/// <summary>
/// Creates a differential format in the target based on the source using the sourceIndex
/// </summary>
/// <param name="sourceIndex">Index of the source.</param>
/// <param name="source">The source.</param>
/// <param name="target">The target.</param>
/// <returns></returns>
/// <exception cref="OpenXmlException"></exception>
public static uint CreateDifferentialFormatIndex(uint sourceIndex, Stylesheet source, Stylesheet target)
{
var df = SafeIndex <DifferentialFormats, DifferentialFormat>(source.DifferentialFormats, (int)sourceIndex);
if (df == null)
{
// this really ought to be an exception
// return 0;
throw new OpenXmlException(string.Format("Unable to find CellFormat with index <{0}>", sourceIndex));
}
var cloned = (DifferentialFormat)df.CloneNode(true);
return(target.AddDifferentialFormat(cloned));
}
