经过一些实验，我最终得到以下代码，用于在MSWord中执行搜索和替换。这段代码在页眉和页脚中也能完美工作，包括页眉和/或页脚在第一页或奇偶页不同的情况。
问题在于，我需要为每个要替换的字符串调用MSWordSearchAndReplaceInAllDocumentParts，这样性能就变得不可接受（对于一个4页的word文档中的约50个字符串，需要2分钟）。理想情况下，它当然应该是“瞬间完成”的。
在处理页眉和页脚之前，我只是在主文档中进行查找和替换（使用wdSeekMainDocument）。在那种情况下，性能是可以接受的（尽管相当慢）。我只是想知道为什么会这么慢：切换视图需要时间吗？通常页眉或页脚只包含很少的单词，所以我预计页眉和页脚中的所有搜索和替换并不会使整体性能变得更糟。但这不是我观察到的。
这是代码，底部放置了分析器结果：
// global variable (just for convenience of posting to Stack Overflow)
var
aWordApp: OLEVariant; // global
// This is the function that is executed once per every string I replace
function MSWordSearchAndReplaceInAllDocumentParts;
begin
try
iseekValue := aWordApp.ActiveWindow.ActivePane.View.SeekView;
iViewType := aWordApp.ActiveWindow.ActivePane.View.Type;
if iViewType <> wdPrintView then
aWordApp.ActiveWindow.ActivePane.View.Type := wdPrintView;
if aWordApp.ActiveDocument.PageSetup.OddAndEvenPagesHeaderFooter then
begin
Try
aWordApp.ActiveWindow.ActivePane.View.SeekView := wdSeekEvenPagesFooter;
SearchAndReplaceInADocumentPart;
Except
// do nothing ..it was not able to set above view
end;
Try
aWordApp.ActiveWindow.ActivePane.View.SeekView := wdSeekEvenPagesHeader;
SearchAndReplaceInADocumentPart;
Except
// do nothing ..it was not able to set above view
end;
end;
if aWordApp.ActiveDocument.PageSetup.DifferentFirstPageHeaderFooter then
begin
Try
aWordApp.ActiveWindow.ActivePane.View.SeekView := wdSeekFirstPageFooter;
SearchAndReplaceInADocumentPart;
Except
// do nothing ..it was not able to set above view
end;
Try
aWordApp.ActiveWindow.ActivePane.View.SeekView := wdSeekFirstPageHeader;
SearchAndReplaceInADocumentPart;
Except
// do nothing ..it was not able to set above view
end;
end;
//Replace in Main Docpart
Try
aWordApp.ActiveWindow.ActivePane.View.SeekView := wdSeekMainDocument;
SearchAndReplaceInADocumentPart;
Except
// do nothing ..it was not able to set above view
end;
//Replace in Header
Try
aWordApp.ActiveWindow.ActivePane.View.SeekView := wdSeekCurrentPageHeader;
SearchAndReplaceInADocumentPart;
Except
// do nothing ..it was not able to set above view
end;
//Replace in Footer
Try
aWordApp.ActiveWindow.ActivePane.View.SeekView := wdSeekCurrentPageFooter;
SearchAndReplaceInADocumentPart;
Except
// do nothing ..it was not able to set above view
end;
//Replace in Header
Try
aWordApp.ActiveWindow.ActivePane.View.SeekView := wdSeekPrimaryHeader;
SearchAndReplaceInADocumentPart;
Except
// do nothing ..it was not able to set above view
end;
//Replace in Footer
Try
aWordApp.ActiveWindow.ActivePane.View.SeekView := wdSeekPrimaryFooter;
SearchAndReplaceInADocumentPart;
Except
// do nothing ..it was not able to set above view
end;
finally
aWordApp.ActiveWindow.ActivePane.View.SeekView := iseekValue;
if iViewType <> wdPrintView then
aWordApp.ActiveWindow.ActivePane.View.Type := iViewType;
end;
end;
// This is the function that performs Search And Replace in the selected View
// it is called once per view
function SearchAndReplaceInADocumentPart;
begin
aWordApp.Selection.Find.ClearFormatting;
aWordApp.Selection.Find.Text := aSearchString;
aWordApp.Selection.Find.Replacement.Text := aReplaceString;
aWordApp.Selection.Find.Forward := True;
aWordApp.Selection.Find.MatchAllWordForms := False;
aWordApp.Selection.Find.MatchCase := True;
aWordApp.Selection.Find.MatchWildcards := False;
aWordApp.Selection.Find.MatchSoundsLike := False;
aWordApp.Selection.Find.MatchWholeWord := False;
aWordApp.Selection.Find.MatchFuzzy := False;
aWordApp.Selection.Find.Wrap := wdFindContinue;
aWordApp.Selection.Find.Format := False;
{ Perform the search}
aWordApp.Selection.Find.Execute(Replace := wdReplaceAll);
end;
这里我贴上了性能分析结果（使用AQtime Pro工具）：
请问你能帮忙找出问题所在吗？