using System;
using System.Data;
using System.Data.SqlClient;
namespace com.hua..li
{
/// <summary>
/// 数据库操作
/// </summary>
public class pathDB:pathPage
{
override protected void OnInit(EventArgs e)
{
pathInit();
base.OnInit(e);
}
protected void pathInit()
{
this.ConnectDb();
}
protected void ConnectDb()
{
if(doh == null)
{
System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["connString"]);
doh = new com.path.SqlDbOperHandler(conn);
}
}
}
}
using System;
namespace com.hua.li
{
/// <summary>
/// 表示数据库连接类型。
/// </summary>
public enum DatabaseType:byte{SqlServer,OleDb};
/// <summary>
/// DbOperHandler 的摘要说明。
/// </summary>
public abstract class DbOperHandler
{
/// <summary>
/// 析构函数,释放申请的资源。
/// </summary>
~DbOperHandler()
{
conn.Close();
}
/// <summary>
/// 表示数据库连接的类型,目前支持SqlServer和OLEDB
/// </summary>
protected DatabaseType dbType=DatabaseType.OleDb;
/// <summary>
/// 返回当前使用的数据库连接对象。
/// </summary>
/// <returns></returns>
public System.Data.IDbConnection GetConnection()
{
return conn;
}
/// <summary>
/// 条件表达式,用于在数据库操作时筛选记录,通常用于仅需指定表名称和某列名称的操作,如GetValue(),Delete()等,支持查询参数,由AddConditionParameters指定。。
/// </summary>
public string ConditionExpress=string.Empty;
/// <summary>
/// 当前的SQL语句。
/// </summary>
public string SqlCmd=string.Empty;
/// <summary>
/// 当前操作所涉及的数据表名称。
/// </summary>
protected string tableName=string.Empty;
/// <summary>
/// 当前操作所设计的字段名称。
/// </summary>
protected string fieldName=string.Empty;
/// <summary>
/// 当前所使用的数据库连接。
/// </summary>
protected System.Data.IDbConnection conn;
/// <summary>
/// 当前所使用的命令对象。
/// </summary>
protected System.Data.IDbCommand cmd;
/// <summary>
/// 当前所使用的数据库适配器。
/// </summary>
protected System.Data.IDbDataAdapter da;
/// <summary>
/// 用于存储字段/值配对。
/// </summary>
protected System.Collections.ArrayList alFieldItems=new System.Collections.ArrayList(10);
/// <summary>
/// 用于存储SQL语句中的查询参数。
/// </summary>
protected System.Collections.ArrayList alSqlCmdParameters=new System.Collections.ArrayList(5);
/// <summary>
/// 用于存储条件表达式中的查询参数。
/// </summary>
protected System.Collections.ArrayList alConditionParameters=new System.Collections.ArrayList(5);
/// <summary>
/// 重值该对象,使之恢复到构造时的状态。
/// </summary>
public void Reset()
{
this.alFieldItems.Clear();
this.alSqlCmdParameters.Clear();
this.alConditionParameters.Clear();
this.ConditionExpress=string.Empty;
this.SqlCmd=string.Empty;
this.cmd.Parameters.Clear();
this.cmd.CommandText=string.Empty;
}
/// <summary>
/// 添加一个字段/值对到数组中。
/// </summary>
/// <param name="_fieldName">字段名称。</param>
/// <param name="_fieldValue">字段值。</param>
public void AddFieldItem(string _fieldName,object _fieldValue)
{
for(int i=0;i<this.alFieldItems.Count;i++)
{
if(((DbKeyItem)this.alFieldItems[i]).fieldName==_fieldName)
{
throw new ArgumentException("The field name has existed!");
}
}
this.alFieldItems.Add(new DbKeyItem(_fieldName,_fieldValue));
}
/// <summary>
/// 添加条件表达式中的查询参数到数组中。注意:当数据库连接为SqlServer时,参数名称必须和SQL语句匹配。其它则只需保持添加顺序一致,名称无需匹配。
/// </summary>
/// <param name="_conditionName">条件名称。</param>
/// <param name="_conditionValue">条件值。</param>
public void AddConditionParameter(string _conditionName,object _conditionValue)
{
for(int i=0;i<this.alConditionParameters.Count;i++)
{
if(((DbKeyItem)this.alConditionParameters[i]).fieldName==_conditionName)
{
throw new ArgumentException("The condition name has existed!");
}
}
this.alConditionParameters.Add(new DbKeyItem(_conditionName,_conditionValue));
}
/// <summary>
/// 添加SQL语句中的查询参数到数组中。注意:当数据库连接为SqlServer时,参数名称必须和SQL语句匹配。其它则只需保持添加顺序一致,名称无需匹配。
/// </summary>
/// <param name="_paraName">参数名称。</param>
/// <param name="_paraValue">参数值。</param>
public void AddSqlCmdParameters(string _paraName,object _paraValue)
{
for(int i=0;i<this.alSqlCmdParameters.Count;i++)
{
if(((DbKeyItem)this.alSqlCmdParameters[i]).fieldName==_paraName)
{
throw new ArgumentException("The sqlcmd parameter name has existed!");
}
}
this.alSqlCmdParameters.Add(new DbKeyItem(_paraName,_paraValue));
}
public bool Exist(string tableName)
{
return this.GetValue(tableName,"count(*)").ToString()!="0";
}
/// <summary>
/// 抽象函数。用于产生Command对象所需的参数。
/// </summary>
protected abstract void GenParameters();
/// <summary>
/// 根据当前alFieldItem数组中存储的字段/值向指定表中添加一条数据。在该表无触发器的情况下返回添加数据所获得的自动增长id值。
/// </summary>
/// <param name="_tableName">要插入数据的表名称。</param>
/// <returns>返回本数据连接上产生的最后一个自动增长id值。</returns>
public int Insert(string _tableName)
{
this.tableName=_tableName;
this.fieldName=string.Empty;
this.SqlCmd="insert into "+this.tableName+"(";
string tempValues=" values(";
for(int i=0;i<this.alFieldItems.Count-1;i++)
{
this.SqlCmd+=((DbKeyItem)alFieldItems[i]).fieldName;
this.SqlCmd+=",";
tempValues+="@para";
tempValues+=i.ToString();
tempValues+=",";
}
this.SqlCmd+=((DbKeyItem)alFieldItems[alFieldItems.Count-1]).fieldName;
this.SqlCmd+=") ";
tempValues+="@para";
tempValues+=(alFieldItems.Count-1).ToString();
tempValues+=")";
this.SqlCmd+=tempValues;
this.cmd.CommandText=this.SqlCmd;
this.GenParameters();
cmd.ExecuteNonQuery();
cmd.CommandText="select @@identity as id";
int autoId=Convert.ToInt32(cmd.ExecuteScalar());
return autoId;
}
/// <summary>
/// 根据当前alFieldItem数组中存储的字段/值和条件表达式所指定的条件来更新数据库中的记录,返回所影响的行数。
/// </summary>
/// <param name="_tableName">要更新的数据表名称。</param>
/// <returns>返回此次操作所影响的数据行数。</returns>
public int Update(string _tableName)
{
this.tableName=_tableName;
this.fieldName=string.Empty;
this.SqlCmd="update "+this.tableName+" set ";
for(int i=0;i<this.alFieldItems.Count-1;i++)
{
this.SqlCmd+=((DbKeyItem)alFieldItems[i]).fieldName;
this.SqlCmd+="=";
this.SqlCmd+="@para";
this.SqlCmd+=i.ToString();
this.SqlCmd+=",";
}
this.SqlCmd+=((DbKeyItem)alFieldItems[alFieldItems.Count-1]).fieldName;
this.SqlCmd+="=";
this.SqlCmd+="@para";
this.SqlCmd+=(alFieldItems.Count-1).ToString();
if(this.ConditionExpress!=string.Empty)
{
this.SqlCmd=this.SqlCmd+" where "+this.ConditionExpress;
}
this.cmd.CommandText=this.SqlCmd;
this.GenParameters();
int effectedLines=this.cmd.ExecuteNonQuery();
return effectedLines;
}
/// <summary>
/// 执行SqlCmd中的SQL语句,参数由AddSqlCmdParameters指定,与ConditionExpress无关。
/// </summary>
/// <returns>返回此次操作所影响的数据行数。</returns>
public int ExecuteSqlNonQuery()
{
this.cmd.CommandText=this.SqlCmd;
this.GenParameters();
return cmd.ExecuteNonQuery();
}
/// <summary>
/// 获取指定表,指定列,指定条件的第一个符合条件的值。
/// </summary>
/// <param name="_tableName">表名称。</param>
/// <param name="_fieldName">字段名称。</param>
/// <returns>获取的值。如果为空则返回null。</returns>
public object GetValue(string _tableName,string _fieldName)
{
this.tableName=_tableName;
this.fieldName=_fieldName;
this.SqlCmd="select "+this.fieldName+" from "+this.tableName;
if(this.ConditionExpress!=string.Empty)
{
this.SqlCmd=this.SqlCmd+" where "+this.ConditionExpress;
}
this.cmd.CommandText=this.SqlCmd;
this.GenParameters();
return cmd.ExecuteScalar();
}
/// <summary>
/// 根据当前指定的SqlCmd获取DataTable。如果ConditionExpress不为空则会将其清空,所以条件表达式需要包含在SqlCmd中。
/// </summary>
/// <returns>返回查询结果DataTable。</returns>
public System.Data.DataTable GetDataTable()
{
System.Data.DataSet ds=this.GetDataSet();
return ds.Tables[0];
}
/// <summary>
/// 根据当前指定的SqlCmd获取DataSet。如果ConditionExpress不为空则会将其清空,所以条件表达式需要包含在SqlCmd中。
/// </summary>
/// <returns>返回查询结果DataSet。</returns>
public System.Data.DataSet GetDataSet()
{
this.alConditionParameters.Clear();
this.ConditionExpress=string.Empty;
this.cmd.CommandText=this.SqlCmd;
this.GenParameters();
System.Data.DataSet ds=new System.Data.DataSet();
this.da.SelectCommand=this.cmd;
this.da.Fill(ds);
return ds;
}
/// <summary>
/// 对指定表,指定字段执行加一计数,返回计数后的值。条件由ConditionExpress指定。
/// </summary>
/// <param name="_tableName">表名称。</param>
/// <param name="_fieldName">字段名称。</param>
/// <returns>返回计数后的值。</returns>
public int Count(string _tableName,string _fieldName)
{
this.tableName=_tableName;
this.fieldName=_fieldName;
int count=Convert.ToInt32(this.GetValue(this.tableName,this.fieldName));
count++;
this.cmd.Parameters.Clear();
this.cmd.CommandText=string.Empty;
this.AddFieldItem(_fieldName,count);
this.Update(this.tableName);
return count;
}
/// <summary>
/// 对指定表,指定字段执行减一计数,返回计数后的值。条件由ConditionExpress指定。
/// </summary>
/// <param name="_tableName">表名称。</param>
/// <param name="_fieldName">字段名称。</param>
/// <returns>返回计数后的值。</returns>
public int Substract(string _tableName,string _fieldName)
{
this.tableName=_tableName;
this.fieldName=_fieldName;
int count=Convert.ToInt32(this.GetValue(this.tableName,this.fieldName));
if(count>0)count--;
this.cmd.Parameters.Clear();
this.cmd.CommandText=string.Empty;
this.AddFieldItem(_fieldName,count);
this.Update(this.tableName);
return count;
}
/// <summary>
/// 根据ConditionExpress指定的条件在指定表中删除记录。返回删除的记录数。
/// </summary>
/// <param name="_tableName">指定的表名称。</param>
/// <returns>返回删除的记录数。</returns>
public int Delete(string _tableName)
{
this.tableName=_tableName;
this.SqlCmd="delete from "+this.tableName;
if(this.ConditionExpress!=string.Empty)
{
this.SqlCmd=this.SqlCmd+" where "+this.ConditionExpress;
}
this.cmd.CommandText=this.SqlCmd;
this.GenParameters();
return cmd.ExecuteNonQuery();
}
/// <summary>
/// 函数sendMsg需要 __Receive接受者 如果是系统则为 admin 否则为手机号码
/// </summary>
/// <param name="_PHONE">手机号码</param>
/// <param name="_KeyWorld">关键字</param>
/// <param name="_INFO">信息的基本内容</param>
/// <param name="_Receive">接受者</param>
/// <returns></returns>
public bool SendMsg(string _PHONE, string _KeyWorld, string _INFO, string _Receive)
{
bool SendOk;
if (_PHONE != null || _KeyWorld != null)
{
this.Reset();
this.AddFieldItem("PHONE", _PHONE);
this.AddFieldItem("KeyWorld", _KeyWorld);
this.AddFieldItem("INFO", _INFO);
this.AddFieldItem("Receive", _Receive);
this.Insert("smsRawRecv").ToString();
SendOk = true;
}
else
{
SendOk = false;
}
return SendOk;
}
/// <summary>
///
/// </summary>
/// <param name="_PHONE"></param>
/// <param name="_KeyWorld"></param>
/// <param name="_INFO"></param>
/// <param name="_Receive"></param>
/// <returns></returns>
//public bool Received(string _PHONE, string _KeyWorld, string _INFO, string _Receive)
//{
// bool Received, SendOk;
// if (SendOk)
// {
// if (_PHONE != null || _KeyWorld != null)
// {
// this.Reset();
// this.AddFieldItem("PHONE", _PHONE);
// this.AddFieldItem("KeyWorld", _KeyWorld);
// this.AddFieldItem("INFO", _INFO);
// this.AddFieldItem("Receive", _Receive);
// this.Insert("smsSended").ToString();
// Received = true;
// }
// else
// {
// Received = false;
// }
// }
// else
// {
// Received = false;
// }
//}
/// <summary>
/// 审核函数。将指定表,指定字段的值进行翻转,如:1->0或0->1。条件由ConditionExpress指定。
/// </summary>
/// <param name="_tableName">表名称。</param>
/// <param name="_fieldName">字段名称。</param>
/// <returns>返回影响的行数。</returns>
public int Audit(string _tableName,string _fieldName)
{
this.tableName=_tableName;
this.fieldName=_fieldName;
this.SqlCmd="update "+this.tableName+" set "+this.fieldName+"=1-"+this.fieldName;
if(this.ConditionExpress!=string.Empty)
{
this.SqlCmd=this.SqlCmd+" where "+this.ConditionExpress;
}
this.cmd.CommandText=this.SqlCmd;
this.GenParameters();
return cmd.ExecuteNonQuery();
}
/// <summary>
/// 释放资源
/// </summary>
public void Dispose()
{
conn.Close();
}
}
/// <summary>
/// 数据表中的字段属性,包括字段名,字段值。
/// 常用于保存要提交的数据。
/// </summary>
public class DbKeyItem
{
/// <summary>
/// 构造函数。
/// </summary>
/// <param name="_fieldName">字段名称。</param>
/// <param name="_fieldValue">字段值。</param>
public DbKeyItem(string _fieldName,object _fieldValue)
{
this.fieldName=_fieldName;
this.fieldValue=_fieldValue.ToString();
}
/// <summary>
/// 字段名称。
/// </summary>
public string fieldName;
/// <summary>
/// 字段值。
/// </summary>
public string fieldValue;
}
}
大盘预测
国富论
posted on 2007-07-27 11:09
华梦行 阅读(332)
评论(0) 编辑 收藏