如何使用C＃更改Excel数据标签的背景颜色

Question

I am trying to change the shape of excel data label using C#. But I am stuck with interop Fill Property .

Not able to understand at all how to use it and also how can I change the shape of data label using this. If anyone has any idea Please help.

Your help will be appreciated. I am using it in Line chart.

I have tried this so far-

System.Collections.IEnumerator iEChartSeries = seriesCollection.GetEnumerator();
if(iEChartSeries.MoveNext()){
    var oSeries = (Excel.Series)(iEChartSeries.Current);
    Excel.Points pts = (Excel.Points) oSeries.Points(Type.Missing);
    System.Collections.IEnumerator iPoints = pts.GetEnumerator();
    while(iPoints.MoveNext())
    {
        var pt = (Excel.Point)(iPoints.Current);
        pt.HasDataLabel = true;
        pt.DataLabel.Position = Excel.XlDataLabelPosition.xlLabelPositionAbove;

        pt.DataLabel.Font.Name = "Arial";
        pt.DataLabel.Font.FontStyle = "Bold";
        pt.DataLabel.Font.Size = 8;   
        pt.DataLabel.Text = "N";    
        pt.DataLabel.Fill = ????;//here I am stuck
    }
}

Answer 1

Your line: pt.DataLabel.Fill = ????; //here I am stuck pt.DataLabel.Fill = ????; //here I am stuck

You need this: pt.DataLabel.Format.Fill.ForeColor.RGB = ???