Getting error "Input string was not in a correct format"

Question

1.00/5 (2 votes)

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From the following code,

C#

string strid  = txtId.Text;
int id = Convert.ToInt32(strid);

I was getting a message like this
"Input string was not in a correct format"
what should I do?

Posted 9-Jul-15 2:27am

Mani Kandan

Updated 9-Jul-15 2:42am

Akhil Mittal

v2

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Comments

[no name] 9-Jul-15 8:36am

Supply a string in the correct format, of course.

CB Sharma 9-Jul-15 8:37am

strid valus is not integer type that's why you got error message "Input string was not in a correct format"

Check strid value in debug mode. You find answer of this error.

3 solutions

Solution 1

Whatever is in txtId.Text can't be interpreted as an int. You can't control what is in a textbox so use int.TryParse instead so that you can handle when the input is not an int.

Posted 9-Jul-15 2:39am

F-ES Sitecore

Solution 2

Hi,

Check if txtId.Text has value. If txtId.Text is ""(empty), then how it convert to integer?

so, your code should be as follow:

C#

string strid = txtId.Text;

if(strid != "")
{
    int id = Convert.ToInt32(strid);
}

Posted 9-Jul-15 2:42am

JR009

Comments

Akhil Mittal 9-Jul-15 8:49am

This can not be the solution, It is not necessary that because of empty value of string this error is coming.This error is coming because Convert.Itn32 is getting string that can not be converted to integer, something that is not numeric in nature.It has to be resolved by Int32.TryParse.

[no name] 9-Jul-15 9:08am

Actually he is right, sort of. The implementation is not what I would choose but an empty string will throw that exception.

Mani Kandan 9-Jul-15 11:49am

Actually, there is a value inside the cells

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Akhil Mittal · Accepted Answer · 2015-07-09T02:45:00

Solution 3

Try this,

C#

string strid  = txtId.Text;
int id=0;
Int32.TryParse(strid, out id);

Using above code, you'll not get the error, and you'll get the converted value in id variable.If strid is not in well formed input, you'll get 0 in id as a value.:-)

Posted 9-Jul-15 2:45am

Akhil Mittal

Comments

Mani Kandan 9-Jul-15 8:51am

tanq

Akhil Mittal 9-Jul-15 8:53am

Mark it as an answer if it works :-)

Krunal Rohit 9-Jul-15 9:00am

Answer should be accepted.

-KR