Control a Datagrid from another class

Question

Hello Community,

 

i have a problem with one part of my current project.

 

I have post it in this category because i Think it´s no problem from the WPF-Side...I have to be a problem with my C#-Code...But I didn´t know where is it... 

 

I have to control a Datagrid from another class

 

For better overview I have eliminated some of my code, but this is not important for the problem.

 

Here is my current Code from the Usercontrol. Here is my Datagrid inside:

<UserControl x:Class="Lagerverwaltung_V3_0_Ribbon.MainFrame.TabItemArticle"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:local="clr-namespace:Lagerverwaltung_V3_0_Ribbon.MainFrame"
             xmlns:control = "clr-namespace:Lagerverwaltung_V3_0_Ribbon.Article">
    <StackPanel>
        <Button Height="20" Content="Test" Click="Button_Click"/>
        <DataGrid x:Name="dgArticle" AutoGenerateColumns="False" HeadersVisibility="None" IsReadOnly="True">
            <DataGrid.Columns>
                <DataGridTemplateColumn Width="*">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                                            <!--Articlenumber-->
                                            <Label Name="ArticleID" Grid.Column="1" Content="{Binding ArticleID}" Margin="10,0,10,0" VerticalAlignment="Center"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
            </DataGrid.Columns>
        </DataGrid>
    </StackPanel>
</UserControl>

 and the C# Code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Lagerverwaltung_V3_0_Ribbon.MainFrame
{
    public partial class TabItemArticle : UserControl
    {
        public TabItemArticle()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            var data = new Test
            {
                ArticleID = "#00010000",
            };


            dgArticle.Items.Add(data);
        }
        public class Test
        {
            public string ArticleID { get; set; }
        }
    }
}

 

And this is the Form where i want to Control it (my Main Window): 

<Window x:Class="Lagerverwaltung_V3_0_Ribbon.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:Microsoft_Windows_Themes="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Classic"
        xmlns:TabItemGrid="clr-namespace:Lagerverwaltung_V3_0_Ribbon.MainFrame"
        xmlns:local="clr-namespace:System.Windows.Controls;assembly=PresentationFramework"
        xmlns:system="clr-namespace:System;assembly=mscorlib"
        Title="Employee Info" Width="1400" Height="768">
<TabControl TabStripPlacement="Left" VerticalAlignment="Stretch" BorderBrush="#FF6593CF" BorderThickness="1,1,1,0" Style="{DynamicResource OutlookTabControlStyle}" SelectionChanged="TabControl_SelectionChanged">
                              <TabItem x:Name="MainWindow_SideControl_TabItem_Article" Header="Article">

                   <ScrollViewer VerticalScrollBarVisibility="Auto">


                        <!-- Here the user control is imported -->
                        <TabItemGrid:TabItemArticle x:Name="tabItem_Article"/>


                    </ScrollViewer>

                </TabItem>
            </TabControl>
            <Button Height="20" Label="TestButton" Click="RibbonButton_Click" />
</Window>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Controls.Ribbon;
using System.Threading;

namespace Lagerverwaltung_V3_0_Ribbon
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

        }

        public class Test
        {
            public string ArticleID { get; set; }
        }


        private void RibbonButton_Click(object sender, RoutedEventArgs e)
        {
            MainFrame.TabItemArticle TabArticle = new MainFrame.TabItemArticle();
            var data = new Test
            {
                ArticleID = "#00010000",
            };

            TabArticle.dgArticle.Items.Add(data);
        }
    }
}

 My Problem is, that i can´t add a row to the datagrid with the button from the MainWindow.

Add a Row from the 'MainFrame.TabItemArticle' Control is no problem.

 

I hope you can understand my problem despite my bad english ...

 

Thank you for tips or other...

 

Greetings from Germany

 

Kai Listner