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C# |缓冲区。块复制(数组，Int32，数组，Int32，Int32)方法
C# |缓冲区。块复制(数组，Int32，数组，Int32，Int32)方法
原文:https://www . geesforgeks . org/c-sharp-buffer-block copyright-int 32-array-int 32-int 32-method/
此方法用于将指定数量的字节从从特定偏移量开始的源数组复制到从特定偏移量开始的目标数组。 语法:
public static void BlockCopy (Array src, int srcOffset, Array dst, int dstOffset, int count);
参数:
src: 是源缓冲区。 srcOffset: 是进入 src 的从零开始的字节偏移量。 dst: 是目的缓冲区。 dstOffset: 从零开始的字节偏移量变为 dst 。 计数:要复制的字节数。
例外:
- ArgumentNullException: 如果 src 或 dst 为空。
- 参数异常:如果 src 或 dst 不是基元数组 或 ，则 src 中的字节数小于 srcOffset 加上计数。 或dst中的字节数小于 dstOffset 加上 count 。
- ArgumentOutOfRangeException:如果 srcOffset 、 dstOffset 或 count 小于 0。
以下程序说明了缓冲区的使用。BlockCopy(Array，Int32，Array，Int32，Int32) 方法: 例 1:
c sharp . c sharp . c sharp . c sharp
// C# program to demonstrate
// Buffer.BlockCopy(Array, Int32,
// Array, Int32, Int32) Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// Declaring src and dest array
long[] src = {15, 16, 17, 18 };
long[] dest = {17, 18, 19, 20 };
Console.WriteLine("Initial Array values:");
Console.WriteLine();
// Display hexadecimal values
Console.WriteLine("Array element in hexadecimal form:");
displayhexvalue(src, "src");
displayhexvalue(dest, "dest");
// display Individual byte
Console.WriteLine("Individual bytes:");
displaybytes(src, "src");
displaybytes(dest, "dest");
// copying the specified number of bytes
// using Buffer.BlockCopy() method
Buffer.BlockCopy(src, 4, dest, 7, 6);
Console.WriteLine();
Console.WriteLine("Array after operation:");
Console.WriteLine();
// display hexadecimal values
Console.WriteLine("Array element in hexadecimal form:");
displayhexvalue(src, "src");
displayhexvalue(dest, "dest");
// display hexadecimal value
Console.WriteLine("Individual bytes:");
displaybytes(src, "src");
displaybytes(dest, "dest");
}
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);
}
}
// Display the individual
// array element values
// in hexadecimal.
public static void displayhexvalue(Array a,
string name)
{
// print the name
Console.Write("{0, 5}:", name);
// Display value one by one
for (int i = 0; i < a.Length; i++)
Console.Write(" {0:X16} ", a.GetValue(i));
Console.WriteLine();
}
// Display the individual
// bytes in the array
// in hexadecimal.
public static void displaybytes(Array arr,
string name)
{
// print the name
Console.Write("{0, 5}:", name);
// loop to traverse
// every element of the array
for (int i = 0; i < arr.Length; i++) {
// getting byte array
// converted from long array
byte[] bytes = BitConverter.GetBytes((long)arr.GetValue(i));
// display each byte value
foreach(byte byteValue in bytes)
Console.Write(" {0:X2}", byteValue);
}
Console.WriteLine();
}
}
输出:
初始数组值: 十六进制形式的数组元素: src:0000000000000000000000000000000000000000011 00000000000000000012 dest:000000000000000000000000000000000000000012 000000000000000000000000000000000012 00 00 00 14 00 00 00 00 00 00 00 00 运算后的数组: 十六进制形式的数组元素: src:000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 00 00 10 00 00 00 00 13 00 00 00 00 00 00 00 00 14 00 00 00 00 00 00 00 00 00
例 2: 为 ArgumentNullException 为
c sharp . c sharp . c sharp . c sharp
// C# program to demonstrate
// Buffer.BlockCopy(Array, Int32,
// Array, Int32, Int32) Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// Declaring src and dest array
long[] src = {15, 16, 17, 18};
long[] dest = {17, 18, 19, 20};
Console.WriteLine("Initial Array values:");
Console.WriteLine();
// Display hexadecimal values
Console.WriteLine("Array element in hexadecimal form:");
displayhexvalue(src, "src");
displayhexvalue(dest, "dest");
// display Individual byte
Console.WriteLine("Individual bytes:");
displaybytes(src, "src");
displaybytes(dest, "dest");
// copying the specified number of bytes
// using Buffer.BlockCopy() method
Console.WriteLine("src and dst are null:");
Buffer.BlockCopy(null, 4, null, 7, 6);
Console.WriteLine();
Console.WriteLine("Array after operation:");
Console.WriteLine();
// display hexadecimal values
Console.WriteLine("Array element in hexadecimal form:");
displayhexvalue(src, "src");
displayhexvalue(dest, "dest");
// display hexadecimal value
Console.WriteLine("Individual bytes:");
displaybytes(src, "src");
displaybytes(dest, "dest");
}
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);
}
}
// Display the individual array
// element values in hexadecimal.
public static void displayhexvalue(Array a,
string name)
{
// print the name
Console.Write("{0, 5}:", name);
// Display value one by one
for (int i = 0; i < a.Length; i++)
Console.Write(" {0:X16} ", a.GetValue(i));
Console.WriteLine();
}
// Display the individual bytes
// in the array in hexadecimal.
public static void displaybytes(Array arr,
string name)
{
// print the name
Console.Write("{0, 5}:", name);
// loop to traverse every
// element of the array
for (int i = 0; i < arr.Length; i++) {
// getting byte array converted
// from long array
byte[] bytes = BitConverter.GetBytes((long)arr.GetValue(i));
// display each byte value
foreach(byte byteValue in bytes)
Console.Write(" {0:X2}", byteValue);
}
Console.WriteLine();
}
}
输出:
初始数组值: 十六进制形式的数组元素: src:0000000000000000000000000000000000000000011 00000000000000000012 dest:000000000000000000000000000000000000000012 000000000000000000000000000000000012 00 00 00 14 00 00 00 00 00 00 00 00 src 和 dst 为空: 抛出异常:系统。 ArgumentNullException
例 3: 为argumentout of rangeexception为
c sharp . c sharp . c sharp . c sharp
// C# program to demonstrate
// Buffer.BlockCopy(Array, Int32,
// Array, Int32, Int32) Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// Declaring src and dest array
long[] src = {15, 16, 17, 18};
long[] dest = {17, 18, 19, 20};
Console.WriteLine("Initial Array values:");
Console.WriteLine();
// Display hexadecimal values
Console.WriteLine("Array element in hexadecimal form:");
displayhexvalue(src, "src");
displayhexvalue(dest, "dest");
// display Individual byte
Console.WriteLine("Individual bytes:");
displaybytes(src, "src");
displaybytes(dest, "dest");
// copying the specified number of bytes
// using Buffer.BlockCopy() method
Console.WriteLine("srcoffest and destoffset are less than zero:");
Buffer.BlockCopy(src, -4, dest, -7, 6);
Console.WriteLine();
Console.WriteLine("Array after operation:");
Console.WriteLine();
// display hexadecimal values
Console.WriteLine("Array element in hexadecimal form:");
displayhexvalue(src, "src");
displayhexvalue(dest, "dest");
// display hexadecimal value
Console.WriteLine("Individual bytes:");
displaybytes(src, "src");
displaybytes(dest, "dest");
}
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);
}
}
// Display the individual array
// element values in hexadecimal.
public static void displayhexvalue(Array a,
string name)
{
// print the name
Console.Write("{0, 5}:", name);
// Display value one by one
for (int i = 0; i < a.Length; i++)
Console.Write(" {0:X16} ", a.GetValue(i));
Console.WriteLine();
}
// Display the individual bytes
// in the array in hexadecimal.
public static void displaybytes(Array arr,
string name)
{
// print the name
Console.Write("{0, 5}:", name);
// loop to traverse every
// element of the array
for (int i = 0; i < arr.Length; i++) {
// getting byte array converted
// from long array
byte[] bytes = BitConverter.GetBytes((long)arr.GetValue(i));
// display each byte value
foreach(byte byteValue in bytes)
Console.Write(" {0:X2}", byteValue);
}
Console.WriteLine();
}
}
输出:
初始数组值: 十六进制形式的数组元素: src:0000000000000000000000000000000000000000011 00000000000000000012 dest:000000000000000000000000000000000000000012 000000000000000000000000000000000012 00 00 00 14 00 00 00 00 00 00 00 srcoffest 和 destoffset 小于零: 异常抛出:系统。 argumentoutofrangerexception
例 4: 为议论文异常为
c sharp . c sharp . c sharp . c sharp
// C# program to demonstrate
// Buffer.BlockCopy(Array, Int32,
// Array, Int32, Int32)
// Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// Declaring src and dest array
long[] src = {15, 16, 17, 18};
long[] dest = {17, 18, 19, 20};
Console.WriteLine("Initial Array values:");
Console.WriteLine();
// Display hexadecimal values
Console.WriteLine("Array element in hexadecimal form:");
displayhexvalue(src, "src");
displayhexvalue(dest, "dest");
// display Individual byte
Console.WriteLine("Individual bytes:");
displaybytes(src, "src");
displaybytes(dest, "dest");
// copying the specified number of bytes
// using Buffer.BlockCopy() method
Console.WriteLine("srcoffest and destoffset are less than zero:");
Buffer.BlockCopy(src, 4, dest, 7, 70);
Console.WriteLine();
Console.WriteLine("Array after operation:");
Console.WriteLine();
// display hexadecimal values
Console.WriteLine("Array element in hexadecimal form:");
displayhexvalue(src, "src");
displayhexvalue(dest, "dest");
// display hexadecimal value
Console.WriteLine("Individual bytes:");
displaybytes(src, "src");
displaybytes(dest, "dest");
}
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);
}
}
// Display the individual array
// element values in hexadecimal.
public static void displayhexvalue(Array a,
string name)
{
// print the name
Console.Write("{0, 5}:", name);
// Display value one by one
for (int i = 0; i < a.Length; i++)
Console.Write(" {0:X16} ", a.GetValue(i));
Console.WriteLine();
}
// Display the individual bytes
// in the array in hexadecimal.
public static void displaybytes(Array arr,
string name)
{
// print the name
Console.Write("{0, 5}:", name);
// loop to traverse every
// element of the array
for (int i = 0; i < arr.Length; i++) {
// getting byte array
// converted from long array
byte[] bytes = BitConverter.GetBytes((long)arr.GetValue(i));
// display each byte value
foreach(byte byteValue in bytes)
Console.Write(" {0:X2}", byteValue);
}
Console.WriteLine();
}
}
输出:
初始数组值: 十六进制形式的数组元素: src:0000000000000000000000000000000000000000011 00000000000000000012 dest:000000000000000000000000000000000000000012 000000000000000000000000000000000012 00 00 00 14 00 00 00 00 00 00 00 srcoffest 和 destoffset 小于零: 异常抛出:系统。 ArgumentException
参考:
- https://docs . Microsoft . com/en-us/dotnet/API/system . buffer . block copy？视图=netframework-4.7.2
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