Input string was not in a correct format.

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C#

protected void gvCartView_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "Remove")
        {
            int ProductId = Convert.ToInt32(e.CommandArgument);
            ShoppingCart.Instance.RemoveItem(ProductId);
        }
   }

I have tried everything. Can someone help me out.

Posted 20-Jun-14 2:24am

Member 10878414

Updated 20-Jun-14 2:36am

Thanks7872

v2

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Comments

ZurdoDev 20-Jun-14 8:30am

The error means that e.CommandArgument is not an Integer. All you have to do is debug it.

Thanks7872 20-Jun-14 8:37am

Should be posted as solution. Go for it.

Bernhard Hiller 20-Jun-14 8:48am

e.CommandName = "Remove";
e.CommandArgument = "Bacon";
=> input string was not in correct format

PIEBALDconsult 20-Jun-14 9:02am

And never use Convert.

Sergey Alexandrovich Kryukov 20-Jun-14 14:09pm

There are more rare cases when Convert really should be used. But when Parse/TryParse can do the job, I advice to prefer it.
—SA

3 solutions

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Peter Leow · Answer 1 · 2014-06-20T02:35:00

Solution 1

The error said that the string you are trying to parse an integer from does not actually contain a valid integer.
You should use Int32.TryParse[^] method.

Posted 20-Jun-14 2:35am

Peter Leow

RaisKazi · Answer 2 · 2014-06-20T09:53:00

You need to set CommandArgument to RowIndex as below, if you want to use it in the RowCommand event of your GridView.

HTML

CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" />

Have a look at below link for more details on this.

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.gridview.rowcommand(v=vs.110).aspx

agent_kruger · Answer 3 · 2014-06-20T14:43:00

Solution 3

sir, you can use try parse with "e.CommandArgument" it will help you get the right result.

Posted 20-Jun-14 14:43pm

agent_kruger