What are the reasons for crash while adding rows in datagrid ?

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hi all,

I just want to know all the reasons why a call to a datagrid.row.add(drRow) raises an exception and hence crash .

I am facing this situation when adding some rows in the datagrid .

It raises exception " Access reading violation 0x0000000000"

What I have tried:

I tried clearing the datagrid before populating it but no help.
Actually the situation is this .I have a tree structure which has some nodes and these same nodes with the properties values gets populated into the datagrid .
Now whenever I sort the data in the datagrid by click on its header and then click the root node in the tree structure it crashes and the crash happens at this position where I populate the datagrid .
The same thing does not happen when I click on the root node without sorting the datagrid.

Posted 1-Apr-18 20:43pm

iampradeepsharma

Updated 1-Apr-18 23:48pm

v4

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Comments

Richard MacCutchan 2-Apr-18 3:09am

Most likely you have a null reference somewhere. Use your debugger to find out where.

GKP1992 2-Apr-18 3:48am

Shouldn't this be datagrid.rows.add(drRow)?

iampradeepsharma 2-Apr-18 4:11am

Yes it is ..sorry for the typo .But in actual code it is .rows only.

iampradeepsharma 2-Apr-18 5:49am

what does it mean " object reference not set to an instance of an object" in the case of adding row in the datagrid ?

iampradeepsharma 2-Apr-18 5:49am

what does it mean " object reference not set to an instance of an object" in the case of adding row in the datagrid ?

iampradeepsharma 2-Apr-18 6:25am

To my surprise first row gets populated but for second row onwards it crashes.

GKP1992 2-Apr-18 7:45am

Check what is null. While debugging you will find the line on which the exception appears. Check if one of datagrid or datagrid.row are null.

iampradeepsharma 4-Apr-18 4:18am

The Crash removes if I reset the datatable before I populate it but again a new issue comes in which is the datagrid does not show any data until its one of the column is clicked .

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