c# SQLServer 数据库连接类

c# SQLServer 数据库连接
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Data.SqlClient;
using System.Text;
using System.Collections;
namespace BaseProject.Data
{

public class DbAccess
{
private string _EditString = "if exists({0}) begin {1} end else begin {2} end";
public string EditString
{
set { this._EditString = value; }
get { return this._EditString; }
}
SqlConnection conn = null;
SqlCommand cmd = null;
public DbAccess()
{
//
// TODO: 在此处添加构造函数逻辑
//
conn = new SqlConnection();
conn.ConnectionString = Convert.ToString(ConfigurationManager.AppSettings["datasource"]); //Convert.ToString(System.Configuration.ConfigurationSettings.AppSettings["datasource"]);
//conn.ConnectionString = "initial catalog=idyan_new;data source=.;user id=bt;password=btbtbtbt;Connect Timeout=5000";
cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandTimeout = 0;

}
public DbAccess(string constr)
{

//
// TODO: 在此处添加构造函数逻辑
//
conn = new SqlConnection();
//conn.ConnectionString = "initial catalog=pubs;data source=.;user id=sa;password=";
//conn.ConnectionString = Convert.ToString(System.Configuration.ConfigurationSettings.AppSettings["datasource"]);
conn.ConnectionString = constr;// "initial catalog=idyan_new;data source=.;user id=bt;password=btbtbtbt";
cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandTimeout = 0;

}
/// <summary>
/// 获取数据根据sql语句
/// </summary>
/// <param name="sql"></param>
/// <returns></returns>
public DataTable GetTable(string sql)
{
DataSet ds = new DataSet();

try
{
cmd.CommandText = sql;
cmd.CommandType = CommandType.Text;
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = cmd;

da.Fill(ds);
}
catch (Exception ex)
{

return null;

}
return ds.Tables[0] ?? new DataTable();
}
/// <summary>
/// 获取数据根据sql语句
/// </summary>
/// <param name="sql"></param>
/// <returns></returns>
public DataSet GetDataSet(string sql)
{
DataSet ds = new DataSet();

try
{
cmd.CommandText = sql;
cmd.CommandType = CommandType.Text;
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = cmd;

da.Fill(ds);
}
catch (Exception ex)
{

return null;

}
return ds;
}
/// <summary>
/// 获取数据根据sql语句
/// </summary>
/// <param name="sql"></param>
/// <returns></returns>
public DataSet GetDataSet(string sql, SqlParameter[] pas)
{
DataSet ds = new DataSet();

try
{
cmd.Parameters.Clear();
cmd.CommandText = sql;
foreach (SqlParameter pa in pas)
{
cmd.Parameters.Add(pa);
}
cmd.CommandType = CommandType.Text;
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = cmd;

da.Fill(ds);
}
catch (Exception ex)
{

return null;

}
return ds;
}
/// <summary>
/// 获取数据根据sql语句 带参数 的
/// </summary>
/// <param name="sql"></param>
/// <param name="pas"></param>
/// <returns></returns>
public DataTable GetTable(string sql, params SqlParameter[] pas)
{
DataSet ds = new DataSet();
try
{
cmd.CommandText = sql;
cmd.CommandType = CommandType.Text;
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = cmd;
cmd.Parameters.Clear();

foreach (SqlParameter temppa in pas)
{
cmd.Parameters.Add(temppa);
}

da.Fill(ds);
}
catch (Exception ex)
{

return null;
}
return ds.Tables[0] ?? new DataTable();
}
/// <summary>
/// 获取数据根据sql语句 带参数 的
/// </summary>
/// <param name="sql"></param>
/// <param name="pas"></param>
/// <returns></returns>
public DataTable GetProcTable(string procname, params SqlParameter[] pas)
{
DataSet ds = new DataSet();
try
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = procname;
//cmd.CommandText = sql;
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = cmd;
cmd.Parameters.Clear();

foreach (SqlParameter temppa in pas)
{
cmd.Parameters.Add(temppa);
}

da.Fill(ds);
}
catch (Exception ex)
{

return null;
}
return ds.Tables[0] ?? new DataTable();
}
/// <summary>
/// 获取数据根据sql语句 带参数 的
/// </summary>
/// <param name="sql"></param>
/// <param name="pas"></param>
/// <returns></returns>
public DataTable GetProcCursorTable(string procname, params SqlParameter[] pas)
{
DataSet ds = new DataSet();
try
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = procname;
//cmd.CommandText = sql;
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = cmd;
cmd.Parameters.Clear();

foreach (SqlParameter temppa in pas)
{
cmd.Parameters.Add(temppa);
}

da.Fill(ds);
}
catch (Exception ex)
{

return null;
}
return ds.Tables[1] ?? new DataTable();
}
/// <summary>
/// 获取数据根据sql语句 带参数 的
/// </summary>
/// <param name="sql"></param>
/// <param name="pas"></param>
/// <returns></returns>
public int GetProcState(string procname, params SqlParameter[] pas)
{
int state = 0;
try
{
OpenConn();
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = procname;
cmd.Parameters.Clear();
foreach (SqlParameter temppa in pas)
{
cmd.Parameters.Add(temppa);
}
cmd.ExecuteNonQuery();
CloseConn();
state = Convert.ToInt32(pas[pas.Length - 1].Value);

}
catch
{
return 0;
}
return state;
}
/// <summary>
/// 获取数据根据sql语句 带参数 的
/// </summary>
/// <param name="sql"></param>
/// <param name="pas"></param>
/// <returns></returns>
public int GetProcStateNo(string procname, params SqlParameter[] pas)
{
int state = 0;
try
{
OpenConn();
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = procname;
cmd.Parameters.Clear();
foreach (SqlParameter temppa in pas)
{
cmd.Parameters.Add(temppa);
}
cmd.ExecuteNonQuery();
CloseConn();
state = 1;

// state = Convert.ToInt32(pas[pas.Length - 1].Value);

}
catch
{

return 0;
}
return state;
}
/// <summary>
/// 存储过程返回值的
/// </summary>
/// <param name="sql"></param>
/// <param name="pas"></param>
/// <returns></returns>
public string GetProcStateReturnValue(string procname, params SqlParameter[] pas)
{
string state = "";
try
{
OpenConn();
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = procname;
cmd.Parameters.Clear();
foreach (SqlParameter temppa in pas)
{
cmd.Parameters.Add(temppa);
}
cmd.Parameters.AddWithValue("@Return_Value", "").Direction = ParameterDirection.ReturnValue;
cmd.ExecuteNonQuery();
state = Convert.ToString(cmd.Parameters["@Return_Value"].Value);
state = state == null ? ("") : (state);
CloseConn();

// state = Convert.ToInt32(pas[pas.Length - 1].Value);

}
catch
{

return "";
}
return state;
}
/// <summary>
/// 根据sql语句返回跟新状态
/// </summary>
/// <param name="sql"></param>
/// <returns></returns>
public bool GetState(string sql)
{
bool succ = false;
try
{
cmd.CommandType = CommandType.Text;
cmd.CommandText = sql;
OpenConn();
succ = cmd.ExecuteNonQuery() > 0 ? (true) : (false);
CloseConn();
}
catch (Exception ex)
{

return false;
}
return succ;

}
/// <summary>
/// 根据sql语句返回跟新状态带参数的
/// </summary>
/// <param name="sql">sql语句</param>
/// <param name="pas">参数的集合</param>
/// <returns></returns>
public bool GetState(string sql, params SqlParameter[] pas)
{
bool succ = false;
try
{
cmd.CommandType = CommandType.Text;
cmd.CommandText = sql;
cmd.Parameters.Clear();

foreach (SqlParameter temppa in pas)
{
cmd.Parameters.Add(temppa);
}
OpenConn();
succ = cmd.ExecuteNonQuery() > 0 ? (true) : (false);
CloseConn();
}
catch
{

// this.ShowError(ex.Message);
//using (System.IO.StreamWriter sw = new System.IO.StreamWriter("D:\\error2008.txt"))
//{
// sw.Write(ex.Message);
// sw.Flush();
//}
return false;
}
return succ;

}
/// <summary>
/// 根据sql语句返回第一个单元格的数据
/// </summary>
/// <param name="sql"></param>
/// <returns></returns>
public string GetOne(string sql)
{
string res = "";
try
{
cmd.CommandType = CommandType.Text;
cmd.CommandText = sql;
OpenConn();
res = cmd.ExecuteScalar() == null ? ("") : (Convert.ToString(cmd.ExecuteScalar()));
CloseConn();
}
catch (Exception ex)
{

return null;
}
return res;
}
/// <summary>
/// 根据sql语句返回第一个单元格的数据带参数的
/// </summary>
/// <param name="sql"></param>
/// <param name="pas"></param>
/// <returns></returns>
public string GetOne(string sql, params SqlParameter[] pas)
{
string res = "";
try
{
cmd.CommandType = CommandType.Text;
cmd.CommandText = sql;
cmd.Parameters.Clear();

foreach (SqlParameter temppa in pas)
{
cmd.Parameters.Add(temppa);
}
OpenConn();
res = cmd.ExecuteScalar() == null ? ("") : (Convert.ToString(cmd.ExecuteScalar()));
CloseConn();
}
catch (Exception ex)
{
CloseConn();

return null;
}
return res;
}
/// <summary>
/// 返回数据的DataReader
/// </summary>
/// <param name="sql"></param>
/// <returns></returns>
public SqlDataReader GetDataReader(string sql)
{
SqlDataReader dr = null;
try
{
cmd.CommandType = CommandType.Text;
conn.Open();
cmd.CommandText = sql;
dr = cmd.ExecuteReader();
}
catch (Exception ex)
{

return null;
}
return dr;
}
/// <summary>
/// 返回数据的DataReader带参数的
/// </summary>
/// <param name="sql"></param>
/// <param name="pas"></param>
/// <returns></returns>
public SqlDataReader GetDataReader(string sql, params SqlParameter[] pas)
{
SqlDataReader dr = null;
try
{
cmd.CommandType = CommandType.Text;
conn.Open();
cmd.Parameters.Clear();

foreach (SqlParameter temppa in pas)
{
cmd.Parameters.Add(temppa);
}

cmd.CommandText = sql;
dr = cmd.ExecuteReader();
}
catch (Exception ex)
{

return null;
}
return dr;
}
/// <summary>
/// 事务处理函数
/// </summary>
/// <param name="al"></param>
/// <returns></returns>
public bool GetTranState(ArrayList al)
{
cmd.CommandType = CommandType.Text;
OpenConn();
SqlTransaction tran = conn.BeginTransaction();
cmd.Transaction = tran;
try
{
for (int i = 0; i < al.Count; i++)
{
cmd.CommandText = Convert.ToString(al[i]);
cmd.ExecuteNonQuery();
}

tran.Commit();
CloseConn();
}
catch
{

tran.Rollback();
CloseConn();
return false;
}
return true;

}
/// <summary>
/// 事务处理函数
/// </summary>
/// <param name="al"></param>
/// <returns></returns>
public bool GetTranStateParameter(ArrayList al)
{
cmd.CommandType = CommandType.Text;
OpenConn();
SqlTransaction tran = conn.BeginTransaction();
cmd.Transaction = tran;
try
{
for (int i = 0; i < al.Count; i++)
{
SqlTranModel stm = (SqlTranModel)al[i];
cmd.CommandText = Convert.ToString(stm.Sql);
SqlParameter[] pas = stm.Pas;
cmd.Parameters.Clear();
foreach (SqlParameter temp in pas)
{
cmd.Parameters.Add(temp);
}
cmd.ExecuteNonQuery();
}

tran.Commit();
CloseConn();
}
catch
{

tran.Rollback();
CloseConn();
return false;
}
return true;

}
/// <summary>
/// 分页函数
/// </summary>
/// <param name="pagesize"></param>
/// <param name="columns"></param>
/// <param name="tablename"></param>
/// <param name="pid"></param>
/// <param name="order"></param>
/// <param name="current"></param>
/// <returns></returns>
public DataTable GetPageData(int current, int pagesize, string columns, string tablename, string pid, string where, string order)
{
current = current - 1 >= 0 ? (current - 1) : (0);
string sql = string.Format("select top {0} {1} from {2} where 1=1 and {3} not in(select top {4}{3} from {2} where 1=1{5} order by {6}){5} order by {6}", pagesize, columns, tablename, pid, current * pagesize, where, order);
return GetTable(sql);
}
/// <summary>
/// 分页存储过程的调用
/// </summary>
/// <param name="current"></param>
/// <param name="pagesize"></param>
/// <param name="columns"></param>
/// <param name="tablename"></param>
/// <param name="pid"></param>
/// <param name="where"></param>
/// <param name="order"></param>
/// <returns></returns>
public DataTable GetProcPageData(int current, int pagesize, string columns, string tablename, string pid, string where, string order, string ordertype)
{
SqlParameter[] pas = { new SqlParameter("@PageIndex", current), new SqlParameter("@PageSize", pagesize), new SqlParameter("@Columns", columns), new SqlParameter("@Tablename", tablename), new SqlParameter("@Where", where), new SqlParameter("@Order", order), new SqlParameter("@OrderType", ordertype), new SqlParameter("@Pid", pid) };
return GetProcTable("Pages", pas);
//current = current - 1 >= 0 ? (current - 1) : (0);
//string sql = string.Format("select top {0} {1} from {2} where 1=1 and {3} not in(select top {4}{3} from {2} where 1=1{5} order by {6}){5} order by {6}", pagesize, columns, tablename, pid, current * pagesize, where, order);
//return GetTable(sql);
}
/// <summary>
/// 分页存储过程的调用
/// </summary>
/// <param name="current"></param>
/// <param name="pagesize"></param>
/// <param name="columns"></param>
/// <param name="tablename"></param>
/// <param name="pid"></param>
/// <param name="where"></param>
/// <param name="order"></param>
/// <returns></returns>
public DataTable GetProcData(int current, int pagesize, string columns, string tablename, string pid, string where, string order, string resultCount, string distinct)
{
SqlParameter[] pas = { new SqlParameter("@TableNames", SqlDbType.NVarChar, 200), new SqlParameter("@PrimaryKey", SqlDbType.NVarChar, 100), new SqlParameter("@Order", SqlDbType.NVarChar, 200), new SqlParameter("@CurrentPage", SqlDbType.Int), new SqlParameter("@PageSize", SqlDbType.Int), new SqlParameter("@Fields", SqlDbType.NVarChar, 800), new SqlParameter("@Filter", SqlDbType.NVarChar, 1000), new SqlParameter("@ResultCount", SqlDbType.NVarChar, 12), new SqlParameter("@distinct", SqlDbType.NVarChar, 12) };
pas[0].Value = tablename;
pas[1].Value = pid;
pas[2].Value = order;
pas[3].Value = current;
pas[4].Value = pagesize;
pas[5].Value = columns;
pas[6].Value = where;
pas[7].Value = resultCount;
pas[8].Value = distinct;
return this.GetProcTable("Pages", pas);
//SqlParameter[] parameters = {
// new SqlParameter("@TableNames",SqlDbType.VarChar,8000),
// new SqlParameter("@PrimaryKey", SqlDbType.VarChar,8000),
// new SqlParameter("@Order", SqlDbType.VarChar,8000),
// new SqlParameter("@CurrentPage",SqlDbType.Int),
// new SqlParameter("@PageSize", SqlDbType.Int),
// new SqlParameter("@Fields",SqlDbType.VarChar,8000),
// new SqlParameter("@Filter", SqlDbType.VarChar,8000),
// new SqlParameter("@Group", SqlDbType.VarChar,8000)
// };
//parameters[0].Value = tablename;
//parameters[1].Value = pid;
//parameters[2].Value = order;
//parameters[3].Value = current;
//parameters[4].Value = pagesize;
//parameters[5].Value = columns;
//parameters[6].Value = where;
//parameters[7].Value = "";
//DataSet ds = DbHelperSQL.RunProcedure("Pages", parameters, "data");

//return ds.Tables["data"];//
//return GetProcTable("Pages", pas);
//current = current - 1 >= 0 ? (current - 1) : (0);
//string sql = string.Format("select top {0} {1} from {2} where 1=1 and {3} not in(select top {4}{3} from {2} where 1=1{5} order by {6}){5} order by {6}", pagesize, columns, tablename, pid, current * pagesize, where, order);
//return GetTable(sql);
}
/// <summary>
/// 分页存储过程的调用
/// </summary>
/// <param name="current"></param>
/// <param name="pagesize"></param>
/// <param name="columns"></param>
/// <param name="tablename"></param>
/// <param name="pid"></param>
/// <param name="where"></param>
/// <param name="order"></param>
/// <returns></returns>
public DataTable GetProcAdminData(int current, int pagesize, string columns, string tablename, string pid, string where, string order, string resultCount, string distinct)
{
SqlParameter[] pas = { new SqlParameter("@TableNames", SqlDbType.NVarChar, 200), new SqlParameter("@PrimaryKey", SqlDbType.NVarChar, 100), new SqlParameter("@Order", SqlDbType.NVarChar, 200), new SqlParameter("@CurrentPage", SqlDbType.Int), new SqlParameter("@PageSize", SqlDbType.Int), new SqlParameter("@Fields", SqlDbType.NVarChar, 800), new SqlParameter("@Filter", SqlDbType.NVarChar, 200), new SqlParameter("@ResultCount", SqlDbType.NVarChar, 24), new SqlParameter("@Distinct", SqlDbType.NVarChar, 12) };
pas[0].Value = tablename;
pas[1].Value = pid;
pas[2].Value = order;
pas[3].Value = current;
pas[4].Value = pagesize;
pas[5].Value = columns;
pas[6].Value = where;
pas[7].Value = resultCount;
pas[8].Value = distinct;
return this.GetProcTable("Pages", pas);

}
/// <summary>
/// 打开连接
/// </summary>
public void OpenConn()
{
if (conn.State != ConnectionState.Open)
{
try
{
conn.Open();
}
catch (Exception ex)
{

return;
}
}
}
/// <summary>
/// 关闭连接
/// </summary>
public void CloseConn()
{
if (conn.State != ConnectionState.Closed)
{
try
{
conn.Close();

}
catch (Exception ex)
{

return;
}
}
}
public void DisposeConn()
{
try
{
if (conn.State != ConnectionState.Closed)
{
try
{
conn.Close();

}
catch (Exception ex)
{

return;
}
}
}
catch
{

}
}

}
public class SqlTranModel
{
private string _sql;
public string Sql
{
set { this._sql = value; }
get { return this._sql; }
}
private SqlParameter[] _pas;
public SqlParameter[] Pas
{
set { this._pas = value; }
get { return this._pas; }
}
}
}

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