[英]How to bind an 2D array bool[][] to a WPF DataGrid (one-way)?
I have a matrix kind datagrid like this. 我有像这样的矩阵类数据网格。
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 ? 现在如何使用二维数组将值插入到这些datagridcell中? the values which is needed to be inserted must be of bool
datatype (either TRUE or FALSE). 需要插入的值必须是bool
数据类型(TRUE或FALSE)。 Any ideas ? 有任何想法吗 ?
Here is my approach for a MVVM scenario, using a converter which creates a DataView which can be bound to the grids ItemsSource
. 这是我对MVVM场景的方法,使用转换器创建一个可以绑定到网格ItemsSource
的DataView。 It's for a special Matrix datatype which holds doubles, but you'll be able to modify it yourself for your requirements: 它是一个特殊的Matrix数据类型,它包含双精度数,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... 它不允许双向绑定,但......
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. 这就是它在原始版本中的样子。 You can then style the DataGrid and edit it's templates, but this is another question... 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......
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