B. *_*non 3 c# string escaping zebra-printers verbatim-string
逃避或逐字逐句,这是我的问题.
我需要以编程方式将一些命令发送到C#中的(Zebra QLn220)打印机,具体如下:
! U1 setvar "power.dtr_power_off" "off"
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-和:
! U1 setvar "media.sense_mode" "gap"
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由于这些命令中有过多的引号,我认为使用逐字字符串是明智的.但基于此,我仍然需要加倍引号,因此它可能/理论上需要像:
string dontShutErOff = @"! U1 setvar """power.dtr_power_off""" """off"""";
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......看起来像是由Don King,Coding Horror的猫和Groucho Marx组成的混搭.
以这种方式逃避引号会更好吗:
string dontShutErOff = "! U1 setvar \"power.dtr_power_off\" \"off\"";
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?
我应该逃离Verbatimtraz吗?
基于Eric Lippert的第一个建议,如何:
const string quote = "\"";
string whatever = string.Format("! U1 setvar {0}power.dtr_power_off{0} {0}off{0}", quote);
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我会考虑第三种选择:
const string quote = "\"";
string whatever = "! U1 setvar " +
quote + "power.dtr_power_off" + quote + " " +
quote + "off" + quote;
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或者第四个:
static string Quote(string x)
{
const string quote = "\"";
return quote + x + quote;
}
...
string whatever = "! U1 setvar " + Quote("power.dtr_power_off") + " " + Quote("off");
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所有这些都有利有弊; 没有一个是最好的.