How to concatenate the "string" and "int" into int type vari

Question

concatenate the "string" and "int" into int type variable e.g int a=10; string b="abc" a = a+ b; is it possible??? how???

Vulpes · Answer

It's not working on my machine: Unhandled Exception: System.FormatException: Input string was not in a correct f ormat. at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffe r& number, NumberFormatInfo info, Boolean parseDecimal) at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo in fo) However, if you specify that the string represents a hexadecimal number, then it will work as the code is equivalent to what I posted in the first place: int a = 10; object b = "abc"; a= a + Convert.ToInt32(b.ToString(), 16); // a is 2758

arslan elahi · Answer

i've done with object int a=10; object b="abc"; a=a+ Convert.ToInt32(b.toString()); it is working

Vulpes · Answer

The equivalent code in VB.NET: Dim a As Integer = 10 Dim b As String = "abc" a = a + b compiles OK with Option Strict Off but produces a run time exception because "abc" can't be parsed to a double.

arslan elahi · Answer

it is working in VB i want to convert it in C#

Vulpes · Answer

It's not possible as it stands because a + b yields the string "10abc" which isn't an int and can't even be parsed to an int. However, the following does work: int a = 10; string b = "abc"; a = a + Convert.ToInt32(b, 16); The result is 2758. The reason this works is because "abc" can be parsed to an hexadecimal integer which is equivalent to 2748 decimal. So adding 10 gives a result of 2758.

How to concatenate the "string" and "int" into int type vari

Answers (5)