由於最近和數據庫打交道，需要用C#和SQL Server 2005進行操作,就把近段時間內的最常用的操作做個總結。本人也是第一次用C#操作數據庫，所以這三種典型用法對初學者還是挺有幫助的。
以下是我在visual studio 2005上寫的一個類(連的是SQL Server 2005)，已經過測試通過。裡面有3個方法比較典型，源碼如下:
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();
}
}
}
以上的程序概括了最典型的用法,也是最基本的用法.更多的用法我將會陸續給出,大家有什麼疑問或建議,歡迎來信([email protected])或留言。
