object instantiation

  • Thread starter Thread starter Carlos
  • Start date Start date
C

Carlos

Hi all,

I have the following code snipet that is causing an exception when
processing
a gridview with checkboxes How can I fix it ? Thanks in advance, Carlos.

GridViewRow row = GridView7.Rows;

bool isChecked = ((CheckBox)row.FindControl("chkSelect")).Checked;
 
It would be helpful to know what the exception is?


Hi all,

I have the following code snipet that is causing an exception when
processing
a gridview with checkboxes How can I fix it ? Thanks in advance, Carlos.

GridViewRow row = GridView7.Rows;

bool isChecked = ((CheckBox)row.FindControl("chkSelect")).Checked;
Click to expand...
 
Hi Robert,

sure, and I am sorry. it is:

Object reference not set to an instance of an object

Thanks again,

Carlos.

Robert Porter said:
It would be helpful to know what the exception is?


Hi all,

I have the following code snipet that is causing an exception when
processing
a gridview with checkboxes How can I fix it ? Thanks in advance, Carlos.

GridViewRow row = GridView7.Rows;

bool isChecked = ((CheckBox)row.FindControl("chkSelect")).Checked;
Click to expand...
Click to expand...
 
On that kind of situation, you need to break it apart, to figure out the
exact cause.

GridViewRow row = GridView7.Rows;

//is row null?

object abc = row.FindControl("chkSelect");

//is abc null?

CheckBox ccc = abc as CheckBox;

//is ccc null?

bool isChecked = ccc.Checked;

...
 
Thanks Sloan,

I inspected the gridview row count first, and I got 10,
then each particular row, and the instances were there.

any other suggestion?

Thanks again,

Carlos.

sloan said:
On that kind of situation, you need to break it apart, to figure out the
exact cause.

GridViewRow row = GridView7.Rows;

//is row null?

object abc = row.FindControl("chkSelect");

//is abc null?

CheckBox ccc = abc as CheckBox;

//is ccc null?

bool isChecked = ccc.Checked;

..





Carlos said:
Hi all,

I have the following code snipet that is causing an exception when
processing
a gridview with checkboxes How can I fix it ? Thanks in advance, Carlos.

GridViewRow row = GridView7.Rows;

bool isChecked = ((CheckBox)row.FindControl("chkSelect")).Checked;
Click to expand...
Click to expand...
 
Hi,
Thanks Sloan,

I inspected the gridview row count first, and I got 10,
then each particular row, and the instances were there.

any other suggestion?

Thanks again,

Carlos.
Click to expand...

Obviously, either "GridView7" or "row" are null, or "chkSelect" doesn't
exist. I think it's the later one. "Object not set" exceptions are
fairly easy to trace, though, especially in debug mode.

Set a breakpoint in your code, and inspect what
row.FindControl("chkSelect") evaluates to. I am pretty sure that it's
null. Maybe you mistyped the ID.

HTH,
Laurent
 
Thank you Laurent! that did it indeed, I had the 't' appearing double
in the control code.

Thanks again!

Carlos.
 
Back
Top