Cant get through this exception

Question

Hi friends I have this update button code below: protected void btnupdate_Click(object sender EventArgs e) { try { GridViewRow r1=gvProjectDetails.SelectedRow; int projectid=Convert.ToInt32(r1.Cells[1].Text); pobj.updateprojectdetails(projectid txtprojname.Text txtprojdescription.Text Convert.ToDateTime(txtstartdate.Text) Convert.ToDateTime(txtenddate.Text) Convert.ToInt32(drpteamsize.SelectedValue) Convert.ToInt32(txtduration.Text)drpstatus.SelectedItem.ToString()); lblmsg.Text = Project Details updated successfully; } catch (Exception exc) { string msg = Error:; msg += exc.Message; throw new Exception(msg); } populateGrid(); =============================== I have the same code for another page which works fine. But here i get a conversion failuer though i have converted(the red line in the code where i get this error). plzz correct me

Sam Hobbs · Answer

Thank you Nethra. That sure helps a lot. Try the following. You will want to modify this if this works but it should help determine the problem. try { GridViewRow r1=gvProjectDetails.SelectedRow; if (r1 == null) { MessageBox.Show(No Row Selected); return; } TableCell tc = r1.Cells[1]; if (tc == null) { MessageBox.Show(No second column); return; } int projectid; if (!Int32.TryParse(tc.Text out projectid)) { MessageBox.Show(Invalid data); return; } pobj.updateprojectdetails(projectid txtprojname.Text txtprojdescription.Text Convert.ToDateTime(txtstartdate.Text) Convert.ToDateTime(txtenddate.Text) Convert.ToInt32(drpteamsize.SelectedValue) Convert.ToInt32(txtduration.Text)drpstatus.SelectedItem.ToString()); lblmsg.Text = Project Details updated successfully; } catch (Exception exc) { string msg = Error:; msg += exc.Message; throw new Exception(msg); }

Sam Hobbs · Answer

If that is a new problem then please don't describe that new problem as if it is the same problem. If it is the same problem then you are being very vague again.

Nethra R S · Answer

Thanks Sam But there is one error . The team size does not get updated correctly which is a dropdownlist . For ex: i am selecting team size as 3 but it gets updated as 2 in sql table..

Nethra R S · Answer

Dear Sam int projectid=Convert.ToInt32(r1.Cells[1].Text); After this line it jumps to the catch block .. Actually it is not fetching the cell value from the gridview.. Same code work fines in another page. Got irritated

Sam Hobbs · Answer

Please tell us what is happening or not happening. Saying just i t's  still not working  does not tell us what needs to fix.

Nethra R S · Answer

Hi friends Its still not working. Plzz help

Sam Hobbs · Answer

Dorababu that is not the correct syntax for TryParse. It should be: int projectid; if (!Int32.TryParse(r1.Cells[1].Text out projectid)) // Error Doing that will guarantee that there will not be an error if the text is not in a valid format. The code might need to also ensure that r1.Cells[1] is valid.

Suthish Nair · Answer

Yes Dorababu it might be a serious bug. Lemme me point this to Admin. Thank You.

raghu v · Answer

hi netra  if u dont mind can u just present the sample data in one row with columns hope this would help us to understand what the data is

Dorababu Meka · Answer

WHen i click on this it is redirecting me to http://www.c-sharpcorner.com/Forums/Thread/057310/

Nethra R S · Answer

Hi I have attached the code files

raghu v · Answer

what is the value u have in the second column of the gridview row is it just an int or some string or decimal value like 1ser/12.03

Dorababu Meka · Answer

So can you attach your code with design page and also the sample output that you are getting after binding the data to grid view. By the way my name is Dorababu not Dorebabu

Nethra R S · Answer

@Dorebabu It does not work

Dorababu Meka · Answer

Can you attach that design and code page and also sample image with sample data in your grid view. May be your row data is not getting as per the statement you written that's why it is getting an exception Try this once before posting int projectid= int.TryParse (r1.Cells[1].Text);

Dorababu Meka · Answer

Oops sorry i have given the code for Datagridview in WInforms

Nethra R S · Answer

@Dorebabu How did u get those properties and methods? I am using VS 2008

Dorababu Meka · Answer

If not try as below Only from the first selected row DataGridviewRow dr = datagridView1.SelectedRows [0]; int projectid=Convert.ToInt32( dr.cells[cell name].value); or from the currentrow DataGridviewRow dr = datagridView1.CurrentRow; int projectid=Convert.ToInt32( dr.cells[cell name].value );

Dorababu Meka · Answer

Try this once int projectid=Convert.ToInt32(r1.Cells[1].value);

Mamta M · Answer

Dorababu That wont solve her error...the project id is present in the second cell which is referenced by index 1. Giving Cells[0] will retrieve some other column value but not the project id. Nethra when your current event is btn Click you are refering the SelectedRow of the gridview. Why not retrieve the project id in the events of the GridView?

Dorababu Meka · Answer

Attach the page then so that we have a look and try to resolve your issue

Nethra R S · Answer

@Dorebabu In the gridview control i have select linkbutton first and next is projectid and next ProjectName etc

Dorababu Meka · Answer

Try with cells[0] then

Nethra R S · Answer

Hi  All those who have replied i checked it. I have specified the correct index but still not getting the cell value..As Mamta said since its not fetching the cell value thats y i am getting that exception( Input string was not in a correct format ) My prob here is inspite of specifying the correct index y is it not taking the value?

Suthish Nair · Answer

check its Cells[1] or any other index value.

Mamta M · Answer

Nethra If r1.Cells[1].Text) is blank or null then that could result in an exception. Set a breakpoint there and determine if this is a null value. Trying to convert a null value to int will result in an exception. Hope this helps.

Dorababu Meka · Answer

Can you post the exception or Error what you are getting