Dbconn 连接问题.docx
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- 上传时间:2023-05-23
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Dbconn 连接问题.docx
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Dbconn连接问题
Dbconn连接问题
usingSystem;
usingSystem.Data;
usingSystem.Data.SqlClient;
usingSystem.Configuration;
///<summary>
///DataAccess的摘要说明。
///<description>数据处理基类,调用方式:
DataAccess.DataSet((string)sqlstr);或者DataAccess.DataSet((string)sqlstr,refDataSetds);</description>
///</summary>
publicclassDbconn
{
#region属性
protectedstaticSqlConnectionconn=newSqlConnection();
//protectedstaticboolmustCloseConnection=false;
//protectedstaticSqlCommandcomm=newSqlCommand();
#endregion
publicDbconn()
{
//init();
}
#region内部函数静态方法中不会执行Dbconn()构造函数
///<summary>
///打开数据库连接
///</summary>
privatestaticvoidopenConnection()
{
//SysConfig.ConnectionString为系统配置类中连接字符串,如:
"server=localhost;database=databasename;uid=sa;pwd=;"
if(conn.State==ConnectionState.Closed)
{
conn.ConnectionString=ConfigurationManager.AppSettings["DBConnStr"];//SysConfig.ConnectionString;
conn.Open();
}
else
{
conn.Close();
conn.ConnectionString=ConfigurationManager.AppSettings["DBConnStr"];//SysConfig.ConnectionString;
conn.Open();
}
//if(conn.State==ConnectionState.Closed)
//{
//conn.ConnectionString=ConfigurationManager.AppSettings["DBConnStr"];//SysConfig.ConnectionString;
//comm.Connection=conn;
//conn.Open();
//}
//elseif(conn.State==ConnectionState.Broken)
//{
//conn.ConnectionString=ConfigurationManager.AppSettings["DBConnStr"];//SysConfig.ConnectionString;
//comm.Connection=conn;
//conn.Close();
//conn.Open();
//}
}
///<summary>
///关闭当前数据库连接
///</summary>
privatestaticvoidcloseConnection()
{
if(conn.State==ConnectionState.Open)
conn.Close();
conn.Dispose();
//comm.Dispose();
}
#endregion
///<summary>
///执行Sql查询语句
///</summary>
///<param>传入的Sql语句</param>
publicstaticvoidExecuteSql(stringsqlstr)
{
SqlCommandcomm=newSqlCommand();
try
{
openConnection();
comm.Connection=conn;
comm.CommandType=CommandType.Text;
comm.CommandText=sqlstr;
comm.ExecuteNonQuery();
}
catch(Exceptione)
{
thrownewException(e.Message);
}
finally
{
comm.Dispose();
closeConnection();
}
}
///<summary>
///执行存储过程
///</summary>
///<param>存储过程名</param>
///<param>SqlParameters集合</param>
publicstaticvoidExecutePorcedure(stringprocName,SqlParameter[]coll)
{
SqlCommandcomm=newSqlCommand();
try
{
openConnection();
comm.Connection=conn;
for(inti=0;i<coll.Length;i++)
{
comm.Parameters.Add(coll[i]);
}
comm.CommandType=CommandType.StoredProcedure;
comm.CommandText=procName;
comm.ExecuteNonQuery();
}
catch(Exceptione)
{
thrownewException(e.Message);
}
finally
{
comm.Parameters.Clear();
comm.Dispose();
closeConnection();
}
}
///<summary>
///执行存储过程并返回数据集
///</summary>
///<param>存储过程名称</param>
///<param>SqlParameter集合</param>
///<param>DataSet</param>
publicstaticvoidExecutePorcedure(stringprocName,SqlParameter[]coll,refDataSetds)
{
SqlCommandcomm=newSqlCommand();
SqlDataAdapterda=newSqlDataAdapter();
try
{
openConnection();
comm.Connection=conn;
for(inti=0;i<coll.Length;i++)
{
comm.Parameters.Add(coll[i]);
}
comm.CommandType=CommandType.StoredProcedure;
comm.CommandText=procName;
comm.ExecuteNonQuery();
da.SelectCommand=comm;
da.Fill(ds);
}
catch(Exceptione)
{
thrownewException(e.Message);
}
finally
{
comm.Parameters.Clear();
comm.Dispose();
closeConnection();
}
}
///<summary>
///执行Sql查询语句并返回第一行的第一条记录,返回值为object使用时需要拆箱操作->Unbox
///</summary>
///<param>传入的Sql语句</param>
///<returns>object返回值</returns>
publicstaticobjectExecuteScalar(stringsqlstr)
{
objectobj=newobject();
SqlCommandcomm=newSqlCommand();
try
{
openConnection();
comm.Connection=conn;
comm.CommandType=CommandType.Text;
comm.CommandText=sqlstr;
obj=comm.ExecuteScalar();
}
catch(Exceptione)
{
thrownewException(e.Message);
}
finally
{
comm.Dispose();
closeConnection();
}
returnobj;
}
///<summary>
///执行Sql查询语句,同时进行事务处理
///</summary>
///<param>传入的Sql语句</param>
publicstaticvoidExecuteSqlWithTransaction(stringsqlstr)
{
SqlTransactiontrans;
trans=conn.BeginTransaction();
SqlCommandcomm=newSqlCommand();
comm.Transaction=trans;
try
{
openConnection();
comm.Connection=conn;
comm.CommandType=CommandType.Text;
comm.CommandText=sqlstr;
comm.ExecuteNonQuery();
trans.Commit();
}
catch
{
trans.Rollback();
}
finally
{
comm.Dispose();
closeConnection();
}
}
///<summary>
///返回指定Sql语句的SqlDataReader,请注意,在使用后请关闭本对象,同时将自动调用closeConnection()来关闭数据库连接
///方法关闭数据库连接
///</summary>
///<param>传入的Sql语句</param>
///<returns>SqlDataReader对象</returns>
publicstaticSqlDataReaderdataReader(stringsqlstr)
{
SqlDataReaderdr=null;
SqlCommandcomm=newSqlCommand();
try
{
openConnection();
comm.Connection=conn;
comm.CommandText=sqlstr;
comm.CommandType=CommandType.Text;
dr=comm.ExecuteReader(CommandBehavior.CloseConnection);
comm.Dispose();
}
catch
{
try
{
if(dr!
=null&&!
dr.IsClosed)
dr.Close();
closeConnection();
}
catch
{
}
}
returndr;
}
///<summary>
///返回指定Sql语句的SqlDataReader,请注意,在使用后请关闭本对象,同时将自动调用closeConnection()来关闭数据库连接
///方法关闭数据库连接
///</summary>
///<param>传入的Sql语句</param>
///<param>传入的refDataReader对象</param>
publicstaticvoiddataReader(stringsqlstr,refSqlDataReaderdr)
{
SqlCommandcomm=newSqlCommand();
try
{
openConnection();
comm.Connection=conn;
comm.CommandText=sqlstr;
comm.CommandType=CommandType.Text;
dr=comm.ExecuteReader(CommandBehavior.CloseConnection);
}
catch
{
try
{
if(dr!
=null&&!
dr.IsClosed)
dr.Close();
}
catch
{
}
finally
{
comm.Dispose();
closeConnection();
}
}
}
///<summary>
///返回指定Sql语句的DataSet
///</summary>
///<param>传入的Sql语句</param>
///<returns>DataSet</returns>
publicstaticDataSetdataSet(stringsqlstr)
{
DataSetds=newDataSet();
SqlCommandcomm=newSqlCommand();
SqlDataAdapterda=newSqlDataAdapter();
try
{
openConnection();
comm.Connection=conn;
comm.CommandType=CommandType.Text;
comm.CommandText=sqlstr;
da.SelectCommand=comm;
da.Fill(ds);
}
catch(Exceptione)
{
thrownewException(e.Message);
}
finally
{
comm.Dispose();
closeConnection();
}
returnds;
}
///<summary>
///返回指定Sql语句的DataSet
///</summary>
///<param>传入的Sql语句</param>
///<param>传入的引用DataSet对象</param>
publicstaticvoiddataSet(stringsqlstr,refDataSetds)
{
SqlDataAdapterda=newSqlDataAdapter();
SqlCommandcomm=newSqlCommand();
try
{
openConnection();
comm.Connection=conn;
comm.CommandType=CommandType.Text;
comm.CommandText=sqlstr;
da.SelectCommand=comm;
da.Fill(ds);
}
catch(Exceptione)
{
thrownewException(e.Message);
}
finally
{
comm.Dispose();
closeConnection();
}
}
///<summary>
///返回指定Sql语句的DataTable
///</summary>
///<param>传入的Sql语句</param>
///<returns>DataTable</returns>
publicstaticDataTabledataTable(stringsqlstr)
{
SqlDataAdapterda=newSqlDataAdapter();
DataTabledatatable=newDataTable();
SqlCommandcomm=newSqlCommand();
try
{
openConnection();
comm.Connection=conn;
comm.CommandType=CommandType.Text;
comm.CommandText=sqlstr;
da.SelectCommand=comm;
da.Fill(datatable);
}
catch(Exceptione)
{
thrownewException(e.Message);
}
finally
{
comm.Dispose();
closeConnection();
}
returndatatable;
}
///<summary>
///执行带参数存储过程并返回数据集合
///</summary>
///<param>存储过程名称</param>
///<param>SqlParameterCollection输入参数--此处改为SqlParameter对象(kxy2006-11-11)</param>
///<returns></returns>
publicstaticDataTabledataTable(stringprocName,SqlParameter[]parameters)
{
SqlDataAdapterda=newSqlDataAdapter();
DataTabledatatable=newDataTable();
SqlCommandcomm=newSqlCommand();
try
{
openConnection();
comm.Connection=conn;
comm.Parameters.Clear();
comm.CommandType=CommandType.StoredProcedure;
comm.CommandText=procName;
foreach(SqlParameterparainparameters)
{
SqlParameterp=(SqlParameter)para;
comm.Parameters.Add(p);
}
da.SelectCommand=comm;
da.Fill(datatable);
}
catch(Exceptione)
{
thrownewException(e.Message);
}
finally
{
comm.Dispose();
closeConnection();
}
returndatatable;
}
///<summary>
///执行指定Sql语句,同时给传入DataTable进行赋值
///</summary>
///<param>传入的Sql语句</param>
///<param>refDataTabledt</param>
publicstaticvoiddataTable(stringsqlstr,refDataTabledt)
{
SqlDataAdapterda=newSqlDataAdapter();
SqlCommandcomm=newSqlCommand();
try
{
openConnection();
comm.Connection=conn;
comm.CommandType=CommandType.Text;
comm.CommandText=sqlstr;
da.SelectCommand=comm;
da.Fill(dt);
}
catch(Exceptione)
{
thrownewException(e.Message);
}
finally
{
comm.Dispose();
closeConnection();
}
}
publicstaticDataViewdataView(stringsqlstr)
{
SqlDataAdapterda=newSqlDataAdapter();
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