Need help converting GridViewCommand EventArg CommandArgument to an integer

[keithb]

I have a command button in GridView row that fires the RowCommand Event when
clicked. The event handler looks like this:

protected void grid_RowCommand (Object sender, GridViewCommand EventArgs e)
{
int rowIndex = Convert.ToInt32 (e.CommandArgum ent);

When this code runs it triggers an "Input string was not in a correct
format" error.

According to Microsoft documentation, the rowindex value is an integer, so I
do not know how to troublshoot this problem. Can someone offer a suggestion?

Thanks,

Keith

PS Here is the error message with stack trace info in case that is useful:

Input string was not in a correct format.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.

Exception Details: System.FormatEx ception: Input string was not in a correct
format.

Source Error:
Line 107: // Convert the row index stored in the CommandArgument
Line 108: // property to an Integer.
Line 109: int rowIndex = Convert.ToInt32 (e.CommandArgum ent);
Line 110: // Retrieve the row that contains the button clicked
Line 111: // by the user from the Rows collection.
Source File: c:\local_websit es\btm_root\Use rControls\Rem.a scx.cs Line:
109

Stack Trace:
[FormatException : Input string was not in a correct format.]
System.Number.S tringToNumber(S tring str, NumberStyles options,
NumberBuffer& number, NumberFormatInf o info, Boolean parseDecimal) +2753539
System.Number.P arseInt32(Strin g s, NumberStyles style, NumberFormatInf o
info) +102
System.String.S ystem.IConverti ble.ToInt32(IFo rmatProvider provider) +43
System.Convert. ToInt32(Object value) +25
UserControls_Re m.grid_RowComma nd(Object sender, GridViewCommand EventArgs
e) in c:\local_websit es\btm_root\Use rControls\Rem.a scx.cs:109
System.Web.UI.W ebControls.Grid View.OnRowComma nd(GridViewComm andEventArgs
e) +96
System.Web.UI.W ebControls.Grid View.HandleEven t(EventArgs e, Boolean
causesValidatio n, String validationGroup ) +121
System.Web.UI.W ebControls.Grid View.OnBubbleEv ent(Object source, EventArgs
e) +162
System.Web.UI.C ontrol.RaiseBub bleEvent(Object source, EventArgs args) +56
System.Web.UI.W ebControls.Grid ViewRow.OnBubbl eEvent(Object source,
EventArgs e) +118
System.Web.UI.C ontrol.RaiseBub bleEvent(Object source, EventArgs args) +56
System.Web.UI.W ebControls.Imag eButton.OnComma nd(CommandEvent Args e) +106
System.Web.UI.W ebControls.Imag eButton.RaisePo stBackEvent(Str ing
eventArgument) +200
System.Web.UI.W ebControls.Imag eButton.System. Web.UI.IPostBac kEventHandler.R aisePostBackEve nt(String
eventArgument) +31
System.Web.UI.P age.RaisePostBa ckEvent(IPostBa ckEventHandler
sourceControl, String eventArgument) +32
System.Web.UI.P age.RaisePostBa ckEvent(NameVal ueCollection postData) +72
System.Web.UI.P age.ProcessRequ estMain(Boolean
includeStagesBe foreAsyncPoint, Boolean includeStagesAf terAsyncPoint) +3839

[keithb]

Replying to my own question for the benefit of other newbies: It turns out
that the example I was following was wrong. GridViewCommand EventArgs does
not contain row index information. It is necessary to pass identifying
information as a CommandArgument .

Keith

"keithb" <kb******@dslex treme.com> wrote in message
news:eT******** ******@TK2MSFTN GP03.phx.gbl...

I have a command button in GridView row that fires the RowCommand Event
when clicked. The event handler looks like this:

protected void grid_RowCommand (Object sender, GridViewCommand EventArgs e)
{
int rowIndex = Convert.ToInt32 (e.CommandArgum ent);

When this code runs it triggers an "Input string was not in a correct
format" error.

According to Microsoft documentation, the rowindex value is an integer, so
I do not know how to troublshoot this problem. Can someone offer a
suggestion?

Thanks,

Keith

PS Here is the error message with stack trace info in case that is useful:

Input string was not in a correct format.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.

Exception Details: System.FormatEx ception: Input string was not in a
correct format.

Source Error:
Line 107: // Convert the row index stored in the CommandArgument
Line 108: // property to an Integer.
Line 109: int rowIndex = Convert.ToInt32 (e.CommandArgum ent);
Line 110: // Retrieve the row that contains the button clicked
Line 111: // by the user from the Rows collection.
Source File: c:\local_websit es\btm_root\Use rControls\Rem.a scx.cs Line:
109

Stack Trace:
[FormatException : Input string was not in a correct format.]
System.Number.S tringToNumber(S tring str, NumberStyles options,
NumberBuffer& number, NumberFormatInf o info, Boolean parseDecimal)
+2753539
System.Number.P arseInt32(Strin g s, NumberStyles style, NumberFormatInf o
info) +102
System.String.S ystem.IConverti ble.ToInt32(IFo rmatProvider provider) +43
System.Convert. ToInt32(Object value) +25
UserControls_Re m.grid_RowComma nd(Object sender, GridViewCommand EventArgs
e) in c:\local_websit es\btm_root\Use rControls\Rem.a scx.cs:109
System.Web.UI.W ebControls.Grid View.OnRowComma nd(GridViewComm andEventArgs
e) +96
System.Web.UI.W ebControls.Grid View.HandleEven t(EventArgs e, Boolean
causesValidatio n, String validationGroup ) +121
System.Web.UI.W ebControls.Grid View.OnBubbleEv ent(Object source,
EventArgs e) +162
System.Web.UI.C ontrol.RaiseBub bleEvent(Object source, EventArgs args)
+56
System.Web.UI.W ebControls.Grid ViewRow.OnBubbl eEvent(Object source,
EventArgs e) +118
System.Web.UI.C ontrol.RaiseBub bleEvent(Object source, EventArgs args)
+56
System.Web.UI.W ebControls.Imag eButton.OnComma nd(CommandEvent Args e) +106
System.Web.UI.W ebControls.Imag eButton.RaisePo stBackEvent(Str ing
eventArgument) +200

System.Web.UI.W ebControls.Imag eButton.System. Web.UI.IPostBac kEventHandler.R aisePostBackEve nt(String
eventArgument) +31
System.Web.UI.P age.RaisePostBa ckEvent(IPostBa ckEventHandler
sourceControl, String eventArgument) +32
System.Web.UI.P age.RaisePostBa ckEvent(NameVal ueCollection postData) +72
System.Web.UI.P age.ProcessRequ estMain(Boolean
includeStagesBe foreAsyncPoint, Boolean includeStagesAf terAsyncPoint) +3839