Question

我有一个DataTable，我想将第一行和第一行更改为RowHeaders和ColumnHeaders中我在方法'PopUp'中设置的元素。但是，当我运行程序时，DataTable为空。为什么？

cs-file：

namespace myNameSpace
        {
            /// <summary>
            /// Interaction logic for PopUp.xaml
            /// </summary>
            public partial class PopUp : Window
            {            


                public string[] RowHeaders { get; set; }
                public string[] ColumnHeaders { get; set; }
                public ResultPopUp(Array[] Result, List<int> Vb1, List<int> Vb)
                {
                    InitializeComponent();
                    RowHeaders = new string[Vb.Count];
                    for (int i = 0; i < Vb.Count; i++)
                    {
                        RowHeaders[i] = Vb[i];
                    }

                    ColumnHeaders = new string[Vb1.Count];
                    for (int j = 0; j < Vb1.Count; j++)
                    {
                        ColumnHeaders[j] = Vb1[j];
                    }
                }

            }

                public class MatrixToDataViewConverter : IMultiValueConverter
                {
                    public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
                    {
                        var myDataTable = new DataTable();

                        var columns = values[0] as string[];
                        var rows = values[1] as string[];
                        myDataTable.Columns.Add("---"); //Upper left corner
                        foreach (var value in columns)
                        {
                            myDataTable.Columns.Add(value);
                        }


                        foreach (var value in rows)
                        {
                            myDataTable.Rows.Add(value);
                        }

                        return myDataTable.DefaultView;
                    }


                    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
                    {
                        throw new NotImplementedException();
                    }
                }
        }

xaml：

<Grid>
        <DataGrid>
            <DataGrid.ItemsSource>
                <MultiBinding Converter="{StaticResource MatrixToDataViewConverter}">
                    <Binding Path="ColumnHeaders"/>
                    <Binding Path="RowHeaders"/>
                    <Binding Path="Values"/>
                </MultiBinding>
        </DataGrid.ItemsSource>
      </DataGrid>
    </Grid>

Answer 1

我设法自己搞清楚了。问题是源绑定没有提供转换的价值。我只需要在我的xaml代码中将'ElementName="theNameOfMyWindow"'添加到'<Binding Path="..."/>，现在它完美无缺。但感谢所有试图帮助我的人，我真的很感激！

DataTable不显示任何数据c＃

1 个答案: