C# | BitConverter。ToInt16()方法
原文:https://www . geesforgeks . org/c-sharp-bit converter-to int 16-method/
此方法用于返回从字节数组中指定位置的两个字节转换而来的 16 位有符号整数。
语法:
public static short ToInt16 (byte[] value, int startIndex);
参数:
值:是字节数组。 起始指数:是数值内的起始位置。
返回值:这个方法返回一个 16 位有符号整数，由 startIndex 开始的两个字节组成。
异常:
参数异常:如果开始索引等于值的长度减 1。 ArgumentNullException:如果值为空。 ArgumentOutOfRangeException:如果 startIndex 小于零或者大于值的长度减 1。
以下程序说明了位转换器的使用。ToInt16(字节[]，Int32) 方法:
例 1:
C
// C# program to demonstrate
// BitConverter.ToInt16(Byte[], Int32);
// Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// Define an array of byte values.
byte[] bytes = {32, 0, 0, 42, 0, 65, 0, 125, 0,
197, 0, 168, 3, 41, 4, 125, 32};
// Display the values of the myArr.
Console.Write("Initial Array: ");
// calling the PrintIndexAndValues()
// method to print
PrintIndexAndValues(bytes);
// print char value
Console.WriteLine("index byte Array short value");
for (int index = 0; index < bytes.Length - 1;
index = index + 2) {
short values = BitConverter.ToInt16(bytes, index);
Console.WriteLine(" {0} {1} {2}",
index, BitConverter.ToString(bytes, index, 2), values);
}
}
catch (ArgumentNullException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (ArgumentOutOfRangeException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (ArgumentException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining the method
// PrintIndexAndValues
public static void PrintIndexAndValues(byte[] myArr)
{
for (int i = 0; i < myArr.Length; i++) {
Console.Write("{0} ", myArr[i]);
}
Console.WriteLine();
Console.WriteLine();
}
}
输出:
Initial Array: 32 0 0 42 0 65 0 125 0 197 0 168 3 41 4 125 32
index byte Array short value
0 20-00 32
2 00-2A 10752
4 00-41 16640
6 00-7D 32000
8 00-C5 -15104
10 00-A8 -22528
12 03-29 10499
14 04-7D 32004
示例 2: 适用于参数异常
C
// C# program to demonstrate
// BitConverter.ToInt16(Byte[], Int32);
// Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// Define an array of byte values.
byte[] bytes = {32, 0, 0, 42, 0, 65, 0, 125, 0,
197, 0, 168, 3, 41, 4, 125};
// Display the values of the myArr.
Console.Write("Initial Array: ");
// calling the PrintIndexAndValues()
// method to print
PrintIndexAndValues(bytes);
// print char value
Console.WriteLine("index element short value");
for (int index = 1; index < bytes.Length;
index = index + 2) {
if (index == bytes.Length - 1) {
Console.WriteLine();
Console.WriteLine("startIndex equals the"+
" length of value minus 1.");
short values = BitConverter.ToInt16(bytes, index);
Console.WriteLine(" {0} {1} {2}",
index, BitConverter.ToString(bytes, index, 2), values);
}
else {
short values = BitConverter.ToInt16(bytes, index);
Console.WriteLine(" {0} {1} {2}",
index, BitConverter.ToString(bytes, index, 2),
values);
}
}
}
catch (ArgumentNullException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (ArgumentOutOfRangeException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (ArgumentException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining the method
// PrintIndexAndValues
public static void PrintIndexAndValues(byte[] myArr)
{
for (int i = 0; i < myArr.Length; i++) {
Console.Write("{0} ", myArr[i]);
}
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("initial Array in string: {0} ",
BitConverter.ToString(myArr));
Console.WriteLine();
}
}
输出:
Initial Array: 32 0 0 42 0 65 0 125 0 197 0 168 3 41 4 125
initial Array in string: 20-00-00-2A-00-41-00-7D-00-C5-00-A8-03-29-04-7D
index element short value
1 00-00 0
3 2A-00 42
5 41-00 65
7 7D-00 125
9 C5-00 197
11 A8-03 936
13 29-04 1065
startIndex equals the length of value minus 1.
Exception Thrown: System.ArgumentException
例 3: 为argumentout of range exception
C
// C# program to demonstrate
// BitConverter.ToInt16(Byte[], Int32);
// Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// Define an array of byte values.
byte[] bytes = {32, 0, 0, 42, 0, 65, 0, 125, 0,
197, 0, 168, 3, 41, 4, 125};
// Display the values of the myArr.
Console.Write("Initial Array: ");
// calling the PrintIndexAndValues()
// method to print
PrintIndexAndValues(bytes);
// print char value
Console.WriteLine("index element short value");
for (int index = 0; index < bytes.Length + 1;
index = index + 2) {
if (index == bytes.Length) {
Console.WriteLine();
Console.WriteLine("startIndex is greater than "+
"the length of value minus 1.");
short values = BitConverter.ToInt16(bytes, index);
}
else {
short values = BitConverter.ToInt16(bytes, index);
Console.WriteLine(" {0} {1} {2}",
index, BitConverter.ToString(bytes, index, 2), values);
}
}
}
catch (ArgumentNullException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (ArgumentOutOfRangeException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (ArgumentException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining the method
// PrintIndexAndValues
public static void PrintIndexAndValues(byte[] myArr)
{
for (int i = 0; i < myArr.Length; i++) {
Console.Write("{0} ", myArr[i]);
}
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("initial Array in string: {0} ",
BitConverter.ToString(myArr));
Console.WriteLine();
}
}
输出:
Initial Array: 32 0 0 42 0 65 0 125 0 197 0 168 3 41 4 125
initial Array in string: 20-00-00-2A-00-41-00-7D-00-C5-00-A8-03-29-04-7D
index element short value
0 20-00 32
2 00-2A 10752
4 00-41 16640
6 00-7D 32000
8 00-C5 -15104
10 00-A8 -22528
12 03-29 10499
14 04-7D 32004
startIndex is greater than the length of value minus 1.
Exception Thrown: System.ArgumentOutOfRangeException
示例 4: 适用于参数异常
C
// C# program to demonstrate
// BitConverter.ToInt16(Byte[], Int32);
// Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// Define an array of byte values.
byte[] bytes = null;
// get the char value
short values = BitConverter.ToInt16(bytes, 0);
Console.Write("{0}", values);
}
catch (ArgumentNullException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (ArgumentOutOfRangeException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (ArgumentException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
输出:
Exception Thrown: System.ArgumentNullException
参考:
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