asp.net 数据库连接类代码(SQL)

public class SqlOperation
{
#region 属性
/// <summary>
/// 保存在Web.config中的连接字符串
/// </summary>
protected static string connectionstring = System.Configuration.ConfigurationManager.ConnectionStrings["hao"].ConnectionString;
/// <summary>
/// SqlConnection对象
/// </summary>
protected static SqlConnection conn = new SqlConnection();
/// <summary>
/// SqlCommand对象
/// </summary>
protected static SqlCommand comm = new SqlCommand();
#endregion

#region 内部函数
/// <summary>
/// 打开数据库连接
/// </summary>
private static void ConnectionOpen()
{
if (conn.State != ConnectionState.Open)
{
conn.Close();
conn.ConnectionString = connectionstring;
comm.Connection = conn;
try
{
conn.Open();
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
}

/// <summary>
/// 关闭数据库连接
/// </summary>
private static void ConnectionClose()
{
conn.Close();
conn.Dispose();
comm.Dispose();
}

#endregion

/// <summary>
/// 执行SQL语句
/// </summary>
/// <param name="SqlString">要执行的SQL语句</param>
public static void ExecuteSQL(string SqlString)
{
try
{
ConnectionOpen();
comm.CommandType = CommandType.Text;
comm.CommandText = SqlString;
comm.ExecuteNonQuery();
}
catch (Exception ex)
{
try
{
ConnectionClose();
}
catch (Exception e)
{
throw new Exception(e.Message);
}
throw new Exception(ex.Message);
}
finally
{
ConnectionClose();
}
}

/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="ProcedureName">存储过程名称</param>
/// <param name="coll">存储过程需要的参数集合</param>
public static void ExecuteProcedure(string ProcedureName, params SqlParameter[] coll)
{
try
{
ConnectionOpen();
comm.CommandType = CommandType.StoredProcedure;
comm.CommandText = ProcedureName;
comm.Parameters.Clear();
for (int i = 0; i < coll.Length; i++)
{
comm.Parameters.Add(coll[i]);
}
comm.ExecuteNonQuery();
}
catch (Exception ex)
{
try
{
ConnectionClose();
}
catch (Exception e)
{
throw new Exception(e.Message);
}
throw new Exception(ex.Message);
}
finally
{
ConnectionClose();
}
}

/// <summary>
/// 执行Sql查询并返回第一行的第一条记录，返回object，使用时需要拆箱 -> unbox
/// </summary>
/// <param name="sqlstr">传入的Sql语句</param>
/// <returns>返回object类型的第一行第一条记录</returns>
public static object ExecuteScalar(string SqlString)
{
object obj = new object();
try
{
ConnectionOpen();
comm.CommandType = CommandType.Text;
comm.CommandText = SqlString;
obj = comm.ExecuteScalar();
}
catch (Exception ex)
{
try
{
ConnectionClose();
}
catch (Exception e)
{
throw new Exception(e.Message);
}
throw new Exception(ex.Message);
}
finally
{
ConnectionClose();
}
return obj;
}

/// <summary>
/// 执行SQL语句,同时进行事务处理
/// </summary>
/// <param name="sqlstr">要执行的SQL语句</param>
public static void ExecuteTransactionSQL(string SqlString)
{
SqlTransaction trans;
trans = conn.BeginTransaction();
comm.Transaction = trans;
try
{
ConnectionOpen();
comm.CommandType = CommandType.Text;
comm.CommandText = SqlString;
comm.ExecuteNonQuery();
trans.Commit();
}
catch (Exception ex)
{
try
{
ConnectionClose();
}
catch (Exception e)
{
throw new Exception(e.Message);
}
throw new Exception(ex.Message);
}
finally
{
ConnectionClose();
}
}

/// <summary>
/// 执行指定SQL查询，返回DataSet
/// </summary>
/// <param name="sqlstr">要执行的SQL语句</param>
/// <returns>DataSet</returns>
public static DataSet GetDataSetBySQL(string SqlString)
{
SqlDataAdapter da = new SqlDataAdapter();
DataSet ds = new DataSet();
try
{
ConnectionOpen();
comm.CommandType = CommandType.Text;
comm.CommandText = SqlString;
da.SelectCommand = comm;
da.Fill(ds);
}
catch (Exception ex)
{
try
{
ConnectionClose();
}
catch (Exception e)
{
throw new Exception(e.Message);
}
throw new Exception(ex.Message);
}
finally
{
ConnectionClose();
}
return ds;
}

/// <summary>
/// 通过存储过程返回DataSet
/// </summary>
/// <param name="ProcedureName">存储过程名称</param>
/// <param name="coll">SqlParameter集合</param>
/// <returns>DataSet</returns>
public static DataSet GetDataSetByProcedure(string ProcedureName, params SqlParameter[] coll)
{
SqlDataAdapter da = new SqlDataAdapter();
DataSet ds = new DataSet();
try
{
ConnectionOpen();
comm.CommandType = CommandType.StoredProcedure;
comm.Parameters.Clear();
for (int i = 0; i < coll.Length; i++)
{
comm.Parameters.Add(coll[i]);
}
comm.CommandText = ProcedureName;
da.SelectCommand = comm;
da.Fill(ds);
}
catch (Exception ex)
{
try
{
ConnectionClose();
}
catch (Exception e)
{
throw new Exception(e.Message);
}
throw new Exception(ex.Message);
}
finally
{
ConnectionClose();
}
return ds;
}


/// <summary>
/// 通过存储过程返回DataSet
/// </summary>
/// <param name="ProcedureName">存储过程名称</param>
/// <returns>DataSet</returns>
public static DataSet GetDataSetByProcedure(string ProcedureName)
{
SqlDataAdapter da = new SqlDataAdapter();
DataSet ds = new DataSet();
try
{
ConnectionOpen();
comm.CommandType = CommandType.StoredProcedure;
comm.CommandText = ProcedureName;
comm.Parameters.Clear();
da.SelectCommand = comm;
da.Fill(ds);
}
catch (Exception ex)
{
try
{
ConnectionClose();
}
catch (Exception e)
{
throw new Exception(e.Message);
}
throw new Exception(ex.Message);
}
finally
{
ConnectionClose();
}
return ds;
}

/// <summary>
/// 返回指定sql语句的DataTable
/// </summary>
/// <param name="sqlstr">传入的Sql语句</param>
/// <returns>DataTable</returns>
public static DataTable GetDataTableBySQL(string SqlString)
{
SqlDataAdapter da = new SqlDataAdapter();
DataTable dt = new DataTable();
try
{
ConnectionOpen();
comm.CommandType = CommandType.Text;
comm.CommandText = SqlString;
da.SelectCommand = comm;
da.Fill(dt);
}
catch (Exception ex)
{
try
{
ConnectionClose();
}
catch (Exception e)
{
throw new Exception(e.Message);
}
throw new Exception(ex.Message);
}
finally
{
ConnectionClose();
}
return dt;
}

/// <summary>
/// 根据存储过程返回DataTable
/// </summary>
/// <param name="ProcedureName">存储过程名</param>
/// <param name="coll">SqlParameter集合</param>
/// <returns>DataTable</returns>
public static DataTable GetDataTableByProcedure(string ProcedureName, params SqlParameter[] coll)
{
SqlDataAdapter da = new SqlDataAdapter();
DataTable dt = new DataTable();
try
{
ConnectionOpen();
comm.Parameters.Clear();
comm.CommandType = CommandType.StoredProcedure;
comm.CommandText = ProcedureName;
for (int i = 0; i < coll.Length; i++)
{
comm.Parameters.Add(coll[i]);
}
da.SelectCommand = comm;
da.Fill(dt);
}
catch (Exception ex)
{
try
{
ConnectionClose();
}
catch (Exception e)
{
throw new Exception(e.Message);
}
throw new Exception(ex.Message);
}
finally
{
ConnectionClose();
}
return dt;
}

/// <summary>
/// 根据存储过程返回DataTable
/// </summary>
/// <param name="ProcedureName">存储过程名称</param>
/// <returns>DataTable</returns>
public static DataTable GetDataTableByProcedure(string ProcedureName)
{
SqlDataAdapter da = new SqlDataAdapter();
DataTable dt = new DataTable();
try
{
ConnectionOpen();
comm.Parameters.Clear();
comm.CommandType = CommandType.StoredProcedure;
comm.CommandText = ProcedureName;
da.SelectCommand = comm;
da.Fill(dt);
}
catch (Exception ex)
{
try
{
ConnectionClose();
}
catch (Exception e)
{
throw new Exception(e.Message);
}
throw new Exception(ex.Message);
}
finally
{
ConnectionClose();
}
return dt;
}
}