base in my own experience.
Call the data from the database again after your statement. that should work.
If you use this:
protected void btnSave_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["ConStr"].ConnectionString.ToString());
SqlDataAdapter da = new SqlDataAdapter();
con.Open();
da.InsertCommand = new SqlCommand();
da.InsertCommand.Connection = con;
da.InsertCommand.CommandType = CommandType.Text;
da.InsertCommand.CommandText = "INSERT INTO [User] ([NAME]) VALUES (@NAME)";
da.InsertCommand.Parameters.AddWithValue("@NAME", txtName.Text);
da.InsertCommand.ExecuteNonQuery();
con.Close();
}
Try adding Some select command after it so logically speaking if you click the button save you will call again the data and now together with data just you inserted.
i hope it can help you. :)