Question

How can I loop through the rows of a DataGridView one at a time (I have 2 columns), then store those 2 columns in a variable that will be used as a parameter for an sql query?

foreach (DataGridViewRow Datarow in contentTable_grd.Rows)
{
    contentValue1 = Datarow.Cells[0].Value.ToString();
    contentValue2 = Datarow.Cells[1].Value.ToString();
    
    SqlParameter param4 = new SqlParameter("@contentTableValue1", contentValue1);
    SqlParameter param5 = new SqlParameter("@contentTableValue2", contentValue2);
}

I’m getting this error when using the above code:

Object reference not set to an instance of an object.

Answer 1

Found the problem I needed an if statement to prevent empty cells from going through

    foreach (DataGridViewRow Datarow in contentTable_grd.Rows)
    {
        if (Datarow.Cells[0].Value != null && Datarow.Cells[1].Value != null)
        {
            contentValue1 = Datarow.Cells[0].Value.ToString();
            contentValue2 = Datarow.Cells[1].Value.ToString();
            MessageBox.Show(contentValue1);
            MessageBox.Show(contentValue2);
        }

    }