Hello Michael,

this blog has nothing in common with my question.

I was asking for varying headers of child records. The field names are static the headers(Field.Labels) have to be dynamic.

Regards Horst

Hello Michal,

sorry I need to add to this thread again....

There is a problem with this solution.

If you open a FieldChooser related to this DataGrid the field using the dynamic label will show blank.

Even if you return a constant string from the Converter class.

Any solution to this problem?

Regards Horst

Hello Michael,

sorry, I need to come back to this thread....

I now have the problem that with such a design if you open a FieeldChooser it will show a blank item for the dynamic Label even if you default to a constant string in the Converter Class.

Regards Horst

Hello Michael,

great, this works exacly as expected!

regards Horst

Hello Michael,

to illustrate better what I mean here the grid with the current layout:

The "Area" field needs to have a varying header label according to the signal.

I am currently setting the grid during an update process caused by some internal state changes:

        /// <summary>
        /// Redisplay if calibrations changed
        /// </summary>
        private void Update(object sender, EventArgs e)
        {
            Dispatcher.Invoke(() =>
            {
                RunsTable.DataSource = null;
                RunsTable.DataSource = Project.CalculationRuns;
                AttachedResultsGraph.UpdateSeries();
            });
        }

To update the labels of the "Area" field i am currently using a rather crude work arround:

        /// <summary>
        /// Show/hide signal names depending on run and
        /// Check if signal requires different area display and create new cloned layout accordingly
        /// </summary>
        private void RunsTable_AssigningFieldLayoutToItemDirect(object sender, AssigningFieldLayoutToItemEventArgs e)
        {
            Run run = e.Item as Run;
            if (run != null)
            {
                if (run.QuantitativeMultipleSignals)
                {
                    e.FieldLayout = RunsTable.FieldLayouts["MultipleSignals"];
                }
                else
                {
                    e.FieldLayout = RunsTable.FieldLayouts["SingleSignal"];
                }
            }
            Peak peak = e.Item as Peak;
            if (peak != null)
            {
                FieldLayout defaultLayout = RunsTable.FieldLayouts["Peak"];
                string areaUnit = "V s";
                Trace trace = peak.ParentTrace;
                if (string.IsNullOrEmpty(trace.AreaUnit) || trace.AreaUnit == areaUnit)
                {
                    return;
                }
                if (trace != null)
                {
                    areaUnit = trace.AreaUnit;
                    FieldLayout existing = null;
                    foreach (FieldLayout fieldLayout in RunsTable.FieldLayouts)
                    {
                        if (fieldLayout.Key.ToString() == areaUnit)
                        {
                            existing = fieldLayout;
                            break;
                        }
                    }
                    if (existing != null)
                    {
                        e.FieldLayout = existing;
                    }
                    else
                    {
                        FieldLayout layout = new FieldLayout();
                        layout.Key = areaUnit;
                        foreach (Field field in defaultLayout.Fields)
                        {
                            Field clonedField = null;
                            if (field is TextField) clonedField = new TextField();
                            if (field is NumericField) clonedField = new NumericField();
                            clonedField.Name = field.Name;
                            clonedField.Format = field.Format;
                            clonedField.Width = field.Width;
                            clonedField.LabelTextAlignment = field.LabelTextAlignment;
                            clonedField.HorizontalContentAlignment = field.HorizontalContentAlignment;
                            clonedField.AllowEdit = field.AllowEdit;
                            clonedField.AllowSorting = field.AllowSorting;
                            clonedField.Visibility = field.Visibility;
                            clonedField.ToolTip = field.ToolTip;
                            clonedField.Settings.LabelPresenterStyle = field.Settings.LabelPresenterStyle;
                            if (field.Name == "Area")
                            {
                                clonedField.Label = "Area\r[" + areaUnit + "]";
                            }
                            else
                            {
                                clonedField.Label = field.Label;
                            }
                            layout.Fields.Add(clonedField);
                        }
                        RunsTable.FieldLayouts.Add(layout);
                        e.FieldLayout = layout;
                    }
                    e.Handled = true;
                }
            }
        }

This approach looks for changes in the desired label and clones a new layout if no match found.

I think one can find a more elegant solution.

regards Horst