利用sqlcommandbulider写sql语句

本文介绍了SqlCommandBuilder类的构造函数及核心方法,包括获取自动生成的用于执行删除、插入和更新操作的SqlCommand对象的方法。此外,还提及了可以将生成的命令写入存储过程。

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public SqlCommandBuilder(
  
SqlDataAdapter adapter
);
公共方法GetDeleteCommand

受 .NET Framework 精简版的支持。

获取自动生成的、对数据库执行删除操作所需的 SqlCommand 对象。
  
公共方法GetInsertCommand

受 .NET Framework 精简版的支持。

获取自动生成的、对数据库执行插入操作所需的 SqlCommand 对象。
公共方法GetLifetimeService(从 MarshalByRefObject 继承)检索控制此实例的生存期策略的当前生存期服务对象。
公共方法GetType(从 Object 继承)

受 .NET Framework 精简版的支持。

获取当前实例的 Type
公共方法GetUpdateCommand

受 .NET Framework 精简版的支持。

获取自动生成的、对数据库执行更新操作所需的 SqlCommand 对象。

 

也可以把生成出来的command写到存储过程里面去

主要方法
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(); } }}
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