此方法用于返回从字节数组中指定位置的字节转换而来的布尔值。
句法：
public static bool ToBoolean (byte[] value, int startIndex);参数：
value: It is the required byte array.
startIndex: It is the index of the byte within value.
返回值：如果value中startIndex处的字节为非零，则此方法返回true，否则将返回false。
例外情况：
- ArgumentNullException：如果该值为null。
- ArgumentOutOfRangeException：如果startIndex小于零或大于值的长度减去1。
下面的程序说明了BitConverter.ToBoolean(Byte []，Int32)方法的用法：
范例1：
// C# program to demonstrate
// BitConverter.ToBoolean(bytes, index));
// Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// Define an array of byte values.
byte[] bytes = { 0, 1, 2, 4, 8, 16, 32, 64 };
// Display the values of the myArr.
Console.Write("Initial Array: ");
// calling the PrintIndexAndValues()
// method to print
PrintIndexAndValues(bytes);
for (int index = 0; index < bytes.Length; index++) {
bool values = BitConverter.ToBoolean(bytes, index);
Console.WriteLine("index element bool");
Console.WriteLine(" {0} {1} {2}",
index, bytes[index], 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);
}
}
// 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: 0 1 2 4 8 16 32 64
index element bool
0 0 False
index element bool
1 1 True
index element bool
2 2 True
index element bool
3 4 True
index element bool
4 8 True
index element bool
5 16 True
index element bool
6 32 True
index element bool
7 64 True
示例2：对于ArgumentOutOfRangeException
// C# program to demonstrate
// BitConverter.ToBoolean(bytes, index));
// Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// Define an array of byte values.
byte[] bytes = { 0, 1, 2, 4, 8, 16, 32, 64 };
// Display the values of the myArr.
Console.Write("Initial Array: ");
// calling the PrintIndexAndValues()
// method to print
PrintIndexAndValues(bytes);
Console.WriteLine("startindex in less than zero");
bool values = BitConverter.ToBoolean(bytes, -1);
}
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);
}
}
// 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: 0 1 2 4 8 16 32 64
startindex in less than zero
Exception Thrown: System.ArgumentOutOfRangeException
示例3：对于ArgumentNullException
// C# program to demonstrate
// BitConverter.ToBoolean(bytes, index));
// Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// Define an array of byte values.
byte[] bytes = null;
// Getting bool value
Console.WriteLine("byte array is null");
bool values = BitConverter.ToBoolean(bytes, 0);
}
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);
}
}
}
输出：
byte array is null
Exception Thrown: System.ArgumentNullException
参考：
- https://docs.microsoft.com/zh-cn/dotnet/api/system.bitconverter.toboolean?view=netframework-4.7.2