From int to double

Question

Hi, here is the problem of convert.ToInt32 (textbox1.text), this is an integer format, and if I want to type 3.5 for example an error, how to do it?

Answer 1

`double` type also has `TryParse` method you can use to safely convert a given string to `double`

double num;
bool res = double.TryParse("123.45", out num);

When <res> equals to true it means the string can be and had been converted to double, the conversion result is saved into variable <num>.

Answer 2

Jayakrishna For example, I have textbox1 with an introduction to it of 1.75 and textbox2 with a number of 1.75, I want label1 to output their sum.

Answer 3

Clearly you could use Exeption Handling, more you find here:
https://www.sololearn.com/learn/CSharp/2690/

Answer 4

What difficulty you are facing in sum,?
As Ipang suggested, use TryParse, take 2 numbers like one for textbox1, and another for box2.
double num_1, num_2;
Assign values..
And display in label1=> as num_1+num_2;

Answer 5

int j=3;
double i=j;
Simply it possible, it is implicit convertion; since it lower type to double. No loss of data.
But in higher to lower type convertion, there is need of type convertion.. Like,
double i=3.5;
int k=(int)i; // k=3