BitConverter.ToInt32 メソッド
アセンブリ: mscorlib (mscorlib.dll 内)

Dim value As Byte() Dim startIndex As Integer Dim returnValue As Integer returnValue = BitConverter.ToInt32(value, startIndex)
戻り値
startIndex から始まる 4 バイトで構成される 32 ビット符号付き整数。


ToInt32 メソッドを使用して、Byte 配列の要素を Int32 値に変換するコード例を次に示します。
' Example of the BitConverter.ToInt32 method. Imports System Imports Microsoft.VisualBasic Module BytesToInt32Demo Const formatter As String = "{0,5}{1,17}{2,15}" ' Convert four Byte array elements to an Integer and display it. Sub BAToInt32( bytes( ) As Byte, index As Integer ) Dim value As Integer = BitConverter.ToInt32( bytes, index ) Console.WriteLine( formatter, index, _ BitConverter.ToString( bytes, index, 4 ), value ) End Sub ' Display a Byte array, using multiple lines if necessary. Sub WriteMultiLineByteArray( bytes( ) As Byte ) Const rowSize As Integer = 20 Dim iter As Integer Console.WriteLine( "initial Byte array" ) Console.WriteLine( "------------------" ) For iter = 0 To bytes.Length - rowSize - 1 Step rowSize Console.Write( _ BitConverter.ToString( bytes, iter, rowSize ) ) Console.WriteLine( "-" ) Next iter Console.WriteLine( BitConverter.ToString( bytes, iter ) ) Console.WriteLine( ) End Sub Sub Main( ) Dim byteArray as Byte( ) = { _ 15, 0, 0, 0, 0, 128, 0, 0, 16, 0, _ 0, 240, 255, 0, 202, 154, 59, 0, 54, 101, _ 196, 241, 255, 255, 255, 127 } Console.WriteLine( _ "This example of the BitConverter.ToInt32( Byte( ), " & _ "Integer ) " & vbCrLf & "method generates the " & _ "following output. It converts elements " & vbCrLf & _ "of a Byte array to Integer values." & vbCrLf ) WriteMultiLineByteArray( byteArray ) Console.WriteLine( formatter, "index", "array elements", _ "Integer" ) Console.WriteLine( formatter, "-----", "--------------", _ "-------" ) ' Convert Byte array elements to Integer values. BAToInt32( byteArray, 1 ) BAToInt32( byteArray, 0 ) BAToInt32( byteArray, 21 ) BAToInt32( byteArray, 6 ) BAToInt32( byteArray, 9 ) BAToInt32( byteArray, 13 ) BAToInt32( byteArray, 17 ) BAToInt32( byteArray, 22 ) BAToInt32( byteArray, 2 ) End Sub End Module ' This example of the BitConverter.ToInt32( Byte( ), Integer ) ' method generates the following output. It converts elements ' of a Byte array to Integer values. ' ' initial Byte array ' ------------------ ' 0F-00-00-00-00-80-00-00-10-00-00-F0-FF-00-CA-9A-3B-00-36-65- ' C4-F1-FF-FF-FF-7F ' ' index array elements Integer ' ----- -------------- ------- ' 1 00-00-00-00 0 ' 0 0F-00-00-00 15 ' 21 F1-FF-FF-FF -15 ' 6 00-00-10-00 1048576 ' 9 00-00-F0-FF -1048576 ' 13 00-CA-9A-3B 1000000000 ' 17 00-36-65-C4 -1000000000 ' 22 FF-FF-FF-7F 2147483647 ' 2 00-00-00-80 -2147483648
// Example of the BitConverter.ToInt32 method. using System; class BytesToInt32Demo { const string formatter = "{0,5}{1 ,17}{2,15}"; // Convert four byte array elements to an int and display it. public static void BAToInt32( byte[ ] bytes, int index ) { int value = BitConverter.ToInt32( bytes, index ); Console.WriteLine( formatter, index, BitConverter.ToString( bytes, index, 4 ), value ); } // Display a byte array, using multiple lines if necessary. public static void WriteMultiLineByteArray( byte[ ] bytes ) { const int rowSize = 20; int iter; Console.WriteLine( "initial byte array" ); Console.WriteLine( "------------------" ); for( iter = 0; iter < bytes.Length - rowSize; iter += rowSize ) { Console.Write( BitConverter.ToString( bytes, iter, rowSize ) ); Console.WriteLine( "-" ); } Console.WriteLine( BitConverter.ToString( bytes, iter ) ); Console.WriteLine( ); } public static void Main( ) { byte[ ] byteArray = { 15, 0, 0, 0, 0, 128, 0, 0, 16, 0, 0, 240, 255, 0, 202, 154, 59, 0, 54, 101, 196, 241, 255, 255, 255, 127 }; Console.WriteLine( "This example of the BitConverter.ToInt32( byte[ ], " + "int ) \nmethod generates the following output. It " + "converts elements \nof a byte array to int values.\n" ); WriteMultiLineByteArray( byteArray ); Console.WriteLine( formatter, "index", "array elements", "int" ); Console.WriteLine( formatter, "-----", "--------------", "---" ); // Convert byte array elements to int values. BAToInt32( byteArray, 1 ); BAToInt32( byteArray, 0 ); BAToInt32( byteArray, 21 ); BAToInt32( byteArray, 6 ); BAToInt32( byteArray, 9 ); BAToInt32( byteArray, 13 ); BAToInt32( byteArray, 17 ); BAToInt32( byteArray, 22 ); BAToInt32( byteArray, 2 ); } } /* This example of the BitConverter.ToInt32( byte[ ], int ) method generates the following output. It converts elements of a byte array to int values. initial byte array ------------------ 0F-00-00-00-00-80-00-00-10-00-00-F0-FF-00-CA-9A-3B-00-36-65- C4-F1-FF-FF-FF-7F index array elements int ----- -------------- --- 1 00-00-00-00 0 0 0F-00-00-00 15 21 F1-FF-FF-FF -15 6 00-00-10-00 1048576 9 00-00-F0-FF -1048576 13 00-CA-9A-3B 1000000000 17 00-36-65-C4 -1000000000 22 FF-FF-FF-7F 2147483647 2 00-00-00-80 -2147483648 */
// Example of the BitConverter::ToInt32 method. using namespace System; // Convert four byte array elements to an int and display it. void BAToInt32( array<unsigned char>^bytes, int index ) { int value = BitConverter::ToInt32( bytes, index ); Console::WriteLine( "{0,5}{1,17}{2,15}", index, BitConverter::ToString( bytes, index, 4 ), value ); } // Display a byte array, using multiple lines if necessary. void WriteMultiLineByteArray( array<unsigned char>^bytes ) { const int rowSize = 20; int iter; Console::WriteLine( "initial unsigned char array" ); Console::WriteLine( "---------------------------" ); for ( iter = 0; iter < bytes->Length - rowSize; iter += rowSize ) { Console::Write( BitConverter::ToString( bytes, iter, rowSize ) ); Console::WriteLine( "-" ); } Console::WriteLine( BitConverter::ToString( bytes, iter ) ); Console::WriteLine(); } int main() { array<unsigned char>^byteArray = {15,0,0,0,0,128,0,0 ,16,0,0,240,255,0,202,154,59,0,54,101,196,241,255,255,255,127}; Console::WriteLine( "This example of the BitConverter::ToInt32( unsigned " "char[ ], int ) \nmethod generates the following output. It " "converts elements of a \nbyte array to int values.\n" ); WriteMultiLineByteArray( byteArray ); Console::WriteLine( "{0,5}{1,17}{2,15}", "index", "array elements", "int" ); Console::WriteLine( "{0,5}{1,17}{2,15}", "-----", "--------------", "---" ); // Convert byte array elements to int values. BAToInt32( byteArray, 1 ); BAToInt32( byteArray, 0 ); BAToInt32( byteArray, 21 ); BAToInt32( byteArray, 6 ); BAToInt32( byteArray, 9 ); BAToInt32( byteArray, 13 ); BAToInt32( byteArray, 17 ); BAToInt32( byteArray, 22 ); BAToInt32( byteArray, 2 ); } /* This example of the BitConverter::ToInt32( unsigned char[ ], int ) method generates the following output. It converts elements of a byte array to int values. initial unsigned char array --------------------------- 0F-00-00-00-00-80-00-00-10-00-00-F0-FF-00-CA-9A-3B-00-36-65- C4-F1-FF-FF-FF-7F index array elements int ----- -------------- --- 1 00-00-00-00 0 0 0F-00-00-00 15 21 F1-FF-FF-FF -15 6 00-00-10-00 1048576 9 00-00-F0-FF -1048576 13 00-CA-9A-3B 1000000000 17 00-36-65-C4 -1000000000 22 FF-FF-FF-7F 2147483647 2 00-00-00-80 -2147483648 */
// Example of the BitConverter.ToInt32 method. import System.*; class BytesToInt32Demo { private static String formatter = "{0 ,5}{1,17}{2,15}"; // Convert four byte array elements to an int and display it. public static void BAToInt32(ubyte bytes[], int index) { int value = BitConverter.ToInt32(bytes, index); Console.WriteLine(formatter, (Int32)index, BitConverter.ToString(bytes, index, 4), (Int32)value); } //BAToInt32 // Display a byte array, using multiple lines if necessary. public static void WriteMultiLineByteArray(ubyte bytes[]) { final int rowSize = 20; int iter; Console.WriteLine("initial byte array"); Console.WriteLine("------------------"); for (iter = 0; iter < bytes.length - rowSize; iter += rowSize) { Console.Write(BitConverter.ToString(bytes, iter, rowSize)); Console.WriteLine("-"); } Console.WriteLine(BitConverter.ToString(bytes, iter)); Console.WriteLine(); } //WriteMultiLineByteArray public static void main(String[] args) { ubyte byteArray[] = { 15, 0, 0, 0, 0, 128, 0, 0, 16, 0, 0, 240, 255, 0, 202, 154, 59, 0, 54, 101, 196, 241, 255, 255, 255, 127 }; Console.WriteLine(("This example of the " + "BitConverter.ToInt32( byte[ ], int ) \n" + "method generates the following output. " + "It converts elements \nof a byte array to int values.\n")); WriteMultiLineByteArray(byteArray); Console.WriteLine(formatter, "index", "array elements", "int"); Console.WriteLine(formatter, "-----", "--------------", "---"); // Convert byte array elements to int values. BAToInt32(byteArray, 1); BAToInt32(byteArray, 0); BAToInt32(byteArray, 21); BAToInt32(byteArray, 6); BAToInt32(byteArray, 9); BAToInt32(byteArray, 13); BAToInt32(byteArray, 17); BAToInt32(byteArray, 22); BAToInt32(byteArray, 2); } //main } //BytesToInt32Demo /* This example of the BitConverter.ToInt32( byte[ ], int ) method generates the following output. It converts elements of a byte array to int values. initial byte array ------------------ 0F-00-00-00-00-80-00-00-10-00-00-F0-FF-00-CA-9A-3B-00-36-65- C4-F1-FF-FF-FF-7F index array elements int ----- -------------- --- 1 00-00-00-00 0 0 0F-00-00-00 15 21 F1-FF-FF-FF -15 6 00-00-10-00 1048576 9 00-00-F0-FF -1048576 13 00-CA-9A-3B 1000000000 17 00-36-65-C4 -1000000000 22 FF-FF-FF-7F 2147483647 2 00-00-00-80 -2147483648 */

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