C#數(shù)據(jù)庫(kù)操作的3種典型用法

由于最近和數(shù)據(jù)庫(kù)打交道,需要用C#和SQL Server 2005進(jìn)行操作,就把近段時(shí)間內(nèi)的最常用的操作做個(gè)總結(jié).本人也是第一次用C#操作數(shù)據(jù)庫(kù),所以這三種典型用法對(duì)初學(xué)者還是挺有幫助的.
    以下是我在visual studio 2005上寫(xiě)的一個(gè)類(連的是SQL Server 2005),已經(jīng)過(guò)測(cè)試通過(guò).里面有3個(gè)方法比較典型,在此把源碼貼出:
    using System;
    using System.Collections.Generic;
    using System.Text;
    using System.Data;
    using System.Data.SqlClient;
    namespace DatabaseOperate
    {
     class SqlOperateInfo
     {
     //Suppose your ServerName is "aa",DatabaseName is "bb",UserName is "cc", Password is "dd"
     private string sqlConnectionCommand = "Data Source=aa;Initial Catalog=bb;User ID=cc;Pwd=dd";
     //This table contains two columns:KeywordID int not null,KeywordName varchar(100) not null
     private string dataTableName = "Basic_Keyword_Test";
     private string storedProcedureName = "Sp_InertToBasic_Keyword_Test";
     private string sqlSelectCommand = "Select KeywordID, KeywordName From Basic_Keyword_Test";
     //sqlUpdateCommand could contain "insert" , "delete" , "update" operate
     private string sqlUpdateCommand = "Delete From Basic_Keyword_Test Where KeywordID = 1";
     public void UseSqlReader()
     {
     SqlConnection sqlConnection = new SqlConnection(sqlConnectionCommand);
     SqlCommand sqlCommand = new SqlCommand();
     sqlCommand.CommandType = System.Data.CommandType.Text;
     sqlCommand.Connection = sqlConnection;
     sqlCommand.CommandText = sqlSelectCommand;
     sqlConnection.Open();
     SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
     while(sqlDataReader.Read())
     {
     //Get KeywordID and KeywordName , You can do anything you like. Here I just output them.
     int keywordid = (int)sqlDataReader[0];
     //the same as: int keywordid = (int)sqlDataReader["KeywordID"]
     string keywordName = (string)sqlDataReader[1];
     //the same as: string keywordName = (int)sqlDataReader["KeywordName"]
     Console.WriteLine("KeywordID = " + keywordid + " , KeywordName = " + keywordName);
     }
     sqlDataReader.Close();
     sqlCommand.Dispose();
     sqlConnection.Close();
     }
     public void UseSqlStoredProcedure()
     {
     SqlConnection sqlConnection = new SqlConnection(sqlConnectionCommand);
     SqlCommand sqlCommand = new SqlCommand();
     sqlCommand.CommandType = CommandType.StoredProcedure;
     sqlCommand.Connection = sqlConnection;
     sqlCommand.CommandText = storedProcedureName;
     sqlConnection.Open();
     sqlCommand.ExecuteNonQuery();
     //you can use reader here,too.as long as you modify the sp and let it like select * from ....
     sqlCommand.Dispose();
     sqlConnection.Close();
     }
     public void UseSqlDataSet()
     {
     SqlConnection sqlConnection = new SqlConnection(sqlConnectionCommand);
     SqlCommand sqlCommand = new SqlCommand();
     sqlCommand.CommandType = System.Data.CommandType.Text;
     sqlCommand.Connection = sqlConnection;
     sqlCommand.CommandText = sqlSelectCommand;
     sqlConnection.Open();
     SqlDataAdapter sqlDataAdapter = new SqlDataAdapter();
     sqlDataAdapter.SelectCommand = sqlCommand;
     DataSet dataSet = new DataSet();
     //sqlCommandBuilder is for update the dataset to database
     SqlCommandBuilder sqlCommandBuilder = new SqlCommandBuilder(sqlDataAdapter);
     sqlDataAdapter.Fill(dataSet, dataTableName);
     //Do something to dataset then you can update it to Database.Here I just add a row
     DataRow row = dataSet.Tables[0].NewRow();
     row[0] = 10000;
     row[1] = "new row";
     dataSet.Tables[0].Rows.Add(row);
     sqlDataAdapter.Update(dataSet, dataTableName);
     sqlCommand.Dispose();
     sqlDataAdapter.Dispose();
     sqlConnection.Close();
     }
     }
    }