从网格视图将多个数据插入数据库

Question

I already have some data into the grid view. Now I want to insert multiple rows into gridview then how to do it?

If I go for foreach loop then it will take count of all the rows already there and insert the data multiple times. Instead I want to into new rows only

Below is my Code

    private void userInsert()
    {
        if (MessageBox.Show("Do you want to add the new  data ?", "Confirm ", MessageBoxButtons.YesNo,MessageBoxIcon.Question) == DialogResult.Yes)
        {
            cmd.Connection = con;
            cmd.CommandType = CommandType.Text;
            try
            {

                foreach (GridViewRow dRow in userDataGridView.Rows)
                {
                    cmd.CommandText = string.Format("insert into users(first_name,last_name,default_rate,default_location,spi_user_id,nickname) values('{0}','{1}',{2},{3},{4},'{5}')", userDataGridView.CurrentRow.Cells[0].Value.ToString(), userDataGridView.CurrentRow.Cells[1].Value.ToString(), userDataGridView.CurrentRow.Cells[2].Value.ToString(), locationID2ComboBox.SelectedValue, userDataGridView.CurrentRow.Cells[4].Value.ToString(), userDataGridView.CurrentRow.Cells[5].Value.ToString());
                    con.Open();
                    cmd.ExecuteNonQuery();
                }
                MessageBox.Show("Your data has been added successfully ", "Saved info", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                con.Close();
                userSelect();
            }
        }
    }

Answer 1

Either keep track which rows were inserted (may be done using Tag property for example, or modify your SQL query to check if data is already present

if not exists (select top 1 * from users u where u.first_name = '{0}' and u.last_name = '{1}')
   insert into users(first_name,last_name,default_rate,default_location,spi_user_id,nickname) 
   values('{0}','{1}',{2},{3},{4},'{5}'

you may need more argument checks for uniqueness. Also I suggest using parameters with SqlCommand .

If you want use Tag property (only when it is Winforms project!):

foreach (GridViewRow dRow in userDataGridView.Rows)
{
    var check = dRow.Tag as bool? ?? false; //was row already processed?

    if (check)
    {
        continue;
    }

    cmd.CommandText = string.Format("insert into users(first_name,last_name,default_rate,default_location,spi_user_id,nickname) values('{0}','{1}',{2},{3},{4},'{5}')", userDataGridView.CurrentRow.Cells[0].Value.ToString(), userDataGridView.CurrentRow.Cells[1].Value.ToString(), userDataGridView.CurrentRow.Cells[2].Value.ToString(), locationID2ComboBox.SelectedValue, userDataGridView.CurrentRow.Cells[4].Value.ToString(), userDataGridView.CurrentRow.Cells[5].Value.ToString());
    con.Open();
    cmd.ExecuteNonQuery();

    dRow.Tag = true;
}

Answer 2

What is user id and who generate it ?

If user id is 0 for new user its simple

foreach (GridViewRow dRow in userDataGridView.Rows)
                {
                  if(userDataGridView.CurrentRow.Cells[<user id index>]==0)
                       {
                        //add into DB 
                        }

                }

hope this help

Answer 3

You can use this event to add new record:

private void dataGridView1_UserAddedRow(object sender, DataGridViewRowEventArgs e)
{
     //e.Row.Cells[0].Value <-- Use 'e.Row' argument to access the new row
}