Can't update record after call another form

Question

I have a problem about .update() method Say that I have a table Currency with fields: Name, Symbol, Rate, and Country.
Form1 have a datagrid and button Edit, Form2 have a detail of selected record from Form1 in textbox.
So my problem is when I edit record in form2 and save it, datatable have change but not the database in server. am I missing something?
this is my code:
Form1
------
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using KK.Class;
namespace KK
{
namespace Master.Forms
{
public partial class Currency : Form
{
public SqlDataAdapter da = null;
public DataTable dt = null;
//public BindingSource bs = null;
//public DataSet ds;
private string sql = null;
//public DataViewManager dv;
public CurrencyManager myCurrencyManager = null;
public SqlCommandBuilder cb;
public Currency()
{
InitializeComponent();
}
private void Currency_Load(object sender, EventArgs e)
{
Connection con = new Connection();
sql = "select * from currency";
da = new SqlDataAdapter(sql, con.open_connection());
cb = new SqlCommandBuilder(da);
//ds = new DataSet();
dt = new DataTable();
//da.TableMappings.Add("Table", "Currency");
da.Fill(dt);
//bs = new BindingSource();
//bs.DataSource = dt;
grid_currency.DataSource = dt;
//da.Fill(ds);
//bs = new BindingSource();
//bs.DataSource = ds.Tables["Currency"];
//da.Fill(ds);
//grid_currency.DataSource = bs;
//dv = ds.DefaultViewManager;
txt_tes.DataBindings.Add("Text", dt, "Name");
myCurrencyManager = (CurrencyManager)this.BindingContext[dt];
//myCurrencyManager.Position = 0;
}
private void cmd_edt_Click(object sender, EventArgs e)
{
int position = Convert.ToInt32(myCurrencyManager.Position.ToString());
Currency_det currency_det = new Currency_det(da, dt, position);
currency_det.BindingContext = this.BindingContext;
if (currency_det.ShowDialog() == DialogResult.OK)
{
dt.AcceptChanges();
grid_currency.Refresh();
}
}
private void cmd_del_Click(object sender, EventArgs e)
{
try
{
grid_currency.Rows.RemoveAt(grid_currency.CurrentRow.Index);
da.Update(dt);
MessageBox.Show("Data success updated");
}
catch
{
MessageBox.Show("Data fail updated");
}
}
private void cmd_ext_Click(object sender, EventArgs e)
{
this.Close();
}
}
}
}
Form2
------
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace KK
{
namespace Master.Forms
{
public partial class Currency_det : Form
{
public DataTable dtt;
public SqlDataAdapter dat;
public CurrencyManager myCurrencyManager;
int position;
public SqlCommandBuilder cb;
public Currency_det(SqlDataAdapter dAdapter ,DataTable dTable,int pos)
{
position = pos;
dtt = dTable;
dat = dAdapter;
InitializeComponent();
}
private void Currency_det_Load(object sender, EventArgs e)
{
cb = new SqlCommandBuilder(dat);
myCurrencyManager = (CurrencyManager)this.BindingContext[dtt];
myCurrencyManager.Position = position;
txt_name.DataBindings.Add("Text", dtt , "Name");
txt_symbol.DataBindings.Add("Text", dtt, "Symbol");
txt_rate.DataBindings.Add("Text", dtt, "Rate");
txt_nation.DataBindings.Add("Text", dtt, "Country");
}
private void cmd_ext_Click(object sender, EventArgs e)
{
this.Close();
}
private void cmd_save_Click(object sender, EventArgs e)
{
dat.Update(dtt);
this.DialogResult = DialogResult.OK;
}
}
}
}
If I add/edit record directly from datagrid and call update method in form1 without call form2, It can successful update to grid.. But I don't want to make user to add/edit directly from datagrid, I want them to add/edit record on another form.. So am I missing something?

Andy Wij · Answer

@all : Thx for the reply mate, If only using acceptchanges() it still can't update so I combine it with datarow.BeginEdit() method.
I found it can work like this,
private void cmd_save_click(object sender, Eventargs e)
{
datarow dr = dtt.Rows[position];
dr.beginEdit();
dr["Name"] = txt_name.Text;
dr["Symbol"] = txt_symbol.Text;
dr["Rate"] = txt_rate.Text;
dr["Nation"] = txt_nation.Text;
dr.EndEdit();
dat.update(dtt);
dtt.AcceptChanges();
this.DialogResult = DialogResult.OK;
}

Satyapriya Nayak · Answer

Hi Andy,
Try this,
SqlCommandBuilder objcom;
DataRow dr;
private void cmd_save_Click(object sender, EventArgs e)
{
dr.BeginEdit();
dr["Name"] = txt_name.Text;
dr["Symbol"] = txt_symbol.Text;
dr["Rate"] = int.Parse(txt_rate.Text);
dr["Country"] = txt_nation.Text;
dr.EndEdit();
objcom = new SqlCommandBuilder(sqlda);
sqlda.Update(ds, "tablename");
sqlda.Fill(ds, "tablename");
this.DialogResult = DialogResult.OK;
}
Thanks

Prabhu Raja · Answer

Try this but i am not sure.
private void cmd_save_Click(object sender, EventArgs e)
{
dat.Update(dtt);
dtt.AcceptChanges();
this.DialogResult = DialogResult.OK;
}