我应该创建另一个变量而不是3个显式强制转换吗？

Question

这是速度问题.我有以下代码:

if (MyXMLReader.SearchForValue(command, new List<string>() { "/Command/Descriptions/Description/System" }, ((TabDocument)dockManager.ActiveDocument).version))
{
    txtBox_desc.Text = MyXMLReader.GetValue(command, "/Command/Descriptions/Description[" + MyXMLReader.SearchForValue_Int(command, new List<string>() { "/Command/Descriptions/Description/System" }, ((TabDocument)dockManager.ActiveDocument).version) + "]/Content");
}
if (MyXMLReader.SearchForValue(command, new List<string>() { "/Command/Uses/Use/System" }, ((TabDocument)dockManager.ActiveDocument).version))
{
    txtBox_use.Text = MyXMLReader.GetValue(command, "/Command/Uses/Use[" + MyXMLReader.SearchForValue_Int(command, new List<string>() { "/Command/Uses/Use/System" }, ((TabDocument)dockManager.ActiveDocument).version) + "]/Content");
}
if (MyXMLReader.SearchForValue(command, new List<string>() { "/Command/Notes/Note/System" }, ((TabDocument)dockManager.ActiveDocument).version))
{
    txtBox_notes.Text = MyXMLReader.GetValue(command, "/Command/Notes/Note[" + MyXMLReader.SearchForValue_Int(command, new List<string>() { "/Command/Notes/Note/System" }, ((TabDocument)dockManager.ActiveDocument).version) + "]/Content");
}

我应该创建一个新string变量来保存

((TabDocument)dockManager.ActiveDocument).version?

这会有更快的速度和响应能力吗？这会是坏事还是好事？

Answer 1

简而言之,是的.

反复投射ActiveDocument到的成本TabDocument可能可以忽略不计,但如果您希望优化,将其存储到中间变量是迈向积极的一步.

但为什么你真的应该这样做,是为了代码可读性.