VB.Net/Database ADO.net/DataGrid

Bind data into a data grid and do the update

Imports System
Imports System.Collections
Imports System.Data
Imports System.IO
Imports System.Xml.Serialization
Imports System.Xml
Imports System.Windows.Forms
Imports System.Data.SqlClient
Imports System.Data.OleDb
Public Class MainClass
    Shared Sub Main()
        Dim form1 As Form = New Form1
        Application.Run(form1)
    End Sub
End Class




Public Class Form1
    Inherits System.Windows.Forms.Form
#Region " Windows Form Designer generated code "
    Public Sub New()
        MyBase.New()
        "This call is required by the Windows Form Designer.
        InitializeComponent()
        "Add any initialization after the InitializeComponent() call
    End Sub
    "Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.IContainer
    "NOTE: The following procedure is required by the Windows Form Designer
    "It can be modified using the Windows Form Designer.  
    "Do not modify it using the code editor.
    Friend WithEvents dg As System.Windows.Forms.DataGrid
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.dg = New System.Windows.Forms.DataGrid()
        CType(Me.dg, System.ruponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        "
        "dg
        "
        Me.dg.AlternatingBackColor = System.Drawing.Color.LightGray
        Me.dg.BackColor = System.Drawing.Color.DarkGray
        Me.dg.CaptionBackColor = System.Drawing.Color.White
        Me.dg.CaptionFont = New System.Drawing.Font("Verdana", 10.0!)
        Me.dg.CaptionForeColor = System.Drawing.Color.Navy
        Me.dg.CaptionText = "Employee"
        Me.dg.DataMember = ""
        Me.dg.ForeColor = System.Drawing.Color.Black
        Me.dg.GridLineColor = System.Drawing.Color.Black
        Me.dg.GridLineStyle = System.Windows.Forms.DataGridLineStyle.None
        Me.dg.HeaderBackColor = System.Drawing.Color.Silver
        Me.dg.HeaderForeColor = System.Drawing.Color.Black
        Me.dg.LinkColor = System.Drawing.Color.Navy
        Me.dg.Location = New System.Drawing.Point(9, 7)
        Me.dg.Name = "dg"
        Me.dg.ParentRowsBackColor = System.Drawing.Color.White
        Me.dg.ParentRowsForeColor = System.Drawing.Color.Black
        Me.dg.SelectionBackColor = System.Drawing.Color.Navy
        Me.dg.SelectionForeColor = System.Drawing.Color.White
        Me.dg.Size = New System.Drawing.Size(352, 440)
        Me.dg.TabIndex = 1
        "
        "Form1
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(370, 455)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.dg})
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
        Me.MaximizeBox = False
        Me.MinimizeBox = False
        Me.Name = "Form1"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "Employee Editor"
        CType(Me.dg, System.ruponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)
    End Sub
#End Region
    Private da As SqlDataAdapter
    Private ds As DataSet
    Private Sub Form1_Load(ByVal sender As System.Object, _
            ByVal e As System.EventArgs) Handles MyBase.Load
        " Create a Connection object
        Dim dbConn As New SqlConnection("Server=(local)\SQLEXPRESS;Initial Catalog=MyDatabase;Integrated Security=SSPI")

        " Create the data adapter object pointing to the authors table
        da = New SqlDataAdapter( _
              "SELECT ID, FirstName, LastName FROM Employee", dbConn)
        " Fill the DataSet
        ds = New DataSet("Employee")
        da.Fill(ds)
        " Display the records in a DataGrid component
        dg.DataSource = ds.Tables(0)
    End Sub
    Private Sub Form1_Closing(ByVal sender As Object, _
      ByVal e As System.ruponentModel.CancelEventArgs) Handles MyBase.Closing
        " Message box to prompt the save request
        If (MessageBox.Show("Do you want save the changes?", _
                            "Update", _
                            MessageBoxButtons.YesNo) = DialogResult.Yes) Then
            Try
                " Create the insert, delete and update statements automatically
                Dim cb As New SqlCommandBuilder(da)
                " Retrieve just the changed rows
                Dim dsChanges As DataSet = ds.GetChanges()
                If Not dsChanges Is Nothing Then
                    " Update the database
                    da.Update(dsChanges)
                    " Accept the changes within the DataSet
                    ds.AcceptChanges()
                End If
            Catch ex As Exception
                " Error occurs, show the message
                MessageBox.Show(ex.Message)
            End Try
        End If
    End Sub
End Class

Click button to Update DataGrid

Imports System
Imports System.Data
Imports System.Windows.Forms
Imports System.Data.SqlClient
Imports System.IO
public class MainClass
   Shared Sub Main()
      Dim form1 As Form = New Form1
      Application.Run(form1)
   End Sub
End Class
Public Class Form1
   Inherits System.Windows.Forms.Form
   Private cb As SqlCommandBuilder
   Private da As SqlDataAdapter
#Region " Windows Form Designer generated code "
   Public Sub New()
      MyBase.New()
      "This call is required by the Windows Form Designer.
      InitializeComponent()
      "Add any initialization after the InitializeComponent() call
   End Sub
   "Form overrides dispose to clean up the component list.
   Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
      If disposing Then
         If Not (components Is Nothing) Then
            components.Dispose()
         End If
      End If
      MyBase.Dispose(disposing)
   End Sub
   "Required by the Windows Form Designer
   Private components As System.ruponentModel.IContainer
   "NOTE: The following procedure is required by the Windows Form Designer
   "It can be modified using the Windows Form Designer.  
   "Do not modify it using the code editor.
   Friend WithEvents DataGrid1 As System.Windows.Forms.DataGrid
   Friend WithEvents buttonUpdate As System.Windows.Forms.Button
   Friend WithEvents DataSet1 As System.Data.DataSet
   Friend WithEvents SqlCommand1 As System.Data.SqlClient.SqlCommand
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
      Me.DataGrid1 = New System.Windows.Forms.DataGrid
      Me.buttonUpdate = New System.Windows.Forms.Button
      Me.DataSet1 = New System.Data.DataSet
      Me.SqlCommand1 = New System.Data.SqlClient.SqlCommand
      CType(Me.DataGrid1, System.ruponentModel.ISupportInitialize).BeginInit()
      CType(Me.DataSet1, System.ruponentModel.ISupportInitialize).BeginInit()
      Me.SuspendLayout()
      "
      "DataGrid1
      "
      Me.DataGrid1.DataMember = ""
      Me.DataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText
      Me.DataGrid1.Location = New System.Drawing.Point(8, 8)
      Me.DataGrid1.Name = "DataGrid1"
      Me.DataGrid1.Size = New System.Drawing.Size(400, 192)
      Me.DataGrid1.TabIndex = 0
      "
      "buttonUpdate
      "
      Me.buttonUpdate.Location = New System.Drawing.Point(171, 208)
      Me.buttonUpdate.Name = "buttonUpdate"
      Me.buttonUpdate.TabIndex = 1
      Me.buttonUpdate.Text = "Update"
      "
      "DataSet1
      "
      Me.DataSet1.DataSetName = "NewDataSet"
      Me.DataSet1.Locale = New System.Globalization.CultureInfo("en-GB")
      "
      "Form1
      "
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.ClientSize = New System.Drawing.Size(416, 245)
      Me.Controls.Add(Me.buttonUpdate)
      Me.Controls.Add(Me.DataGrid1)
      Me.Name = "Form1"
      Me.Text = "Form1"
      CType(Me.DataGrid1, System.ruponentModel.ISupportInitialize).EndInit()
      CType(Me.DataSet1, System.ruponentModel.ISupportInitialize).EndInit()
      Me.ResumeLayout(False)
   End Sub
#End Region
   Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
      "Create Connection object
      Dim thisConnection As New SqlConnection("server=(local)\SQLEXPRESS;" & _
          "integrated security=sspi;database=MyDatabase")

      " Sql Query
      Dim sql As String = _
         "SELECT * FROM Employee "
      " Create a Command
      SqlCommand1 = New SqlCommand(sql, thisConnection)
      " Create SqlDataAdapter
      da = New SqlDataAdapter
      da.SelectCommand = SqlCommand1
      " Create SqlCommandBuilder object
      cb = New SqlCommandBuilder(da)
      " Fill Dataset
      da.Fill(DataSet1, "Employee")
      " Bind the data to the grid at runtime
      DataGrid1.SetDataBinding(DataSet1, "Employee")
   End Sub
   Private Sub buttonUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles buttonUpdate.Click
      da.Update(DataSet1, "Employee")
   End Sub
End Class

DataGrid: Load data table with data reader

Imports System
Imports System.Data
Imports System.Windows.Forms
Imports System.Data.SqlClient
Imports System.IO
public class MainClass
   Shared Sub Main()
      Dim form1 As Form = New Form1
      Application.Run(form1)
   End Sub
End Class
Public Class Form1
   Inherits System.Windows.Forms.Form
#Region " Windows Form Designer generated code "
   Public Sub New()
      MyBase.New()
      "This call is required by the Windows Form Designer.
      InitializeComponent()
      "Add any initialization after the InitializeComponent() call
   End Sub
   "Form overrides dispose to clean up the component list.
   Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
      If disposing Then
         If Not (components Is Nothing) Then
            components.Dispose()
         End If
      End If
      MyBase.Dispose(disposing)
   End Sub
   "Required by the Windows Form Designer
   Private components As System.ruponentModel.IContainer
   "NOTE: The following procedure is required by the Windows Form Designer
   "It can be modified using the Windows Form Designer.  
   "Do not modify it using the code editor.
   Friend WithEvents DataGrid1 As System.Windows.Forms.DataGrid
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
      Me.DataGrid1 = New System.Windows.Forms.DataGrid
      CType(Me.DataGrid1, System.ruponentModel.ISupportInitialize).BeginInit()
      Me.SuspendLayout()
      "
      "DataGrid1
      "
      Me.DataGrid1.DataMember = ""
      Me.DataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText
      Me.DataGrid1.Location = New System.Drawing.Point(8, 0)
      Me.DataGrid1.Name = "DataGrid1"
      Me.DataGrid1.Size = New System.Drawing.Size(552, 280)
      Me.DataGrid1.TabIndex = 0
      "
      "Form1
      "
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.ClientSize = New System.Drawing.Size(568, 285)
      Me.Controls.Add(Me.DataGrid1)
      Me.Name = "Form1"
      Me.Text = "Form1"
      CType(Me.DataGrid1, System.ruponentModel.ISupportInitialize).EndInit()
      Me.ResumeLayout(False)
   End Sub
#End Region
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        DataGrid1_Navigate(sender, Nothing)
    End Sub
    Private Sub DataGrid1_Navigate(ByVal sender As Object, ByVal ne As System.Windows.Forms.NavigateEventArgs) Handles DataGrid1.Navigate
        " Create Connection object
      Dim thisConnection As New SqlConnection("server=(local)\SQLEXPRESS;" & _
          "integrated security=sspi;database=MyDatabase")
        " Create Command Object
        Dim thisCommand As New SqlCommand _
           ("SELECT * FROM Employee", thisConnection)
        " Create Data Reader
        Dim thisReader As SqlDataReader
        Try
            " Open Connection
            thisConnection.Open()
            " Load data table with data reader
            thisReader = thisCommand.ExecuteReader()
            Dim dt As New DataTable("Employee")
            dt.Load(thisReader)
            " Bind data table to datagrid
            DataGrid1.DataSource = dt
            " Close Reader
            thisReader.Close()
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        Finally
            " Close Connection
            thisConnection.Close()
        End Try
    End Sub
End Class

Load data from database into DataGrid

 Imports System
 Imports System.Drawing
 Imports System.Collections
 Imports System.ruponentModel
 Imports System.Windows.Forms
 Imports System.Data
 Imports System.Data.SqlClient
 
Public Class MainClass
    Shared Sub Main(  )
        Application.Run(New ADOForm1() )
    End Sub
   
End Class
  Public Class ADOForm1
     Inherits System.Windows.Forms.Form
     Private components As System.ruponentModel.Container
     Friend WithEvents EmployeeDataGrid As _
         System.Windows.Forms.DataGrid
     Public Sub New(  )
         InitializeComponent(  )
         Dim connectionString As String ="server=(local)\SQLEXPRESS;" & _
          "integrated security=sspi;database=MyDatabase"

         Dim commandString As String = _
           "Select FirstName, LastName from Employee"
         Dim myDataAdapter As _
         New SqlDataAdapter(commandString, connectionString)
         Dim myDataSet As New DataSet(  )
         myDataAdapter.Fill(myDataSet, "Employee")
         " bind the DataSet to the grid
         EmployeeDataGrid.DataSource = _
             myDataSet.Tables("Employee").DefaultView
     End Sub "New
     Private Sub InitializeComponent(  )
         Me.ruponents = New System.ruponentModel.Container(  )
         Me.EmployeeDataGrid = New System.Windows.Forms.DataGrid(  )
         EmployeeDataGrid.Location = New System.Drawing.Point(48, 24)
         EmployeeDataGrid.Size = New System.Drawing.Size(368, 160)
         EmployeeDataGrid.TabIndex = 0
         Me.Text = "ADOFrm1"
         Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
         Me.ClientSize = New System.Drawing.Size(464, 273)
         Me.Controls.Add(EmployeeDataGrid)
     End Sub 
 End Class

Load result set from "select" command into a DataGrid

 Imports System
 Imports System.Drawing
 Imports System.Collections
 Imports System.ruponentModel
 Imports System.Windows.Forms
 Imports System.Data
 Imports System.Data.SqlClient
 
Public Class MainClass
    Shared Sub Main(  )
        Application.Run(New ADOForm1() )
    End Sub
   
End Class
  Public Class ADOForm1
     Inherits System.Windows.Forms.Form
     Private components As System.ruponentModel.Container
     Private dataGrid1 As System.Windows.Forms.DataGrid
     " private System.Data.ADO.ADOConnection myConnection;
     Private myConnection As System.Data.SqlClient.SqlConnection
     Private myDataSet As System.Data.DataSet
     Private myCommand As System.Data.SqlClient.SqlCommand
     Private myDataAdapter As System.Data.SqlClient.SqlDataAdapter
     Public Sub New(  )
         InitializeComponent(  )
         Dim connectionString As String ="server=(local)\SQLEXPRESS;" & _
          "integrated security=sspi;database=MyDatabase"

         myConnection = _
             New System.Data.SqlClient.SqlConnection(connectionString)
         myConnection.Open(  )
         " create the DataSet and set a property
         myDataSet = New System.Data.DataSet(  )
         myDataSet.CaseSensitive = True
         " create the SqlCommand  object and assign the
         " connection and the select statement
         myCommand = New System.Data.SqlClient.SqlCommand(  )
         myCommand.Connection = myConnection
         myCommand.rumandText = "Select * from Employee"
         " create the myDataAdapter object and pass in the
         " SQL Command object and establish the table mappings
         myDataAdapter = New System.Data.SqlClient.SqlDataAdapter(  )
         myDataAdapter.SelectCommand = myCommand
         myDataAdapter.TableMappings.Add("Table", "Employee")
         " Tell the myDataAdapter object to fill the DataSet
         myDataAdapter.Fill(myDataSet)
         " display it in the grid
         dataGrid1.DataSource = _
             myDataSet.Tables("Employee").DefaultView
     End Sub "New
     Private Sub InitializeComponent(  )
         Me.ruponents = New System.ruponentModel.Container(  )
         Me.dataGrid1 = New System.Windows.Forms.DataGrid(  )
         dataGrid1.Location = New System.Drawing.Point(48, 24)
         dataGrid1.Size = New System.Drawing.Size(368, 160)
         dataGrid1.TabIndex = 0
         Me.Text = "ADOFrm1"
         Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
         Me.ClientSize = New System.Drawing.Size(464, 273)
         Me.Controls.Add(dataGrid1)
     End Sub 
 End Class