Csharp/C Sharp by API/System/Convert
Содержание
Convert.ChangeType
<source lang="csharp"> using System; public class MainClass {
public static void Main() { Type targetType = typeof(int); object source = "42"; object result = Convert.ChangeType(source, targetType); Console.WriteLine(result); // 42 Console.WriteLine(result.GetType()); // System.Int32 }
}
</source>
Convert.FromBase64CharArray
<source lang="csharp"> using System; using System.Data; using System.Text.RegularExpressions; using System.Text; class Class1{
static void Main(string[] args){ foreach (byte b in Base64DecodeString("AAAA")) Console.WriteLine(b); } public static byte[] Base64DecodeString(string inputStr) { byte[] encodedByteArray = Convert.FromBase64CharArray(inputStr.ToCharArray(), 0, inputStr.Length); return (encodedByteArray); }
}
</source>
Convert.FromBase64String
<source lang="csharp"> using System; using System.IO; using System.Text; class MainClass {
public static void Main() { byte[] b = Encoding.Unicode.GetBytes("string"); // Return the Base64-encoded string. string str = Convert.ToBase64String(b); Console.WriteLine(str); Convert.FromBase64String(str); // Return the decoded Unicode string. Console.WriteLine(Encoding.Unicode.GetString(b));
}
}
</source>
Convert.ToBase64CharArray
<source lang="csharp"> using System; using System.Data; using System.Text.RegularExpressions; using System.Text; class Class1{
static void Main(string[] args){ Console.WriteLine(Base64EncodeBytes(new byte[5] {45,34,23,54,38})); } public static string Base64EncodeBytes(byte[] inputBytes) { // Each 3 byte sequence in inputBytes must be converted to a 4 byte sequence long arrLength = (long)(4.0d * inputBytes.Length / 3.0d); if ((arrLength % 4) != 0) { // increment the array lenght to the next multiple of 4 if it is not already divisible by 4 arrLength += 4 - (arrLength % 4); } char[] encodedCharArray = new char[arrLength]; Convert.ToBase64CharArray(inputBytes, 0, inputBytes.Length, encodedCharArray, 0); return (new string(encodedCharArray)); }
}
</source>
Convert.ToBase64String
<source lang="csharp"> using System; using System.IO; using System.Text; class MainClass {
public static void Main() { byte[] b = Encoding.Unicode.GetBytes("string"); // Return the Base64-encoded string. string str = Convert.ToBase64String(b); Console.WriteLine(str); Convert.FromBase64String(str); // Return the decoded Unicode string. Console.WriteLine(Encoding.Unicode.GetString(b));
}
}
</source>
Convert.ToInt32
<source lang="csharp">
using System; using System.Data;
class Class1{
static void Main(string[] args){ string base2 = "111"; string base8 = "117"; string base10 = "1110"; string base16 = "11F1FF"; Console.WriteLine("Convert.ToInt32(base2, 2) = " + Convert.ToInt32(base2, 2)); Console.WriteLine("Convert.ToInt32(base8, 8) = " + Convert.ToInt32(base8, 8)); Console.WriteLine("Convert.ToInt32(base10, 10) = " + Convert.ToInt32(base10, 10)); Console.WriteLine("Convert.ToInt32(base16, 16) = " + Convert.ToInt32(base16, 16)); }
}
</source>
Convert.ToUInt32
<source lang="csharp"> using System; public class MainClass {
public static void Main() { int thirty = Convert.ToInt32("1E", 16); // parse in hexadecimal uint five = Convert.ToUInt32("101", 2); // parse in binary }
}
</source>