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using System;
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using System.Collections.Generic;
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using Mesnac.Basic;
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using System.Text;
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using System.Windows.Forms;
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using ICSharpCode.Data.Core;
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using ICSharpCode.Data.Core.Common;
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using ICSharpCode.Data.Core.DatabaseDrivers.SQLServer;
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using ICSharpCode.Data.Core.Interfaces;
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using ICSharpCode.Data.Core.DatabaseObjects;
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using ICSharpCode.Data.Core.Enums;
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using ICSharpCode.Data.Core.Interfaces;
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namespace Mesnac.Gui.Edit.Common
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{
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public delegate void CallBackDelegate(); //回调方法
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/// <summary>
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/// 数据源工厂
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/// </summary>
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public class DataSourceFactory
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{
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private static DataSourceFactory instance = null; //保存工厂实例
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private Dictionary<string, DataSourceItem> _dataSources = null; //保存数据源
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private TreeNode root = null;
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public event EventHandler DataSourceRefresh;
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private DataSourceFactory()
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{
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this.root = new TreeNode();
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root.Text = "数据源列表";
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}
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/// <summary>
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/// 工厂实例
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/// </summary>
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public static DataSourceFactory Instance
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{
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get
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{
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if (instance == null)
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{
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instance = new DataSourceFactory();
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}
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return instance;
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}
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}
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/// <summary>
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/// 把内存中的数据源数据保存只文件
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/// </summary>
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/// <param name="fileName">要保存数据源信息的文件名</param>
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public void RefreshDataFromFile(string fileName, params CallBackDelegate[] callBack)
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{
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if (System.IO.File.Exists(fileName))
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{
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this._dataSources = XmlHandler.ParseFromDataSourceXml(fileName);
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//触发事件
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if (DataSourceRefresh != null)
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{
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DataSourceRefresh(this, EventArgs.Empty);
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}
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new System.Threading.Thread(new System.Threading.ThreadStart(delegate() { this.GenerateDataSourceTree(); foreach (CallBackDelegate call in callBack) { call(); } })).Start(); //异步生成数据源树
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}
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else
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{
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this._dataSources = new Dictionary<string, DataSourceItem>();
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}
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}
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/// <summary>
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/// 把文件中的内容读取至内存
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/// </summary>
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/// <param name="fileName">保存数据源信息的文件名</param>
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public void RefreshDataToFile(string fileName, params CallBackDelegate[] callBack)
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{
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if (this._dataSources != null)
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{
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XmlHandler.GenerateDataSourceXml(this._dataSources, fileName);
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new System.Threading.Thread(new System.Threading.ThreadStart(delegate() { this.GenerateDataSourceTree(); foreach (CallBackDelegate call in callBack) { call(); } })).Start(); //异步生成数据源树
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}
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}
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/// <summary>
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/// 数据源信息
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/// </summary>
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public Dictionary<string, DataSourceItem> DataSources
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{
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get
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{
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return this._dataSources;
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}
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}
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/// <summary>
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/// 数据源树
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/// </summary>
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public TreeNode Root
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{
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get { return this.root; }
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}
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/// <summary>
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/// 生成数据源树
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/// </summary>
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public void GenerateDataSourceTree()
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{
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lock (this)
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{
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this.root.Nodes.Clear();
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this.root = new TreeNode();
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this.root.Text = "数据源列表";
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if (this._dataSources != null)
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{
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TreeNode nodeDataSource = null;
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int cnt = 0;
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foreach (DataSourceItem dataSourceItem in this._dataSources.Values)
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{
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nodeDataSource = new TreeNode();
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nodeDataSource.Text = dataSourceItem.Name;
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nodeDataSource.ToolTipText = dataSourceItem.Driver;
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//string driverAssembly = dataSourceItem.DriverAssembly;
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//string driverClass = dataSourceItem.DriverClass;
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#region 数据源处理
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switch (dataSourceItem.Driver)
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{
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case "MS SQL Server":
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SQLServerDatabaseDriver driver = new SQLServerDatabaseDriver();
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SQLServerDatasource ds = new SQLServerDatasource(driver);
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ds.Name = dataSourceItem.Server;
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ds.UserId = dataSourceItem.UserName;
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ds.Password = dataSourceItem.Password;
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driver.PopulateDatabases(ds);
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IDatabase database = null;
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foreach (IDatabase db in ds.Databases)
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{
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if (db.ToString() == dataSourceItem.Database)
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{
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database = db;
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break;
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}
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}
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if (database != null)
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{
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database.LoadDatabase();
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TreeNode nodeTables = new TreeNode();
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nodeTables.Text = "数据表";
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TreeNode nodeTable = null;
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foreach (ITable table in database.Tables)
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{
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nodeTable = new TreeNode();
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nodeTable.Text = table.TableName;
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TreeNode nodeColumn = null;
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foreach (IColumn col in table.Items)
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{
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nodeColumn = new TreeNode();
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nodeColumn.Text = col.Name;
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nodeTable.Nodes.Add(nodeColumn);
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}
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nodeTables.Nodes.Add(nodeTable);
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}
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TreeNode nodeViews = new TreeNode();
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nodeViews.Text = "数据视图";
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TreeNode nodeView = null;
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foreach (IView view in database.Views)
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{
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nodeView = new TreeNode();
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nodeView.Text = view.Name;
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TreeNode nodeColumn = null;
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foreach (IColumn col in view.Items)
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{
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nodeColumn = new TreeNode();
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nodeColumn.Text = col.Name;
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nodeTable.Nodes.Add(nodeColumn);
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}
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nodeViews.Nodes.Add(nodeView);
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}
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TreeNode nodeProcedures = new TreeNode();
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nodeProcedures.Text = "存储过程";
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TreeNode nodeProcedure = null;
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foreach (IProcedure procedure in database.Procedures)
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{
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nodeProcedure = new TreeNode();
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nodeProcedure.Text = procedure.Name;
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nodeProcedures.Nodes.Add(nodeProcedure);
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}
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nodeDataSource.Nodes.Add(nodeTables);
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nodeDataSource.Nodes.Add(nodeViews);
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nodeDataSource.Nodes.Add(nodeProcedures);
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}
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break;
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default:
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break;
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}
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#endregion
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cnt++;
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if (cnt > this._dataSources.Values.Count) break;
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this.root.Nodes.Add(nodeDataSource);
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}
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}
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}
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}
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/// <summary>
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/// 添加数据源
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/// </summary>
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/// <param name="name"></param>
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/// <param name="item"></param>
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public void Add(string name, DataSourceItem item)
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{
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if (this._dataSources == null)
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{
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this._dataSources = new Dictionary<string, DataSourceItem>();
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}
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if (!this.IsExists(name))
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{
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this._dataSources.Add(name, item);
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//触发事件
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if (DataSourceRefresh != null)
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{
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DataSourceRefresh(this, EventArgs.Empty);
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}
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}
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}
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/// <summary>
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/// 移除数据源
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/// </summary>
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/// <param name="name"></param>
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public void Remove(string name)
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{
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if (this.IsExists(name))
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{
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this._dataSources.Remove(name);
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//触发事件
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if (DataSourceRefresh != null)
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{
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DataSourceRefresh(this, EventArgs.Empty);
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}
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}
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}
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/// <summary>
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/// 修改数据源
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/// </summary>
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/// <param name="name"></param>
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/// <param name="newItem"></param>
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public void Modify(string name, DataSourceItem newItem)
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{
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if (this._dataSources == null)
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{
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this._dataSources = new Dictionary<string, DataSourceItem>();
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}
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if (this.IsExists(name))
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{
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this._dataSources[name] = newItem;
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//触发事件
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if (DataSourceRefresh != null)
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{
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DataSourceRefresh(this, EventArgs.Empty);
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}
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}
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}
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/// <summary>
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/// 获取下一个可用的数据源名称
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/// </summary>
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/// <returns></returns>
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public string GetNextDataSourceName()
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{
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int i = 1;
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if (this._dataSources == null)
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{
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return "DataSource1";
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}
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else
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{
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while (this._dataSources.ContainsKey("DataSource" + i))
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{
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i++;
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}
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}
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return "DataSource" + i;
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}
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/// <summary>
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/// 判断指定名称的数据源是否存在
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/// </summary>
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/// <param name="dataSourceName">要判断的数据源名称</param>
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/// <returns>存在返回true，否则返回false</returns>
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public bool IsExists(string dataSourceName)
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{
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if (this._dataSources == null)
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{
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return false;
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}
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else
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{
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if (this._dataSources.ContainsKey(dataSourceName))
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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}
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}
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}
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