从 observablecollection C# 导出到 excel

Question

我正在尝试将 WPF 数据网格导出到 Excel 工作表，但我不断收到错误消息。我找到了这个例子，但我不知道如何从 observablecollection 中导出。在这个例子中，似乎有一个列表。所以我认为我必须从列表转换为 observablecollection，但我做错了。我对 C# 和 WPF 中的功能还很陌生，因此非常感谢任何帮助。

Export WPF DataGrid to Excel

http://www.codeproject.com/Articles/120480/Export-to-Excel-Functionality-in-WPF-DataGrid

我的代码

    private ObservableCollection<T_P> _observableCollection;
    private CollectionViewSource _collectionViewSource;

    public ExportExcel()
    {
        InitializeComponent();


        using (var dc = new DataClasses2DataContext())
        {
            _observableCollection = new ObservableCollection<T_P>(dc.T_Ps);
        }

        _collectionViewSource = (CollectionViewSource)this.FindResource("_T_PViewSource") as CollectionViewSource;
        _collectionViewSource.Source = _observableCollection;


        this.T_P = new T_P();
        this.DataContext = T_P;

    }

    private void btnExportExcel_Click(object sender, RoutedEventArgs e)
    {
        ExportToExcel();
       //some code here?  
    }

// 怎么调用这个类？

    public class ExportToExcel<T>
        where T : class
    {
        public List<T> dataToPrint;
        // Excel object references.
        private Excel.Application _excelApp = null;
        private Excel.Workbooks _books = null;
        private Excel._Workbook _book = null;
        private Excel.Sheets _sheets = null;
        private Excel._Worksheet _sheet = null;
        private Excel.Range _range = null;
        private Excel.Font _font = null;
        // Optional argument variable
        private object _optionalValue = Missing.Value;

//......

Answer 1

您的代码不完整，因此很难判断，但大致如下：

private void btnExportExcel_Click(object sender, RoutedEventArgs e)
{
    var exporter = new ExportToExcel<T_P>()
    {
       dataToPrint = new List<T_P>(_observableCollection);
    };

}