c#銜接sqlserver數據庫、拔出數據、從數據庫獲得時光示例。本站提示廣大學習愛好者：（c#銜接sqlserver數據庫、拔出數據、從數據庫獲得時光示例）文章只能為提供參考，不一定能成為您想要的結果。以下是c#銜接sqlserver數據庫、拔出數據、從數據庫獲得時光示例正文
c#銜接sqlserver、拔出數據、從數據庫獲得時光
using System;
using System.Data.SqlClient;
namespace Test
{
//銜接數據庫
public class Connection
{
private static string connectionString =
"Server = 192.168.1.222;" +
"Database = Test;" +
"User ID = Test;" +
"Password = abc123;";
/// <summary>
/// 銜接數據庫
/// </summary>
/// <returns></returns>
private SqlConnection ConnectionOpen()
{
SqlConnection conn = new SqlConnection(connectionString);
conn.Open();
return conn;
}
/// <summary>
/// 向表(Table)中拔出一條數據
/// </summary>
public void Insert(string value1, string value2, string value3, DateTime dateTime)
{
SqlConnection conn = ConnectionOpen();
string sql =
"insert into Table(row1, row2, row3, DateTime) values ('" +
value1 + "', '" + value2 + "', '" + value3 + "', '" + dateTime + "')";
SqlCommand comm = new SqlCommand(sql, conn);
comm.ExecuteReader();
conn.Close();
}
/// <summary>
/// 從數據庫中獲得以後時光
/// </summary>
/// <returns></returns>
public DateTime GetDateTimeFromSQL()
{
SqlConnection conn = ConnectionOpen();
string sql = "select getdate()";
SqlCommand comm = new SqlCommand(sql, conn);
SqlDataReader reader = comm.ExecuteReader();
DateTime dt;
if (reader.Read())
{
dt = (DateTime)reader[0];
conn.Close();
return dt;
}
conn.Close();
return DateTime.MinValue;
}
}
}
c#銜接SQL Server 2008示例
/*
* 解釋
* 功效解釋:數據拜訪封裝。一切數據都要經由過程這個類界說的dbConnection拜訪數據庫。
* 同時，界說了通用的cmd，和cmd經常使用的拜訪存儲進程的辦法RunPro
*
* 作者: RogerWang
*
* 創立日期:2006-02-15
*
*/
using System;
using System.Data;
using System.Data.SqlClient;
namespace insurer
{
/// <summary>
/// DataAccess 的摘要解釋。
/// </summary>
public class DataAccess
{
private readonly string SQLCONNECTSTR = "server=(local);uid=sa;pwd=lwrong;database=insurer";
private SqlConnection dbConnection;
private readonly string RETUENVALUE = "RETURNVALUE";
//斷定要不要啟動事務
private bool startrans = false;
//為處理多筆數據導入的成績,特添加的事務處置屬性
private SqlTransaction trans = null;
//界說能否啟動事務屬性
public bool StartTrans
{
get
{
return startrans;
}
set
{
startrans = value;
}
}
//界說事務
public SqlTransaction Trans
{
get
{
return trans;
}
set
{
if (value != null)
{
trans = value;
}
}
}
//創立翻開dbConnection對象
public void OpenConnection()
{
if ( dbConnection == null )
{
dbConnection = new SqlConnection(SQLCONNECTSTR);
}
if ( dbConnection.State == ConnectionState.Closed )
{
try
{
dbConnection.Open();
}
catch(Exception ex)
{
SystemError.SystemLog(ex.Message);
}
finally
{
}
}
}
//釋放dbConnection對象
public void CloseConnection()
{
if (dbConnection != null)
{
if (dbConnection.State == ConnectionState.Open)
{
dbConnection.Dispose();
dbConnection = null;
}
}
}
//
//創立cmd,留意dbconnection在該函數中創立，但沒有在這函數中釋放。
//在准確的面向對象設計辦法中，對象應當是誰創立，誰就應當擔任釋放。按這個不雅點，這個進程有些不平安!!!!
private SqlCommand CreateCommand(string ProName,SqlParameter[] prams)
{
OpenConnection();
SqlCommand cmd = new SqlCommand(ProName,dbConnection);
cmd.CommandType = CommandType.StoredProcedure;
//假如停止事務處置,那末對cmd的Transaction的事務賦值
if (StartTrans)
{
cmd.Transaction = Trans;
}
if ( prams != null)
{
foreach(SqlParameter parameter in prams)
{
cmd.Parameters.Add(parameter);
}
}
//cmd.Parameters.Add(
return cmd;
}
/// <summary>
/// 創立cmd,並履行響應的操作。 然後釋放cmd!
///
/// 該函數是履行cmd沒有前往值，且沒有參數的辦法。
/// </summary>
/// <param name="ProName"></param>
public bool RunProc(string ProName)
{
SqlCommand cmd = CreateCommand(ProName,null);
bool k = false;
try
{
k = (bool)cmd.ExecuteScalar();
}
catch(Exception ex)
{
SystemError.SystemLog(ex.Message);
}
finally
{
cmd.Dispose();
}
return k;
}
/// <summary>
/// 創立cmd,並履行響應的操作。 然後釋放cmd!
///
/// 該函數是履行cmd沒有前往值,但有參數的辦法。
/// </summary>
/// <param name="ProName"></param>
/// <param name="prams"></param>
public bool RunProc(string ProName,SqlParameter[] prams)
{
SqlCommand cmd = CreateCommand(ProName,prams);
bool k = false;
try
{
k = (bool) cmd.ExecuteScalar();
}
catch(Exception ex)
{
SystemError.SystemLog(ex.Message);
}
finally
{
cmd.Dispose();
//Close();
}
return k;
}
/// <summary>
/// 創立cmd,並履行響應的操作。 然後釋放cmd!
///
/// 該函數是履行cmd帶有前往值,但沒有參數的辦法。
/// </summary>
/// <param name="ProName"></param>
/// <param name="dataReader"></param>
public void RunProc(string ProName,out SqlDataReader dataReader)
{
SqlCommand cmd = CreateCommand(ProName,null);
dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
try
{
}
catch(Exception ex)
{
SystemError.SystemLog(ex.Message);
}
finally
{
cmd.Dispose();
}
}
/// <summary>
/// 創立cmd,並履行響應的操作。 然後釋放cmd!
///
/// 該函數是履行cmd帶有前往值,且有參數的辦法。
/// </summary>
/// <param name="ProName"></param>
/// <param name="prams"></param>
/// <param name="dataReader"></param>
public void RunProc(string ProName,SqlParameter[] prams,out SqlDataReader dataReader)
{
SqlCommand cmd = CreateCommand(ProName,prams);
dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
try
{
}
catch(Exception ex)
{
SystemError.SystemLog(ex.Message);
}
finally
{
cmd.Dispose();
}
}
/// <summary>
/// 創立cmd的參數
/// 該辦法的思緒就是按前提生成一個SqlParameter對象。
/// 生成對象後，再給對象賦響應的前往值類型
/// </summary>
/// <param name="ParamName"></param>
/// <param name="DbType"></param>
/// <param name="size"></param>
/// <param name="direction"></param>
/// <param name="Value"></param>
/// <returns></returns>
public SqlParameter CreateParam(string ParamName, SqlDbType DbType, int size,ParameterDirection direction,object Value)
{
SqlParameter param;
if (size > 0)
{
param = new SqlParameter(ParamName,DbType,size);
}
else
{
param = new SqlParameter(ParamName,DbType);
}
param.Direction = direction;
param.Value = Value;
return param;
}
/// <summary>
/// 創立cmd的輸出參數
/// </summary>
/// <param name="ParamName"></param>
/// <param name="DbType"></param>
/// <param name="size"></param>
/// <param name="Value"></param>
/// <returns></returns>
public SqlParameter CreateInParam(string ParamName, SqlDbType DbType, int size, object Value)
{
return CreateParam(ParamName,DbType,size,ParameterDirection.Input,Value);
}
/// <summary>
/// 創立cmd的輸入參數
/// </summary>
/// <param name="ParamName"></param>
/// <param name="DbType"></param>
/// <param name="size"></param>
/// <returns></returns>
public SqlParameter CreateOutParam(string ParamName, SqlDbType DbType, int size)
{
return CreateParam(ParamName,DbType,size,ParameterDirection.Output,null);
}
/// <summary>
/// 創立cmd帶有前往值的參數
/// </summary>
/// <param name="ParamName"></param>
/// <param name="DbType"></param>
/// <param name="size"></param>
/// <returns></returns>
public SqlParameter CreateReturnParam(string ParamName,SqlDbType DbType, int size)
{
return CreateParam(ParamName,DbType,size,ParameterDirection.ReturnValue,null);
}
//開端一個事務
public void BeginTrans()
{
OpenConnection();
Trans = dbConnection.BeginTransaction(IsolationLevel.Serializable);
}
public void Commit()
{
if (Trans != null)
{
Trans.Commit();
}
}
public void Rollback()
{
if (Trans != null)
{
Trans.Rollback();
}
}
}
}
