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Null Reference Exception
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Hi

My form is an calculator, i mean we have lot of textboxes by which we give inputs so the calculated values are shown in the grid.

I create summaries programmatically and set the formulas for those.

If the formula is just the sum of the column its showing the correctly, but if its has formula like  sum [column1]/ [sum column2 ] its works for the first time the form loads i.e if the sum column2 is 0 the I am setting the summary value as 0. So when the form loads the value it showing is 0.

But if we try to change or type anything in the textboxes, its crashing or showing the exception as Null reference exception. In debugger mode, the exception is occurring  where the form is being instantiated to display the form (Null reference exception).

I am using the UltraCalcManager in the form. I am getting the exception when we have UltraCalcManager in the form. 

If I remove the UltraCalcManager from the form then except for the summary value every thing is working fine.

Someone please help me to solve this above mentioned problem

Thanks in advance

Navi 

 

 

 


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