 = new List<string>();
    public static List<String> txt2 = new List<string>();
    public static List<String> Diff = new List<string>();


    public MainWindow()
    {
        InitializeComponent();
    }



    private void MenuItem_Click(object sender, RoutedEventArgs e)
    {
        Environment.Exit(0);
    }

    private void Button_Click_1(object sender, RoutedEventArgs e)
    {
        FolderBrowserDialog fbd = new FolderBrowserDialog();
        //fbd.Description = "Custom Description"; //not mandatory

        if (fbd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            sSelectedFolder = fbd.SelectedPath;
        else
            sSelectedFolder = string.Empty;

        Textbox2.Text = sSelectedFolder;
    }

    private void Button_Click_2(object sender, RoutedEventArgs e)
    {
        OpenFileDialog choofdlog = new OpenFileDialog();
        choofdlog.Filter = "txt files (*.txt)|*.txt";
        choofdlog.FilterIndex = 1;
        choofdlog.Multiselect = true;

        if (choofdlog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            sSelectedFile = choofdlog.FileName;
        else
            sSelectedFile = string.Empty;


        Textbox2.Text = sSelectedFile;
    }



    private void Button_Click_3(object sender, RoutedEventArgs e)
    {
        OpenFileDialog choofdlog = new OpenFileDialog();
        choofdlog.Filter = "txt files (*.txt)|*.txt";
        choofdlog.FilterIndex = 1;
        choofdlog.Multiselect = true;

        if (choofdlog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            sSelectedFile = choofdlog.FileName;
        else
            sSelectedFile = string.Empty;


        Textbox3.Text = sSelectedFile;
    }




    private void Button_Click(object sender, RoutedEventArgs e)
    {


        FillListTxt1();

        FillListTxt2();


        compareStringList();

    }


    public void FillListTxt1()
    {

        txt1.Clear();


        try
        {

            var fileStream = new FileStream(Textbox2.Text, FileMode.Open, FileAccess.Read);
            using (var streamReader = new StreamReader(fileStream, Encoding.UTF8))
            {
                string line;
                while ((line = streamReader.ReadLine()) != null)
                {

                    txt1.Add(line);



                }
            }

        }
        catch  (Exception ex)
        {

            throw ex;

        }




    }


    public void FillListTxt2()
    {


        txt2.Clear();

        try
        {

            var fileStream = new FileStream(Textbox3.Text, FileMode.Open, FileAccess.Read);
            using (var streamReader = new StreamReader(fileStream, Encoding.UTF8))
            {
                string line;
                while ((line = streamReader.ReadLine()) != null)
                {



                    txt2.Add(line);





                }
            }

        }
        catch (Exception ex)
        {

            throw ex;

        }



    }
public class CustomerInformation
{

    public string GetDiff { get; set; }     

}


     public void compareStringList()
    {



        Diff.Clear();


        string Text1;
        string Text2;
        string StillCounting = "Yes";

        int IndexTxt1 = 0;
        int IndexTxt2 = 0;

        int Counter = 0;


        Int32 length = txt1.Count;
        Int32 length1 = txt2.Count;

        while (StillCounting == "Yes")
        {

            if (length > IndexTxt1 & length1 > IndexTxt2)
            {

                Text1 = txt1[IndexTxt1];
                Text2 = txt2[IndexTxt2];

                if (Text1 != Text2)
                {

                    //System.Windows.Forms.MessageBox.Show("There is a difference on line " +  IndexTxt1.ToString());


                    string DifferencesInList = "There is a difference on line " + IndexTxt1.ToString();

                    Diff.Add(DifferencesInList);




                    IndexTxt1 = IndexTxt1 + 1;
                    IndexTxt2 = IndexTxt2 + 1;

                    Counter = Counter + 1;
                }
                else
                {

                    IndexTxt1 = IndexTxt1 + 1;
                    IndexTxt2 = IndexTxt2 + 1;

                }



            }
            else
            {



                StillCounting = "No";

            }






        }


        if (Counter == 0)
        {

            System.Windows.Forms.MessageBox.Show("These are exactly the same");

        }


        FillDataGrid();


    }


public void FillDataGrid()
{




     Int32 length1 = Diff.Count;
     int countLength = 0;

     string Text2; 

     //Text2 = Diff[countLength];

     while (length1 > countLength)
     {


          CustomerInformation TempCust = new CustomerInformation();

          TempCust.GetDiff =  Diff[countLength];

          Differences.Items.Add(TempCust.GetDiff);

          Differences.MinRowHeight = 30;

          countLength = countLength + 1;

     }


     //Differences.DataContext = Diff;

}

这是Datagrid的XAML代码：

    <DataGrid AutoGenerateColumns="True" HorizontalScrollBarVisibility="Visible" Width="400" x:Name="Differences" Grid.Row="4" Grid.ColumnSpan="3" FontSize="16" Grid.Column="1">

         <DataGrid.Resources>

            <Style TargetType="{x:Type DataGrid}">

                <Setter Property="HorizontalContentAlignment" Value="Left"/>
                <Setter Property="Background" Value="White"/>
                <Setter Property="FontWeight" Value="Bold"/>
                <Setter Property="Foreground" Value="Black"/>
                <Setter Property="BorderThickness" Value="0,0,1,2"/>
                <Setter Property="BorderBrush" Value="Black"/>

            </Style>

            <Style TargetType="{x:Type DataGridColumnHeader}">

                <Setter Property="Background" Value="White"/>
                <Setter Property="FontWeight" Value="Bold"/>
                <Setter Property="Foreground" Value="Black"/>
                <Setter Property="BorderThickness" Value="0,0,1,2"/>
                <Setter Property="BorderBrush" Value="Black"/>
                <Setter Property="HorizontalContentAlignment" Value="Center"/>

            </Style>

        </DataGrid.Resources>


        <DataGridTextColumn Width="10"/>
        <DataGridTextColumn Header="Difference On Lines" Binding="{Binding GetDiff}" FontSize="16" Width="200"/>
        <DataGridTextColumn Width="10"/>


    </DataGrid>

输出将填充Datagrid，但不会显示。对于格式错误，我深表歉意。我很难让他们得到纠正。这不应该是代码。

单击按钮之前

单击按钮后

Answer 1

首先，让我们创建一个可观察的集合，将其用于填充DataGrid。由于您的网格列绑定到名为GetDiff的属性，并且CustomerInformation具有该名称的属性，因此我猜您想用该类填充网格。

MainWindow.xaml.cs

//  I don't know how you're populating this list. I'm guessing that happens in 
//  compareStringList() and then you call FillDataGrid(). 
private List<string> Diff;
public ObservableCollection<CustomerInformation> CustomerInformationList { get; } 
    = new ObservableCollection<CustomerInformation>();

public void FillDataGrid()
{
    CustomerInformationList.Clear();

    foreach (var diff in Diff)
    {
        CustomerInformation TempCust = new CustomerInformation();

        TempCust.GetDiff = diff;

        CustomerInformationList.Add(TempCust);
    }
}

现在，让我们使用绑定来告诉您的DataGrid使用我们创建的collection属性。因为您在DataGrid上设置了AutoGenerateColumns="True"，所以不需要自己创建列，但是有了绑定，所以我设置了AutoGenerateColumns =“ False”并包括了列定义。

<DataGrid 
    ItemsSource="{Binding CustomerInformationList, RelativeSource={RelativeSource AncestorType=Window}}"
    AutoGenerateColumns="True" 
    HorizontalScrollBarVisibility="Visible" 
    Width="400" 
    x:Name="Differences" 
    Grid.Row="4" 
    Grid.ColumnSpan="3" 
    FontSize="16" Grid.Column="1"
    >
    <DataGrid.Resources>
        <!-- Stuff omitted -->
    </DataGrid.Resources>
    <DataGrid.Columns>
        <!-- 
        Each row is one item from CustomerInformationList. That means each row is an instance of
        CustomerInformation. CustomerInformation has a property named GetDiff, and here is how we 
        bind to that property. 
        -->
        <DataGridTextColumn 
            Header="Difference On Lines" 
            Binding="{Binding GetDiff}" 
            FontSize="16" 
            Width="200"
            />
    </DataGrid.Columns>
</DataGrid>

Answer 2

您要将string添加到DataGrid，但绑定到GetDiff。

方法“ FillDataGrid ”

CustomerInformation TempCust = new CustomerInformation();
TempCust.GetDiff =  Diff[countLength];
Differences.Items.Add(TempCust.GetDiff); // <-- here you are adding string
// change it to "Differences.Items.Add(TempCust);" and it should work

XAML

<!-- here you are binding to "GetDiff" -->
<DataGridTextColumn Header="Difference On Lines" Binding="{Binding GetDiff}" FontSize="16" Width="200"/>

数据填充Datagrid，但未出现在WPF中

2 个答案: