unhandled exception input string was not in a correct format when click on gridview row, code work on other machine

Question

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unhandled exception input string was not in a correct format when click on gridview row,
code work on other machine.
Code:

C#

int index = Convert.ToInt32(e.CommandName.ToString());
txtname.Text = Convert.ToString(gridview1.Rows[index].Cells[2].Text.ToString());

Following Exception Details:
Server Error in '/' Application.
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.FormatException: Input string was not in a correct format.

Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:
[FormatException: Input string was not in a correct format.]
System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +9594283
System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) +119
System.Convert.ToInt32(String value, IFormatProvider provider) +48
System.Web.UI.WebControls.GridView.HandleEvent(EventArgs e, Boolean causesValidation, String validationGroup) +1047
System.Web.UI.WebControls.GridView.RaisePostBackEvent(String eventArgument) +210
System.Web.UI.WebControls.GridView.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +176
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1

Thanks

Posted 14-Oct-13 4:07am

Mahesh_Bhosale

Updated 14-Oct-13 4:09am

v2

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Comments

ZurdoDev 14-Oct-13 10:25am

The error explains that you are trying to convert something to int that is not an int. Likely Convert.ToInt32(e.CommandName.ToString()); CommandName will be "Edit", "Delete" or something like that so you can't convert to int.

Mahesh_Bhosale 14-Oct-13 10:29am

but iam not trying to convert anything to int that is not an int.
these work on another computer but not working on my machine, i trouble from this .

ZurdoDev 14-Oct-13 10:58am

What is e.CommandName.ToString()

Mahesh_Bhosale 14-Oct-13 11:04am

protected void gridview1_RowDataBound(object sender, GridViewRowEventArgs e)
{
int index = Convert.ToInt32(e.CommandName.ToString());
txtname.Text = Convert.ToString(gridview1.Rows[index].Cells[2].Text.ToString());
}

here e is GridView Row Event Argument

ZurdoDev 14-Oct-13 11:10am

What is the value of e.CommandName.ToString()

Mahesh_Bhosale 14-Oct-13 11:12am

1

ZurdoDev 14-Oct-13 11:13am

So, which line of code is failing?

Mahesh_Bhosale 14-Oct-13 11:16am

its working on another computer,but not working on my computer..

ZurdoDev 14-Oct-13 11:19am

So, which line of code is failing?

Mahesh_Bhosale 14-Oct-13 11:20am

don't know which line of code is failing.

ZurdoDev 14-Oct-13 11:22am

If it's on your computer can't you debug it? The error isn't lying. You are trying to convert something that is invalid. Just debug it and find it.

Mahesh_Bhosale 14-Oct-13 11:27am

thanks friend

2 solutions

Solution 1

You can debug and see whats the value in

e.CommandName.ToString()

which may be something other than a int

Or Try changing

int index = Convert.ToInt32(e.CommandName.ToString());

to

C#

int result;
bool check = int.TryParse(e.CommandName.ToString(),out result)

This will help you to check whether the conversion is failing or not. Then proceed.

Posted 14-Oct-13 5:41am

JoCodes

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Mahesh_Bhosale · Accepted Answer · 2013-10-14T22:49:00

i solved this problem:

just change in row data bound
This only occurs because I happened to use the same CommandName that the CLR code uses (Select$)
If I change this to SelectRow$, I no longer get the error.

C#

e.Row.Attributes["onclick"] = ClientScript.GetPostBackClientHyperlink(this.gridview1, "SelectRow$" + e.Row.RowIndex.ToString(), false);

and in row command
change

C#

int index = Convert.ToInt32(e.CommandArgument.ToString());