c# ascii加密和解密

小渣渣 · 发表于 2016-8-9 10:19:29

/// <summary>
/// ascii加密
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
private string AsciiEncryption(string text, string parameter)
{
StringBuilder sb = new StringBuilder();
foreach (char c in text)
{
// Get the integral value of the character.
int value = Convert.ToInt32(c);
// Convert the decimal value to a hexadecimal value in string form.
int temp = Int32.Parse(parameter, System.Globalization.NumberStyles.HexNumber); //16进制转10进制差值
string hexOutput = String.Format("{0:X}", value + temp); //16进制数据 16进制加30 10进制加48
sb.Append(hexOutput);
}
return sb.ToString();
}

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/// <summary>
/// Ascii解密
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
private string AsciiDecryption(string text)
{
int temp = Int32.Parse("30", System.Globalization.NumberStyles.HexNumber); //16进制转10进制差值
StringBuilder sb = new StringBuilder();
for (int i = 0; i < text.Length; i += 2)
{
string str = text.Substring(i, 2); //16进制
int x10 = Int32.Parse(str, System.Globalization.NumberStyles.HexNumber); //16进制转10进制
//ToString("x8") 10进制转16进制
string result = ((char)int.Parse((x10 - temp).ToString("x8"), System.Globalization.NumberStyles.HexNumber)).ToString();
sb.Append(result);
}
return sb.ToString();
}

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自己参照着网上的写的，代码应该还可以精简，还有其他写法。。。。

大家自己研究吧。。。

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