help on sql CE update

[zigzagooo]

the problem that my code does the update during the same run while iam out and run again i find nothing of the updates i think it's a comminting problem anyway hope anyone help me!! plz check the code:

public partial class Form1 : Form
{
static SqlCeConnection _connection = null;
public static SqlCeConnection Connection
{
get
{
if (_connection == null)
{
_connection = new SqlCeConnection(ConnectionString);
_connection.Open();
}
return _connection;
}
}
public Form1()
{
InitializeComponent();
}
public static DataSet ds = new DataSet();
public static int rowindex = -1;
private void menuExit_Click(object sender, EventArgs e)
{
Close();
}

    #region File & Database Details

   static string CurrentFolder
    {
        get { return Path.GetDirectoryName(Assembly.GetExecutingAssembly().GetName().CodeBase); }
    }

    const string \_databaseLocalFileName = "DB1.sdf";
   static string DatabasePathName
    {
        get { return Path.Combine(CurrentFolder, \_databaseLocalFileName); }
    }

    const string \_baseConnectionString = "Data Source =";
   static string ConnectionString
    {
        get { return \_baseConnectionString + DatabasePathName; }
    }

    #endregion

    private void menuedit\_Click(object sender, EventArgs e)
    {          
        rowindex = dataGrid1.CurrentRowIndex;
        if (dataGrid1.DataSource != null)
        {
            panel1.Visible = true;
            txtcol1.Text = ds.Tables\[0\].Rows\[rowindex\].ItemArray\[0\].ToString();
            txtcol2.Text = ds.Tables\[0\].Rows\[rowindex\].ItemArray\[1\].ToString();
            txttblID.Text = ds.Tables\[0\].Rows\[rowindex\].ItemArray\[2\].ToString();
        }
        else
            MessageBox.Show("should load data grid first", "error", MessageBoxButtons.OK, MessageBoxIcon.Hand, MessageBoxDefaultButton.Button1);
    }
    public static SqlCeDataAdapter adap;
    

    private void btnsave\_Click\_1(object sender, EventArgs e)
    {
        try
        {
            SqlCeCommand cmdUpdate = Connection.CreateCommand();
            SqlCeTransaction se = Connection.BeginTr