简单数据库访问模型代码,CSharp代码库,德仔网

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【CSharp】简单数据库访问模型
作者:lbname2 / 发布于2013/9/2/ 527

	?using System;
	using System.Collections.Generic;
	using System.Text;

	namespace DynamicFramework
	{
	 public abstract class DataAccess : MarshalByRefObject
	 {
	 protected System.Data.Common.DbConnection connection;
	 protected string cnnstr = "";
	 protected DataAccess()
	 {
	 }

	 public static string ConnPath = System.Windows.Forms.Application.StartupPath + "\\LocalDB.mdb";
	 public static DataAccess LocalDb
	 {
	 get
	 {
	 return new OleAccess("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ConnPath);
	 //return new SqlClientAccess("Server=localhost;Trusted_Connection=true;Database=RestaurantDB");
	 }
	 }

	 public static DataAccess ServerDb
	 {
	 get
	 {
	 //return new OleAccess("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ConnPath);
	 //if (Configs.LocalConfig.Instanct.IsLocalServer)
	 //{
	
	 //}
	 //Trusted_Connection=true;
	 //return new SqlClientAccess("Server=.;Database=RestaurantDB,uid = sa,pwd =");

	 return new SqlClientAccess("Data Source=.;Initial Catalog=RestaurantDB;Persist Security Info=True;User ID=sa");
	 }
	 }

	 private System.Data.Common.DbCommand GetCommand(string sql, Dictionary<string, object> parameters)
	 {
	 System.Data.Common.DbCommand cmd = connection.CreateCommand();
	 cmd.CommandText = sql;
	 if (parameters != null)
	 {
	 foreach (KeyValuePair<string, object> item in parameters)
	 {
	 System.Data.Common.DbParameter parameter = cmd.CreateParameter();
	 parameter.ParameterName = item.Key;
	 parameter.Value = item.Value;
	 cmd.Parameters.Add(parameter);
	 }
	 }
	 return cmd;
	 }

	 #region DataAccess Command

	 public int ExcuteCommand(string sql,Dictionary<string,object> parameters)
	 {
	 using (connection)
	 {
	 connection.ConnectionString = cnnstr;
	 connection.Open();
	 return GetCommand(sql, parameters).ExecuteNonQuery();
	 }
	 }

	 public object ExecuteScalar(string sql, Dictionary<string, object> parameters)
	 {
	 using (connection)
	 {
	 connection.ConnectionString = cnnstr;
	 connection.Open();
	 return GetCommand(sql, parameters).ExecuteScalar();
	 }
	 }

	 public object ExecuteReader(string sql, Dictionary<string, object> parameters)
	 {
	 using (connection)
	 {
	 connection.ConnectionString = cnnstr;
	 connection.Open();
	 return GetCommand(sql, parameters).ExecuteReader();
	 }
	 }


	 public System.Data.DataTable ExecuteDataTable(string sql)
	 {
	 return ExecuteDataTable(sql, null);
	 }

	 public System.Data.DataTable ExecuteDataTable(string sql, Dictionary<string, object> parameters)
	 {
	 using (connection)
	 {
	 connection.ConnectionString = cnnstr;
	 connection.Open();
	 return DbHelper.ToTable(GetCommand(sql, parameters).ExecuteReader());
	 }
	 }

	 public List<T> ExcuteList<T>(string sql, Dictionary<string, object> parameters)
	 {
	 using (connection)
	 {
	 connection.ConnectionString = cnnstr;
	 connection.Open();
	 return DbHelper.ToList<T>(GetCommand(sql, parameters).ExecuteReader());
	 }
	 }

	 public T GetEntity<T>(string sql, Dictionary<string, object> parameters)
	 {
	 using (connection)
	 {
	 connection.ConnectionString = cnnstr;
	 connection.Open();
	 return DbHelper.ToEntity<T>(GetCommand(sql, parameters).ExecuteReader());
	 }
	 }

	 public List<T> ExcuteList<T>()
	 {
	 using (connection)
	 {
	 connection.ConnectionString = cnnstr;
	 connection.Open();
	 return DbHelper.ToList<T>(GetCommand(string.Format("select * from {0}", typeof(T).Name), null).ExecuteReader());
	 }
	 }

	 public System.Data.DataTable FillDataTable(string sql)
	 {
	 return FillDataTable(sql, null);
	 }

	 public System.Data.DataTable FillDataTable(string sql, Dictionary<string, object> parameters)
	 {
	 System.Data.DataTable dt = new System.Data.DataTable();
	 Fill(dt, GetCommand(sql, parameters));
	 return dt;
	 }

	 public int Fill(System.Data.DataTable dt, System.Data.Common.DbCommand cmd)
	 {
	 using (connection)
	 {
	 connection.ConnectionString = cnnstr;
	 connection.Open();
	 System.Data.Common.DbDataAdapter adapter = CreateAdapter();
	 adapter.SelectCommand = cmd;
	
	 return adapter.Fill(dt);
	 }
	 }
	 public int SaveDataTable(System.Data.DataTable dt)
	 {
	 return SaveDataTable(dt, dt.TableName);
	 }
	 public int SaveDataTable(System.Data.DataTable dt, string tableName)
	 {
	 return SaveTable(dt, "select * from " + tableName + " where 1 = 2");
	 }

	 public int SaveTable(System.Data.DataTable dt, string sql)
	 {
	 using (connection)
	 {
	 connection.ConnectionString = cnnstr;
	 connection.Open();
	 System.Data.Common.DbDataAdapter adapter = CreateAdapter();
	 adapter.SelectCommand = GetCommand(sql, null);
	 System.Data.Common.DbCommandBuilder cmdBuild = CreateCommandBuilder();
	 cmdBuild.DataAdapter = adapter;
	 cmdBuild.QuotePrefix = "[";
	 cmdBuild.QuoteSuffix = "]";
	 return adapter.Update(dt);
	 }
	 }

	 public int SaveDataSet(System.Data.DataSet ds)
	 {
	 using (connection)
	 {
	 connection.ConnectionString = cnnstr;
	 connection.Open();
	 int updates = 0;
	 foreach (System.Data.DataTable item in ds.Tables)
	 {
	 updates += SaveDataTable(item);
	 }
	 return updates;
	 }
	 }

	 #endregion

	 internal virtual System.Data.Common.DbDataAdapter CreateAdapter()
	 {
	 throw new System.ApplicationException("DbDataAdapter Can Not Created!");
	 }

	 public virtual System.Data.Common.DbCommandBuilder CreateCommandBuilder()
	 {
	 throw new System.ApplicationException("DbCommandBuilder Can Not Created!");
	 }

	
	 }
	}
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