C# WPF datagrid how to add a different line

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I have a datagrid which is MANUALLY created through a similar code

C#

for (int row= 0; row< totRows; row++)
{
    dynamic newRow = new ExpandoObject();
    for (int col = 0; col < numTotCol; col++)
    {
        string strColumnHeader = columnLabels[col].Replace(' ', '_');
        ((IDictionary<String, Object>)newRow)[strColumnHeader] = ...
    }
    dtgResults.Items.Add(newRow);
}

what I need now is something that in MS Excel is described as mergin columns.
In short I need to add a "comment line" when necessary. That line has to be way larger but has not to change the other columns. That is it has to accomodate on more columns.

What I have tried:

What I have tried is to use the d DataGridCell_Load event.
I thought about something like that:

C#

if (row == 3 && column == 0)
{
	cell.Width = 300;
	cell.Content = "AAAAA A A AA A A A A A AQ A A AA A A A A A A";
}

but that didn't change anything: the line in question has the first row which is always the same width.

Thank you in advance.

Posted 16-May-16 21:13pm

Patrick70__

Updated 17-May-16 0:15am

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RickZeeland · Answer 1 · 2016-05-17T00:15:00

Do not create the datagrid manually but use ObservableCollection.
This way you can easily manipulate values in code behind, changes work both ways.
Here is an example for a ListView:

C#

private ObservableCollection<MyListViewItem> myListViewItems = new ObservableCollection<MyListViewItem>();

ListView1.ItemsSource = this.myListViewItems;

public class MyListViewItem     
{
    public MyListViewItem()
    {
    }

    public MyListViewItem(string name, string value, string group, string tag, SolidColorBrush color)
    {
        this.Name = name;
        this.Value = value;
        this.Group = group;
        this.Tag = tag;
        this.StatusColor = color;
    }

    public string Name { get; set; }

    public string Value { get; set; }

    public string Group { get; set; }

    public string Tag { get; set; }

    public SolidColorBrush StatusColor { get; set; }
}

C# WPF datagrid how to add a different line

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C# WPF datagrid how to add a different line

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