如何把字符串中的"\\"替换为"\"(string.replace("\\","\")行不通)
如何把字符串中的 "\\ "替换为 "\ "(string.replace( "\\ ", "\ ")行不通)

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string.replace( "\\\\ ", "\\ ")
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str = str.Replace( "\\\\ ", "\\ ");
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str = str.Replace( "\\\\ ", "\\ ");

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str = str.Replace(@ "\\ ",@ "\ ");
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是注意转义字符.
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str = str.Replace( "\\\\ ", "\\ ");
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同意楼上的解释， " "中出现\是转义字符的标志，所以第二个才是真正的\，要弄出1个\就要写2个\，明白了吧？
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str = str.Replace(@ "\\ ",@ "\ ");

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up viena(维也纳N02) shalen520(Love will keep us alive)
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str = str.Replace(@ "\\ ",@ "\ ");