由于最近和数据库打交道,需要用C#和SQL Server 2005进行操作,就把近段时间内的最常用的操作做个总结.本人也是第一次用C#操作数据库,所以这三种典型用法对初学者还是挺有帮助的.
以下是我在visual studio 2005上写的一个类(连的是SQL Server 2005),已经过测试通过.里面有3个方法比较典型,在此把源码贴出: 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" , "0delete" , "0update" 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 0select * 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 0update the dataset to database SqlCommandBuilder sqlCommandBuilder = new SqlCommandBuilder(sqlDataAdapter). sqlDataAdapter.Fill(dataSet, dataTableName).
//Do something to dataset then you can 0update 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).