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. NET+EF Connect Oracle 10, 11 development, ODAC installation configuration and use detailed

Oracle Data Access Component (ODAC) Full name: Oracle Access Components Advantages: Because Microsoft will System.Data.OracleClient.dll deprecated in. NET Framework4, and in terms of access efficiency and speed, System.Data.OracleClient.dll Oracle.DataAccess.dll, Microsoft does not have the advantage of Oracle's class library, so I gave up the use of System.Data.OracleClient.dll for many years and replaced it with Odp.net. 1. Installation of ODAC Serv

Create the first ASP. NET core program to connect to a database using Dbfirst mode

Tags: out soft Microsoft File connection IMA package Control PACThe first step: Step Two: Step Three: Fourth step: Enter commands in the console (1)install-package microsoft.entityframeworkcore (2)install-package Microsoft.EntityFrameworkCore.SqlServer (3)install-package Microsoft.EntityFrameworkCore.Tools (4)install-package Microsoft.EntityFrameworkCore.SqlServer.Design Fifth Step: Create a models folder in your project project also use the command to generate the EF context from the d

VS2015 Connect Oracle 11g (. NET self-band using System.Data.OracleClient;)

1, adding referencesSystem.Data.OracleClient2, Connection statementString connectionString;String queryString;connectionString = "Data source=127.0.0.1/orcl; User Id=scott; Password=tiger ";queryString = "SELECT * from TEST";OracleConnection myconnection = new OracleConnection (connectionString);OracleCommand Myoraccommand = Myconnection.createcommand ();Myoraccommand.commandtext = queryString;Myconnection.open ();OracleDataReader MyDataReader = Myoraccommand.executereader ();Mydatareader.read (

C # ASP. NET connect MySQL Database

(); Mysqlconnection Con=Newmysqlconnection (Ser); //string sqlin = "INSERT into Ertong (name2,mima,name) VALUES (name2= '" +txtname2. Text.trim () + "', mima= '" +txtmima. Text.trim () + "'" + ", name= '" +session["name"]. ToString () + "'"; stringSqlin ="INSERT INTO Ertong (Name2,mima,name,beizu) VALUES ('"+ txtname2. Text.trim () +"', '"+ Txtmima. Text.trim () +"'"+", '"+ session["name"]. ToString () +"', '"+txtpassword2. Text.trim () +"')"; Mysqlcommand com=NewMysqlcommand (Sqlin

Cubrid Learn notes 3 net connect a database and use

Connect to the aboveAfter the database is installed, you can also test the statement.Below we write a console program in C #, connect to the database, and read the data.Download the drive NET version of the next Cubrid ADO Provider 9.3.0.0001.zip This can be. After the decompression there is a CUBRID.Data.dllTwo create the console, add a reference to the CUBRID.D

Remotely connect to Oracle using NET Manager tools

One, configure the Oracle port on the serverEnter the NETCA command on the command line to open the related configuration default port number is 1521Second, after configuring the port, use the Telnet tool to debug the port.Enter the Telnet server IP port number at the command lineThird, find the net Manager self-bringing toolCustomizing a service NameConfigure the IP and port number you need to connect to t

ASP. NET MVC uses EF6 code first mode to connect MySQL summary

connection string.2. Inserting data contains garbled characters in Chinese.This question on the Internet, change this configuration to change that configuration. Then the egg will be found after the change. I inserted the Chinese after the use of the MySQL console to view the data garbled, using navicat viewing is normal. So this question is still in the observation, if you have any good solution can leave a message:)3. A few days ago, a friend asked a question, he used Miniprofiler monitor EF

. Net Core 2.0 uses EF to connect to MySQL database

. Onmodelcreating (ModelBuilder); - varEtperson = Modelbuilder.entity"t_persons"); -Etperson.property (e = e.age). IsRequired ();//do not write isrequired, default is nullable -Etperson.property (E =e.gender). IsRequired (); +Etperson.property (e = e.name). Hasmaxlength ( -). IsRequired (); - } + A } at}Where the configuration for database columns is similar to the. NET Framework's EFThen add the following code to the program:

ASP. NET connect Access database for login function

> TR> TD>TD>TD>Asp:buttonID= "Button1"runat= "Server"Text= "Login"Width= "92px"OnClick= "Button1_Click" />TD>TR> Table>Background: Public Partial classLogin:System.Web.UI.Page { Public Static ReadOnly stringCONNSTR1 ="Provider = microsoft.jet.oledb.4.0;D ata source="+ HttpContext.Current.Server.MapPath ("~/app_data/news.mdb");//Connect Databaseprotected voidPage_Load (Objectsender, EventArgs e) { } protected voidButt

. NET connect to SQL SERVER via ODBC

There are two ways to connect to SQL Server via ODBC:One, by loading the SQL Server drive mode;Second, by configuring the DSN name; stringConstr ="driver={sql Server};d atabase="+ databasename+"; server="+ Server address +";the//sql Server driver Constr+="Uid=invuser; pwd=1;"OdbcCommand cmd_s=NewOdbcCommand (sSQL, CONN_ODBC); OdbcDataReader reader_s= Cmd_s.executereader ();//Execute Query intICZ =0; while(Reader_s.read ()) {jlb

Using Plsql to connect Oracle error, sql*net not properly installed and TNS: Unable to resolve the specified connection identifier

1.64-bit Oracle client on 64-bit machine.Then install the PL/SQL Developer, but connect the Oracle old newspaper with this error:Workaround: Install the 32-bit Oracle client on a 64-bit machine. This will make the connection successful.Basis:From the installation point of view, the 32bit platform (operating system and hardware system) only support 32bitORACLE installation;64bit platform supports installation of both 32bitORACLE and 64-bit Oracle2. Rei

. NET programs connect to the Oracle database remotely

The. NET remote connection Oracle database looks pretty simple, but there are still a lot of problems. Let me share the experience of tossing this thing today. There are many ways to access Oracle database, I use OleDbConnection, this is nothing to say, the code is as follows: 1. Connection Code _OleDbConnection = new OleDbConnection(connectionString); _OleDbConnection.Open(); 2. Connection string The connection string for a remote connection can

Plsql installing some Oracle Net versions cannot connect from a path with parentheses

Tags: path install bracket can identify share Ann SQL ONSThe following prompts appear when Plsql is installed:According to the error message prompt, initially thought oarcle because the installation path problem causes the recognition not to be able to identify, later discovered. is the Plsql installation path with parentheses to make such an errorSuch as:Modify the installation path for the Plsql, and select the installation path without parentheses. This error can be resolved.The installation

Ado. NET Connect Oracle

=192.168.121.130) (port=1521)) (CONNECT_DATA= (SERVICE_NAME=ORCL))); Persist Security info=true; User Id=scott; Password=tiger; ";where Oracle database server ip:192.168.121.130Servicename:orclUser name: ScottPassword: Tiger4. View the instance name of Oracle, log in with SYS as DBA, execute the statement select name from V$database;5,c# CodeUsing system;using system.collections.generic;using system.configuration;using Oracle.ManagedDataAccess.Client; Using system.linq;using System.text;n

C # ASP. NET configuration file connect to SQL database

) { //get the connection string in the configuration file stringConstr = configurationmanager.connectionstrings["myconn"]. ToString (); using(SqlConnection con=NewSqlConnection (CONSTR)) { stringSelstr ="select name from user1 where 1=1"; SqlCommand com=NewSqlCommand (Selstr,con); Con. Open (); SqlDataReader SDR=com. ExecuteReader (); while(SDR). Read ()) {LISTBOX1.ITEMS.ADD (sdr[0]. ToString ());

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