VB.Net/Database ADO.net/Data Bind to DataGrid — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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(нет различий)
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Версия 19:40, 26 мая 2010
Data binding to a DataGrid
<source lang="vbnet"> Imports System Imports System.Data Imports System.Windows.Forms Imports System.Data.SqlClient 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 "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 Data Adapter Dim da As New SqlDataAdapter(sql, thisConnection) " Create and fill Dataset Dim ds As New DataSet da.Fill(ds, "Employee") " Bind the data table to the data grid DataGrid1.SetDataBinding(ds, "Employee") End Sub
End Class
</source>
Data binding to Data Grid
<source lang="vbnet"> Imports System Imports System.Data Imports System.Data.SqlClient Imports System.Collections Imports System.Windows.Forms Imports System.Resources Public Class MainClass
Shared Sub Main() Dim form1 As Form = new FrmTableDisplay() Application.Run(form1) End Sub
End Class Public Class FrmTableDisplay
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 " fill DataSet1 with data OleDbDataAdapter1.Fill(DataSet1, "Employee") " bind data in Users table in DataSet1 to dataGrid1 dgdEmployee.SetDataBinding(DataSet1, "Employee") End Sub " New " 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 " Dispose Friend WithEvents dgdEmployee As System.Windows.Forms.DataGrid Friend WithEvents OleDbSelectCommand1 As System.Data.OleDb.OleDbCommand Friend WithEvents OleDbInsertCommand1 As System.Data.OleDb.OleDbCommand Friend WithEvents OleDbUpdateCommand1 As System.Data.OleDb.OleDbCommand Friend WithEvents OleDbDeleteCommand1 As System.Data.OleDb.OleDbCommand Friend WithEvents OleDbConnection1 As System.Data.OleDb.OleDbConnection Friend WithEvents OleDbDataAdapter1 As System.Data.OleDb.OleDbDataAdapter Friend WithEvents DataSet1 As System.Data.DataSet " Required by the Windows Form Designer Private components As System.ruponentModel.Container " 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. <System.Diagnostics.DebuggerStepThrough()> _ Private Sub InitializeComponent() Me.dgdEmployee = New System.Windows.Forms.DataGrid() Me.OleDbSelectCommand1 = New System.Data.OleDb.OleDbCommand() Me.OleDbInsertCommand1 = New System.Data.OleDb.OleDbCommand() Me.OleDbUpdateCommand1 = New System.Data.OleDb.OleDbCommand() Me.OleDbDeleteCommand1 = New System.Data.OleDb.OleDbCommand() Me.OleDbConnection1 = New System.Data.OleDb.OleDbConnection() Me.OleDbDataAdapter1 = New System.Data.OleDb.OleDbDataAdapter() Me.DataSet1 = New System.Data.DataSet() CType(Me.dgdEmployee,System.ruponentModel.ISupportInitialize).BeginInit() CType(Me.DataSet1, System.ruponentModel.ISupportInitialize).BeginInit() Me.SuspendLayout() " " dgdEmployee " Me.dgdEmployee.DataMember = "" Me.dgdEmployee.Location = New System.Drawing.Point(8, 8) Me.dgdEmployee.Name = "dgdEmployee" Me.dgdEmployee.Size = New System.Drawing.Size(304, 256) Me.dgdEmployee.TabIndex = 0 " " OleDbSelectCommand1 " Me.OleDbSelectCommand1.rumandText = "SELECT ID, FirstName, LastName FROM Employee" Me.OleDbSelectCommand1.Connection = Me.OleDbConnection1 " " OleDbInsertCommand1 " Me.OleDbInsertCommand1.rumandText = "INSERT INTO Employee(ID, FirstName, LastName)" & _ "VALUES (?, ?, ?)" Me.OleDbInsertCommand1.Connection = Me.OleDbConnection1 Me.OleDbInsertCommand1.Parameters.Add _ (New System.Data.OleDb.OleDbParameter("ID", _ System.Data.OleDb.OleDbType.Numeric, 0, _ System.Data.ParameterDirection.Input, False, _ CType(10, Byte), CType(0, Byte), "ID", _ System.Data.DataRowVersion.Current, Nothing)) Me.OleDbInsertCommand1.Parameters.Add _ (New System.Data.OleDb.OleDbParameter("FirstName", _ System.Data.OleDb.OleDbType.Char, 50, _ System.Data.ParameterDirection.Input, False, _ CType(0, Byte), CType(0, Byte), "FirstName", _ System.Data.DataRowVersion.Current, Nothing)) Me.OleDbInsertCommand1.Parameters.Add _ (New System.Data.OleDb.OleDbParameter("LastName", _ System.Data.OleDb.OleDbType.Char, 50, _ System.Data.ParameterDirection.Input, False, _ CType(0, Byte), CType(0, Byte), "LastName", _ System.Data.DataRowVersion.Current, Nothing)) " " OleDbUpdateCommand1 " Me.OleDbUpdateCommand1.rumandText = _ "UPDATE Employee SET ID = ?, FirstName = ?, " & _ "LastName = ? WHERE (ID = ?)" & _ " AND (FirstName = ?) AND (LastName = ?)" Me.OleDbUpdateCommand1.Connection = Me.OleDbConnection1 Me.OleDbUpdateCommand1.Parameters.Add _ (New System.Data.OleDb.OleDbParameter("ID", _ System.Data.OleDb.OleDbType.Numeric, 0, _ System.Data.ParameterDirection.Input, False, _ CType(10, Byte), CType(0, Byte), "ID", _ System.Data.DataRowVersion.Current, Nothing)) Me.OleDbUpdateCommand1.Parameters.Add _ (New System.Data.OleDb.OleDbParameter("FirstName", _ System.Data.OleDb.OleDbType.Char, 50, _ System.Data.ParameterDirection.Input, False, _ CType(0, Byte), CType(0, Byte), "FirstName", _ System.Data.DataRowVersion.Current, Nothing)) Me.OleDbUpdateCommand1.Parameters.Add _ (New System.Data.OleDb.OleDbParameter("LastName", _ System.Data.OleDb.OleDbType.Char, 50, _ System.Data.ParameterDirection.Input, False, _ CType(0, Byte), CType(0, Byte), "LastName", _ System.Data.DataRowVersion.Current, Nothing)) Me.OleDbUpdateCommand1.Parameters.Add _ (New System.Data.OleDb.OleDbParameter _ ("Original_ID", _ System.Data.OleDb.OleDbType.Numeric, 0, _ System.Data.ParameterDirection.Input, False, _ CType(10, Byte), CType(0, Byte), "ID", _ System.Data.DataRowVersion.Original, Nothing)) Me.OleDbUpdateCommand1.Parameters.Add _ (New System.Data.OleDb.OleDbParameter _ ("Original_FirstName", _ System.Data.OleDb.OleDbType.Char, 50, _ System.Data.ParameterDirection.Input, False, _ CType(0, Byte), CType(0, Byte), "FirstName", _ System.Data.DataRowVersion.Original, Nothing)) Me.OleDbUpdateCommand1.Parameters.Add _ (New System.Data.OleDb.OleDbParameter _ ("Original_LastName", _ System.Data.OleDb.OleDbType.Char, 50, _ System.Data.ParameterDirection.Input, False, _ CType(0, Byte), CType(0, Byte), "LastName", _ System.Data.DataRowVersion.Original, Nothing)) " " OleDbDeleteCommand1 " Me.OleDbDeleteCommand1.rumandText = _ "DELETE FROM Employee WHERE (ID = ?) AND " & _ "(FirstName = ?) AND (LastName = ?)" Me.OleDbDeleteCommand1.Connection = Me.OleDbConnection1 Me.OleDbDeleteCommand1.Parameters.Add _ (New System.Data.OleDb.OleDbParameter("ID", _ System.Data.OleDb.OleDbType.Numeric, 0, _ System.Data.ParameterDirection.Input, False, _ CType(10, Byte), CType(0, Byte), "ID", _ System.Data.DataRowVersion.Original, Nothing)) Me.OleDbDeleteCommand1.Parameters.Add _ (New System.Data.OleDb.OleDbParameter("FirstName", _ System.Data.OleDb.OleDbType.Char, 50, _ System.Data.ParameterDirection.Input, False, _ CType(0, Byte), CType(0, Byte), "FirstName", _ System.Data.DataRowVersion.Original, Nothing)) Me.OleDbDeleteCommand1.Parameters.Add _ (New System.Data.OleDb.OleDbParameter("LastName", _ System.Data.OleDb.OleDbType.Char, 50, _ System.Data.ParameterDirection.Input, False, _ CType(0, Byte), CType(0, Byte), "LastName", _ System.Data.DataRowVersion.Original, Nothing)) " "OleDbConnection1 " Me.OleDbConnection1.ConnectionString = _ "Provider=Microsoft.Jet.OLEDB.4.0;Password="""";" & _ "User ID=Admin;Data Source=Employee.mdb;Mode=Sha" & _ "re Deny None;Extended Properties="""";" & _ "Jet OLEDB:System database="""";Jet OLEDB:Regis" & _ "try Path="""";Jet OLEDB:Database Password="""";" & _ "Jet OLEDB:Engine Type=5;Jet OLEDB:Dat" & _ "abase Locking Mode=1;Jet OLEDB:Global Partial " & _ "Bulk Ops=2;Jet OLEDB:Global Bulk T" & _ "ransactions=1;Jet OLEDB:New Database " & _ "Password="""";Jet OLEDB:Create System Databas" & _ "e=False;Jet OLEDB:Encrypt Database=False;" & _ "Jet OLEDB:Don"t Copy Locale on Compact=" & _ "False;Jet OLEDB:Compact Without Replica " & _ "Repair=False;Jet OLEDB:SFP=False" " " OleDbDataAdapter1 " Me.OleDbDataAdapter1.DeleteCommand = _ Me.OleDbDeleteCommand1 Me.OleDbDataAdapter1.InsertCommand = _ Me.OleDbInsertCommand1 Me.OleDbDataAdapter1.SelectCommand = _ Me.OleDbSelectCommand1 Me.OleDbDataAdapter1.TableMappings.AddRange _ (New System.Data.rumon.DataTableMapping() _ {New System.Data.rumon.DataTableMapping("Table", _ "Employee", New System.Data.rumon.DataColumnMapping() _ {New System.Data.rumon.DataColumnMapping("ID", _ "ID"), New System.Data.rumon.DataColumnMapping _ ("FirstName", "FirstName"), _ New System.Data.rumon.DataColumnMapping("LastName", _ "LastName")})}) Me.OleDbDataAdapter1.UpdateCommand = _ Me.OleDbUpdateCommand1 " " DataSet1 " Me.DataSet1.DataSetName = "NewDataSet" Me.DataSet1.Locale = _ New System.Globalization.CultureInfo("en-US") " " FrmTableDisplay " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(320, 273) Me.Controls.AddRange(New System.Windows.Forms.Control() _ {Me.dgdEmployee}) Me.Name = "FrmTableDisplay" Me.Text = "Table Display" CType(Me.dgdEmployee, System.ruponentModel. _ ISupportInitialize).EndInit() CType(Me.DataSet1, System.ruponentModel. _ ISupportInitialize).EndInit() Me.ResumeLayout(False) End Sub " InitializeComponent
- End Region
End Class
</source>
<A href="http://www.vbex.ru/Code/VBDownload/Employee.zip">Employee.zip( 7 k)</a>
Use Data Grid to update Data
<source lang="vbnet"> Imports System Imports System.Data Imports System.Windows.Forms Imports System.Data.SqlClient 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
</source>