Databinding error 40 dataGrid2d

Question

Due to Two way binding between DataGrid and an array I want to make such a grid, but there is still an error and I don't know how to eliminate it.

Here is all the code:

public partial class MainWindow : Window
{
    private string[,] _data2D;
    public string[,] Data2D
    {
        get { return _data2D; }
        set { _data2D = value; }
    }
    public MainWindow()
    {
        _data2D = new string[9 , 9];
        for (int i = 0; i < 9; i++)
            for (int j = 0; j < 9; j++)
                _data2D[i, j] = "0";
        InitializeComponent();
        dataGrid2D.DataContext = this;
    }
}

And XAML:

<Window x:Class="test.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:test"
        mc:Ignorable="d"
        xmlns:dg2d="clr-namespace:DataGrid2DLibrary;assembly=DataGrid2DLibrary"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <dg2d:DataGrid2D Background="Azure" UseModifiedDataGridStyle="true" HorizontalAlignment="Left" VerticalAlignment="Top" ColumnWidth="30" DataContext="this"
                         RowHeight="30" HeadersVisibility="None" Name="dataGrid2D" ItemsSource2D="{Binding Data2D}"/>
    </Grid>
</Window>

and the error:

System.Windows.Data Error: 40 : 

BindingExpression path error: 

'Data2D' property not found on 'object' ''String' (HashCode=1178749465)'. 

BindingExpression:Path=Data2D; DataItem='String' (HashCode=1178749465);

target element is 'DataGrid2D' (Name='dataGrid2D'); 

target property is 'ItemsSource2D' (type 'IEnumerable')

Anyone knows how to help me? It makes sometimes not all controls rendering :/ Sometimes some control render in half etc.

Yes, it's works but it has error anyway and if there is many controls, sometimes all renders sometimes not. It's because of this binding, when I disabled it, all controls always renders — Blabla, Mar 06 '17 at 15:45

score 1 · Accepted Answer · answered Mar 06 '17 at 16:07

You set DataContext in two places:

In MainWindow():

dataGrid2D.DataContext = this;

And in XAML you have:

DataContext="this"

Delete DataContext property from your XAML:

<dg2d:DataGrid2D Background="Azure" UseModifiedDataGridStyle="true" HorizontalAlignment="Left" VerticalAlignment="Top" ColumnWidth="30" 
                         RowHeight="30" HeadersVisibility="None" Name="dataGrid2D" ItemsSource2D="{Binding Data2D}"/>

Databinding error 40 dataGrid2d

1 Answers1