求个增删改查的通用基类。
今天不要脸皮，跪求基类。
只为学习用。
[解决办法]
用微软的sqlhelper
[解决办法]
微软的
public abstract class SQLHelper
{
/// <summary>
/// 连接字符串
/// </summary>
public static readonly string ConnectionString = "数据库连接字符串";
private static Hashtable parmCache = Hashtable.Synchronized(new Hashtable());
/// <summary>
/// 数据库增,删,改方法
/// </summary>
/// <param name="connectionString">连接字符串 </param>
/// <param name="cmdType">Command类型 </param>
/// <param name="cmdText">执行文本 </param>
/// <param name="commandParameters">参数 </param>
/// <returns> </returns>
public static int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
using (SqlConnection conn = new SqlConnection(connectionString))
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
}
/// <summary>a
/// 数据库增,删,改方法
/// </summary>
/// <param name="connection">连接对象 </param>
/// <param name="cmdType">Command类型 </param>
/// <param name="cmdText">执行文本 </param>
/// <param name="commandParameters">参数 </param>
/// <returns> </returns>
public static int ExecuteNonQuery(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
/// <summary>
/// 数据库增,删,改方法
/// </summary>
/// <param name="trans">事务 </param>
/// <param name="cmdType">Command类型 </param>
/// <param name="cmdText">执行文本 </param>
/// <param name="commandParameters">参数 </param>
/// <returns> </returns>
public static int ExecuteNonQuery(SqlTransaction trans, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
/// <summary>
/// 读取数据
/// </summary>
/// <param name="connectionString">连接字符串 </param>
/// <param name="cmdType">Command类型 </param>
/// <param name="cmdText">执行文本 </param>
/// <param name="commandParameters">参数 </param>
/// <returns>SqlDataReader </returns>
public static SqlDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
SqlConnection conn = new SqlConnection(connectionString);
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return rdr;
}
catch(SqlException ex)
{
string s = ex.Message;
conn.Close();
throw;
}
}
/// <summary>
/// 读取数据
/// </summary>
/// <param name="safeSql">执行文本 </param>
/// <param name="cmdType">command类型 </param>
/// <param name="connectionString">连接字符串 </param>
/// <returns>DataTable </returns>
public static DataTable GetDataSet(string safeSql,CommandType cmdType, string connectionString)
{
DataSet ds = new DataSet();
using (SqlConnection conn = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(safeSql, conn);
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds);
return ds.Tables[0];
}
}
/// <summary>
/// 读取数据
/// </summary>
/// <param name="connectionString">连接字符串 </param>
/// <param name="cmdType">command类型 </param>
/// <param name="sql">执行文本 </param>
/// <param name="values">参数 </param>
/// <returns>DataTable </returns>
public static DataTable GetDataSet(string connectionString,CommandType cmdType, string sql, params SqlParameter[] values)
{
DataSet ds = new DataSet();
using (SqlConnection conn = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(sql, conn);
cmd.CommandType = cmdType;
cmd.Parameters.AddRange(values);
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds);
return ds.Tables[0];
}
}
/// <summary>
/// 得到单个返回值结果
/// </summary>
/// <param name="connectionString">连接字符串 </param>
/// <param name="cmdType">command类型 </param>
/// <param name="cmdText">执行文本 </param>
/// <param name="commandParameters">参数 </param>
/// <returns>object对象 </returns>
public static object ExecuteScalar(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
using (SqlConnection connection = new SqlConnection(connectionString))
{
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return val;
}
}
/// <summary>
/// 得到单个返回值结果
/// </summary>
/// <param name="connection">连接对象 </param>
/// <param name="cmdType">command类型 </param>
/// <param name="cmdText">执行文本 </param>
/// <param name="commandParameters">参数 </param>
/// <returns>object对象 </returns>
public static object ExecuteScalar(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return val;
}
public static void CacheParameters(string cacheKey, params SqlParameter[] commandParameters)
{
parmCache[cacheKey] = commandParameters;
}
public static SqlParameter[] GetCachedParameters(string cacheKey)
{
SqlParameter[] cachedParms = (SqlParameter[])parmCache[cacheKey];
if (cachedParms == null)
return null;
SqlParameter[] clonedParms = new SqlParameter[cachedParms.Length];
for (int i = 0, j = cachedParms.Length; i < j; i++)
clonedParms[i] = (SqlParameter)((ICloneable)cachedParms[i]).Clone();
return clonedParms;
}
/// <summary>
/// 处理ADO.NET数据操作对象
/// </summary>
/// <param name="cmd">执行对象 </param>
/// <param name="conn">连接对象 </param>
/// <param name="trans">事务对象 </param>
/// <param name="cmdType">command类型 </param>
/// <param name="cmdText">执行文本 </param>
/// <param name="cmdParms">参数 </param>
private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = cmdType;
if (cmdParms != null)
{
foreach (SqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace DBAccess
{
public class SqlHelper:DBAccess
{
private List <SqlParameter> m_ListParameter = null;
public DataTable ExecuteDataTable(string cmdText, params SqlParameter[] commandParameters)
{
DataSet ds = ExecuteDataSet(cmdText, commandParameters);
if (null != ds)
{
if (0 != ds.Tables.Count)
{
return ds.Tables[0];
}
else
{
return null;
}
}
else
{
return null;
}
}
public DataTable ExecuteDataTable(string cmdText)
{
return ExecuteDataTable(cmdText, GetParameters());
}
public DataRow ExecuteDataRow(string cmdText, params SqlParameter[] commandParameters)
{
DataTable dt = ExecuteDataTable(cmdText, commandParameters);
if (null != dt)
{
if (0 != dt.Rows.Count)
{
return dt.Rows[0];
}
else
{
return null;
}
}
else
{
return null;
}
}
public DataRow ExecuteDataRow(string cmdText)
{
return ExecuteDataRow(cmdText, GetParameters());
}
public int ExecuteNonQuery(string cmdText)
{
return ExecuteNonQuery(cmdText, GetParameters());
}
public int ExecuteNonQuery(SqlTransaction trans, string cmdText)
{
return ExecuteNonQuery(trans, cmdText, GetParameters());
}
public DataSet ExecuteDataSet(string cmdText)
{
return ExecuteDataSet(cmdText, GetParameters());
}
public SqlDataReader ExecuteReader(string cmdText)
{
return ExecuteReader(cmdText, GetParameters());
}
public object ExecuteScalar(string cmdText)
{
return ExecuteScalar(cmdText, GetParameters());
}
private SqlParameter GetParameter(string paraName, SqlDbType paraType, object value)
{
SqlParameter para = new SqlParameter(paraName, paraType);
para.Value = value;
return para;
}
private SqlParameter GetParameter(string paraName, SqlDbType paraType, object value, int size)
{
SqlParameter para = new SqlParameter(paraName, paraType);
para.Value = value;
para.Size = size;
return para;
}
public void AddParameter(string paraName, SqlDbType paraType, object value)
{
if (null == m_ListParameter)
{
m_ListParameter = new List <SqlParameter>();
}
SqlParameter para = GetParameter(paraName, paraType, value);
m_ListParameter.Add(para);
}
private SqlParameter[] GetParameters()
{
SqlParameter[] paras = null;
if (null != m_ListParameter)
{
if (0 != m_ListParameter.Count)
{
paras = m_ListParameter.ToArray();
}
m_ListParameter = null;
}
return paras;
}
}
}
using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace DBAccess
{
public class SqlHelper:DBAccess
{
private List <SqlParameter> m_ListParameter = null;
public DataTable ExecuteDataTable(string cmdText, params SqlParameter[] commandParameters)
{
DataSet ds = ExecuteDataSet(cmdText, commandParameters);
if (null != ds)
{
if (0 != ds.Tables.Count)
{
return ds.Tables[0];
}
else
{
return null;
}
}
else
{
return null;
}
}
public DataTable ExecuteDataTable(string cmdText)
{
return ExecuteDataTable(cmdText, GetParameters());
}
public DataRow ExecuteDataRow(string cmdText, params SqlParameter[] commandParameters)
{
DataTable dt = ExecuteDataTable(cmdText, commandParameters);
if (null != dt)
{
if (0 != dt.Rows.Count)
{
return dt.Rows[0];
}
else
{
return null;
}
}
else
{
return null;
}
}
public DataRow ExecuteDataRow(string cmdText)
{
return ExecuteDataRow(cmdText, GetParameters());
}
public int ExecuteNonQuery(string cmdText)
{
return ExecuteNonQuery(cmdText, GetParameters());
}
public int ExecuteNonQuery(SqlTransaction trans, string cmdText)
{
return ExecuteNonQuery(trans, cmdText, GetParameters());
}
public DataSet ExecuteDataSet(string cmdText)
{
return ExecuteDataSet(cmdText, GetParameters());
}
public SqlDataReader ExecuteReader(string cmdText)
{
return ExecuteReader(cmdText, GetParameters());
}
public object ExecuteScalar(string cmdText)
{
return ExecuteScalar(cmdText, GetParameters());
}
private SqlParameter GetParameter(string paraName, SqlDbType paraType, object value)
{
SqlParameter para = new SqlParameter(paraName, paraType);
para.Value = value;
return para;
}
private SqlParameter GetParameter(string paraName, SqlDbType paraType, object value, int size)
{
SqlParameter para = new SqlParameter(paraName, paraType);
para.Value = value;
para.Size = size;
return para;
}
public void AddParameter(string paraName, SqlDbType paraType, object value)
{
if (null == m_ListParameter)
{
m_ListParameter = new List <SqlParameter>();
}
SqlParameter para = GetParameter(paraName, paraType, value);
m_ListParameter.Add(para);
}
private SqlParameter[] GetParameters()
{
SqlParameter[] paras = null;
if (null != m_ListParameter)
{
if (0 != m_ListParameter.Count)
{
paras = m_ListParameter.ToArray();
}
m_ListParameter = null;
}
return paras;
}
}
}
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Data;/// <summary>///BasePge 的摘要说明/// </summary>public class BasePage:System.Web.UI.Page{ public BasePage() { // //TODO: 在此处添加构造函数逻辑 // } // //执行数据库操作的方法 // protected virtual DataSet GetDataSet(String query) { //...... return new DataSet(); }}
------解决方案--------------------
mark！
学习。。。