Type conversion is converting one type of data to another type. It is also known as Type Casting. In C#, type casting has two forms −
-
Implicit type conversion − These conversions are performed by C# in a type-safe manner. For example, are conversions from smaller to larger integral types and conversions from derived classes to base classes.
-
Explicit type conversion − These conversions are done explicitly by users using the pre-defined functions. Explicit conversions require a cast operator.
The following example shows an explicit type conversion −
using System;
namespace TypeConversionApplication {
class ExplicitConversion {
static void Main(string[] args) {
double d = 5673.74;
int i;
// cast double to int.
i = (int)d;
Console.WriteLine(i);
Console.ReadKey();
}
}
}
When the above code is compiled and executed, it produces the following result −
5673
C# Type Conversion Methods
C# provides the following built-in type conversion methods −
| Sr.No. | Methods & Description |
|---|---|
| 1 |
ToBoolean Converts a type to a Boolean value, where possible. |
| 2 |
ToByte Converts a type to a byte. |
| 3 |
ToChar Converts a type to a single Unicode character, where possible. |
| 4 |
ToDateTime Converts a type (integer or string type) to date-time structures. |
| 5 |
ToDecimal Converts a floating point or integer type to a decimal type. |
| 6 |
ToDouble Converts a type to a double type. |
| 7 |
ToInt16 Converts a type to a 16-bit integer. |
| 8 |
ToInt32 Converts a type to a 32-bit integer. |
| 9 |
ToInt64 Converts a type to a 64-bit integer. |
| 10 |
ToSbyte Converts a type to a signed byte type. |
| 11 |
ToSingle Converts a type to a small floating point number. |
| 12 |
ToString Converts a type to a string. |
| 13 |
ToType Converts a type to a specified type. |
| 14 |
ToUInt16 Converts a type to an unsigned int type. |
| 15 |
ToUInt32 Converts a type to an unsigned long type. |
| 16 |
ToUInt64 Converts a type to an unsigned big integer. |
The following example converts various value types to string type −
using System;
namespace TypeConversionApplication {
class StringConversion {
static void Main(string[] args) {
int i = 75;
float f = 53.005f;
double d = 2345.7652;
bool b = true;
Console.WriteLine(i.ToString());
Console.WriteLine(f.ToString());
Console.WriteLine(d.ToString());
Console.WriteLine(b.ToString());
Console.ReadKey();
}
}
}
When the above code is compiled and executed, it produces the following result −
75 53.005 2345.7652 True