C# SQL数据库操作类.doc

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1、using System;using System.Configuration;using System.Data;using System.Data.SqlClient;using System.Collections; namespace MyCorporation.DepartMent.DataBase/ / 通用数据库类/ public class DataBaseprivate string ConnStr = null;public DataBase() ConnStr = ConfigurationSettings.AppSettingsConnStr;public DataBa

2、se(string Str) try this.ConnStr = Str; catch(Exception ex) throw ex; / / 返回connection对象/ / 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(); /

3、/ 运行SQL语句/ / public void RunProc(string SQL) SqlConnection Conn; Conn = new SqlConnection(ConnStr); Conn.Open(); SqlCommand Cmd ; Cmd = CreateCmd(SQL, Conn); try Cmd.ExecuteNonQuery(); catch throw new Exception(SQL); Dispose(Conn); return; / / 运行SQL语句返回DataReader/ / / SqlDataReader对象.public SqlDataR

4、eader 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;/ / 生成Command对象/ / / /

5、public SqlCommand CreateCmd(string SQL, SqlConnection Conn) SqlCommand Cmd ; Cmd = new SqlCommand(SQL, Conn); return Cmd;/ / 生成Command对象/ / / public SqlCommand CreateCmd(string SQL) SqlConnection Conn; Conn = new SqlConnection(ConnStr); Conn.Open(); SqlCommand Cmd ; Cmd = new SqlCommand(SQL, Conn);

6、return Cmd; / / 返回adapter对象/ / / / public SqlDataAdapter CreateDa(string SQL) SqlConnection Conn; Conn = new SqlConnection(ConnStr); Conn.Open(); SqlDataAdapter Da; Da = new SqlDataAdapter(SQL, Conn); return Da;/ / 运行SQL语句,返回DataSet对象/ / SQL语句/ DataSet对象public DataSet RunProc(string SQL ,DataSet Ds)

7、 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; / / 运行SQL语句,返回DataSet对象/ / SQL语句/ DataSet对象/ 表名public DataSet RunProc(strin

8、g 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;/ / 运行SQL语句,返回DataSet对象/ / SQL语句/ DataSet对象/ 表名public DataSet RunProc(strin

9、g 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;/ / 检验是否存在数据/ / pu

10、blic 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; / / 返回SQL语句执行结果的第一行第一列/ / 字符串public string ReturnValue(string S

11、QL) SqlConnection Conn; Conn = new SqlConnection(ConnStr); Conn.Open(); string result; SqlDataReader Dr ; try Dr = CreateCmd(SQL,Conn).ExecuteReader(); if (Dr.Read() result = Dr0.ToString(); Dr.Close(); else result = ; Dr.Close(); catch throw new Exception(SQL); Dispose(Conn); return result;/ / 返回SQ

12、L语句第一列,第ColumnI列,/ / 字符串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 = DrColumnI.ToString();

13、else result = ; Dr.Close(); Dispose(Conn); return result;/ / 生成一个存储过程使用的sqlcommand./ / 存储过程名./ 存储过程入参数组./ sqlcommand对象.public SqlCommand CreateCmd(string procName, SqlParameter prams) SqlConnection Conn; Conn = new SqlConnection(ConnStr); Conn.Open(); SqlCommand Cmd = new SqlCommand(procName, Conn);

14、 Cmd.CommandType = CommandType.StoredProcedure; if (prams != null) foreach (SqlParameter parameter in prams) if(parameter != null) Cmd.Parameters.Add(parameter); return Cmd; / / 为存储过程生成一个SqlCommand对象/ / 存储过程名/ 存储过程参数/ SqlCommand对象private SqlCommand CreateCmd(string procName, SqlParameter prams,SqlDa

15、taReader 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 SqlPara

16、meter(ReturnValue, SqlDbType.Int, 4, ParameterDirection.ReturnValue, false, 0, 0, string.Empty, DataRowVersion.Default, null); return Cmd;/ / 运行存储过程,返回./ / 存储过程名/ 存储过程参数/ SqlDataReader对象public void RunProc(string procName, SqlParameter prams, SqlDataReader Dr) SqlCommand Cmd = CreateCmd(procName, pr

17、ams, Dr); Dr = Cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection); return;/ / 运行存储过程,返回./ / 存储过程名/ 存储过程参数public string RunProc(string procName, SqlParameter prams) SqlDataReader Dr; SqlCommand Cmd = CreateCmd(procName, prams); Dr = Cmd.ExecuteReader(System.Data.CommandBehavior.CloseConne

18、ction); if(Dr.Read() return Dr.GetValue(0).ToString(); else return ; / / 运行存储过程,返回dataset./ / 存储过程名./ 存储过程入参数组./ dataset对象.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;