如何将二维数组 bool[][] 绑定到 WPF DataGrid（单向）？

How to bind an 2D array bool[][] to a WPF DataGrid (one-way)?

提问by Indhi

I have a matrix kind datagrid like this.

我有一个像这样的矩阵类型的数据网格。

this grid is designed entirely in XAML

这个网格完全是用 XAML 设计的

Now how to insert values into these datagridcell with 2 dimensional array ? the values which is needed to be inserted must be of booldatatype (either TRUE or FALSE). Any ideas ?

现在如何使用二维数组将值插入到这些 datagridcell 中？需要插入的值必须是bool数据类型（TRUE 或 FALSE）。有任何想法吗 ？

回答by Marc

Here is my approach for a MVVM scenario, using a converter which creates a DataView which can be bound to the grids ItemsSource. It's for a special Matrix datatype which holds doubles, but you'll be able to modify it yourself for your requirements:

这是我针对 MVVM 场景的方法，使用转换器创建可以绑定到 grids 的 DataView ItemsSource。它用于一种特殊的 Matrix 数据类型，它包含双打，但您可以根据自己的要求自行修改它：

public class MatrixToDataViewConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var array = value as Matrix;
        if (array == null) return null;

        //var array = ILMath.rand(3, 5);

        var rows = array.Dimensions[0];
        var columns = array.Dimensions[1];

        var t = new DataTable();
        for (var c = 0; c < columns; c++)
        {
            t.Columns.Add(new DataColumn(c.ToString()));
        }

        for (var r = 0; r < rows; r++)
        {
            var newRow = t.NewRow();
            for (var c = 0; c < columns; c++)
            {
                var v = array[r, c];

                // Round if parameter is set
                if (parameter != null)
                {
                    int digits;
                    if (int.TryParse(parameter.ToString(), out digits))
                        v = Math.Round(v, digits);
                }

                newRow[c] = v;
            }

            t.Rows.Add(newRow);
        }


        return t.DefaultView;
    }

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

Define a resource for the converter:

为转换器定义一个资源：

<converter:MatrixToDataViewConverter x:Key="MatrixToDataViewConverter" />

And use it like this:

并像这样使用它：

<DataGrid ItemsSource="{Binding Matrix, Converter={StaticResource MatrixToDataViewConverter}, ConverterParameter=1}"/>

It doesn't allow two way binding, though...

但是它不允许双向绑定...

EDIT

编辑

Here's the version for an array bool[][]:

这是数组 bool[][] 的版本：

public class BoolArrayToDataViewConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var array = value as bool[,];
        if (array == null) return null;

        var rows = array.GetLength(0);
        if (rows == 0) return null;

        var columns = array.GetLength(1);
        if (columns == 0) return null;

        var t = new DataTable();

        // Add columns with name "0", "1", "2", ...
        for (var c = 0; c < columns; c++)
        {
            t.Columns.Add(new DataColumn(c.ToString()));
        }

        // Add data to DataTable
        for (var r = 0; r < rows; r++)
        {
            var newRow = t.NewRow();
            for (var c = 0; c < columns; c++)
            {
                newRow[c] = array[r, c];
            }
            t.Rows.Add(newRow);
        }

        return t.DefaultView;
    }

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

and the usage:

和用法：

<DataGrid ItemsSource="{Binding Matrix, Converter={StaticResource BoolArrayToDataViewConverter}}"/>

And this is what it looks like in the very raw version. You can then style the DataGrid and edit it's templates, but this is another question...

这就是原始版本中的样子。然后您可以设置 DataGrid 的样式并编辑它的模板，但这是另一个问题......