如何获取给定ascii代码的ascii字符。
e.g。我正在寻找一种方法,给出代码65将返回“A”。
由于
答案 0 :(得分:130)
你的意思是“A”(一个string
)或'A'(一个char
)?
int unicode = 65;
char character = (char) unicode;
string text = character.ToString();
请注意,我将Unicode而不是ASCII称为C#的本机字符编码;基本上每个char
都是UTF-16代码点。
答案 1 :(得分:34)
string c = Char.ConvertFromUtf32(65);
c将包含“A”
答案 2 :(得分:10)
这适用于我的代码。
string asciichar = (Convert.ToChar(65)).ToString();
返回:asciichar = 'A';
答案 3 :(得分:4)
有几种方法可以做到这一点。
使用char struct(to string and back)
string _stringOfA = char.ConvertFromUtf32(65);
int _asciiOfA = char.ConvertToUtf32("A", 0);
只需转换值(显示的字符串和字符串)
char _charA = (char)65;
string _stringA = ((char)65).ToString();
使用ASCIIEncoding。
这可以在循环中用于执行整个字节数组
var _bytearray = new byte[] { 65 };
ASCIIEncoding _asiiencode = new ASCIIEncoding();
string _alpha = _asiiencode .GetString(_newByte, 0, 1);
您可以覆盖类型转换器类,这将允许您对值进行一些奇特的验证:
var _converter = new ASCIIConverter();
string _stringA = (string)_converter.ConvertFrom(65);
int _intOfA = (int)_converter.ConvertTo("A", typeof(int));
这是班级:
public class ASCIIConverter : TypeConverter
{
// Overrides the CanConvertFrom method of TypeConverter.
// The ITypeDescriptorContext interface provides the context for the
// conversion. Typically, this interface is used at design time to
// provide information about the design-time container.
public override bool CanConvertFrom(ITypeDescriptorContext context,
Type sourceType)
{
if (sourceType == typeof(string))
{
return true;
}
return base.CanConvertFrom(context, sourceType);
}
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
{
if (destinationType == typeof(int))
{
return true;
}
return base.CanConvertTo(context, destinationType);
}
// Overrides the ConvertFrom method of TypeConverter.
public override object ConvertFrom(ITypeDescriptorContext context,
CultureInfo culture, object value)
{
if (value is int)
{
//you can validate a range of int values here
//for instance
//if (value >= 48 && value <= 57)
//throw error
//end if
return char.ConvertFromUtf32(65);
}
return base.ConvertFrom(context, culture, value);
}
// Overrides the ConvertTo method of TypeConverter.
public override object ConvertTo(ITypeDescriptorContext context,
CultureInfo culture, object value, Type destinationType)
{
if (destinationType == typeof(int))
{
return char.ConvertToUtf32((string)value, 0);
}
return base.ConvertTo(context, culture, value, destinationType);
}
}
答案 4 :(得分:1)
也可以用其他方式完成
byte[] pass_byte = Encoding.ASCII.GetBytes("your input value");
然后打印结果。使用foreach
循环。
答案 5 :(得分:0)
抱歉,我不认识Java,但今晚我遇到了同样的问题,所以我写了这个(它在c#中)
public string IncrementString(string inboundString) {
byte[] bytes = System.Text.Encoding.ASCII.GetBytes(inboundString.ToArray);
bool incrementNext = false;
for (l = -(bytes.Count - 1); l <= 0; l++) {
incrementNext = false;
int bIndex = Math.Abs(l);
int asciiVal = Conversion.Val(bytes(bIndex).ToString);
asciiVal += 1;
if (asciiVal > 57 & asciiVal < 65)
asciiVal = 65;
if (asciiVal > 90) {
asciiVal = 48;
incrementNext = true;
}
bytes(bIndex) = System.Text.Encoding.ASCII.GetBytes({ Strings.Chr(asciiVal) })(0);
if (incrementNext == false)
break; // TODO: might not be correct. Was : Exit For
}
inboundString = System.Text.Encoding.ASCII.GetString(bytes);
return inboundString;
}
答案 6 :(得分:0)
只需尝试:
int n = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("data is: {0}", Convert.ToChar(n));
答案 7 :(得分:-1)
我相信一个简单的演员可以工作
int ascii = (int) "A"
答案 8 :(得分:-1)
这是一个适用于所有256个字节的函数,并确保您将看到每个值的字符:
static char asciiSymbol( byte val )
{
if( val < 32 ) return '.'; // Non-printable ASCII
if( val < 127 ) return (char)val; // Normal ASCII
// Workaround the hole in Latin-1 code page
if( val == 127 ) return '.';
if( val < 0x90 ) return "€.‚ƒ„…†‡ˆ‰Š‹Œ.Ž."[ val & 0xF ];
if( val < 0xA0 ) return ".‘’“”•–—˜™š›œ.žŸ"[ val & 0xF ];
if( val == 0xAD ) return '.'; // Soft hyphen: this symbol is zero-width even in monospace fonts
return (char)val; // Normal Latin-1
}