GtkSharp/sample/DbClient/client.cs

549 lines
14 KiB
C#
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using System;
using System.Collections;
using System.Drawing;
using System.Data;
using System.Data.SqlClient;
using Gtk;
using GtkSharp;
enum DialogType
{
Insert,
Delete,
Update
}
class Client {
static Window window;
static Dialog dialog;
static Toolbar toolbar;
static Table tableau;
static Entry id_entry;
static Entry name_entry;
static Entry address_entry;
static Statusbar status;
static Stack statusIds;
static VBox box;
static IdConnection conn;
static bool noConn;
static void Main ()
{
Application.Init ();
window = new Window ("Database client");
window.DeleteEvent += new DeleteEventHandler (Window_Delete);
window.DefaultSize = new Size (300, 200);
box = new VBox (false, 0);
window.Add (box);
box.PackStart (CreateMenu (), false, false, 0);
toolbar = new Toolbar ();
PackToolbar ();
box.PackStart (toolbar, false, false, 0);
UpdateView ();
status = new Statusbar ();
box.PackEnd (status, false, false, 0);
window.ShowAll ();
Application.Run ();
}
static uint context_id = 0;
static void PushMessage (string message)
{
if (statusIds == null)
statusIds = new Stack ();
if (status != null)
statusIds.Push (status.Push (context_id++, message));
}
static void PopMessage ()
{
if (statusIds == null || statusIds.Count == 0)
return;
status.Pop ((uint) statusIds.Pop ());
}
static void PackToolbar ()
{
toolbar.AppendItem ("Insert", "Insert a row", String.Empty,
new Gtk.Image (Stock.Add, IconSize.LargeToolbar),
new SignalFunc (Db_Insert), IntPtr.Zero);
toolbar.AppendItem ("Remove", "Remove a row", String.Empty,
new Gtk.Image (Stock.Remove, IconSize.LargeToolbar),
new SignalFunc (Db_Remove), IntPtr.Zero);
toolbar.AppendItem ("Update", "Update a row", String.Empty,
new Gtk.Image (Stock.Italic, IconSize.LargeToolbar),
new SignalFunc (Db_Update), IntPtr.Zero);
toolbar.AppendItem ("Refresh", "Refresh the view", String.Empty,
new Gtk.Image (Stock.Refresh, IconSize.LargeToolbar),
new SignalFunc (UpdateView), IntPtr.Zero);
toolbar.AppendSpace ();
toolbar.InsertStock (Stock.Quit, "Quit", String.Empty,
new SignalFunc (Quit), IntPtr.Zero, -1);
toolbar.ToolbarStyle = ToolbarStyle.BothHoriz;
}
static void Window_Delete (object o, DeleteEventArgs args)
{
Application.Quit ();
args.RetVal = true;
}
static void UpdateView ()
{
if (tableau != null)
tableau.Destroy ();
PopMessage ();
PushMessage ("");
ArrayList dataList = null;
try {
dataList = Conn.SelectAll ();
} catch (Exception e) {
Console.WriteLine ("Error accesing DB.\n");
Console.WriteLine (e.Message);
Console.Write ("\nYou should set up a PostgreSQL database for user 'monotest', ");
Console.Write ("password\n'monotest' and dbname 'monotest' accesible ");
Console.WriteLine ("through the loopback interface.\n");
Console.WriteLine ("The database should have a table called customers " +
"created with the following\ncommand:\n");
Console.WriteLine ("CREATE TABLE \"customers\" (");
Console.WriteLine ("\t\"id\" integer NOT NULL,");
Console.WriteLine ("\t\"name\" character varying(256) NOT NULL,");
Console.WriteLine ("\t\"address\" character varying(256) NOT NULL");
Console.WriteLine (");\n");
Console.WriteLine ("CREATE UNIQUE INDEX id_idx ON customers USING btree (id);\n");
Environment.Exit (1);
}
tableau = new Gtk.Table ((uint) dataList.Count + 1, 3, false);
DrawTitles (tableau);
tableau.ColSpacings = 10;
uint i = 1;
foreach (Record r in dataList) {
tableau.Attach (new Label (r.ID.ToString ()), 0, 1, i, i + 1);
tableau.Attach (new Label (r.Name), 1, 2, i, i + 1);
tableau.Attach (new Label (r.Address), 2, 3, i, i + 1);
i++;
}
tableau.Show ();
box.PackStart (tableau, false, false, 0);
box.ShowAll ();
}
static void DrawTitles (Gtk.Table t)
{
Label label = null;
label = new Label (String.Empty);
label.Markup = "<big><b>ID</b></big>";
label.UseMarkup = true;
t.Attach (label, 0, 1, 0, 1);
label = new Label (String.Empty);
label.Markup = "<big><b>Name</b></big>";
label.UseMarkup = true;
t.Attach (label, 1, 2, 0, 1);
label = new Label (String.Empty);
label.Markup = "<big><b>Address</b></big>";
label.UseMarkup = true;
t.Attach (label, 2, 3, 0, 1);
}
static void Db_Insert ()
{
if (dialog != null) {
return;
}
dialog = new Dialog ();
dialog.Title = "Insert row";
dialog.BorderWidth = 3;
dialog.VBox.BorderWidth = 5;
dialog.HasSeparator = false;
Frame frame = new Frame ("Insert a row");
frame.Add (MakeDialog (Stock.DialogInfo, DialogType.Insert));
dialog.VBox.PackStart (frame, true, true, 0);
Button button = null;
button = Button.NewFromStock (Stock.Add);
button.Clicked += new EventHandler (Insert_Action);
button.CanDefault = true;
dialog.ActionArea.PackStart (button, true, true, 0);
button.GrabDefault ();
button = Button.NewFromStock (Stock.Cancel);
button.Clicked += new EventHandler (Dialog_Cancel);
dialog.ActionArea.PackStart (button, true, true, 0);
dialog.Modal = true;
dialog.ShowAll ();
}
static void Db_Remove ()
{
if (dialog != null) {
return;
}
dialog = new Dialog ();
dialog.Title = "Remove row";
dialog.BorderWidth = 3;
dialog.VBox.BorderWidth = 5;
dialog.HasSeparator = false;
Frame frame = new Frame ("Remove a row");
frame.Add (MakeDialog (Stock.DialogWarning, DialogType.Delete));
dialog.VBox.PackStart (frame, true, true, 0);
Button button = null;
button = Button.NewFromStock (Stock.Remove);
button.Clicked += new EventHandler (Remove_Action);
button.CanDefault = true;
dialog.ActionArea.PackStart (button, true, true, 0);
button.GrabDefault ();
button = Button.NewFromStock (Stock.Cancel);
button.Clicked += new EventHandler (Dialog_Cancel);
dialog.ActionArea.PackStart (button, true, true, 0);
dialog.ShowAll ();
}
static Widget MakeDialog (string image, DialogType type)
{
HBox hbox = new HBox (false, 2);
hbox.BorderWidth = 5;
hbox.PackStart (new Gtk.Image (image, IconSize.Dialog), true, true, 0);
Table table = new Table (3, 3, false);
hbox.PackStart (table);
table.ColSpacings = 4;
table.RowSpacings = 4;
Label label = null;
label = Label.NewWithMnemonic ("_ID");
table.Attach (label, 0, 1, 0, 1);
id_entry = new Entry ();
table.Attach (id_entry, 1, 2, 0, 1);
label = Label.NewWithMnemonic ("_Name");
table.Attach (label, 0, 1, 1, 2);
name_entry = new Entry ();
if (type == DialogType.Delete)
name_entry.Sensitive = false;
table.Attach (name_entry, 1, 2, 1, 2);
label = Label.NewWithMnemonic ("_Address");
table.Attach (label, 0, 1, 2, 3);
address_entry = new Entry ();
if (type == DialogType.Delete)
address_entry.Sensitive = false;
table.Attach (address_entry, 1, 2, 2, 3);
return hbox ;
}
static void Db_Update ()
{
if (dialog != null) {
return;
}
dialog = new Dialog ();
dialog.Title = "Update row";
dialog.BorderWidth = 3;
dialog.VBox.BorderWidth = 5;
dialog.HasSeparator = false;
Frame frame = new Frame ("Update row");
frame.Add (MakeDialog (Stock.DialogWarning, DialogType.Update));
dialog.VBox.PackStart (frame, true, true, 0);
Button button = null;
button = Button.NewFromStock (Stock.Apply);
button.Clicked += new EventHandler (Update_Action);
button.CanDefault = true;
dialog.ActionArea.PackStart (button, true, true, 0);
button.GrabDefault ();
button = Button.NewFromStock (Stock.Cancel);
button.Clicked += new EventHandler (Dialog_Cancel);
dialog.ActionArea.PackStart (button, true, true, 0);
dialog.ShowAll ();
}
static void Quit ()
{
Application.Quit ();
}
static void Insert_Action (object o, EventArgs args)
{
try {
Conn.Insert (UInt32.Parse (id_entry.Text), name_entry.Text, address_entry.Text);
UpdateView ();
} catch (Exception e) {
PushMessage (e.Message);
}
dialog.Destroy ();
dialog = null;
}
static void Remove_Action (object o, EventArgs args)
{
try {
Conn.Delete (UInt32.Parse (id_entry.Text));
UpdateView ();
} catch (Exception e) {
PushMessage (e.Message);
}
dialog.Destroy ();
dialog = null;
}
static void Update_Action (object o, EventArgs args)
{
try {
Conn.Update (UInt32.Parse (id_entry.Text), name_entry.Text, address_entry.Text);
UpdateView ();
} catch (Exception e) {
PushMessage (e.Message);
}
dialog.Destroy ();
dialog = null;
}
static void Dialog_Cancel (object o, EventArgs args)
{
dialog.Destroy ();
dialog = null;
}
static Gtk.MenuBar CreateMenu ()
{
MenuBar mb = new MenuBar ();
Menu file_menu = new Menu ();
ImageMenuItem quit_item = new ImageMenuItem ("Quit");
quit_item.Image = new Gtk.Image (Stock.Quit, IconSize.Menu);
quit_item.Activated += new EventHandler (Quit_Activated);
file_menu.Append (new SeparatorMenuItem ());
file_menu.Append (quit_item);
MenuItem file_item = new MenuItem ("_File");
file_item.Submenu = file_menu;
mb.Append (file_item);
Menu action_menu = new Menu ();
MenuItem action_item = new MenuItem ("_Action");
action_item.Submenu = action_menu;
mb.Append (action_item);
ImageMenuItem insert_item = new ImageMenuItem ("Insert");
insert_item.Image = new Gtk.Image (Stock.Add, IconSize.Menu);
insert_item.Activated += new EventHandler (Insert_Activated);
action_menu.Append (insert_item);
ImageMenuItem remove_item = new ImageMenuItem ("Remove");
remove_item.Image = new Gtk.Image (Stock.Remove, IconSize.Menu);
remove_item.Activated += new EventHandler (Remove_Activated);
action_menu.Append (remove_item);
ImageMenuItem update_item = new ImageMenuItem ("Update");
update_item.Image = new Gtk.Image (Stock.Italic, IconSize.Menu);
update_item.Activated += new EventHandler (Update_Activated);
action_menu.Append (update_item);
Menu help_menu = new Menu ();
MenuItem help_item = new MenuItem ("_Help");
help_item.Submenu = help_menu;
MenuItem about = new MenuItem ("About");
about.Activated += new EventHandler (About_Box);
help_menu.Append (about);
mb.Append (help_item);
return mb;
}
static void Insert_Activated (object o, EventArgs args)
{
Db_Insert ();
}
static void Remove_Activated (object o, EventArgs args)
{
Db_Remove ();
}
static void Update_Activated (object o, EventArgs args)
{
Db_Update ();
}
static void Quit_Activated (object o, EventArgs args)
{
Application.Quit ();
}
static void About_Box (object o, EventArgs args)
{
string [] authors = new string [] {
"Gonzalo Paniagua (gonzalo@ximian.com)",
"Duncan Mak (duncan@ximian.com)",
};
string [] documenters = new string [] {};
Gnome.About about = new Gnome.About ("Database Client", "0.1",
"Copyright (C) 2002, Ximian Inc.",
"A Sample Database client",
authors, documenters, "", new Gdk.Pixbuf ());
about.Show ();
}
static IdConnection Conn
{
get {
if (conn == null)
conn = new IdConnection ();
return conn;
}
}
}
struct Record {
public uint ID;
public string Name;
public string Address;
public Record (uint i, string s, string t)
{
ID = i;
Name = s;
Address = t;
}
}
class IdConnection : IDisposable
{
private SqlConnection cnc;
private bool disposed;
public IdConnection ()
{
cnc = new SqlConnection ();
string connectionString = "hostaddr=127.0.0.1;" +
"user=monotest;" +
"password=monotest;" +
"dbname=monotest";
cnc.ConnectionString = connectionString;
try {
cnc.Open ();
} catch (Exception){
cnc = null;
throw;
}
}
public void Insert (uint id, string name, string address)
{
string insertCmd = String.Format ("INSERT INTO customers VALUES ({0}, '{1}', '{2}')",
id, name.Trim (), address.Trim ());
IDbCommand insertCommand = cnc.CreateCommand();
insertCommand.CommandText = insertCmd;
insertCommand.ExecuteNonQuery ();
}
public void Delete (uint id)
{
string deleteCmd = String.Format ("DELETE FROM customers WHERE id = {0}", id);
IDbCommand deleteCommand = cnc.CreateCommand();
deleteCommand.CommandText = deleteCmd;
deleteCommand.ExecuteNonQuery ();
}
public bool Update (uint id, string name, string address)
{
string updateCmd = String.Format ("UPDATE customers SET name = '{1}', address = '{2}' WHERE id = {0}",
id, name.Trim (), address.Trim ());
IDbCommand updateCommand = cnc.CreateCommand();
updateCommand.CommandText = updateCmd;
bool updated = false;
return (updateCommand.ExecuteNonQuery () != 0);
}
public ArrayList SelectAll ()
{
IDbCommand selectCommand = cnc.CreateCommand();
string selectCmd = "SELECT id, name, address FROM customers ORDER by id";
selectCommand.CommandText = selectCmd;
IDataReader reader = selectCommand.ExecuteReader ();
return FillDataList (reader);
}
public Record Select (uint id)
{
IDbCommand selectCommand = cnc.CreateCommand();
string selectCmd = "SELECT id, name, address FROM customers WHERE id = " + id;
selectCommand.CommandText = selectCmd;
IDataReader reader = selectCommand.ExecuteReader ();
ArrayList list = FillDataList (reader);
return (Record) list [0];
}
private ArrayList FillDataList (IDataReader reader)
{
ArrayList list = new ArrayList ();
while (reader.Read ()) {
Record data = new Record (UInt32.Parse (reader.GetValue (0).ToString ()),
(string) reader.GetValue (1),
(string) reader.GetValue (2));
list.Add (data);
}
return list;
}
protected virtual void Dispose (bool exp)
{
if (!disposed && cnc != null) {
disposed = true;
try {
cnc.Close ();
} catch (Exception) {
}
cnc = null;
}
}
public void Dispose ()
{
Dispose (true);
GC.SuppressFinalize (this);
}
~IdConnection ()
{
Dispose (false);
}
}