Sum multi columns in datagrideview and add in footer

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these code work with me to sum one column in datagrideview but i want to sum multi columns in datagrideview

C#

decimal sum1 = 0, sum2 = 0;
            for (int i = 0; i < dgw.RowCount; i++)
            {
                // we only sum the first and third column as an example
                sum1 += Convert.ToDecimal(dgw.Rows[i].Cells[4].Value);
                sum2 += Convert.ToDecimal(dgw.Rows[i].Cells[5].Value);
            }
            // add the total row
            string[] totalrow = new string[] { sum1.ToString(), "", sum2.ToString() };
            dgw.Rows.Add(totalrow);
            // add a rowheadertitle
            dgw.RowHeadersWidth = 60;
            dgw.Rows[dgw.RowCount - 1].HeaderCell.Value = "Total";

What I have tried:

these code work with me to sum one column in datagrideview but i want to sum multi columns in datagrideview

Posted 5-Jan-18 18:45pm

Mahmoud Magdy Mousaa

Updated 6-Jan-18 23:54pm

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Comments

Karthik_Mahalingam 6-Jan-18 1:15am

so what is the issue ?

Dotnet_Dotnet 6-Jan-18 1:19am

decimal sum1 = 0, sum2 = 0,sum3 =0;
for (int i = 0; i < dgw.RowCount; i++)
{
// we only sum the first and third column as an example
sum1 += Convert.ToDecimal(dgw.Rows[i].Cells[4].Value);
sum2 += Convert.ToDecimal(dgw.Rows[i].Cells[5].Value);
sum3 = sum3 + (sum1+ sum2);
}
// add the total row
string[] totalrow = new string[] { sum1.ToString(), "", sum2.ToString() };
dgw.Rows.Add(totalrow);
// add a rowheadertitle
dgw.RowHeadersWidth = 60;
dgw.Rows[dgw.RowCount - 1].HeaderCell.Value = "Total";

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Maciej Los · Answer 1 · 2018-01-06T23:54:00

Mahmoud Magdy Mousaa[^] wrote:
these code work with me to sum one column in datagrideview but i want to sum multi columns in datagrideview

Are you sure?
You want to sum the first and third column , but you refer to Cells[4] and Cells[5]

C#

sum1 += Convert.ToDecimal(dgw.Rows[i].Cells[4].Value);
sum2 += Convert.ToDecimal(dgw.Rows[i].Cells[5].Value);

Also, the way you add new row is wrong:

C#

string[] totalrow = new string[] { sum1.ToString(), "", sum2.ToString() };

The size of array have to be equal to the count of cells!

For example:

C#

// Set the column header names.
dataGridView1.Columns[0].Name = "Recipe";
dataGridView1.Columns[1].Name = "Category";
dataGridView1.Columns[2].Name = "Main Ingredients";
dataGridView1.Columns[3].Name = "Rating";

// Populate the rows.
//ColNo                              0          1           2           3
string[] row1 = new string[] { "Meatloaf", "Main Dish", "ground beef", "**" };
dataGridView1.Rows.Add(row1);

For further details, please see: DataGridView.Rows Property (System.Windows.Forms)[^]