C# – Type Conversion
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 − Live Demo
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 − Live Demo
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
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