Multiply textbox value with datagridview cell

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Is it possible to multiply a number in my textbox by a value in the datagridview cell?

What I have tried:

So far I've got this code, not sure if I'm going along the correct lines...

e.Row.Cells[1].Value = (Convert.ToInt32(e.Row.Cells[1].Value) * Convert.ToInt32(OdrQuantityTxtBx.Text)).ToString(); //put the cell number as position in your gridview

Posted 21-Feb-18 5:15am

Member 13512434

Updated 10-Nov-20 20:26pm

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Tim Carmichael · Answer 1 · 2018-02-21T05:49:00

Break the problem into multiple pieces.
Instead of trying to complete a single operation, define and assign variables for each portion.

So, part 1: get the cell value: e.Row.Cells[1].Value)
Before trying to convert in to an integer, check to see if it is numeric.
If it is, then convert it, otherwise reject it and don't try to build an output value

Part 2: get the text box value: OdrQuantityTxtBx.Text
As with part 1, check the value to see if it is a number

Assuming both values are numeric, produce the result: e * OdrQuantity

Convert that to a string and replace your cell value.