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d여기에서 How to Connect Visual Studio with SQL Server Database Using VB.Net | swift learn – vb net mssql 주제에 대한 세부정보를 참조하세요
This tutorial is how to connect visual studio with SQL Server database using VB.Net connectionString.
Connect SQL Server database with visual studio VB.Net connection name instead of connectionstring.
This tutorial also covers
1. How to create database in sql server.
2. How to create table in the database.
3. How to create a project using Visual Studio to connect with database.
4. How to add server explorer to connect with SQL server database in your project.
To connect SQL Server database with visual studio VB.Net follow these steps.
1. Add server explorer – go to view menu and click on server explorer.
2. Right click on Data Connections and click on Add New Connection. click on arrow in server name dropdown. select your server name.
3. Select your authentication and database. Click on OK.
Now you can get your connectionstring in property window.
Its allowed to connect visual studio with SQL Server database 2005 to 2017, visual studion 2010, visual studion 2015, visual studion 2017 by following this video.
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vb net mssql 주제에 대한 자세한 내용은 여기를 참조하세요.
Open SQL database by VB .NET – .NET Framework
Summary · Requirements · Create Visual Basic . · Create ADO.NET objects · Use the SqlConnection object to open SQL Server connection · Use the …
Source: docs.microsoft.com
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Phần mềm quản lý học tập sinh viên sử dụng csdl sql ngôn ngữ lập trình vb, trong ví dụ mình có hướng dẫn một vài ví dụ nhỏ trên ngôn ngữ java các bạn xem …
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VB.Net – Database Access – Tutorialspoint
Data Prover · The .Net Framework data prover for SQL Server – proves access to Microsoft SQL Server. · The .Net Framework data prover for OLE DB – …
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Using select query in vb.net – sql – Stack Overflow
This is the way it is done in ADO.net. You will need at the top of your file. Imports System.Data.SqlClient. Something is wrong with this …
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Hướng dẫn kết nối MYSQL với VB.NET
Do nhiều lúc bạn cũng phải cần kết nối VB với Mysql để lấy cơ sở dữ liệu, … Text Dim sql = “INSERT INTO tbl_sinhvien(masv, tensv, …
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ADO.NET SQL Server Connection – Net-informations.com
You can connect your VB.Net application to data in a SQL Server database using the Microsoft .NET Framework Data Prover for SQL Server. The first step in a VB …
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Tự Học VB.NET Và SQL SERVER 2008 – Tiki
Tự Học VB.NET Và SQL SERVER 2008 giá cực tốt, hoàn tiền 111% nếu hàng giả, nhiều mã giảm giá hôm nay, freeship, giao nhanh 2h. Mua ngay!
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Mã hóa chuỗi kết nối VB.net + Sql Server | Giải Pháp Excel
Để người khác có view được file .Exe ( Bằng phần mềm view code VB.net) cũng không thể xem được User+MK SQL server. Em cảm ơn mọi người.
Source: www.giaiphapexcel.com
Date Published: 10/19/2021
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주제와 관련된 이미지 vb net mssql
주제와 관련된 더 많은 사진을 참조하십시오 How to Connect Visual Studio with SQL Server Database Using VB.Net | swift learn. 댓글에서 더 많은 관련 이미지를 보거나 필요한 경우 더 많은 관련 기사를 볼 수 있습니다.
주제에 대한 기사 평가 vb net mssql
- Author: Swift Learn
- Views: 조회수 21,994회
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- Date Published: 2020. 6. 30.
- Video Url link: https://www.youtube.com/watch?v=FNSXQxo7Zeo
Open SQL database by VB .NET – .NET Framework
Table of contents
Open SQL Server database by using SQL Server .NET Data Provider with Visual Basic .NET
Article
01/25/2022
4 minutes to read
3 contributors
In this article
This article provides information about how to open SQL Server databases by using SQL Server .NET Data Provider with Visual Basic .NET.
Original product version: Visual Basic .NET
Original KB number: 308656
Summary
This article describes how you can use ADO.NET to open a SQL Server database by using the SQL Server .NET data provider. ADO.NET gathers all of the classes that are required for data handling. The System.Data.SqlClient namespace describes a collection of classes that are used to programmatically access a SQL Server data source. You can access ADO classes through the System.Data.OleDb namespace to provide support for OLE DB databases.
In this article, connections are set up both programmatically and using the Visual Studio .NET Server Explorer. The code samples in this article use the SqlConnection , SqlCommand , and SqlDataReader ADO.NET objects.
Requirements
The following list outlines the required hardware, software, network infrastructure, and service packs that you need:
Microsoft SQL Server
Visual Basic .NET
Note SQL Server and Visual Basic .NET must be installed and running on the same computer. In addition, the user must be able to use Windows Integrated Security to connect to SQL Server.
This article assumes that you’re familiar with the following topics:
ADO.NET concepts
SQL Server concepts and Transact-SQL (T-SQL) syntax
Northwind sample database
Create Visual Basic .NET Windows application
Start Visual Studio .NET, and create a new Visual Basic Windows Application project named SQLDataAccess. Open Form1. In the first line of Form1.vb, add a reference to the ADO.NET namespace as follows: Imports System.Data.SqlClient From the Windows Start menu, point to Programs, point to Microsoft SQL Server, and then click SQL Server Service Manager to ensure that the SQL Server service is running on your computer. Set the Server property to the name of your computer, and then set the Services property to MSSQLServer. If the service isn’t running, click Start. Close the SQL Server Service Manager dialog box.
Create ADO.NET objects
Modify the Form1 class as follows:
Public Class Form1 Inherits System.Windows.Forms.Form ‘Create ADO.NET objects. Private myConn As SqlConnection Private myCmd As SqlCommand Private myReader As SqlDataReader Private results As String
The SqlConnection object establishes a database connection, the SqlCommand object runs a query against the database, and the SqlDataReader object retrieves the results of the query.
Use the SqlConnection object to open SQL Server connection
To set up the connection string of the SqlConnection object, add the following code to the Form1_Load event procedure: ‘Create a Connection object. myConn = New SqlConnection(“Initial Catalog=Northwind;” & _ “Data Source=localhost;Integrated Security=SSPI;”) To set up the Command object, which contains the SQL query, add the following code to the Form1_Load event procedure: ‘Create a Command object. myCmd = myConn.CreateCommand myCmd.CommandText = “SELECT FirstName, LastName FROM Employees” ‘Open the connection. myConn.Open()
SqlConnection uses your Windows logon details to connect to the Northwind database on your computer.
Use the SqlDataReader object to retrieve data from SQL Server
Add the following code to the Form1_Load event procedure: myReader = myCmd.ExecuteReader() When the myCmd.ExecuteReader method is executed, SqlCommand retrieves two fields from the Employees table and creates a SqlDataReader object. To display the query results, add the following code to the Form1_Load event procedure: ‘Concatenate the query result into a string. Do While myReader.Read() results = results & myReader.GetString(0) & vbTab & _ myReader.GetString(1) & vbLf Loop ‘Display results. MsgBox(results) The myReader.Read method returns a boolean value, which indicates whether there are more records to be read. The results of the SQL query are displayed in a message box. To close the SqlDataReader and SqlConnection objects, add the following code to the Form1_Load event procedure: ‘Close the reader and the database connection. myReader.Close() myConn.Close() Save and run the project.
View database in Server Explorer
On the View menu, click Server Explorer. Right-click Data Connections, and then click Add connection. In the Data Link Properties dialog box, click localhost in the Select or enter a server name box. Click Windows NT Integrated Security to log on to the server. Click Select the database on the server, and then select Northwind database from the list. Click Test Connection to validate the connection, and then click OK. In the Server Explorer, click to expand the Data Connections tree so that the Employees table node expands. The properties of individual fields appear in the Properties window.
Use Server Explorer to open SQL Server connection
View Form1 in Design view. Drag the FirstName and LastName database fields from Employees table in Server Explorer, and drop these fields onto Form1. A SqlConnection and SqlDataAdapter object are created on the form. From the View menu, click Toolbox. On the Data tab, drag a DataSet object (DataSet1), and drop it onto the form. In the Add Dataset dialog box, click Untyped dataset, and then click OK. Insert a line of code before the DataReader and Connection objects are closed in the Form1_Load event procedure. The end of the procedure should appear as follows: SqlDataAdapter1.Fill(DataSet1, “Employees”) myReader.Close() myConn.Close() On the Window Forms tab of the toolbox, drag a DataGrid control, and drop it onto Form1. To bind the DataGrid to the DataSet object that you created earlier, add the following code to the Form1_Load event procedure before the myReader.close() line of code: DataGrid1.SetDataBinding(DataSet1, “Employees”) Save and run the project.
References
For more information about using ADO.NET, refer to the Data section of the Visual Basic topic in the Visual Studio .NET Help documentation.
Quản lý sinh viên sử dụng vb.net + sql server
LƯU Ý
Đây là dự án ý tưởng nên phần code chưa được hoàn thiện đầy đủ, các bạn tải về phát triển thêm với ý tưởng như hình ảnh kết quả demo ở dưới nhé!
Phần mềm quản lý học tập sinh viên sử dụng csdl sql ngôn ngữ lập trình vb, trong ví dụ mình có hướng dẫn một vài ví dụ nhỏ trên ngôn ngữ java các bạn xem rất dễ hiểu
Nhập dữ liệu
Nhập lại
Tìm kiếm sinh viên theo tên hoặc theo điểm học tập
Xóa dữ liệu
Cập nhật dữ liệu
Chuỗi kết nỗi huyền thoại
VB.Net – Database Access
VB.Net – Database Access
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Applications communicate with a database, firstly, to retrieve the data stored there and present it in a user-friendly way, and secondly, to update the database by inserting, modifying and deleting data.
Microsoft ActiveX Data Objects.Net (ADO.Net) is a model, a part of the .Net framework that is used by the .Net applications for retrieving, accessing and updating data.
ADO.Net Object Model
ADO.Net object model is nothing but the structured process flow through various components. The object model can be pictorially described as −
The data residing in a data store or database is retrieved through the data provider. Various components of the data provider retrieve data for the application and update data.
An application accesses data either through a dataset or a data reader.
Datasets store data in a disconnected cache and the application retrieves data from it.
Data readers provide data to the application in a read-only and forward-only mode.
Data Provider
A data provider is used for connecting to a database, executing commands and retrieving data, storing it in a dataset, reading the retrieved data and updating the database.
The data provider in ADO.Net consists of the following four objects −
Sr.No. Objects & Description 1 Connection This component is used to set up a connection with a data source. 2 Command A command is a SQL statement or a stored procedure used to retrieve, insert, delete or modify data in a data source. 3 DataReader Data reader is used to retrieve data from a data source in a read-only and forward-only mode. 4 DataAdapter This is integral to the working of ADO.Net since data is transferred to and from a database through a data adapter. It retrieves data from a database into a dataset and updates the database. When changes are made to the dataset, the changes in the database are actually done by the data adapter.
There are following different types of data providers included in ADO.Net
The .Net Framework data provider for SQL Server – provides access to Microsoft SQL Server.
The .Net Framework data provider for OLE DB – provides access to data sources exposed by using OLE DB.
The .Net Framework data provider for ODBC – provides access to data sources exposed by ODBC.
The .Net Framework data provider for Oracle – provides access to Oracle data source.
The EntityClient provider – enables accessing data through Entity Data Model (EDM) applications.
DataSet
DataSet is an in-memory representation of data. It is a disconnected, cached set of records that are retrieved from a database. When a connection is established with the database, the data adapter creates a dataset and stores data in it. After the data is retrieved and stored in a dataset, the connection with the database is closed. This is called the ‘disconnected architecture’. The dataset works as a virtual database containing tables, rows, and columns.
The following diagram shows the dataset object model −
The DataSet class is present in the System.Data namespace. The following table describes all the components of DataSet −
Sr.No. Components & Description 1 DataTableCollection It contains all the tables retrieved from the data source. 2 DataRelationCollection It contains relationships and the links between tables in a data set. 3 ExtendedProperties It contains additional information, like the SQL statement for retrieving data, time of retrieval, etc. 4 DataTable It represents a table in the DataTableCollection of a dataset. It consists of the DataRow and DataColumn objects. The DataTable objects are case-sensitive. 5 DataRelation It represents a relationship in the DataRelationshipCollection of the dataset. It is used to relate two DataTable objects to each other through the DataColumn objects. 6 DataRowCollection It contains all the rows in a DataTable. 7 DataView It represents a fixed customized view of a DataTable for sorting, filtering, searching, editing and navigation. 8 PrimaryKey It represents the column that uniquely identifies a row in a DataTable. 9 DataRow It represents a row in the DataTable. The DataRow object and its properties and methods are used to retrieve, evaluate, insert, delete, and update values in the DataTable. The NewRow method is used to create a new row and the Add method adds a row to the table. 10 DataColumnCollection It represents all the columns in a DataTable. 11 DataColumn It consists of the number of columns that comprise a DataTable.
Connecting to a Database
The .Net Framework provides two types of Connection classes −
SqlConnection − designed for connecting to Microsoft SQL Server.
OleDbConnection − designed for connecting to a wide range of databases, like Microsoft Access and Oracle.
Example 1
We have a table stored in Microsoft SQL Server, named Customers, in a database named testDB. Please consult ‘SQL Server’ tutorial for creating databases and database tables in SQL Server.
Let us connect to this database. Take the following steps −
Select TOOLS → Connect to Database
Select a server name and the database name in the Add Connection dialog box. M
Click on the Test Connection button to check if the connection succeeded.
Add a DataGridView on the form.
Click on the Choose Data Source combo box.
Click on the Add Project Data Source link.
This opens the Data Source Configuration Wizard.
Select Database as the data source type
Choose DataSet as the database model.
Choose the connection already set up.
Save the connection string.
Choose the database object, Customers table in our example, and click the Finish button.
Select the Preview Data link to see the data in the Results grid −
When the application is run using Start button available at the Microsoft Visual Studio tool bar, it will show the following window −
Example 2
In this example, let us access data in a DataGridView control using code. Take the following steps −
Add a DataGridView control and a button in the form.
Change the text of the button control to ‘Fill’.
Double click the button control to add the required code for the Click event of the button, as shown below −
Imports System.Data.SqlClient Public Class Form1 Private Sub Form1_Load(sender As Object, e As EventArgs) _ Handles MyBase.Load ‘TODO: This line of code loads data into the ‘TestDBDataSet.CUSTOMERS’ table. You can move, or remove it, as needed. Me.CUSTOMERSTableAdapter.Fill(Me.TestDBDataSet.CUSTOMERS) ‘ Set the caption bar text of the form. Me.Text = “tutorialspoint.com” End Sub Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Dim connection As SqlConnection = New sqlconnection() connection.ConnectionString = “Data Source=KABIR-DESKTOP; _ Initial Catalog=testDB;Integrated Security=True” connection.Open() Dim adp As SqlDataAdapter = New SqlDataAdapter _ (“select * from Customers”, connection) Dim ds As DataSet = New DataSet() adp.Fill(ds) DataGridView1.DataSource = ds.Tables(0) End Sub End Class
When the above code is executed and run using Start button available at the Microsoft Visual Studio tool bar, it will show the following window −
Clicking the Fill button displays the table on the data grid view control −
Creating Table, Columns and Rows
We have discussed that the DataSet components like DataTable, DataColumn and DataRow allow us to create tables, columns and rows, respectively.
The following example demonstrates the concept −
Example 3
So far, we have used tables and databases already existing in our computer. In this example, we will create a table, add columns, rows and data into it and display the table using a DataGridView object.
Take the following steps −
Add a DataGridView control and a button in the form.
Change the text of the button control to ‘Fill’.
Add the following code in the code editor.
Public Class Form1 Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load ‘ Set the caption bar text of the form. Me.Text = “tutorialspont.com” End Sub Private Function CreateDataSet() As DataSet ‘creating a DataSet object for tables Dim dataset As DataSet = New DataSet() ‘ creating the student table Dim Students As DataTable = CreateStudentTable() dataset.Tables.Add(Students) Return dataset End Function Private Function CreateStudentTable() As DataTable Dim Students As DataTable Students = New DataTable(“Student”) ‘ adding columns AddNewColumn(Students, “System.Int32”, “StudentID”) AddNewColumn(Students, “System.String”, “StudentName”) AddNewColumn(Students, “System.String”, “StudentCity”) ‘ adding rows AddNewRow(Students, 1, “Zara Ali”, “Kolkata”) AddNewRow(Students, 2, “Shreya Sharma”, “Delhi”) AddNewRow(Students, 3, “Rini Mukherjee”, “Hyderabad”) AddNewRow(Students, 4, “Sunil Dubey”, “Bikaner”) AddNewRow(Students, 5, “Rajat Mishra”, “Patna”) Return Students End Function Private Sub AddNewColumn(ByRef table As DataTable, _ ByVal columnType As String, ByVal columnName As String) Dim column As DataColumn = _ table.Columns.Add(columnName, Type.GetType(columnType)) End Sub ‘adding data into the table Private Sub AddNewRow(ByRef table As DataTable, ByRef id As Integer,_ ByRef name As String, ByRef city As String) Dim newrow As DataRow = table.NewRow() newrow(“StudentID”) = id newrow(“StudentName”) = name newrow(“StudentCity”) = city table.Rows.Add(newrow) End Sub Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Dim ds As New DataSet ds = CreateDataSet() DataGridView1.DataSource = ds.Tables(“Student”) End Sub End Class
When the above code is executed and run using Start button available at the Microsoft Visual Studio tool bar, it will show the following window −
Clicking the Fill button displays the table on the data grid view control −
Using select query in vb.net
This is the way it is done in ADO.net. You will need at the top of your file.
Imports System.Data.SqlClient
Something is wrong with this line of the sqlString . You wouldn’t want a space after a period.
join FVMASTER..MasterPartOptions mpo on mpo.Code=odo.OptionCode and mpo.
You should be able to copy and paste the Select statement from SSMS directly to vb.net code.
Separate your data access code from the user interface code. It seems all your parameters are hard coded.
Hướng dẫn kết nối MYSQL với VB.NET
Do nhiều lúc bạn cũng phải cần kết nối VB với Mysql để lấy cơ sở dữ liệu, rồi import vào MSSQL hay Excel … Hôm nay, mình xin viết bài này hướng dẫn các bạn kết nối hệ quản trị cơ sở dữ liệu MySql với VB.NET.
Đầu tiên, để sử dụng được thư viện Mysql trong VB.NET chúng ta cần phải download bộ MySql Connector từ trang chủ của Mysql về.
link download Mysql connector
Sau khi cài đặt xong, chúng ta cần phải import thư viện mysql connector vào : Tại Toolbox => right chọn choose items.. => chọn mysqlCommand, mysqlConnection, mysqlDataAdapter như hình dưới:
Đầu tiên bạn phải imports thư viện mysql vào
Imports MySql.Data Imports MySql.Data.MySqlClient
– Câu lệnh để tạo kết nối mysql với vb.net:
Dim con As New MySqlConnection Public Sub Open_Connection() Dim str As String = “Server=localhost; Userid=root; Password=; Database=sinhvien” con.ConnectionString = str con.Open() End Sub
– Câu lệnh để load dữ liệu mysql vào datagridview:
Public Function Load_Data() As DataTable Dim da As New MySqlDataAdapter(“SELECT * FROM tbl_sinhvien”, con) Dim dt As New DataTable da.Fill(dt) Return dt End Function Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load Open_Connection() Dim dt As New DataTable dt = Load_Data() DataGridView1.DataSource = dt TextBox1.DataBindings.Clear() TextBox1.DataBindings.Add(“text”, dt, “masv”) TextBox2.DataBindings.Clear() TextBox2.DataBindings.Add(“text”, dt, “tensv”) TextBox3.DataBindings.Clear() TextBox3.DataBindings.Add(“text”, dt, “dienthoai”) End Sub
– Câu lệnh thêm dữ liệu vào mysql:
Dim masv As String = TextBox1.Text Dim hoten As String = TextBox2.Text Dim sodt As String = TextBox3.Text Dim sql = “INSERT INTO tbl_sinhvien(masv, tensv, dienthoai) VALUES( & masv & , & hoten & , & sodt & )” Dim cmd As New MySqlCommand(sql, con) cmd.ExecuteNonQuery() con.Close() Open_Connection() Dim dt As New DataTable dt = Load_Data() DataGridView1.DataSource = dt TextBox1.DataBindings.Clear() TextBox1.DataBindings.Add(“text”, dt, “masv”) TextBox2.DataBindings.Clear() TextBox2.DataBindings.Add(“text”, dt, “tensv”) TextBox3.DataBindings.Clear() TextBox3.DataBindings.Add(“text”, dt, “dienthoai”)
– câu lệnh xóa dữ liệu:
Dim masv As String = TextBox1.Text Dim sql = “DELETE from tbl_sinhvien where masv= & masv & ” Dim cmd As New MySqlCommand(sql, con) cmd.ExecuteNonQuery() con.Close() Open_Connection() Dim dt As New DataTable dt = Load_Data() DataGridView1.DataSource = dt TextBox1.DataBindings.Clear() TextBox1.DataBindings.Add(“text”, dt, “masv”) TextBox2.DataBindings.Clear() TextBox2.DataBindings.Add(“text”, dt, “tensv”) TextBox3.DataBindings.Clear() TextBox3.DataBindings.Add(“text”, dt, “dienthoai”)
Chúc các bạn thành công.
Download project mysql connect vb.net
ADO.NET SQL Server Connection
ADO.NET SQL Server Connection
You can connect your VB.Net application to data in a SQL Server database using the Microsoft .NET Framework Data Provider for SQL Server. The first step in a VB.Net application is to create an instance of the Server object and to establish its connection to an instance of SQL Server.
The SqlConnection Object is Handling the part of physical communication between the application and the SQL Server Database. An instance of the SqlConnection class in .NET Framework is supported the Data Provider for SQL Server Database. The SqlConnection instance takes Connection String as argument and pass the value to the Constructor statement. When the connection is established , SQL Commands may be executed, with the help of the Connection Object, to retrieve or manipulate data in the database. Once the Database activities over , Connection should be closed and release the database resources .
Sql Server connection string
connetionString = “Data Source=ServerName;Initial Catalog=DatabaseName; User ID=UserName;Password=Password”
If you have a named instance of SQL Server, you’ll need to add that as well.
“Server=localhost\sqlexpress”
The Close() method in SqlConnection class is used to close the Database Connection. The Close method rolls back any pending transactions and releases the Connection from the SQL Server Database.
A Sample VB.Net Program that connect SQL Server using connection string.
Imports System.Data.SqlClient Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim connetionString As String Dim cnn As SqlConnection connetionString = “Data Source=ServerName;Initial Catalog=DatabaseName;User ID=UserName;Password=Password” cnn = New SqlConnection(connetionString) Try cnn.Open() MsgBox(“Connection Open ! “) cnn.Close() Catch ex As Exception MsgBox(“Can not open connection ! “) End Try End Sub End Class
Connecting to SQL Server using windows authentication
“Server= localhost; Database= employeedetails; Integrated Security=SSPI;”
Trusted Connection from a CE device
connetionString=”Data Source=ServerName; Initial Catalog=DatabaseName;Integrated Security=SSPI; User ID=myDomain\UserName;Password=Password;
This will only work on a CE device
Connect via an IP address
connetionString=”Data Source=IP_ADDRESS,PORT; Network Library=DBMSSOCN; Initial Catalog=DatabaseName; User ID=UserName;Password=Password”
1433 is the default port for SQL Server.
A sample VB.Net program that demonstrate how to execute sql statement and read data from SQL server.
Imports System.Data.SqlClient Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim connetionString As String Dim connection As SqlConnection Dim command As SqlCommand Dim sql As String connetionString = “Data Source=ServerName;Initial Catalog=DatabaseName;User ID=UserName;Password=Password” sql = “Your SQL Statement Here , like Select * from product” connection = New SqlConnection(connetionString) Try connection.Open() command = New SqlCommand(sql, connection) Dim sqlReader As SqlDataReader = command.ExecuteReader() While sqlReader.Read() MsgBox(sqlReader.Item(0) & ” – ” & sqlReader.Item(1) & ” – ” & sqlReader.Item(2)) End While sqlReader.Close() command.Dispose() connection.Close() Catch ex As Exception MsgBox(“Can not open connection ! “) End Try End Sub End Class
A sample VB.Net program that perform Data Manipulation tasks like Insert , Update , Delete etc. also perform by the ExecuteNonQuery() of SqlCommand Object.
Tự Học VB.NET Và SQL SERVER 2008
Trụ sở chính: Tòa nhà Viettel, Số 285, đường Cách Mạng Tháng 8, phường 12, quận 10, Thành phố Hồ Chí Minh
Tiki nhận đặt hàng trực tuyến và giao hàng tận nơi, chưa hỗ trợ mua và nhận hàng trực tiếp tại văn phòng hoặc trung tâm xử lý đơn hàng
Giấy chứng nhận Đăng ký Kinh doanh số 0309532909 do Sở Kế hoạch và Đầu tư Thành phố Hồ Chí Minh cấp lần đầu ngày 06/01/2010 và sửa đổi lần thứ 23 ngày 14/02/2022
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Mã hóa chuỗi kết nối VB.net + Sql Server
Về việc mã hóa chuỗi kết nối: nếu bạn đã xác định sẽ có người mở file .exe của bạn ra xem code thì bạn nên ngừng các hoạt động mã hóa chuỗi kết nối nhé, vì có mã hóa kiểu gì cũng có đoạn code giải mã, họ đọc đoạn giải mã thì biết, suy ra việc bạn mã hóa chỉ tự khiến bạn sinh thêm việc vô ích.
Ở trên có giải pháp là bạn tạo ra 1 dịch vụ (window service) chạy trên máy server, dịch vụ này lắng nghe các máy khách và trả về chuỗi kết nối nếu nhận được thông điệp “command_getCNS” nào đó do bạn tự định nghĩa. Cũng khá thú vị nếu bạn muốn thử cho biết.
Về file App.config: MS có vẻ tạo ra file này với mục đích chỉ đọc (read only). Thường sẽ khó khăn nếu bạn muốn sửa đổi file này lúc ứng dụng đang chạy (run time). Nhưng chả vấn đề gì, bản chất chỉ là việc đọc và ghi file text mà thôi, bạn có thể tự tạo file xml cho riêng bạn, thoải mái đọc ghi.
Kết luận: Bạn cứ việc đặt user SA và password thẳng vào file .exe. Vì user và password rất hiếm khi thay đổi, còn file xml bạn sẽ dùng để chứa mỗi IP của server, khi chạy code bạn sẽ ráp 3 thành phần ấy lại thành chuối kết nối là xong. Bạn chỉ cần nghĩ và làm những điều đơn giản như vậy, nên dùng đầu óc tập trung cho những nghiệp vụ quan trọng khác của phần mềm nhé. Còn tại sao không đặt IP của server vào thẳng trong code mà để ngoài file xml thì bạn chưa cần biết, cứ làm theo y vậy là được.
키워드에 대한 정보 vb net mssql
다음은 Bing에서 vb net mssql 주제에 대한 검색 결과입니다. 필요한 경우 더 읽을 수 있습니다.
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사람들이 주제에 대해 자주 검색하는 키워드 How to Connect Visual Studio with SQL Server Database Using VB.Net | swift learn
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주제에 대한 기사를 시청해 주셔서 감사합니다 How to Connect Visual Studio with SQL Server Database Using VB.Net | swift learn | vb net mssql, 이 기사가 유용하다고 생각되면 공유하십시오, 매우 감사합니다.
