如何绑定一个二维数组布尔[] []对WPF的DataGrid(单程)? [英] How to bind an 2D array bool[][] to a WPF DataGrid (one-way)?
问题描述
我有一个矩阵一种数据网格这样的。
I have a matrix kind datagrid like this.
本格在XAML设计完全
this grid is designed entirely in XAML
现在如何插入值到这些datagridcell与2维数组?
这是需要插入的值必须是布尔
的数据类型(TRUE或FALSE)的。
任何想法?
Now how to insert values into these datagridcell with 2 dimensional array ?
the values which is needed to be inserted must be of bool
datatype (either TRUE or FALSE).
Any ideas ?
推荐答案
下面是我的一个MVVM场景的方法,使用它创建一个数据视图一个转换器,它可以被绑定到网格的ItemsSource
。这对于持有双打特殊矩阵的数据类型,但你可以自己修改它为您的要求:
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:
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();
}
}
定义为转换器的资源:
<converter:MatrixToDataViewConverter x:Key="MatrixToDataViewConverter" />
和使用这样的:
<DataGrid ItemsSource="{Binding Matrix, Converter={StaticResource MatrixToDataViewConverter}, ConverterParameter=1}"/>
它不允许双向绑定,但...
It doesn't allow two way binding, though...
修改
下面是版本的数组布尔[] []:
Here's the version for an array bool[][]:
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();
}
}
和用法:
<DataGrid ItemsSource="{Binding Matrix, Converter={StaticResource BoolArrayToDataViewConverter}}"/>
这是它看起来像在非常原始的版本。然后,您可以将样式DataGrid和编辑它的模板,但这是另外一个问题...
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...
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