SqlConnection 属性只返回那些包含在 ConnectionString 中的设置。 若要连接到本地机器，请将服务器指定为“(local)”。（必须始终指定一个服务器。）...Pooling ‘true’ 当该值为 true 时，系统将从相应池中提取 SQLConnection 对象，或在必要时创建该对象并将其添加到相应池中。...示例 [Visual Basic, C#] 下面的示例创建一个 SqlConnection并设置它的一些属性。...myConnection.Open() End Sub 'CreateSqlConnection [C#] public void CreateSqlConnection() { SqlConnection...myConnection = new SqlConnection(); myConnection.ConnectionString = "Persist Security Info=False
连接字符串 1、连接字符串的写法 在字符串变量中，描述连接字符串所需的服务器地址、数据库名称、集成安全性（即是否使用Windows验证） sqlConnection.ConnectionString =...实例化“连接对象”，并打开连接 SqlConnection sqlConnection = new SqlConnection(); //声明并实例化SQL连接； sqlConnection.ConnectionString...服务器地址：" + sqlConnection.DataSource + "\n服务器版本：" + sqlConnection.ServerVersion...sqlConnection = new SqlConnection(); sqlConnection.ConnectionString = sqlConnectionStringBuilder.ConnectionString...sqlConnection = new SqlConnection();
cn = new SqlConnection(_connectionString)) { cn.Open(); Person p = new Person { Active = true...cn = new SqlConnection(_connectionString)) { cn.Open(); int personId = 1; Person person...= cn.Get(personId); cn.Close(); } 2.3 删除记录 using (SqlConnection cn = new SqlConnection(_...cn = new SqlConnection(_connectionString)) { cn.Open(); int personId = 1; Person person...cn = new SqlConnection(_connectionString)) { cn.Open(); var predicate = Predicates.Field<Person
conn = new SqlConnection(connString); 31 SqlCommand cmd = new SqlCommand(); 32...conn = new SqlConnection(connString); 51 SqlCommand cmd = new SqlCommand(); 52...conn = new SqlConnection(connString)) 71 { 72 SqlCommand cmd = new SqlCommand...conn = new SqlConnection(connString)) 163 { 164 SqlDataAdapter da = new...conn = new SqlConnection(connString)) 188 { 189 SqlDataAdapter da = new
sqlConnection = new SqlConnection(sqlConnectionCommand); SqlCommand sqlCommand = new SqlCommand();...= sqlSelectCommand; sqlConnection.Open(); SqlDataReader sqlDataReader = sqlCommand.ExecuteReader()...sqlConnection = new SqlConnection(sqlConnectionCommand); SqlCommand sqlCommand = new SqlCommand();...sqlCommand.Dispose(); sqlConnection.Close(); } ====================================================...===== public void UseSqlDataSet() { SqlConnection sqlConnection = new SqlConnection(sqlConnectionCommand
private void btn_LogIn_Click(object sender, EventArgs e) { SqlConnection sqlConnection = new SqlConnection...(); //声明并实例化SQL连接； sqlConnection.ConnectionString = "Server=...; sqlConnection.Close(); //关闭SQL连接； ####...SqlConnection sqlConnection = new SqlConnection(); //声明并实例化SQL连接；...sqlConnection.ConnectionString = "Server=(local);Database=EduBaseDemo;Integrated Security
conn = new SqlConnection(connStr)) { conn.Open(); //无参查询...conn = new SqlConnection(connStr)) { string sqlStr = @"select A.Id,A.Title,S.SeoKeywords from Article...conn = new SqlConnection(connStr)) { string sqlStr = @"select Id,Title,Author from Article where...conn = new SqlConnection(connStr)) { conn.Open(); int count = conn.Execute("usp_insertArticle...conn = new SqlConnection(connStr)) { conn.Open(); int count = conn.Execute("usp_updateArticle
SELECT classID, classDate, classPlace, classTeacher, classTitle, durativeDate FROM gch_Class_Info",sqlConnection1...; sqlConnection1 = new SqlConnection(); sqlConnection1.ConnectionString = "server=(local);integrated...; SqlCommand sqlCommand2 = new SqlCommand(); sqlCommand2.Connection = sqlConnection1...; } catch(Exception ex) { MessageBox.Show(ex.ToString()); } } if(sqlConnection1...=null) { sqlConnection1.Close(); sqlConnection1 = null; } //方案三： 通过到入Excel的VBA dll，通过VBA接口获取
;database=DataBaseName;uid=sa;pwd=123456"; //定义数据库连接字符串 SqlConnection conn = new SqlConnection(strConn...需要注意的是：一个SqlConnection连接下只允许打开一个SqlDataReader，此时这个SqlConnection对象只为这一个SqlDataReader服务，如果还想再打开一个SqlDataReader...，则必须先讲前面那个关闭（当然也可以再创建一个SqlConnection对象，了解一下多线程就会明白）。...SqlConnection对象conn，节省系统资源。 ...举例如下： public static DataTable SelectAll() { SqlConnection conn=new SqlConnection("server=
sourceConnection = new SqlConnection(sourceConnectionString)) {...sourceConnection = new SqlConnection(sourceConnectionString)) { sourceConnection.Open...sourceConnection = new SqlConnection(sourceConnectionString)) using (SqlConnection targetConnection...= new SqlConnection(targetConnectionString)) { sourceConnection.Open();...sourceConnection = new SqlConnection(sourceConnectionString)) using (SqlConnection targetConnection
使用Bulk插入单个实体 DapperPlusManager.Entity().Table("Customers"); using (var connection = new SqlConnection...Many ：插入多个实体 DapperPlusManager.Entity().Table("Customers"); using (var connection = new SqlConnection...Update Many DapperPlusManager.Entity().Table("Customers"); using (var connection = new SqlConnection...Merge Single DapperPlusManager.Entity().Table("Customers"); using (var connection = new SqlConnection...4.2 Merge Many DapperPlusManager.Entity().Table("Customers"); using (var connection = new SqlConnection
;database=mag_Web;User ID=sa;password=;" 'Dim myconn As SqlConnection 'myconn = New SqlConnection(connstr...) 'myconn = mydb.GetSqlconn() Dim myconn As SqlConnection = myconnection.GetSqlconn myconn.Open() Dim...;database=mag_Web;User ID=sa;password=;" Dim myconn As SqlConnection = myconnection.GetSqlconn 'myconn...;database=mag_Web;User ID=sa;password=;" Dim myconn As SqlConnection = myconnection.GetSqlconn 'myconn...= New SqlConnection(connstr) 'myconn = mydb.GetSqlconn() myconn.Open() Dim mycommand As New SqlCommand
conn = new SqlConnection(connectionString)) { SqlCommand cmd = new SqlCommand();...conn = new SqlConnection(connectionString)) { SqlCommand cmd = new SqlCommand(...conn = new SqlConnection(connectionString); SqlDataReader dr = null; SqlCommand cmd...conn = new SqlConnection(connectionString)) { SqlDataAdapter da = new SqlDataAdapter...conn = new SqlConnection(str); SqlCommand cmd = new SqlCommand("select * from stu", conn
public static object GetSingleResult(string sql) { SqlConnection...conn = new SqlConnection(connString); SqlCommand cmd = new SqlCommand(sql, conn);...conn = new SqlConnection(connString); SqlCommand cmd = new SqlCommand(sql, conn);...conn = new SqlConnection(connString); SqlCommand cmd = new SqlCommand(sql, conn);...的连接，这里设置 cmd.ExecuteReader(CommandBehavior.CloseConnection)作用是当关闭SqlDataReader的连接时自动关闭SqlConnection
connection = new SqlConnection(ConnectionString)) { SqlCommand sqlCommand...= New SqlConnection(ConnectionString) Dim sqlCommand As SqlCommand = New SqlCommand...connection = new SqlConnection(ConnectionString)) { SqlCommand sqlCommand...= New SqlConnection(ConnectionString) Dim sqlCommand As SqlCommand = New SqlCommand...= New SqlConnection(ConnectionString) Dim sqlCommand As SqlCommand = New SqlCommand
() win.loopMessage(); sqlite支持库绑定命名参数时，可选使用blob,utf8,utf16等名字前缀自定义字符串值存储方式，示例如下： import sqlite var sqlConnection...= sqlite(":memory:") if( not sqlConnection.existsTable("stringTable") ){ sqlConnection.exec( "create...table stringTable(blobString,utf8String,utf16String);") } sqlConnection.prepare("insert into stringTable...string.toUnicode("UTF16编码的字符串"); ) io.open(); for rowid,blobString,utf8String,utf16String in sqlConnection.each
由于这段代码使用了 using 语句，所以 SqlConnection 对象和 TransactionScope 对象都将被自动调用Dispose()释放。...//创建TransactionScope using (TransactionScope tsCope= new TransactionScope()) { using (SqlConnection...cn2005= new SqlConnection(someSql2005)) { SqlCommand cmd= new SqlCommand(sqlUpdate, cn2005); cn2005....Open(); cmd.ExecuteNonQuery(); } using (SqlConnection cn2005= new SqlConnection(anotherSql2005))...cn2005= new SqlConnection(cnString) { SqlCommand cmd= new SqlCommand(updateSql1, cn2005); cn2005.Open
首先来总结一下进行数据库编程的全过程,这里用的是SQL SERVER (1) 建立SqlConnection对象以连接数据库 SqlConnection mysqlconnection=new...SqlConnection("Server=localhost; database=yourdatabase;uid=sa;pwd=sa"); (2) 建立SqlCommand对象 SqlCommand... 设置SqlCommand对象的CommandText属性 mysqlcommand.CommandText="SELECT * FROM youydatabasetablename"; (4) 打开SqlConnection...(9) 关闭SqlConnection对象 mysqlconnection.Close(); 下面把过程呈现出来. 1、在我的程序中用的是SQL,所以在程序头前加上 using System.Data.SqlClient...try { mysqlconnection = new SqlConnection("server=localhost; Integrated Security=True;Database=myfriends
TransactionScope()) { //更新northwind数据库的Employees表 using (SqlConnection... conOne = new SqlConnection("server=.... conTwo = new SqlConnection("server=....代码如下； SqlConnection conNorthwind = new SqlConnection("server=....;uid=sa;pwd=123;database=northwind"); SqlConnection conPubs = new SqlConnection("server=.
Page_Load(Object src,EventArgs e) { stringstrProvider="server=localhost;uid=sa;pwd=;database=aspcn"; SQLConnection...MyConnection=new SQLConnection(strProvider); } 上面我们建立了一个名为MyConnection的联结，就好像我们在ASP中用ADODB.Connection...（呵呵，绵羊可以Connection我也可以) 我们也通过一个小例子来看看他们的用法： SQLConnection myConnection = new SQLConnection(); myConnection.DataSource...MyConnection=new SQLConnection(strProvider); SQLCommand MyCommand = new SQLCommand(strIndex,MyConnection...MyConnection=new SQLConnection(strProvider); SQLCommand MyCommand = new SQLCommand(strIndex,MyConnection
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