297 lines
9.8 KiB
C#
297 lines
9.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Data.SqlClient;
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using System.Linq;
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using System.Text;
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using System.Configuration;
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namespace BeginScreen
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{
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public static class DBHelper
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{
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private static readonly string _ConnectionString = ConfigurationManager.ConnectionStrings["MindraySqlString"].ToString();
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//App.config中如果加密，应先解密再使用
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//此处添加解密代码
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private static SqlConnection mConnection;
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/// <summary>
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/// 得到一个已经Open的Connection连接对象
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/// </summary>
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public static SqlConnection Connection
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{
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get
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{
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if (mConnection == null)
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{
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mConnection = new SqlConnection(_ConnectionString);
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}
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if (mConnection.State == ConnectionState.Closed)
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{
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mConnection.Open();
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}
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else if (mConnection.State == ConnectionState.Broken)
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{
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mConnection.Close();
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mConnection.Open();
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}
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return mConnection;
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}
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}
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/// <summary>
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/// 执行sql操作（增、删、改）
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/// </summary>
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/// <param name="sql">sql语句</param>
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/// <returns>执行的记录数</returns>
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public static int ExecNonQuery(string sql)
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{
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SqlCommand cmd = new SqlCommand(sql, Connection);
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return cmd.ExecuteNonQuery();
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}
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/// <summary>
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/// 执行sql操作（增、删、改），以参数方式传值
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/// </summary>
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/// <param name="sql">sql语句</param>
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/// <param name="values">参数数组</param>
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/// <returns>执行的记录数</returns>
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public static int ExecNonQuery(string sql, params SqlParameter[] values)
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{
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SqlCommand cmd = new SqlCommand(sql, Connection);
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cmd.Parameters.AddRange(values);
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return cmd.ExecuteNonQuery();
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}
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/// <summary>
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/// 执行sql查询，得到单个值
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/// </summary>
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/// <param name="safeSql">得到单个值的sql查询语句</param>
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/// <returns>单个值对象</returns>
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public static object ExecuteScalar(string safeSql)
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{
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SqlCommand cmd = new SqlCommand(safeSql, Connection);
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return cmd.ExecuteScalar();
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}
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/// <summary>
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/// 执行sql查询，得到单个值，以参数方式传值
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/// </summary>
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/// <param name="safeSql">得到单个值的sql查询语句</param>
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/// <param name="values">参数数组</param>
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/// <returns>单个值对象</returns>
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public static object ExecuteScalar(string safeSql, params SqlParameter[] values)
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{
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SqlCommand cmd = new SqlCommand(safeSql, Connection);
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cmd.Parameters.AddRange(values);
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return cmd.ExecuteScalar();
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}
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/// <summary>
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/// 执行sql查询，得到一个DataReader对象
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/// </summary>
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/// <param name="sql">sql查询语句</param>
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/// <returns>DataReader对象</returns>
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public static SqlDataReader GetDataReader(string sql)
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{
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SqlCommand cmd = new SqlCommand(sql, Connection);
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SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
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return reader;
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}
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/// <summary>
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/// 执行sql查询，得到一个DataReader对象，以参数方式传值
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/// </summary>
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/// <param name="sql">sql查询语句</param>
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/// <param name="values">参数数组</param>
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/// <returns>DataReader对象</returns>
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public static SqlDataReader GetDataReader(string sql, params SqlParameter[] values)
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{
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SqlCommand cmd = new SqlCommand(sql, Connection);
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cmd.Parameters.AddRange(values);
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SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
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return reader;
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}
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/// <summary>
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/// 执行sql查询，得到一个DataTable对象
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/// </summary>
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/// <param name="sql">sql查询语句</param>
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/// <returns>DataTable</returns>
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public static DataTable GetDataTable(string sql)
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{
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SqlDataAdapter da = new SqlDataAdapter(sql, Connection);
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DataSet ds = new DataSet();
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da.Fill(ds);
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return ds.Tables[0];
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}
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/// <summary>
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/// 执行sql查询，得到一个DataTable对象，以参数方式传值
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/// </summary>
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/// <param name="sql">sql查询语句</param>
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/// <param name="values">参数数组</param>
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/// <returns>DataTable</returns>
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public static DataTable GetDataTable(string sql, params SqlParameter[] values)
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{
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SqlDataAdapter da = new SqlDataAdapter(sql, Connection);
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da.SelectCommand.Parameters.AddRange(values);
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DataSet ds = new DataSet();
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da.Fill(ds);
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return ds.Tables[0];
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}
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/// <summary>
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/// 执行sql查询，得到一个DataSet对象
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/// </summary>
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/// <param name="sql">sql查询语句</param>
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/// <returns>DataSet</returns>
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public static DataSet GetDataSet(string sql)
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{
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SqlDataAdapter da = new SqlDataAdapter(sql, Connection);
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DataSet ds = new DataSet();
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da.Fill(ds);
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return ds;
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}
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/// <summary>
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/// 执行sql查询，得到一个DataSet对象，以参数方式传值
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/// </summary>
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/// <param name="sql">sql查询语句</param>
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/// <param name="values">参数数组</param>
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/// <returns>DataSet</returns>
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public static DataSet GetDataSet(string sql, params SqlParameter[] values)
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{
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SqlDataAdapter da = new SqlDataAdapter(sql, Connection);
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da.SelectCommand.Parameters.AddRange(values);
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DataSet ds = new DataSet();
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da.Fill(ds);
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return ds;
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}
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/// <summary>
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/// 事务
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/// </summary>
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/// <param name="sqlStr"></param>
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/// <returns></returns>
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public static bool ExecuteTrasaction(string sqlStr)
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{
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bool result = true;
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SqlTransaction tran = null;
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try
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{
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tran = Connection.BeginTransaction("Tran");
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SqlCommand cmd = new SqlCommand(sqlStr, Connection, tran);
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cmd.ExecuteNonQuery();
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tran.Commit();
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result = true;
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}
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catch
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{
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tran.Rollback();
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result = false;
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}
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return result;
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}
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/// <summary>
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/// 事务
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/// </summary>
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/// <param name="sqlStr"></param>
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/// <returns></returns>
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public static bool ExecuteTrasaction(List<string> sqlStr)
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{
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bool result = true;
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SqlTransaction tran = null;
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try
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{
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tran = Connection.BeginTransaction("Tran");
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for (int i = 0; i < sqlStr.Count; i++)
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{
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SqlCommand cmd = new SqlCommand(sqlStr[i], Connection, tran);
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cmd.ExecuteNonQuery();
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}
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tran.Commit();
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result = true;
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}
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catch
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{
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tran.Rollback();
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result = false;
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}
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return result;
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}
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/// <summary>
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/// 拆箱获得int
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static int GetInt(object obj)
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{
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return (int)obj;
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}
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/// <summary>
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/// 拆箱获得float
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static float GetFloat(object obj)
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{
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return (float)obj;
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}
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/// <summary>
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/// 拆箱获得double
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static double GetDouble(object obj)
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{
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return (double)obj;
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}
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/// <summary>
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/// 拆箱获得long
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static long GetLong(object obj)
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{
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return (long)obj;
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}
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/// <summary>
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/// 拆箱获得decimal
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static decimal GetDecimal(object obj)
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{
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return (decimal)obj;
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}
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/// <summary>
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/// 拆箱获得bool
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static bool GetBoolean(object obj)
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{
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return (bool)obj;
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}
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/// <summary>
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/// 拆箱获得DateTime
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static DateTime GetDateTime(object obj)
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{
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return (DateTime)obj;
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}
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/// <summary>
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/// 拆箱获得string
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static string GetString(object obj)
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{
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return obj + "";
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}
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public static DateTime SystemDate()
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{
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string sqlStr = "select getdate() as SysDate";
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DataTable dt = GetDataTable(sqlStr);
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return DateTime.Parse(DateTime.Parse(dt.Rows[0]["SysDate"].ToString()).ToString("yyyy-MM-dd HH:mm:ss"));
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}
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}
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}
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