C#用来更新数据库的方式有两种（暂时我知道两种）一种就是sql语句的update，第二种就是我接下来要说的SqlDataAdapter的Update()方法。...运用SqlDataAdapter的Update()方法可以很方便的将对一张数据表进行大量修改。...大致做法如下： 首先定义一个SqlDataAdapter SqlDataAdapter adapter = new SqlDataAdapter(strQuery, conn); 其中StrQuery...kongdelu2009@yeah/blog/static/111995207200932111175638/ 这个SqlCommandBuilder用来自动生成添加、删除、修改的语句，注意这个参数是刚才建立的SqlDataAdapter...然后我们可以调用SqlDataAdapter的Fill()方法，将查询出来的数据表内容填充的一张DataTable里面: thisAdapter.Fill(ds, "TableName"); ds就是dataSet
（连接模式） SqlDataAdapter //基于非连接，适于数据量较大时，可以另行修改，最后再把修改结果返回给数据库。...要求资源也大一点 （断开模式） 二，SqlDataAdapter 读取数据后将数据集放入DataSet ，DataSet 的数据存在本地客服机内存。...SqlDataAdapter返回的是数据集或者表，可以对其中的数据作任意操作 四，写法上不同： SqlDatReader执行前须先打开数据库，然后须生成一个command对象。...conn.close(); SqlDataAdapter 执行时，自动打数据库，且不用Command的ExecuteReader方法进行赋值，完成后自动断开联接。...SqlDataAdapter adptr = new SqlDataAdapter(sql, conn); DataSet ds = new DataSet();
：SqlConnection先打开与数据库的连接，SqlDataAdapter再将从数据库中查询到的数据提取出来保存（通过）到DataSet中（通过SqlDataAdapter的Fill()方法），同时...SqlDataAdapter与DataSet的连接关闭，当DataSet中的数据更新时，SqlDataAdapter再将DataSet中更新后的数据 “搬运” 到数据库中并更新（通过SqlDataAdapter...sda=new SqlDataAdapter(ccmd); SqlDataAdapter对象其实相当于一个功能更强大的SqlCommand对象，SqlDataAdapter...;database=Test;uid=sa;pwd=123456"); //创建数据库连接对象 SqlDataAdapter sda = new SqlDataAdapter();...DataSet长与SqlDataAdapter一同使用，DataSet会将所需数据读取到内存然后断开与SqlDataAdapter的连接，在本地内存进行操作，如需更新时在重新通过SqlDataAdapter
sqlCommand.Connection = sqlConnection; sqlCommand.CommandText = sqlSelectCommand; sqlConnection.Open(); SqlDataAdapter...sqlDataAdapter = new SqlDataAdapter(); sqlDataAdapter.SelectCommand = sqlCommand; DataSet dataSet...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...(dataSet, dataTableName); sqlCommand.Dispose(); sqlDataAdapter.Dispose(); sqlConnection.Close();
db.getSqlConnection()); SqlCommand comm4 = new SqlCommand(sql2, db.getSqlConnection()); SqlDataAdapter...da2 = new SqlDataAdapter(comm2); SqlDataAdapter da3 = new SqlDataAdapter(comm3);...SqlDataAdapter da4 = new SqlDataAdapter(comm3); da2.Fill(ds,"emp"); da3.Fill
'End If For j = 1 To DS1.Tables("handle").Rows.Count - 1 Me.SqlDataAdapter1...InsertCommand.Parameters("@person_id").Value = DS1.Tables("handle").Rows(j).Item(0) Me.SqlDataAdapter1...InsertCommand.Parameters("@information_id").Value = DS1.Tables("handle").Rows(j).Item(1) 'Me.SqlDataAdapter1...InsertCommand.Parameters("@handle").Value = DS1.Tables("handle").Rows(j).Item(2) Me.SqlDataAdapter1....InsertCommand.ExecuteNonQuery() Next 'MessageBox.Show(SqlDataAdapter1.InsertCommand.CommandText
sqltcibd001 = "select * from tcibd001 where tcibd001.item = " + "’" + mpart.Text.Trim() + "’"; SqlDataAdapter...tcibd001f = new SqlDataAdapter(sqltcibd001, connection); DataSet ds = new DataSet(); ...tcibd001fx = new SqlDataAdapter(sqltcibd001x, connection); DataSet dsx = new DataSet...select * from tibom010 where tibom010.mitm = " + "’" + m_part_array[j] + "’"; SqlDataAdapter...tibom010x = new SqlDataAdapter(sqltibom010, connection); tibom010x.Fill(dsx,
SqlConnection(strConnection) Dim cmd As SqlCommand = conn.CreateCommand() Dim adp As SqlDataAdapter...cmdText cmd.CommandType = cmdType cmd.Parameters.AddRange(paras) adp = New SqlDataAdapter...ByVal cmdType As CommandType, ByVal paras As SqlParameter()) As DataTable Dim sqlAdapter As SqlDataAdapter...SqlConnection(strConnection) Dim cmd As SqlCommand = conn.CreateCommand() Dim adp As SqlDataAdapter...As New DataSet cmd.CommandText = cmdText cmd.CommandType = cmdType adp = New SqlDataAdapter
= new SqlConnection(strConnString); conn.Open(); string sql = "Select * FROM Orders"; SqlDataAdapter...ad = new SqlDataAdapter(sql, conn); DataSet ds = new DataSet(); ad.Fill(ds); return...SqlConnection("Data Source=.; Initial Catalog=AdventureWorksDW2008R2; Integrated Security=True"); SqlDataAdapter...da = new SqlDataAdapter("SELECT ProductCategoryKey, EnglishProductCategoryName FROM DimProductCategory
在里面加入一个产生Select命令的函数，用于向sqlDataAdapter传递sql command....} 下面是LoadData函数， 在这个函数里面可以指定自己要选的table 以及列等等参数 里面有2种数据绑定 可以直接用sql command + Sql datareader 也可以sqldataAdapter...to fetch the data SqlDataAdapter sqlDa = new SqlDataAdapter();...the data /* DataSet ds = new DataSet(); SqlDataAdapter...sqlDa = new SqlDataAdapter(); sqlDa.SelectCommand = GenerateSelectCommand("fname
myda = new SqlDataAdapter(cmdstr,myconn);//查出 DataSet myds = new DataSet();//转型 myda.Fill...cmdstr = "select *from Tproduct where Fname='" + Find_TextBox.Text.Trim() + "'";//单引号双引号括起来 SqlDataAdapter...myda = new SqlDataAdapter(cmdstr, myconn); DataSet myds = new DataSet(); myda.Fill(...string cmdstr = "select *from Tproduct where Fname like '%"+Find_TextBox.Text.Trim()+"%'"; SqlDataAdapter...myda = new SqlDataAdapter(cmdstr, myconn); DataSet myds = new DataSet(); myda.Fill(
Public DT As DataTable Public SDA As SqlDataAdapter Private Sub Form1_Load(sender As Object,...conn = New SqlConnection("Server=***;DataBase=userinfo;User ID=***;Password=***") SDA = New SqlDataAdapter...2.SqlDataAdapter：SqlDataAdapter对象名 = new SqlDataAdapter(查询用sql语句,数据库连接); Fill方法向数据表中填充数据。
string sql1 = "select job,count(empno) as total from emp where job='售货员' group by job;"; SqlDataAdapter...sda=new SqlDataAdapter(sql,con); SqlDataAdapter sda1 = new SqlDataAdapter(sql1, con)
SqlCommand("select * from tb_Rectangle select Sum(t_Num) from tb_Rectangle", con); SqlDataAdapter...da = new SqlDataAdapter(); //创建SqlDataAdapter对象 da.SelectCommand
SqlConnection(ConnString); string SQL_Select = “select * from zy”; //构造一个SqlDataAdapter...SqlDataAdapter myAdapter = new SqlDataAdapter(SQL_Select, Conn); //开始读取数据
conn.Open(); string sql = "select Cname from Class where Cterm='" + term + "'"; SqlDataAdapter...adp1 = new SqlDataAdapter(sql, conn); DataSet ds = new DataSet(); adp1.Fill(ds...Class,SC where Student.Sid=SC.Sid and Class.Cid=SC.Cid and Class.Cname='" + classname + "'"; SqlDataAdapter...adp1 = new SqlDataAdapter(sql, conn); DataSet ds = new DataSet(); adp1.Fill(ds
My.Forms.FormStudentSysMain.DBConnstr Dim sqlStr As String = "select * from student " Dim sqlDataAdapter...As New SqlDataAdapter Dim dataSet As New DataSet Dim sqlConnection As New SqlConnection...sqlStr = sqlStr & "where name like '%" & Trim(txtName.Text) & "%'" End If sqlDataAdapter.SelectCommand...= New SqlCommand(sqlStr, sqlConnection) sqlConnection.Open() sqlDataAdapter.Fill(dataSet
= {2}", ip, username, password)); DataTable DBNameTable = new DataTable(); SqlDataAdapter...Adapter = new SqlDataAdapter("select name from master..sysdatabases", Connection); lock
da = new SqlDataAdapter(cmdText, conn); 165 //命令类型为存储过程 166 da.DeleteCommand.CommandType...SqlCommand(); 214 CommandBuilder(cmdText, cmd, conn, parameters); 215 SqlDataAdapter...adapter = new SqlDataAdapter(cmd); 216 DataTable dt = new DataTable(); 217...cmd = new SqlCommand(); 239 CommandBuilder(cmdText, cmd, conn); 240 SqlDataAdapter...adapter = new SqlDataAdapter(cmd); 241 DataTable dt = new DataTable(); 242
那么我们看看如何进行一个离线查询吧 2.实践看看 以SQL Server数据库为例： 获取一个SqlDataAdapter，C#提供了四种方式获取： public SqlDataAdapter ();/.../构造一个没有连接和命令的Adapter对象 public SqlDataAdapter (System.Data.SqlClient.SqlCommand selectCommand);// 指定一个查询命令...public SqlDataAdapter (string selectCommandText, System.Data.SqlClient.SqlConnection selectConnection...);//指定查询命令，和连接 public SqlDataAdapter (string selectCommandText, string selectConnectionString);//指定查询命令和连接字符串...Initial Catalog=Old;Integrated Security=True"; var sql = "select * from Area_PostCode"; var adapter = new SqlDataAdapter
领取专属 10元无门槛券
手把手带您无忧上云
云服务器
ICP备案
对象存储
实时音视频
即时通信 IM
