删除行并保存DataGridView

Question

I haven't done too much with DataGridViews in C# form applications so my approach is a rookie one I'm sure. Any help would be awesome!

My form is displaying the DataGridView for my database, and I want to give the user the option of deleting a particular row that is selected and then saving the changes.

Here is my code:

    private void btnDeleteCustomer_Click(object sender, EventArgs e)
    {
        foreach (DataGridViewRow item in this.dataGridView1.SelectedRows)
        {
            dataGridView1.Rows.RemoveAt(item.Index);
            dataGridView1.SelectAll();

        }
    }

    private void btnSelectAll_Click(object sender, EventArgs e)
    {
        dataGridView1.SelectAll();
    }

I am attempting to delete the selected row, then select all of the remaining rows, and then save the selected remaining rows with the click of one button. I'm sure there is a better way of doing so but I can't find a solution that works. Thanks!

Answer 1

I don't see that there's a big difference, But you could delete rows in different ways, You might want to consider using extension methods to extend the datagridview functionality with ease, For example:

public static class DataGridViewExtensions
    {
        public static void DeleteSelectedRows(this DataGridView dgv)
        {
            foreach (DataGridViewRow row in dgv.SelectedRows)
                dgv.Rows.Remove(row);
        }
    }

And you could simply call this function like this

dataGridView1.DeleteSelectedRows();

Answer 2

        Int32 rowToDelete = dataGridView1.Rows.GetFirstRow(DataGridViewElementStates.Selected);
        if (rowToDelete > -1)
        {
          dataGridView1.Rows.RemoveAt(rowToDelete);

          dataGridView1.Invalidate();
          string lastName = (string)dataGridView1.Rows[rowToDelete].Cells[0].Value;
          string firstName = (string)dataGridView1.Rows[rowToDelete].Cells[1].Value;
          string email = (string)dataGridView1.Rows[rowToDelete].Cells[2].Value;
          string phoneNumber = (string)dataGridView1.Rows[rowToDelete].Cells[3].Value;
          string address = (string)dataGridView1.Rows[rowToDelete].Cells[4].Value;
          string instagram = (string)dataGridView1.Rows[rowToDelete].Cells[5].Value;
          string carMake = (string)dataGridView1.Rows[rowToDelete].Cells[6].Value;
          string carModel = (string)dataGridView1.Rows[rowToDelete].Cells[7].Value;
          string additionalNotes = (string)dataGridView1.Rows[rowToDelete].Cells[8].Value;
          SqlConnection CustomerInfo = new SqlConnection("Data Source=.\\SQLEXPRESS;AttachDbFilename=C:\\Users\\Cory\\Desktop\\DeluxWrapsWindows\\DeluxWrapsWindows\\DeluxWraps.mdf;Integrated Security=True;User Instance=True");
          {
             SqlCommand xp = new SqlCommand("DELETE FROM CustomerInfo WHERE LastName='" + lastName + "' AND FirstName='" + firstName + "'");

             CustomerInfo.Open();
             xp.ExecuteNonQuery();
             CustomerInfo.Close();
          }
        }