public ColumnInfoBase(string headerName, string valueFunction)
{
//if (String.IsNullOrWhiteSpace(headerName)) { throw new ArgumentNullException("headerName"); }
if (valueFunction == null)
{
throw new ArgumentNullException("valueFunction");
}
this.HeaderName = headerName;
this.CleanHeaderName = FileIOUtilities.FixupHeader(this.HeaderName);
this.ValueFunctionString = valueFunction;
this.CellType = ExcelCellType.General;
}
public ColumnInfo(string headerName, Expression <Func <T, object> > valueFunction)
{
//if (String.IsNullOrWhiteSpace(headerName)) { throw new ArgumentNullException("headerName"); }
if (valueFunction == null)
{
throw new ArgumentNullException("valueFunction");
}
this.HeaderName = headerName;
this.CleanHeaderName = FileIOUtilities.FixupHeader(this.HeaderName);
this.ValueFunction = valueFunction.Compile();
var type = FileIOUtilities.GetExpressionType <T>(valueFunction);
var notNullType = Nullable.GetUnderlyingType(type);
this.ValueFunctionType = notNullType ?? type;
this.CellType = ExcelCellType.General;
}