ASP.NET----表格使用与数据绑定好用的sqlCommon基类

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Linq;
  4 using System.Web;
  5 using System.Data.SqlClient;
  6 using System.Configuration;
  7 using System.Data;
  8 
  9 namespace TestDataGriv
 10 {
 11     public class sqlCommon
 12     {
 13         private static SqlConnection conn = new SqlConnection();
 14         private static SqlCommand comm = new SqlCommand();
 15 
 16         public sqlCommon()
 17         {
 18 
 19         }
 20 
 21         /// <summary>
 22         /// 打开连接
 23         /// </summary>
 24         private static void openConnection()
 25         {
 26             if (conn.State == ConnectionState.Closed)
 27             {
 28                 try
 29                 {
 30                     conn.ConnectionString = System.Web.Configuration.WebConfigurationManager.ConnectionStrings["connStr"].ConnectionString;
 31                     comm.Connection = conn;
 32                     conn.Open();
 33                 }
 34                 catch (Exception e)
 35                 {
 36                     throw new Exception(e.Message);
 37                 }
 38             }
 39         }
 40         /// <summary>
 41         /// 关闭连接
 42         /// </summary>
 43         private static void closeConnection()
 44         {
 45             if (conn.State == ConnectionState.Open)
 46             {
 47                 conn.Close();
 48             }
 49             conn.Dispose();
 50             comm.Dispose();
 51         }
 52         /// <summary>
 53         /// 执行一条sql语句
 54         /// </summary>
 55         /// <param name="sqlStr">sql语句</param>
 56         public static void ExecuteSql(string sqlStr)
 57         {
 58             try
 59             {
 60                 openConnection();
 61                 comm.CommandType = CommandType.Text;
 62                 comm.CommandText = sqlStr;
 63                 comm.ExecuteNonQuery();
 64             }
 65             catch (Exception e)
 66             {
 67                 throw new Exception(e.Message);
 68             }
 69             finally
 70             {
 71                 closeConnection();
 72             }
 73         }
 74         /// <summary>
 75         /// 返回一个数据集
 76         /// </summary>
 77         /// <param name="sqlStr">sql语句</param>
 78         /// <returns></returns>
 79         public static DataSet dataSet(string sqlStr)
 80         {
 81             SqlDataAdapter da = new SqlDataAdapter();
 82             DataSet ds = new DataSet();
 83             try
 84             {
 85                 openConnection();
 86                 comm.CommandType = CommandType.Text;
 87                 comm.CommandText = sqlStr;
 88                 da.SelectCommand = comm;
 89                 da.Fill(ds);
 90             }
 91             catch (Exception e)
 92             {
 93                 throw new Exception(e.Message);
 94             }
 95             finally
 96             {
 97                 closeConnection();
 98             }
 99             return ds;
100         }
101 
102         /// <summary>
103         /// 返回一个数据视图
104         /// </summary>
105         /// <param name="sqlStr">sql语句</param>
106         /// <returns></returns>
107         public static DataView dataView(string sqlStr)
108         {
109             SqlDataAdapter da = new SqlDataAdapter();
110             DataView dv = new DataView();
111             DataSet ds = new DataSet();
112             try
113             {
114                 openConnection();
115                 comm.CommandType = CommandType.Text;
116                 comm.CommandText = sqlStr;
117                 da.SelectCommand = comm;
118                 da.Fill(ds);
119                 dv = ds.Tables[0].DefaultView;
120             }
121             catch (Exception e)
122             {
123                 throw new Exception(e.Message);
124             }
125             finally
126             {
127                 closeConnection();
128             }
129             return dv;
130         }
131     }
132 }