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Open SQL database by VB .NET – .NET Framework | Microsoft Docs
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- Summary of article content: Articles about Open SQL database by VB .NET – .NET Framework | Microsoft Docs Summary · Requirements · Create Visual Basic . · Create ADO.NET objects · Use the SqlConnection object to open SQL Server connection · Use the … …
- Most searched keywords: Whether you are looking for Open SQL database by VB .NET – .NET Framework | Microsoft Docs Summary · Requirements · Create Visual Basic . · Create ADO.NET objects · Use the SqlConnection object to open SQL Server connection · Use the … Introduces how to open SQL Server databases by using SQL Server .NET Data Provider with Visual Basic .NET.
- Table of Contents:
Summary
Requirements
Create Visual Basic NET Windows application
Create ADONET objects
Use the SqlConnection object to open SQL Server connection
Use the SqlDataReader object to retrieve data from SQL Server
View database in Server Explorer
Use Server Explorer to open SQL Server connection
References
Quản lý sinh viên sử dụng vb.net + sql server – Codefly.Vn
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Hướng dẫn cơ bản thêm, xóa, sửa, tìm kiếm trong Sqlserver với VB.NET
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- Summary of article content: Articles about Hướng dẫn cơ bản thêm, xóa, sửa, tìm kiếm trong Sqlserver với VB.NET NET , muốn nhờ mình viết một ứng dụng kết nối cơ sở dữ liệu mssql, thêm, xóa, sửa, tìm kiếm trên … Tiếp đến: ta khai báo một biến kết nối sql với vb “con”. …
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vb net mssql
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VB.Net – Database Access
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- Summary of article content: Articles about VB.Net – Database Access Data Prover · The .Net Framework data prover for SQL Server – proves access to Microsoft SQL Server. · The .Net Framework data prover for OLE DB – … …
- Most searched keywords: Whether you are looking for VB.Net – Database Access Data Prover · The .Net Framework data prover for SQL Server – proves access to Microsoft SQL Server. · The .Net Framework data prover for OLE DB – … VB.Net – Database Access, 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
- Table of Contents:
ADONet Object Model
Data Provider
DataSet
Connecting to a Database
Example 1
Example 2
Creating Table Columns and Rows
Example 3
Getting data from SQL Server table using VB.Net (Based on http://msdn.microsoft.com/en-us/library/9kcbe65k.aspx?cs-save-lang=1&cs-lang=vb#code-snippet-2) · GitHub
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sql – Using select query in vb.net – Stack Overflow
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- Summary of article content: Articles about sql – Using select query in vb.net – 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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SQL Server Database Programming with Visual Basic.NET: Concepts, Designs and Implementations | Wiley
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SQL Server Database Programming with Visual Basic.NET: Concepts, Designs and Implementations | Wiley SQL Server Database Programming with Visual Basic.NET offers a gue to the fundamental knowledge and practical techniques for the design and creation of … … - Most searched keywords: Whether you are looking for
SQL Server Database Programming with Visual Basic.NET: Concepts, Designs and Implementations | Wiley SQL Server Database Programming with Visual Basic.NET offers a gue to the fundamental knowledge and practical techniques for the design and creation of … A guide to the practical issues and applications in database programming with updated Visual Basic.NET SQL Server Database Programming with Visual Basic.NET offers a guide to the fundamental knowledge and practical techniques for the design and creation of professional database programs that can be used for real-world commercial and industrial applications. The authora noted expert on the topicuses the most current version of Visual Basic.NET, Visual Basic.NET 2017 with Visual Studio.NET 2017. In addition, he introduces the updated SQL Server database and Microsoft SQL Server 2017 Express. All sample program projects can be run in the most updated version, Visual Basic.NET 2019 with Visual Studio.NET 2019. Written in an accessible, down-to-earth style, the author explains how to build a sample database using the SQL Server management system and Microsoft SQL Server Management Studio 2018. The latest version of ASP.NET, ASP.NET 4.7, is also discussed to provide the most up-to-date Web database programming technologies. This important book: Offers illustrative practical examples and detailed descriptions to aid in comprehension of the material presented Includes both fundamental and advanced database programming techniques Integrates images into associated database tables using a DevExpress UI tools -WindowsUI Written for graduate and senior undergraduate students studying database implementations and programming courses, SQL Server Database Programming with Visual Basic.NET shows how to develop professional and practical database programs in Visual Basic.NET 2017/Visual Basic.NET 2019. - Table of Contents:
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Open SQL database by VB .NET – .NET Framework
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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.
Hướng dẫn cơ bản thêm, xóa, sửa, tìm kiếm trong Sqlserver với VB.NET
Hôm nay, theo yêu cầu của một số bạn mới học VB.NET , muốn nhờ mình viết một ứng dụng kết nối cơ sở dữ liệu mssql, thêm, xóa, sửa, tìm kiếm trên vb.net. Mình sẽ hướng dẫn các bạn chi tiết CRUD (thêm, xóa, sửa) với VB. Mình sẽ demo cho các bạn ứng dụng như hình bên dưới:
Đầu tiên: chúng ta cần tạo một datadase “sinhvien” với table_name “tbl_sinhvien” như hình bên dưới:
Đầu tiên các bạn imports thư viên MSSQL vào:
Imports System.Data Imports System.Data.SqlClient
– Tiếp đến: ta khai báo một biến kết nối sql với vb “con”
Dim con As New SqlConnection
– Viết một sub để tạo kết nối
Public Sub Taoketnoi() Dim str As String = “Data Source=.;Initial Catalog=sinhvien;Integrated Security=True” con.ConnectionString = str con.Open() End Sub
Trong đó: data source = . (. = (local)), Catalog=sinhvien (sinhvien chính là tên database của bạn)
– Tiếp đến ta tạo một sub để load dữ liệu vào data gridview
Public Function LayDulieu() As DataTable Dim dt As New DataTable Dim da As New SqlDataAdapter da.SelectCommand = New SqlCommand(“select * from tbl_sinhvien”, con) da.Fill(dt) Return dt End Function
+ Viết sự kiện cho form load
Private Sub CrudDatabase_Load(sender As Object, e As EventArgs) Handles MyBase.Load Taoketnoi() Dim dt As New DataTable dt = LayDulieu() DataGridView1.DataSource = dt txt_masv.DataBindings.Clear() txt_tensv.DataBindings.Clear() txt_diachi.DataBindings.Clear() txt_sodt.DataBindings.Clear() txt_masv.DataBindings.Add(“text”, dt, “masv”) txt_tensv.DataBindings.Add(“text”, dt, “tensv”) txt_diachi.DataBindings.Add(“text”, dt, “diachi”) txt_sodt.DataBindings.Add(“text”, dt, “sodt”) End Sub
+ Viết sự kiện khi click vào nút lưu:
Private Sub btn_luu_Click(sender As Object, e As EventArgs) Handles btn_luu.Click Dim sql As String = “INSERT INTO tbl_sinhvien(masv, tensv, diachi, sodt) VALUES(‘” & txt_masv.Text & “‘,N'” & txt_tensv.Text & “‘,N'” & txt_diachi.Text & “‘,'” & txt_sodt.Text & “‘)” Dim cmd As New SqlCommand(sql, con) cmd.ExecuteNonQuery() ‘Load du lieu Dim dt As New DataTable dt = LayDulieu() DataGridView1.DataSource = dt txt_masv.DataBindings.Clear() txt_tensv.DataBindings.Clear() txt_diachi.DataBindings.Clear() txt_sodt.DataBindings.Clear() txt_masv.DataBindings.Add(“text”, dt, “masv”) txt_tensv.DataBindings.Add(“text”, dt, “tensv”) txt_diachi.DataBindings.Add(“text”, dt, “diachi”) txt_sodt.DataBindings.Add(“text”, dt, “sodt”) End Sub
+ Viết sự kiện khi click vào nút Xóa:
Private Sub btn_xoa_Click(sender As Object, e As EventArgs) Handles btn_xoa.Click Dim masv As String = txt_masv.Text Dim sql As String = “delete from tbl_sinhvien where masv='” & masv & “‘” Dim cmd As New SqlCommand(sql, con) cmd.ExecuteNonQuery() ‘Load du lieu Dim dt As New DataTable dt = LayDulieu() DataGridView1.DataSource = dt txt_masv.DataBindings.Clear() txt_tensv.DataBindings.Clear() txt_diachi.DataBindings.Clear() txt_sodt.DataBindings.Clear() txt_masv.DataBindings.Add(“text”, dt, “masv”) txt_tensv.DataBindings.Add(“text”, dt, “tensv”) txt_diachi.DataBindings.Add(“text”, dt, “diachi”) txt_sodt.DataBindings.Add(“text”, dt, “sodt”) End Sub
+ Viết sự kiện cho nút sửa:
Private Sub btn_sua_Click(sender As Object, e As EventArgs) Handles btn_sua.Click Dim masv As String = txt_masv.Text Dim tensv As String = txt_tensv.Text Dim diachi As String = txt_diachi.Text Dim sodt As String = txt_sodt.Text Dim sql As String = “update tbl_sinhvien set tensv=N'” & tensv & “‘, diachi=N'” & diachi & “‘, sodt='” & sodt & “‘ where masv='” & masv & “‘” Dim cmd As New SqlCommand(sql, con) cmd.ExecuteNonQuery() ‘load du lieu Dim dt As New DataTable dt = LayDulieu() DataGridView1.DataSource = dt txt_masv.DataBindings.Clear() txt_tensv.DataBindings.Clear() txt_diachi.DataBindings.Clear() txt_sodt.DataBindings.Clear() txt_masv.DataBindings.Add(“text”, dt, “masv”) txt_tensv.DataBindings.Add(“text”, dt, “tensv”) txt_diachi.DataBindings.Add(“text”, dt, “diachi”) txt_sodt.DataBindings.Add(“text”, dt, “sodt”) End Sub
+ Viết sự kiện cho txt_timkiem sử dụng sự kiện keyup để tìm kiếm dữ liệu trên data gridview
Private Sub txt_timkiem_KeyUp(sender As Object, e As KeyEventArgs) Handles txt_timkiem.KeyUp Dim sql As String = “select * from tbl_sinhvien where diachi like ‘%” & txt_timkiem.Text & “%'” ‘load du lieu Dim dt As New DataTable Dim da As New SqlDataAdapter da.SelectCommand = New SqlCommand(sql, con) da.Fill(dt) DataGridView1.DataSource = dt txt_masv.DataBindings.Clear() txt_tensv.DataBindings.Clear() txt_diachi.DataBindings.Clear() txt_sodt.DataBindings.Clear() txt_masv.DataBindings.Add(“text”, dt, “masv”) txt_tensv.DataBindings.Add(“text”, dt, “tensv”) txt_diachi.DataBindings.Add(“text”, dt, “diachi”) txt_sodt.DataBindings.Add(“text”, dt, “sodt”) End Sub
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Hướng dẫn cơ bản thêm, xóa, sửa, tìm kiếm trong Sqlserver với VB.NET
Hôm nay, theo yêu cầu của một số bạn mới học VB.NET , muốn nhờ mình viết một ứng dụng kết nối cơ sở dữ liệu mssql, thêm, xóa, sửa, tìm kiếm trên vb.net.
Mình sẽ hướng dẫn các bạn chi tiết CRUD (thêm, xóa, sửa) với VB. Mình sẽ demo cho các bạn ứng dụng như hình bên dưới:
Đầu tiên: chúng ta cần tạo một datadase “sinhvien” với table_name “tbl_sinhvien” như hình bên dưới:
Đầu tiên các bạn imports thư viên MSSQL vào:
Imports System.Data Imports System.Data.SqlClient
– Tiếp đến: ta khai báo một biến kết nối sql với vb “con”
Dim con As New SqlConnection
– Viết một sub để tạo kết nối
Public Sub Taoketnoi() Dim str As String = “Data Source=.;Initial Catalog=sinhvien;Integrated Security=True” con.ConnectionString = str con.Open() End Sub
Trong đó: data source = . (. = (local)), Catalog=sinhvien (sinhvien chính là tên database của bạn)
– Tiếp đến ta tạo một sub để load dữ liệu vào data gridview
Public Function LayDulieu() As DataTable Dim dt As New DataTable Dim da As New SqlDataAdapter da.SelectCommand = New SqlCommand(“select * from tbl_sinhvien”, con) da.Fill(dt) Return dt End Function
+ Viết sự kiện cho form load
Private Sub CrudDatabase_Load(sender As Object, e As EventArgs) Handles MyBase.Load Taoketnoi() Dim dt As New DataTable dt = LayDulieu() DataGridView1.DataSource = dt txt_masv.DataBindings.Clear() txt_tensv.DataBindings.Clear() txt_diachi.DataBindings.Clear() txt_sodt.DataBindings.Clear() txt_masv.DataBindings.Add(“text”, dt, “masv”) txt_tensv.DataBindings.Add(“text”, dt, “tensv”) txt_diachi.DataBindings.Add(“text”, dt, “diachi”) txt_sodt.DataBindings.Add(“text”, dt, “sodt”) End Sub
+ Viết sự kiện khi click vào nút lưu:
Private Sub btn_luu_Click(sender As Object, e As EventArgs) Handles btn_luu.Click Dim sql As String = “INSERT INTO tbl_sinhvien(masv, tensv, diachi, sodt) VALUES(‘” & txt_masv.Text & “‘,N'” & txt_tensv.Text & “‘,N'” & txt_diachi.Text & “‘,'” & txt_sodt.Text & “‘)” Dim cmd As New SqlCommand(sql, con) cmd.ExecuteNonQuery() ‘Load du lieu Dim dt As New DataTable dt = LayDulieu() DataGridView1.DataSource = dt txt_masv.DataBindings.Clear() txt_tensv.DataBindings.Clear() txt_diachi.DataBindings.Clear() txt_sodt.DataBindings.Clear() txt_masv.DataBindings.Add(“text”, dt, “masv”) txt_tensv.DataBindings.Add(“text”, dt, “tensv”) txt_diachi.DataBindings.Add(“text”, dt, “diachi”) txt_sodt.DataBindings.Add(“text”, dt, “sodt”) End Sub
+ Viết sự kiện khi click vào nút Xóa:
Private Sub btn_xoa_Click(sender As Object, e As EventArgs) Handles btn_xoa.Click Dim masv As String = txt_masv.Text Dim sql As String = “delete from tbl_sinhvien where masv='” & masv & “‘” Dim cmd As New SqlCommand(sql, con) cmd.ExecuteNonQuery() ‘Load du lieu Dim dt As New DataTable dt = LayDulieu() DataGridView1.DataSource = dt txt_masv.DataBindings.Clear() txt_tensv.DataBindings.Clear() txt_diachi.DataBindings.Clear() txt_sodt.DataBindings.Clear() txt_masv.DataBindings.Add(“text”, dt, “masv”) txt_tensv.DataBindings.Add(“text”, dt, “tensv”) txt_diachi.DataBindings.Add(“text”, dt, “diachi”) txt_sodt.DataBindings.Add(“text”, dt, “sodt”) End Sub
+ Viết sự kiện cho nút sửa:
Private Sub btn_sua_Click(sender As Object, e As EventArgs) Handles btn_sua.Click Dim masv As String = txt_masv.Text Dim tensv As String = txt_tensv.Text Dim diachi As String = txt_diachi.Text Dim sodt As String = txt_sodt.Text Dim sql As String = “update tbl_sinhvien set tensv=N'” & tensv & “‘, diachi=N'” & diachi & “‘, sodt='” & sodt & “‘ where masv='” & masv & “‘” Dim cmd As New SqlCommand(sql, con) cmd.ExecuteNonQuery() ‘load du lieu Dim dt As New DataTable dt = LayDulieu() DataGridView1.DataSource = dt txt_masv.DataBindings.Clear() txt_tensv.DataBindings.Clear() txt_diachi.DataBindings.Clear() txt_sodt.DataBindings.Clear() txt_masv.DataBindings.Add(“text”, dt, “masv”) txt_tensv.DataBindings.Add(“text”, dt, “tensv”) txt_diachi.DataBindings.Add(“text”, dt, “diachi”) txt_sodt.DataBindings.Add(“text”, dt, “sodt”) End Sub
+ Viết sự kiện cho txt_timkiem sử dụng sự kiện keyup để tìm kiếm dữ liệu trên data gridview
Private Sub txt_timkiem_KeyUp(sender As Object, e As KeyEventArgs) Handles txt_timkiem.KeyUp Dim sql As String = “select * from tbl_sinhvien where diachi like ‘%” & txt_timkiem.Text & “%'” ‘load du lieu Dim dt As New DataTable Dim da As New SqlDataAdapter da.SelectCommand = New SqlCommand(sql, con) da.Fill(dt) DataGridView1.DataSource = dt txt_masv.DataBindings.Clear() txt_tensv.DataBindings.Clear() txt_diachi.DataBindings.Clear() txt_sodt.DataBindings.Clear() txt_masv.DataBindings.Add(“text”, dt, “masv”) txt_tensv.DataBindings.Add(“text”, dt, “tensv”) txt_diachi.DataBindings.Add(“text”, dt, “diachi”) txt_sodt.DataBindings.Add(“text”, dt, “sodt”) End Sub
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