C# word 2007 奇偶页问题

Question

oWord.ActiveDocument.PageSetup.OddAndEvenPagesHeaderFooter = -1; //奇偶页不同
object oFirstPage = true;
object leftAlign = Word.WdPageNumberAlignment.wdAlignPageNumberLeft;
object rightAlign = Word.WdPageNumberAlignment.wdAlignPageNumberRight;

//奇数页右对齐
oWord.ActiveDocument.Sections[1].Footers[Word.WdHeaderFooterIndex.wdHeaderFooterEvenPages].PageNumbers.Add(ref rightAlign, ref oFirstPage);
oWord.ActiveDocument.Sections[1].Footers[Word.WdHeaderFooterIndex.wdHeaderFooterEvenPages].PageNumbers.NumberStyle = Word.WdPageNumberStyle.wdPageNumberStyleArabic;

//偶数页左对齐
oWord.ActiveDocument.Sections[1].Footers[Word.WdHeaderFooterIndex.wdHeaderFooterPrimary].PageNumbers.Add(ref leftAlign, ref oFirstPage);
oWord.ActiveDocument.Sections[1].Footers[Word.WdHeaderFooterIndex.wdHeaderFooterPrimary].PageNumbers.NumberStyle = Word.WdPageNumberStyle.wdPageNumberStyleArabic;

问题： 结果是页码全左对齐 ，奇偶页没起效果，但是我是分了奇偶页的，如果是我只添加偶数页的页码时，却把奇数页的页码也给添加了

但是下面的那段又是有效的

oWord.ActiveDocument.PageSetup.OddAndEvenPagesHeaderFooter = -1; //奇偶页不同

oWord.ActiveDocument.Sections[1].Footers[Word.WdHeaderFooterIndex.wdHeaderFooterPrimary].Range.InsertBefore("Section 1 Odd Header");
oWord.ActiveDocument.Sections[1].Footers[Word.WdHeaderFooterIndex.wdHeaderFooterPrimary].Range.Paragraphs.Alignment = Word.WdParagraphAlignment.wdAlignParagraphRight;

oWord.ActiveDocument.Sections[1].Footers[Word.WdHeaderFooterIndex.wdHeaderFooterEvenPages].Range.InsertBefore("Section 1 Even Header");
oWord.ActiveDocument.Sections[1].Footers[Word.WdHeaderFooterIndex.wdHeaderFooterEvenPages].Range.Paragraphs.Alignment = Word.WdParagraphAlignment.wdAlignParagraphLeft;

这个页码问题 折腾我好几天了，网上没找到相关答案，求达人解惑啊

Answer 1

对齐常量修改成下面的就可以了
object leftAlign = Word.Word.WdPageNumberAlignment.wdAlignPageNumberInside;
object rightAlign = Word.Word.WdPageNumberAlignment.wdAlignPageNumberOutside;