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数据库封装类DataOperation改进(支持事务、存储过程、简单使用例子)

2006-06-02 12:02 701 查看
今天对数据访问类进行了改进,支持存储过程、带参数的查询。虽然这种封装对于大型项目来说没有太大的好处,或者说没有什么意义,但是对于一些小小的项目或者自己写着玩的程序用这个类库还是比较节约代码的。至少使用起来很方便。将来有时间我打算把一个用于大型项目的数据库封装写上来。

1.参数集合类,用于添加参数元素。

using System.Collections;
using System.Data;
using System.Data.SqlClient;
using System.Data.Common;
using System;

namespace DataOperation
{
/// <summary>
/// SqlParameters是参数集合类,用于带参数、或存储过程操作数据库传递参数
/// </summary>
public class SqlParameters:CollectionBase
{
public SqlParameters()
{
}
/// <summary>
/// 向参数集合中添加参数元素
/// </summary>
/// <param name="sqlParameter">参数元素</param>
/// <returns>返回添加数据的位置</returns>
public int Add(SqlParameter sqlParameter)
{
return List.Add(sqlParameter);
}
/// <summary>
/// 从参数集合中指定的移出元素
/// </summary>
/// <param name="sqlParameter"></param>
public void Remove(SqlParameter sqlParameter)
{
List.Remove(sqlParameter);
}
/// <summary>
/// 索引
/// </summary>
public SqlParameter this[int index]
{
get
{
return (SqlParameter)List[index];
}
set
{
List[index]=value;
}
}
/// <summary>
/// 索引
/// </summary>
public SqlParameter this[string sqlParameterName]
{
get
{
SqlParameter sqlParameter;
foreach(object ob in List)
{
sqlParameter = (SqlParameter)ob;
if(sqlParameter.ParameterName==sqlParameterName)
{
return sqlParameter;
}
}
return null;
}
set
{
SqlParameter sqlParameter;
foreach(object ob in List)
{
sqlParameter = (SqlParameter)ob;
if(sqlParameter.ParameterName==sqlParameterName)
{
sqlParameter = value;
return;
}
}
}
}

}
}

2.数据库操作主类

using System;
using System.Collections;
using System.Data;
using System.Data.SqlClient;

namespace DataOperation
{
/// <summary>
/// MsSql操作类
/// </summary>
sealed public class DataMsSql
{
private SqlConnection dataConnection = null;
private SqlTransaction dbTransaction = null;

#region 构造函数
/// <summary>
/// 无参构造函数
/// </summary>
public DataMsSql()
{
dataConnection = new SqlConnection();
}
/// <summary>
/// 有参构造函数
/// </summary>
/// <param name="connectionString">数据库联接串</param>
public DataMsSql(string connectionString)
{
dataConnection = new SqlConnection(connectionString);
}
#endregion

#region 属性
/// <summary>
/// 设置或获取SqlConnection类型数据库联接dataConnection的值
/// </summary>
public SqlConnection DataConnection
{
get
{
if (dataConnection == null)
dataConnection = new SqlConnection();
return dataConnection;
}
set
{
dataConnection = value;
}
}
/// <summary>
/// 获取数据库联接的状态
/// </summary>
public ConnectionState SqlState
{
get
{
return dataConnection.State;
}
}
#endregion

#region 状态操作
/// <summary>
/// 打开数据库联接
/// </summary>
public void Open()
{
if (dataConnection.State != ConnectionState.Open)
dataConnection.Open();
}
/// <summary>
/// 关闭数据库联接
/// </summary>
public void Close()
{
if (dataConnection.State != ConnectionState.Closed)
dataConnection.Close();
}
#endregion

#region 一般数据语句操作
/// <summary>
/// 获取检索出来首行首列的值
/// </summary>
/// <param name="sqlStr">sql查询串</param>
/// <returns>结果</returns>
public object ExecuteScalar(string sqlStr,SqlParameters sqlParameters)
{
if (SqlState == ConnectionState.Closed)
this.Open();
SqlCommand cmd = new SqlCommand(sqlStr, dataConnection);
AddParameters(cmd,sqlParameters);
return cmd.ExecuteScalar();
}
public object ExecuteScalar(string sqlStr)
{
return ExecuteScalar(sqlStr,null);
}
/// <summary>
///检索数据以SqlDataReader形式返检索结果
/// </summary>
/// <param name="sqlStr">sql查询串</param>
/// <returns>SqlDataReader数据集</returns>
public SqlDataReader GetDataReader(string sqlStr,SqlParameters sqlParameters)
{
if (SqlState == ConnectionState.Closed)
this.Open();
SqlCommand cmd = new SqlCommand(sqlStr, dataConnection);
AddParameters(cmd,sqlParameters);
return cmd.ExecuteReader();
}
public SqlDataReader GetDataReader(string sqlStr)
{
return GetDataReader(sqlStr,null);
}
/// <summary>
/// 检索数据以DataTable形式返检索结果
/// </summary>
/// <param name="sqlStr">sql查询串</param>
/// <returns>DataTale数据集</returns>
public DataTable GetDataTable(string sqlStr,SqlParameters sqlParameters)
{
DataTable dt = new DataTable();
SqlCommand cmd = new SqlCommand(sqlStr, dataConnection);
AddParameters(cmd,sqlParameters);
SqlDataAdapter adapter = new SqlDataAdapter(cmd);
adapter.Fill(dt);
return dt;
}
public DataTable GetDataTable(string sqlStr)
{
return GetDataTable(sqlStr,null);
}
/// <summary>
/// 执行出检索以外的其它数据操作返回影响条数
/// </summary>
/// <param name="sqlStr">sql操作语句</param>
/// <returns> 操作影响条数</returns>
public int ExecuteSql(String sqlStr,SqlParameters sqlParameters)
{
if (SqlState == ConnectionState.Closed)
this.Open();
SqlCommand cmd = new SqlCommand(sqlStr, DataConnection);
AddParameters(cmd,sqlParameters);
return cmd.ExecuteNonQuery();
}
public int ExecuteSql(String sqlStr)
{
return ExecuteSql(sqlStr,null);
}
#endregion

#region 存储过程操作
/// <summary>
/// 执行存储过程获得DataTable数据
/// </summary>
/// <param name="storedProcedureName">存储过程名称</param>
/// <returns>DataTable形式的结果集</returns>
public DataTable StoredProcGetDataTable(string storedProcedureName)
{
return StoredProcGetDataTable(storedProcedureName,null);
}
/// <summary>
/// 执行存储过程获得DataTable数据
/// </summary>
/// <param name="sqlParameters">存储过程参数ArrayList类型的SqlParameter集合</param>
/// <param name="storedProcedureName">存储过程名称</param>
/// <returns>DataTable形式的结果集</returns>
public DataTable StoredProcGetDataTable(string storedProcedureName,SqlParameters sqlParameters)
{
SqlCommand cmd = new SqlCommand();
cmd.Connection = dataConnection;
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = storedProcedureName;
AddParameters(cmd,sqlParameters);
SqlDataAdapter dataAdapter = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
dataAdapter.Fill(dt);
return dt;
}
/// <summary>
/// 执行存储过程返回影响条数
/// </summary>
/// <param name="storedProcedureName">存储过程名称</param>
/// <returns>影响条数</returns>
public int StoredProcExecute(string storedProcedureName)
{
return StoredProcExecute(storedProcedureName,null);
}
/// <summary>
/// 执行存储过程返回影响条数
/// </summary>
/// <param name="sqlParameters">存储过程参数ArrayList类型的SqlParameter集合</param>
/// <param name="storedProcedureName">存储过程名称</param>
/// <returns>影响条数</returns>
public int StoredProcExecute(string storedProcedureName,SqlParameters sqlParameters)
{
SqlCommand cmd = new SqlCommand();
cmd.Connection = dataConnection;
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = storedProcedureName;
AddParameters(cmd,sqlParameters);
return cmd.ExecuteNonQuery();
}
/// <summary>
/// 执行存储过程获得数据并以SqlDataReader返回结果
/// </summary>
/// <param name="storedProcedureName">存储过程名称</param>
/// <returns>SqlDataReader形式的结果集</returns>
public SqlDataReader StoredProcGetDataReader(string storedProcedureName)
{
return StoredProcGetDataReader(storedProcedureName,null);
}
/// <summary>
/// 执行存储过程获得数据并以SqlDataReader返回结果
/// </summary>
/// <param name="sqlParameters">存储过程参数ArrayList类型的SqlParameter集合</param>
/// <param name="storedProcedureName">存储过程名称</param>
/// <returns>SqlDataReader形式的结果集</returns>
public SqlDataReader StoredProcGetDataReader(string storedProcedureName,SqlParameters sqlParameters)
{
SqlCommand cmd = new SqlCommand();
cmd.Connection = dataConnection;
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = storedProcedureName;
AddParameters(cmd,sqlParameters);
return cmd.ExecuteReader();
}
/// <summary>
/// 执行存储过程获得数据并返回首行首列
/// </summary>
/// <param name="storedProcedureName">存储过程名称</param>
/// <returns>返回首行首列</returns>
public object StoredProcExecuteScalar(string storedProcedureName)
{
return StoredProcExecuteScalar(storedProcedureName,null);
}
/// <summary>
/// 执行存储过程获得数据并返回首行首列
/// </summary>
/// <param name="sqlParameters">存储过程参数ArrayList类型的SqlParameter集合</param>
/// <param name="storedProcedureName">存储过程名称</param>
/// <returns>返回首行首列</returns>
public object StoredProcExecuteScalar(string storedProcedureName,SqlParameters sqlParameters)
{
SqlCommand cmd = new SqlCommand();
cmd.Connection = dataConnection;
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = storedProcedureName;
AddParameters(cmd,sqlParameters);
return cmd.ExecuteScalar();
}
#endregion

#region 事务操作
/// <summary>
/// 开启事务
/// </summary>
public void BeginTransaction()
{
dbTransaction = dataConnection.BeginTransaction();
}
/// <summary>
/// 提交事务
/// </summary>
public void Commit()
{
dbTransaction.Commit();
}
/// <summary>
/// 回滚事务
/// </summary>
public void Rollback()
{
dbTransaction.Rollback();
}
#endregion
private void AddParameters(SqlCommand cmd,SqlParameters sqlParameters)
{
if (null!=sqlParameters && 0!=sqlParameters.Count)
foreach (SqlParameter parameter in sqlParameters)
{
cmd.Parameters.Add(parameter);
}
}

}
}

下面举一个使用的简单例子:

//实例化一个操作类
DataOperation.DataMsSql dms = new DataOperation.DataMsSql("Server=.;database=XJSXM;uid=XJSXM;pwd=XJSXM");
//sql语句
string sqlCommand = "select * from tblBZWD where ZDBH=@zdbh";
//参数集合
DataOperation.SqlParameters sqlParas = new DataOperation.SqlParameters();
//添加一个参数
sqlParas.Add(new System.Data.SqlClient.SqlParameter("@zdbh",254));
DataTable dt = dms.GetDataTable(sqlCommand,sqlParas);
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