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How to sum of two rows values inside the DataGridView, and create one new row in the DataGrid and display the result.
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You need to get the string value of the i-Row like this:
string sValueOne = yourDataGridView.Rows[i].Cells[j].Value;

Then the value of the next row:
string sValueOne = yourDataGridView.Rows[i+1].Cells[j].Value;

Now you need to convert the strings to decimal / double / whatever and sum the values.

To add new row you can do something like this:
DataGridViewRow row = (DataGridViewRow)yourDataGridView.Rows[i].Clone();
yourDataGridView.Rows.Add(row);
   
Comments
Mekalamani 18-Sep-15 8:41am
   
Thanks for your reply.
add means plus the values.
I mean I want plus the first row and second row value and display in third row, Like that

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