标签：abc puts little doc 类型 返回 OLE NPU 开头
下表列出了 BitConverter 类中将字节（来自字节数组）转换为其他内置类型的方法。
| 返回类型 | 方法 |
|---|---|
bool |
ToBoolean(Byte[], Int32) |
char |
ToChar(Byte[], Int32) |
double |
ToDouble(Byte[], Int32) |
short |
ToInt16(Byte[], Int32) |
int |
ToInt32(Byte[], Int32) |
long |
ToInt64(Byte[], Int32) |
float |
ToSingle(Byte[], Int32) |
ushort |
ToUInt16(Byte[], Int32) |
uint |
ToUInt32(Byte[], Int32) |
ulong |
ToUInt64(Byte[], Int32) |
将字节数组转换为整型：
byte[] bytes = { 0, 0, 0, 25 }; // If the system architecture is little-endian (that is, little end first), // reverse the byte array. if (BitConverter.IsLittleEndian) Array.Reverse(bytes); int i = BitConverter.ToInt32(bytes, 0); Console.WriteLine("int: {0}", i); // Output: int: 25
将整型转换为字节数组：
byte[] bytes = BitConverter.GetBytes(201805978); Console.WriteLine("byte array: " + BitConverter.ToString(bytes)); // Output: byte array: 9A-50-07-0C
可以使用 Convert 类中的方法或使用各种数值类型（int、long、float 等）中的 Parse()、TryParse() 方法将字符串转换为数字。如果字符串的格式无效，则 Parse() 会引发异常，而 TryParse() 会返回 false。
Parse 和 TryParse 方法会忽略字符串开头和末尾的空白符，但其他所有字符都必须是组成合适数值类型（int、long、ulong、float、decimal 等）的字符。 如果组成数字的字符中有任何空白符，都会导致错误出现。
实际上，Convert.ToUInt32 方法在内部使用 Parse。
try { int m = Int32.Parse("abc"); } catch (FormatException e) { Console.WriteLine(e.Message); } // Output: Input string was not in a correct format. ----------------------------------------------------------------------------- string inputString = "abc"; bool parsed = int.TryParse(inputString, out int numValue); if (!parsed) Console.WriteLine("Int32.TryParse could not parse ‘{0}‘ to an int.\n", inputString); else Console.WriteLine($"Convert the string to num: {numValue}"); // Output: Int32.TryParse could not parse ‘abc‘ to an int.
下表列出了 Convert 类中可使用的一些方法，例如： numVal = Convert.ToInt32(input);
| 数值类型 | 方法 |
|---|---|
| decimal | ToDecimal(String) |
| float | ToSingle(String) |
| double | ToDouble(String) |
| short | ToInt16(String) |
| int | ToInt32(String) |
| long | ToInt64(String) |
| ushort | ToUInt16(String) |
| uint | ToUInt32(String) |
| ulong | ToUInt64(String) |
string input = "Hello World!"; char[] values = input.ToCharArray(); foreach (char letter in values) { // Get the integral value of the character. int value = Convert.ToInt32(letter); // Convert the decimal value to a hexadecimal value in string form. string hexOutput = String.Format("{0:X}", value); Console.WriteLine("Hexadecimal value of {0} is {1}", letter, hexOutput); } // Output: // Hexadecimal value of H is 48 ...
string hexValues = "48 65 6C 6C 6F 20 57 6F 72 6C 64 21"; string[] hexValuesSplit = hexValues.Split(‘ ‘); foreach (string hex in hexValuesSplit) { // Convert the number expressed in base-16 to an integer. int value = Convert.ToInt32(hex, 16); // Get the character corresponding to the integral value. string stringValue = Char.ConvertFromUtf32(value); char charValue = (char)value; Console.WriteLine("hexadecimal value = {0}, int value = {1}, char value = {2} or {3}", hex, value, stringValue, charValue); } // Output: // hexadecimal value = 48, int value = 72, char value = H or H ...
string hexString = "8E2"; int num = Int32.Parse(hexString, System.Globalization.NumberStyles.HexNumber); Console.WriteLine(num); //Output: 2274
string hexString = "43480170"; uint num = uint.Parse(hexString, System.Globalization.NumberStyles.AllowHexSpecifier); byte[] floatVals = BitConverter.GetBytes(num); float f = BitConverter.ToSingle(floatVals, 0); Console.WriteLine("float convert = {0}", f); // Output: 200.0056
byte[] vals = { 0x01, 0xAA, 0xB1, 0xDC, 0x10, 0xDD }; string str = BitConverter.ToString(vals); Console.WriteLine(str); str = BitConverter.ToString(vals).Replace("-", ""); Console.WriteLine(str); /*Output: 01-AA-B1-DC-10-DD 01AAB1DC10DD */
标签：abc puts little doc 类型 返回 OLE NPU 开头
原文地址：https://www.cnblogs.com/brt3/p/9736473.html
