c# - Why does the merging of identical columns not work in my datagrid in WPF?

Question

I have a DataGrid in WPF where I read the data from an SQL query.I use a DataTable. But now I want all identical lines to be brought together. I thought of the following:

<DataGrid.Columns>
                <DataGridTemplateColumn Width="*">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <Grid>
                                <TextBlock VerticalAlignment="Center" Text="{Binding Name}"/>
                            </Grid>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
                <DataGridTemplateColumn  Width="*">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <DataGrid ItemsSource="{Binding Items}" IsReadOnly="True" AutoGenerateColumns="False" HeadersVisibility="None">
                                <DataGrid.Columns>
                                    <DataGridTemplateColumn Width="*">
                                        <DataGridTemplateColumn.CellTemplate>
                                            <DataTemplate>
                                                <TextBlock Text="{Binding Name}"/>
                                            </DataTemplate>
                                        </DataGridTemplateColumn.CellTemplate>
                                    </DataGridTemplateColumn>
                                </DataGrid.Columns>
                            </DataGrid>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
            </DataGrid.Columns>

and in CS this:

    private void datagrid_Loaded(object sender, RoutedEventArgs e)
    {
        var groups = (this.Resources["CvsKey"] as CollectionViewSource).View.Groups;
        datagrid.ItemsSource = groups;
    }

But then he creates 2 empty columns. I do not want the 2 new columns to be created, but that the existing ones are merged. The available columns are generated by my SQL query using a DataTable.

question from:https://stackoverflow.com/questions/65916749/why-does-the-merging-of-identical-columns-not-work-in-my-datagrid-in-wpf

Answer 1

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