vb.net - How to calculate the sum of a column from set of rows based on a condition in gridview? -


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i new vb.net , want find sum of quantity batchids equal. in example, answer should 'pan-new'= 4,vsd-1850=2 aim check result current stock before invoicing. how in vb.net? please me

loop through datagridview , check if row satisfies condition add.

for each row datagridviewrow in datagridview1.rows    if row.cells(2).value = "pan-new"       quantitysum = quantitysum + integer.parse(row.cells(4).value)    end if next

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