C#如何在循环中间避免代码重复

Question

目前，我有两个这样的功能

GenerateDocumentA(DocumentA docA)
{
    OpenDocumentCode();
    for (int i = 0; i < pageCount; i ++)
    {
        // some common per page code, var page = xxx
        SpecificCodeA(docA, page, i);
    }
    CloseDocumentCode();
}

GenerateDocumentB(DocumentB docB)
{
    OpenDocumentCode();
    for (int i = 0; i < pageCount; i ++)
    {
        // some common per page code, var page = xxx
        SpecificCodeB(docB, page, i);
    }
    CloseDocumentCode();
}

我试着去复制代码，看到了这个答案。

https://codereview.stackexchange.com/questions/18379/how-to-remove-code-duplication-that-difference-only-a-few-lines

并且面临一个我不知道如何将变量从两个地方传递到SpecificCode()的问题。

GenerateDocument(Action SpecificCode)
{
    OpenDocumentCode();
    for (int i = 0; i < pageCount; i ++)
    {
        // some common per page code, var page = xxx
        SpecificCode(); // How to pass the current page / page index
    }
    CloseDocumentCode();
}

GenerateDocumentA(DocumentA docA)
{
    GenerateDocument( () => { } ) // how to also pass the DocumentA docA
}

我的问题是:如何定义SpecificCode()并将其传递给GenerateDocument()公共代码，因为知道SpecificCode()将GenerateDocumentA()和GenerateDocument()中的变量作为参数。

Answer 1

GenerateDocument(Action<int,int> todo)
{
    OpenDocumentCode();
    for (int i = 0; i < pageCount; i ++)
    {
        // some common per page code, var page = xxx
        todo(page,i);
    }
    CloseDocumentCode();
}

用例：

DocumentA docA;
GenerateDocument((int page, int i)=>
{
    SpecificCodeA(docA, page, i);
});

DocumentB docB;
GenerateDocument((int page, int i)=>
{
    SpecificCodeB(docB, page, i);
});