system.FormatExcerption..how to solve this?

Question

1.00/5 (1 vote)

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C#

if (string.IsNullOrEmpty(profileList[i].CurrencyID))
          { boatProfile.CurrencyID = 0; }
          else
 { boatProfile.CurrencyID=int.Parse((profileList[i].CurrencyID)); }

crrencyID is declared aspublic int? currencyID ..value in (profileList[i].CurrencyID="Dkk"
In the else part it is showing the error..""int.Parse((profileList[i].CurrencyID)) threw a sysytem.formatException""

Posted 9-Jan-14 17:34pm

ahmed ali mohd

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Ron Beyer 9-Jan-14 23:38pm

How do you expect "Dkk" to be turned into an integer?

ahmed ali mohd 9-Jan-14 23:42pm

im parsing it
is that wrong?

ahmed ali mohd 9-Jan-14 23:42pm

correct me if im wrong.

Ron Beyer 9-Jan-14 23:49pm

"dkk" cannot be converted to an integer, that's what the exception is telling you. There's no way that will ever be converted to an integer, parsing or not.

4 solutions

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Karthik_Mahalingam · Answer 1 · 2014-01-09T18:29:00

Solution 3

use TryParse[^]

C#

else
        {
            boatProfile.CurrencyID = 0;
            int.TryParse(profileList[i].CurrencyID, out boatProfile.CurrencyID);
        }

Posted 9-Jan-14 18:29pm

Karthik_Mahalingam

Comments

TrushnaK 10-Jan-14 0:40am

nice option....
my 5+

Karthik_Mahalingam 10-Jan-14 0:45am

Thanks Trushnak :)

ahmed ali mohd 10-Jan-14 0:42am

it is saying that TryParse has invalid arguments

Karthik_Mahalingam 10-Jan-14 0:45am

try this
int.TryParse(profileList[i].CurrencyID + "", out boatProfile.CurrencyID);

ahmed ali mohd 10-Jan-14 0:50am

same thing..tryparse has invalid arguments..is there any mscorlib problem?

Karthik_Mahalingam 10-Jan-14 0:53am

post your updated code here.. let me check.

ahmed ali mohd 10-Jan-14 0:59am

else { int s;

Int32.TryParse((profileList[i].CurrencyID), out s);

boatProfile.CurrencyID = s;

ahmed ali mohd 10-Jan-14 1:00am

it is giving s value as 0

Karthik_Mahalingam 10-Jan-14 1:09am

it means the profileList[i].CurrencyID is not a valid interger value in string format..
it should be a number value in string fromat, then only it will assign some value to the s variable..

ahmed ali mohd 10-Jan-14 1:24am

number is integer only right??

Karthik_Mahalingam 10-Jan-14 1:28am

yes.. offcourse.. eg : ( 1,2,34,4545445, 545, 0, 34 )
not ( 1s , 434GG , ee )

ahmed ali mohd 10-Jan-14 1:34am

ya ok...but what if i want to assign a string to an int??

ahmed ali mohd 10-Jan-14 1:35am

tryparse ,parse r not working

Karthik_Mahalingam 10-Jan-14 1:38am

its means your string is not in a valid format,
if it is valid format only the proper interger wil be resulted.
else it will be 0..

Gitanjali Singh · Answer 2 · 2014-01-09T17:46:00

Solution 1

C#

int j;
bool result = Int32.TryParse("-105", out j);
if (true == result)
    Console.WriteLine(j);
else
    Console.WriteLine("String could not be parsed.");

Refer:http://msdn.microsoft.com/en-us/library/bb397679.aspx[^]

This may help.

Posted 9-Jan-14 17:46pm

Gitanjali Singh

Comments

ahmed ali mohd 9-Jan-14 23:49pm

sting value caanot be converted to int??

Gitanjali Singh 9-Jan-14 23:53pm

is this the error you are getting?

ahmed ali mohd 9-Jan-14 23:56pm

nooo ..im getting int.Parse((profileList[i].CurrencyID)) threw a sysytem.formatException

ahmed ali mohd 9-Jan-14 23:59pm

it is an easy conversion but dont know y im getting this error..im laughing at myself

TrushnaK 10-Jan-14 0:02am

debug and check what you get in (profileList[i].CurrencyID) .

ahmed ali mohd 10-Jan-14 0:03am

im getting "Dkk" in (profileList[i].CurrencyID)

Ron Beyer 10-Jan-14 0:20am

when you call int.parse() with "Dkk" as the value, what do you expect would be the result? Maybe you don't understand what int.parse does, it attempts to take the input string "Dkk" in your case, and turn it into an integer. Since "Dkk" doesn't represent any kind of number, it gives you the format exception. Maybe it would help if you said what you expect the result to be...

Gitanjali Singh 10-Jan-14 0:23am

Agree!!

ahmed ali mohd 10-Jan-14 0:53am

thanx for the replies..boatProfile.CurrencyID is of type int?..i want to save the value of (profileList[i].CurrencyID) which is Dkk into boatProfile.CurrencyID . how to convert it?..this is my problem

TrushnaK · Answer 3 · 2014-01-09T18:17:00

Solution 2

try to convert like this:-

boatProfile.CurrencyID=Convert.ToInt16((profileList[i].CurrencyID));

You attempt to cast a numeric string to a numeric data type, following code shows example.

C#

string strInput = "10";
int intResult = 0;
try {
    intResult = Convert.ToInt16(strInput);
}
catch (Exception ex) {
    MessageBox.Show(("Error: " + ex.Message));
}

hope it helps...

Posted 9-Jan-14 18:17pm

TrushnaK

Updated 9-Jan-14 18:57pm

v2

Comments

ahmed ali mohd 10-Jan-14 0:20am

its not working :(

TrushnaK 10-Jan-14 0:23am

can you tell me data type of CurrencyID in boatProfile..

ahmed ali mohd 10-Jan-14 0:24am

public int? CurrencyID { get; set; } declared like this

TrushnaK 10-Jan-14 0:32am

hi ahemd..
as i given example i demonstrate that if you have value "10" as integer then you can convert to integer using convert.ToInt16 or convert.ToInt32 or int.Tryparse etc..
think that you try to convert "DK" to integer.
either change datatype of CurrencyID to string if it not required in integer or supply integer value as string through (profileList[i].CurrencyID).

Karthik_Mahalingam 10-Jan-14 0:47am

Hi Trushnak
you have posted VB code..
can you pls change it to C#. as the OP is posted with the label C#

TrushnaK 10-Jan-14 0:57am

thanx for point out...
i have updated my answer.

Suk@nta · Answer 4 · 2014-01-09T18:46:00

Solution 4

First of all u can't able to cast string of characters to int but can do if string contain value of integer.
below is the code snippet that i have tried and also it's working

C#

int j;
if (int.TryParse(profileList[i].CurrencyID, out j))
    boatProfile.CurrencyID = j;
else
    MessageBox.Show("string can not be coverted to int");

Posted 9-Jan-14 18:46pm

Suk@nta

Comments

ahmed ali mohd 10-Jan-14 0:57am

ya gud solution ..but j value is displaying as 0

Suk@nta 10-Jan-14 9:58am

yes..if you try to cast a string of character using 'TryParse()' methode to int then it gives output as 0 but returns false.
so according to my code it will execute else part but output will assign to j.

i unable to understand why u wants to cast a string of characters.
plz reply back..