由于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.里面有3個方法比較典型,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);
