asp.net读取Access数据库。
注：数据库（表名 job id 工作id ,job工作字段）
数据库放在app_data文件中。名称为database.mdb
如果用codesmith生成，选择的数据库连接类型如下图：
项目结构图：
webconfig配置如下：（在configuration中添加）
<connectionStrings>
<add name="ConnectionString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\database.mdb" providerName="System.Data.OleDb"/>
</connectionStrings>
OleDbHelper.cs类：
using System; using System.Collections.Generic; using System.Text; using System.Data; using System.Data.SqlClient; using System.Configuration; using System.Data.OleDb; public class OleDbHelper { //从配置文件中读取连接字符串 private static string ConnectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ToString(); #region 增删改 public static int ExecuteNonQuery(string commandText, CommandType commandType, params OleDbParameter[] commandParameters) { int row = 0; using (OleDbConnection conn = new OleDbConnection(ConnectionString)) { OleDbCommand cmd = new OleDbCommand(); string os = null; PrepareCommand(cmd, commandType, conn, commandText, commandParameters); row = cmd.ExecuteNonQuery(); } return row; } #endregion #region 返回实体集 public static OleDbDataReader ExecuteReader(string commandText, CommandType commandType, params OleDbParameter[] commandParameters) { OleDbDataReader dr = null; OleDbConnection conn = new OleDbConnection(ConnectionString); try { OleDbCommand cmd = new OleDbCommand(); PrepareCommand(cmd, commandType, conn, commandText, commandParameters); dr = cmd.ExecuteReader(CommandBehavior.CloseConnection); } catch { conn.Close(); throw; } return dr; } #endregion #region ExecuteScalar /// <summary> /// 执行Sql Server存储过程 /// 注意：不能执行有out 参数的存储过程 /// </summary> /// <param name="connectionString">连接字符串</param> /// <param name="spName">存储过程名</param> /// <param name="parameterValues">对象参数</param> /// <returns>执行结果对象</returns> public static object ExecuteScalar(string commandText, CommandType commandType,params OleDbParameter[] commandParameters) { OleDbCommand cmd = new OleDbCommand(); using (OleDbConnection conn = new OleDbConnection(ConnectionString)) { PrepareCommand(cmd, commandType, conn, commandText, commandParameters); object val = cmd.ExecuteScalar(); return val; } } #endregion #region Private Method /// <summary> /// 设置一个等待执行的OleDbCommand对象 /// </summary> /// <param name="cmd">OleDbCommand 对象，不允许空对象</param> /// <param name="conn">OleDbConnection 对象，不允许空对象</param> /// <param name="commandText">Sql 语句</param> /// <param name="cmdParms">OleDbParameters 对象,允许为空对象</param> private static void PrepareCommand(OleDbCommand cmd, CommandType commandType, OleDbConnection conn, string commandText, OleDbParameter[] cmdParms) { //打开连接 if (conn.State != ConnectionState.Open) conn.Open(); //设置OleDbCommand对象 cmd.Connection = conn; cmd.CommandText = commandText; cmd.CommandType = commandType; if (cmdParms != null) { foreach (OleDbParameter parm in cmdParms) cmd.Parameters.Add(parm); } } #endregion #region 返回一个表的数据 public static DataSet ExcuteDataSet(string cmdText, params OleDbParameter[] pars) { using (OleDbConnection con = new OleDbConnection(ConnectionString)) { OleDbCommand cmd = new OleDbCommand(); PrepareCommand(cmd, CommandType.Text, con, cmdText, pars); DataSet ds = new DataSet(); using (OleDbDataAdapter da = new OleDbDataAdapter(cmd)) { da.Fill(ds, "Authorities"); return ds; } } } #endregion }
jobs.cs类：
using System; using System.Collections.Generic; using System.Web; namespace WebTestAccess { public class jobs { public jobs() { } public jobs(string job) { this.job = job; } public jobs(int id, string job) { this.id = id; this.job = job; } private int id; public int Id { get { return id; } set { id = value; } } private string job; public string Job { get { return job; } set { job = value; } } } }
jobservice.cs类：
using System; using System.Collections.Generic; using System.Web; using System.Data.OleDb; using System.Configuration; using System.Data; namespace WebTestAccess { public class jobservice { public List<jobs> getjobsall() { List<jobs> jobss = new List<jobs>(); string sql = "select * from jobs"; using(OleDbDataReader dr=OleDbHelper.ExecuteReader(sql,CommandType.Text)) { while(dr.Read()) { jobs job = new jobs( Convert.ToInt32(dr["id"]), dr["job"].ToString() ); jobss.Add(job); } } return jobss; } //id为自增。 public int addjob(jobs job) { int result = -1; string sql = string.Format("insert into jobs(job) values('{0}')",job.Job); OleDbParameter para = new OleDbParameter("@job", job.Job); result = OleDbHelper.ExecuteNonQuery(sql, CommandType.Text, para); return result; } } }