calculate rows based on previous row in datatable

Question

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hi i have a datatable with 3 columns : debt , credit , remain, type

all cells now are filled like below :

debt/credit/remain/type
100   0     100    debt
200   0     300    debt
0     500   500    credit
0     200   200    credit
50    0     50     debt
150   0     150    debt
50    0     50     debt
5000  0     5000   debt

now i want to calculate remain column like below :

debt/credit/remain/type
100   0     100    debt
200   0     300    debt
0     500   200    credit
0     200   400    credit
50    0     350    credit
150   0     200    credit
50    0     150    credit
5000  0     4950   debt

thanks a lot

Posted 9-Dec-14 2:07am

Esmaeil Ebrahimi

Updated 9-Dec-14 19:58pm

Maciej Los

v3

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Comments

Tomas Takac 9-Dec-14 8:29am

The remaining amount doesn't seem to be correct. In foirst two rows it should be negative (-100, -300) and the last one should be -4850. BTW what did you try? This doesn't seem to be overly complicated.

[no name] 28-Dec-14 14:04pm

thanks,this solved

Sinisa Hajnal 9-Dec-14 8:36am

Also, which database? This is fairly easily done in database query, look it up.

[no name] 28-Dec-14 14:04pm

thanks,this solved

Praveen Kumar Upadhyay 9-Dec-14 8:49am

Can you please explain what is your calculation logic

Maciej Los 10-Dec-14 2:00am

What have you done?
Where are you stuck?
Where data comes from?

[no name] 28-Dec-14 14:04pm

thanks,this solved

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_Maxxx_ · Answer 1 · 2014-12-09T18:54:00

Solution 1

In your datatable, probably, the last row is number (datatable.Rows.Count-1)

So the 'cell' can be accessed at

var remain = datatable.Rows[datatable.Rows.Count-1]["remain"];

so you can now calculate the new value for the row you are adding.

Posted 9-Dec-14 18:54pm

_Maxxx_

Comments

[no name] 28-Dec-14 14:05pm

thanks,this solved