我想将十六进制转换为ASCII [英] I Want Convert Hex to Ascii

问题描述

我想将十六进制转换为ASCII.

I want convert hex to ascii.

我尝试了两种不同的方法.但是我不能成功.

I was try different two methods. But I could not be successful.

方法1:

 public void ConvertHex(String hexString)
    {
        StringBuilder sb = new StringBuilder();

        for (int i = 0; i < hexString.Length; i += 2)
        {
            String hs = hexString.Substring(i, i + 2);
            System.Convert.ToChar(System.Convert.ToUInt32(hexString.Substring(0, 2), 16)).ToString();
        }
        String ascii = sb.ToString();
        StreamWriter wrt = new StreamWriter("D:\\denemeASCII.txt");
        wrt.Write(ascii);

    }

方法2:

 public string HEX2ASCII(string hex)
    {
        string res = String.Empty;
        for (int a = 0; a < hex.Length; a = a + 2)
        {
            string Char2Convert = hex.Substring(a, 2);
            int n = Convert.ToInt32(Char2Convert, 16);
            char c = (char)n;
            res += c.ToString();
        }
        return res;
    }

传入错误消息:(

我该怎么办?

推荐答案

您的"Method1"有几率被重写为可以正常工作.(您的"Method2"绝望了.)

Your "Method1" has a few chances of being rewritten to work. (Your "Method2" is hopeless.)

因此，在"Method1"中，您执行 String hs = hexString.Substring(i，i + 2)，然后您忘记了 hs 曾经存在过.(编译器是否应该对此发出警告?)然后继续执行 System.Convert.ToChar(System.Convert.ToUInt32(hexString.Substring(0，2)，16))，但 hexString.Substring(0，2)将始终选择 hexString 的前两个字符，而不是 i 所指向的两个字符.相反，您可能想做的是: System.Convert.ToChar(System.Convert.ToUInt32(hs，16))

So, in "Method1", you do String hs = hexString.Substring( i, i + 2 ) and then you forget that hs ever existed. (Shouldn't the compiler be giving you a warning about that?) Then you proceed to do System.Convert.ToChar( System.Convert.ToUInt32( hexString.Substring( 0, 2 ), 16 ) ) but hexString.Substring( 0, 2 ) will always pick the first two characters of the hexString, not the two characters pointed by i. What you probably meant to do is this instead: System.Convert.ToChar( System.Convert.ToUInt32( hs , 16) )

此外，您正在声明 StringBuilder sb; ，但从未添加任何内容.同时， System.Convert.ToChar()无效.它返回一个值；如果您对返回值不做任何事情，则返回值将永远丢失.您可能要做的就是将 System.Convert.ToChar()的结果添加到您的 StringBuilder 中.

Also, you are declaring a StringBuilder sb; but you are never adding anything to it. At the same time, System.Convert.ToChar() does not work by side effect; it returns a value; if you don't do anything with the returned value, the returned value is lost forever. What you probably meant to do is add the result of System.Convert.ToChar() to your StringBuilder.

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