在單獨的窗口 XAML WPF C# 中加載綁定到字典的 DataGridView

Question

我目前正在嘗試加載一個單獨的窗口，當用戶單擊地圖上的某個位置時出現該窗口。 我希望該窗口顯示保存在 C# 字典中的業務對象數據。

出於某種原因，我無法讓窗口顯示任何內容，它只是保持空白。

我在自己的代碼中定義所有列/行並填充數據表，而不是在設計器中。

這是我的一些線索代碼：

XAML：BusinessDataWindow.xaml

   <Window x:Class="BusinessLocator.BusinessDataTable"

    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:DigoohBusinessLocator"

    mc:Ignorable="d"

    Title="BusinessDataTable" Height="450" Width="800">

<Grid>

    <DataGrid x:Name="BusinessDataGrid" ItemsSource="{Binding Source = BusinessDataGridView}" AutoGenerateColumns="True" HorizontalAlignment="Left" Height="412" VerticalAlignment="Top" Width="785">

    </DataGrid>

</Grid>

---

這是 XAML 背后的代碼（請原諒一些注釋行）：BusinessDataWindow.xaml.cs

/// <summary>

/// Interaction logic for BusinessDataTable.xaml

/// </summary>

public partial class BusinessDataWindow : Window

{

    //System.Windows.Controls.DataGrid BusinessDataGrid;

    //DataGridView BusinessDataGridView;

    DataTable BusinessDataTable;

    Dictionary<string, Business> BusinessLocationDictionary;

    public BusinessDataWindow(Dictionary<string, Business> BusinessLocationDictionary)

    {

        //this.BusinessDataGrid = null;

        this.BusinessLocationDictionary = BusinessLocationDictionary;



        this.initializeDataGridView();

        //this.InitializeComponent();

        //this.Loaded += new RoutedEventHandler(DataGrid_Loaded);

    }



    public DataGridView BusinessDataGridView

    {

        get;

        set;

    }



    private void initializeDataGridView()

    {

        this.BusinessDataGridView = new DataGridView();

        this.BusinessDataTable = new DataTable();

        int businessCount = this.BusinessLocationDictionary.Values.Count;



        string nameColumn = "Name";

        string placeIdColumn = "Place ID";

        string addressColumn = "Address";

        string phoneNumberColumn = "Phone Number";

        string OwnerColumn = "Owner";



        // Add the columns to the DataGridView.

        this.BusinessDataTable.Columns.Add(new DataColumn(nameColumn, typeof(string)));

        this.BusinessDataTable.Columns.Add(new DataColumn(placeIdColumn, typeof(string)));

        this.BusinessDataTable.Columns.Add(new DataColumn(addressColumn, typeof(string)));

        this.BusinessDataTable.Columns.Add(new DataColumn(phoneNumberColumn, typeof(string)));

        this.BusinessDataTable.Columns.Add(new DataColumn(OwnerColumn, typeof(string)));

       

        List<Business> BusinessList = this.BusinessLocationDictionary.Values.ToList<Business>();



        // Add the rows to the DataGridView.

        for (int rowIndex = 0; rowIndex < businessCount; rowIndex++)

        {

            this.BusinessDataTable.Rows.Add(BusinessList.ElementAt(rowIndex));

            this.populateDataGridCells();

        }

    }



    private void populateDataGridCells()

    {

        int businessCount = this.BusinessLocationDictionary.Values.Count;

        List<Business> BusinessList = this.BusinessLocationDictionary.Values.ToList<Business>();



        // Populate the rows to the DataGridView.

        for (int rowIndex = 0; rowIndex < businessCount; rowIndex++)

        {

            DataGridViewRow row = this.BusinessDataGridView.Rows[rowIndex];



            row.Cells[rowIndex].Value = BusinessList.ElementAt(rowIndex);

        }



        this.BusinessDataGridView.DataSource = this.BusinessDataTable;

    }

}

Answer 1

你注釋掉了this.InitializeComponent(); 在你的構造函數中。 如果不調用此方法，將不會生成任何控件。

所以它應該是這樣的：

public BusinessDataWindow(Dictionary<string, Business> BusinessLocationDictionary)
{
            //this.BusinessDataGrid = null;
            this.BusinessLocationDictionary = BusinessLocationDictionary;
            this.initializeDataGridView();
            this.InitializeComponent();
            //this.Loaded += new RoutedEventHandler(DataGrid_Loaded);
}

至於你的錯誤行DataGridViewRow row = this.BusinessDataGridView.Rows[rowIndex]; 這是因為您的 BusinessDataGridView 沒有行。