作者：910621rh_270 | 来源：互联网 | 2023-10-12 18:34
C# | BitConverter。ToInt32()方法
原文:https://www . geesforgeks . org/c-sharp-bit converter-to int32-method/
BitConverter。ToInt32(Byte[]，Int32)方法用于返回从字节数组中指定位置的四个字节转换而来的 32 位有符号整数。
语法:
public static int ToInt32 (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 32 位有符号整数，由 startIndex 开始的两个字节组成。
T3】例外:T5】
- 参数异常:如果 startIndex 大于或等于值的长度减 3，并且小于或等于值的长度减 1。
- ArgumentNullException: 如果值为空。
- argumentoutofrangerexception:如果 startIndex 小于零或大于值的长度减 1。
以下程序说明了位转换器的使用。【方法:
例 1:****
c sharp . c sharp . c sharp . c sharp
// C# program to demonstrate
// BitConverter.ToInt32(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 int value");
for (int index = 0; index < bytes.Length - 3;
index = index + 4) {
int values = BitConverter.ToInt16(bytes, index);
Console.WriteLine(" {0} {1} {2}",
index, BitConverter.ToString(bytes, index,
4), 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 int value
0 20-00-00-2A 32
4 00-41-00-7D 16640
8 00-C5-00-A8 -15104
12 03-29-04-7D 10499
例 2: 为议论文异常为
c sharp . c sharp . c sharp . c sharp
// C# program to demonstrate
// BitConverter.ToInt32(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 int value");
for (int index = 1; index < bytes.Length - 2;
index = index + 4) {
if (index == bytes.Length - 3) {
Console.WriteLine();
Console.WriteLine("startIndex equals the "+
"length of value minus 3.");
int values = BitConverter.ToInt32(bytes, index);
Console.WriteLine(" {0} {1} {2}",
index, BitConverter.ToString(bytes, index, 4), values);
}
else {
int values = BitConverter.ToInt32(bytes, index);
Console.WriteLine(" {0} {1} {2}",
index, BitConverter.ToString(bytes, index, 4), 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 int value
1 00-00-2A-00 2752512
5 41-00-7D-00 8192065
9 C5-00-A8-03 61341893
startIndex equals the length of value minus 3.
Exception Thrown: System.ArgumentException
例 3: 为argumentout of rangeexception为
c sharp . c sharp . c sharp . c sharp
// C# program to demonstrate
// BitConverter.ToInt32(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 int value");
for (int index = 0; index < bytes.Length + 1;
index = index + 4) {
if (index == bytes.Length) {
Console.WriteLine();
Console.WriteLine("startIndex is greater than "+
"the length of value minus 1");
int values = BitConverter.ToInt32(bytes, index);
Console.WriteLine(" {0} {1} {2}",
index, BitConverter.ToString(bytes, index, 4), values);
}
else {
int values = BitConverter.ToInt32(bytes, index);
Console.WriteLine(" {0} {1} {2}",
index, BitConverter.ToString(bytes, index, 4), 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 int value
0 20-00-00-2A 704643104
4 00-41-00-7D 2097168640
8 00-C5-00-A8 -1476344576
12 03-29-04-7D 2097424643
startIndex is greater than the length of value minus 1
Exception Thrown: System.ArgumentOutOfRangeException
例 4: 为 ArgumentNullException 为
c sharp . c sharp . c sharp . c sharp
// C# program to demonstrate
// BitConverter.ToInt32(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 int value
int values = BitConverter.ToInt32(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:
- https://docs . Microsoft . com/en-us/dotnet/API/system . bit converter . toint 32？视图=netframework-4.7.2
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