asp.net开发中常用的sql server数据库操作...

前言:最初做web开发的时候,经常会碰到对数据库的增删改的操作,因而经常会重复的写很多代码,感觉在做很多重复的工作,特郁闷,所以自己想把常用的操作封装成类,但是自己又是比较菜的菜鸟,比较懒..呵呵...,就在网站搜索,有很多,我找到一个比较全的,至少对于我来讲是这样,然后根据自己的需要增加了一两个方法,做成一个DB操作类,所以以后每次做web项目就把这类拿过去,省了很多事,因此帖在此处,让更多初学者学习使用它
申明：这个类是我在网上找到的，版权归原作者所有 ，我只是根据我的需要做了小小的修改
DB.CS类：
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
/**//// <summary>
/// DB 的摘要说明
/// </summary>
public class DB
...{
private string ConnStr = null;
public DB()
...{
//
// TODO: 在此处添加构造函数逻辑
ConnStr = System.Web.Configuration.WebConfigurationManager.ConnectionStrings["EAConString"].ToString();
//
}
public DB(string Str)
...{
try
...{
this.ConnStr = Str;
}
catch (Exception ex)
...{
throw ex;
}
}
public string constr()
...{
return System.Web.Configuration.WebConfigurationManager.ConnectionStrings["EAConString"].ToString();
}
public static SqlConnection CreateCon()
...{
return new SqlConnection(System.Web.Configuration.WebConfigurationManager.ConnectionStrings["EAConString"].ToString());
}
/**//// <summary>
/// 返回connection对象
/// </summary>
/// <returns></returns>
public SqlConnection ReturnConn()
...{
SqlConnection Conn = new SqlConnection(ConnStr);
Conn.Open();
return Conn;
}
public void Dispose(SqlConnection Conn)
...{
if (Conn != null)
...{
Conn.Close();
Conn.Dispose();
}
GC.Collect();
}
/**//// <summary>
/// 运行SQL语句
/// </summary>
/// <param name="SQL"></param>
public void RunProc(string SQL)
...{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlCommand Cmd;
Cmd = CreateCmd(SQL, Conn);
try
...{
Cmd.ExecuteNonQuery();
}
catch(Exception ex)
...{
string exm = ex.Message;
throw new Exception(SQL);
}
Dispose(Conn);
return;
}
/**//// <summary>
/// 运行SQL语句返回DataReader
/// </summary>
/// <param name="SQL"></param>
/// <returns>SqlDataReader对象.</returns>
public SqlDataReader RunProcGetReader(string SQL)
...{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlCommand Cmd;
Cmd = CreateCmd(SQL, Conn);
SqlDataReader Dr;
try
...{
Dr = Cmd.ExecuteReader(CommandBehavior.Default);
}
catch
...{
throw new Exception(SQL);
}
//Dispose(Conn);
return Dr;
}
/**//// <summary>
/// 生成Command对象
/// </summary>
/// <param name="SQL"></param>
/// <param name="Conn"></param>
/// <returns></returns>
public SqlCommand CreateCmd(string SQL, SqlConnection Conn)
...{
SqlCommand Cmd;
Cmd = new SqlCommand(SQL, Conn);
return Cmd;
}
/**//// <summary>
/// 生成Command对象
/// </summary>
/// <param name="SQL"></param>
/// <returns></returns>
public SqlCommand CreateCmd(string SQL)
...{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlCommand Cmd;
Cmd = new SqlCommand(SQL, Conn);
return Cmd;
}
/**//// <summary>
/// 返回adapter对象
/// </summary>
/// <param name="SQL"></param>
/// <param name="Conn"></param>
/// <returns></returns>
public SqlDataAdapter CreateDa(string SQL)
...{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlDataAdapter Da;
Da = new SqlDataAdapter(SQL, Conn);
return Da;
}
/**//// <summary>
/// 运行SQL语句,返回DataSet对象
/// </summary>
/// <param name="procName">SQL语句</param>
/// <param name="prams">DataSet对象</param>
public DataSet RunProc(string SQL, DataSet Ds)
...{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlDataAdapter Da;
//Da = CreateDa(SQL, Conn);
Da = new SqlDataAdapter(SQL, Conn);
try
...{
Da.Fill(Ds);
}
catch (Exception Err)
...{
throw Err;
}
Dispose(Conn);
return Ds;
}
/**//// <summary>
/// 运行SQL语句,返回DataSet对象
/// </summary>
/// <param name="procName">SQL语句</param>
/// <param name="prams">DataSet对象</param>
/// <param name="dataReader">表名</param>
public DataSet RunProc(string SQL, DataSet Ds, string tablename)
...{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlDataAdapter Da;
Da = CreateDa(SQL);
try
...{
Da.Fill(Ds, tablename);
}
catch (Exception Ex)
...{
throw Ex;
}
Dispose(Conn);
return Ds;
}
/**//// <summary>
/// 运行SQL语句,返回DataSet对象
/// </summary>
/// <param name="procName">SQL语句</param>
/// <param name="prams">DataSet对象</param>
/// <param name="dataReader">表名</param>
public DataSet RunProc(string SQL, DataSet Ds, int StartIndex, int PageSize, string tablename)
...{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlDataAdapter Da;
Da = CreateDa(SQL);
try
...{
Da.Fill(Ds, StartIndex, PageSize, tablename);
}
catch (Exception Ex)
...{
throw Ex;
}
Dispose(Conn);
return Ds;
}
/**//// <summary>
/// 检验是否存在数据
/// </summary>
/// <returns></returns>
public bool ExistDate(string SQL)
...{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlDataReader Dr;
Dr = CreateCmd(SQL, Conn).ExecuteReader();
if (Dr.Read())
...{
Dispose(Conn);
return true;
}
else
...{
Dispose(Conn);
return false;
}
}
/**//// <summary>
/// 返回SQL语句执行结果的第一行第一列
/// </summary>
/// <returns>字符串</returns>
public string ReturnValue(string SQL)
...{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
string result;
SqlDataReader Dr;
try
...{
Dr = CreateCmd(SQL, Conn).ExecuteReader();
if (Dr.Read())
...{
result = Dr[0].ToString();
Dr.Close();
}
else
...{
result = "";
Dr.Close();
}
}
catch
...{
throw new Exception(SQL);
}
Dispose(Conn);
return result;
}
/**//// <summary>
/// 返回SQL语句第一列,第ColumnI列,
/// </summary>
/// <returns>字符串</returns>
public string ReturnValue(string SQL, int ColumnI)
...{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
string result;
SqlDataReader Dr;
try
...{
Dr = CreateCmd(SQL, Conn).ExecuteReader();
}
catch
...{
throw new Exception(SQL);
}
if (Dr.Read())
...{
result = Dr[ColumnI].ToString();
}
else
...{
result = "";
}
Dr.Close();
Dispose(Conn);
return result;
}
/**//// <summary>
/// 生成一个存储过程使用的sqlcommand.
/// </summary>
/// <param name="procName">存储过程名.</param>
/// <param name="prams">存储过程入参数组.</param>
/// <returns>sqlcommand对象.</returns>
public SqlCommand CreateCmd(string procName, SqlParameter[] prams)
...{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlCommand Cmd = new SqlCommand(procName, Conn);
Cmd.CommandType = CommandType.StoredProcedure;
if (prams != null)
...{
foreach (SqlParameter parameter in prams)
...{
if (parameter != null)
...{
Cmd.Parameters.Add(parameter);
}
}
}
return Cmd;
}
/**//// <summary>
/// 为存储过程生成一个SqlCommand对象
/// </summary>
/// <param name="procName">存储过程名</param>
/// <param name="prams">存储过程参数</param>
/// <returns>SqlCommand对象</returns>
private SqlCommand CreateCmd(string procName, SqlParameter[] prams, SqlDataReader Dr)
...{
SqlConnection Conn;
Conn = new SqlConnection(ConnStr);
Conn.Open();
SqlCommand Cmd = new SqlCommand(procName, Conn);
Cmd.CommandType = CommandType.StoredProcedure;
if (prams != null)
...{
foreach (SqlParameter parameter in prams)
Cmd.Parameters.Add(parameter);
}
Cmd.Parameters.Add(
new SqlParameter("ReturnValue", SqlDbType.Int, 4,
ParameterDirection.ReturnValue, false, 0, 0,
string.Empty, DataRowVersion.Default, null));
return Cmd;
}
/**//// <summary>
/// 运行存储过程,返回.
/// </summary>
/// <param name="procName">存储过程名</param>
/// <param name="prams">存储过程参数</param>
/// <param name="dataReader">SqlDataReader对象</param>
public void RunProc(string procName, SqlParameter[] prams, SqlDataReader Dr)
...{
SqlCommand Cmd = CreateCmd(procName, prams, Dr);
Dr = Cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
return;
}
/**//// <summary>
/// 运行存储过程,返回.
/// </summary>
/// <param name="procName">存储过程名</param>
/// <param name="prams">存储过程参数</param>
public string RunProc(string procName, SqlParameter[] prams)
...{
SqlDataReader Dr;
SqlCommand Cmd = CreateCmd(procName, prams);
Dr = Cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
if (Dr.Read())
...{
return Dr.GetValue(0).ToString();
}
else
...{
return "";
}
}
/**//// <summary>
/// 运行存储过程,返回dataset.
/// </summary>
/// <param name="procName">存储过程名.</param>
/// <param name="prams">存储过程入参数组.</param>
/// <returns>dataset对象.</returns>
public DataSet RunProc(string procName, SqlParameter[] prams, DataSet Ds)
...{
SqlCommand Cmd = CreateCmd(procName, prams);
SqlDataAdapter Da = new SqlDataAdapter(Cmd);
try
...{
Da.Fill(Ds);
}
catch (Exception Ex)
...{
throw Ex;
}
return Ds;
}
}

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