Input string was not in a correct format.

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I have a problem with my code.i am selecting a row from a grid view using radio button and inserting the data into another table.But while inserting i am getting a error like Input string was not in a correct format.my code is below.Please anyone help resolving this error.

C#

 protected void txtorderitem_Click(object sender, EventArgs e)
{
        string sno=null;
        RadioButton check = new RadioButton();
        foreach (GridViewRow dgi in grdfirmord.Rows)
        {

            check = (RadioButton)dgi.FindControl("rdbtn");
            if (check != null)
            {
                if (check.Checked)
                {
                    check.Checked = true;
                    sno = grdfirmord.DataKeyNames.ToString();
                }
            }
        }
        stPeriodicalDet obGet = new stPeriodicalDet();
        obGet.OrderNo = clsDbCommon.ORDAutoNO("OrderNo", "PeriodicalOrderDetails").ToString();
        obGet.SubscriptionNo = Convert.ToInt32(sno.ToString());
        Int32 Succ = Periodicalcls.InsertPeriodicalOrderDetails(ref obGet);
}

i am getting error in obGet.Subscription=....
Thank you

Posted 11-Aug-13 20:46pm

Member 10194425

Updated 11-Aug-13 20:52pm

Joezer BH

v3

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Syed Shabeer 12-Aug-13 2:54am

Can you debug and find out what actually are you getting in "sno = grdfirmord.DataKeyNames.ToString();" ?

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**Joezer BH** · Answer 1 · 2013-08-11T20:55:00

The ToString() method of the sno variable is producing a string that the .NET framework does not know how to convert to an Int.

Try to debug,
stop at the line:

C#

sno = grdfirmord.DataKeyNames.ToString();

or at

C#

obGet.SubscriptionNo = Convert.ToInt32(sno.ToString());

and see what the value of sno is, you will probably pretty soon find the issue.

* BTW, sno is already a string, and you convert it to string again in the second line there.

Cheers,
Edo

CPallini · Answer 2 · 2013-08-11T21:26:00

Quote:
obGet.SubscriptionNo = Convert.ToInt32(sno.ToString());

In this line you have:

Called ToString() on a string.
Called Convert.ToInt32 without providing the appropriate exception-handling code.

Point 1 is a minor flaw, you are just doing a useless call.
Point 2, on the other hand should be fixed, since you are never sure that input string is in a correct numeric format. You have either to:

Provide the exception handling code.

or

call the Int32.TryParse[^] method instead of Convert.ToInt32 (you have, of course, to check TryParse return value, handling failures).

ErBhati · Answer 3 · 2013-08-11T21:38:00

Solution 3

I think the code

XML

<pre>obGet.SubscriptionNo = Convert.ToInt32(sno.ToString()); genrate the error
if radio button not selected

then sno=null;</pre>
and
obGet.SubscriptionNo = Convert.ToInt32(sno.ToString()); gives the error

if it helps please select asnswer..

Posted 11-Aug-13 21:38pm

ErBhati

Input string was not in a correct format.

3 solutions

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Solution 2

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