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Control.DataBindings Property

Gets the data bindings for the control.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

'Declaration
Public ReadOnly Property DataBindings As ControlBindingsCollection
'Usage
Dim instance As Control 
Dim value As ControlBindingsCollection 

value = instance.DataBindings

Property Value

Type: System.Windows.Forms.ControlBindingsCollection
A ControlBindingsCollection that contains the Binding objects for the control.

Implements

IBindableComponent.DataBindings

Use the DataBindings property to access the ControlBindingsCollection. By adding Binding objects to the collection, you can bind any property of a control to the property of an object.

The following code example adds Binding objects to the ControlBindingsCollection of five controls: four TextBox controls and a DateTimePicker control. The ControlBindingsCollection is accessed through the DataBindings property of the Control class.

Protected Sub BindControls()
    ' Create two Binding objects for the first two TextBox  
    ' controls. The data-bound property for both controls  
    ' is the Text property. The data source is a DataSet  
    ' (ds). The data member is specified by a navigation  
    ' path in the form : TableName.ColumnName. 
    textBox1.DataBindings.Add _
       (New Binding("Text", ds, "customers.custName"))
    textBox2.DataBindings.Add _
       (New Binding("Text", ds, "customers.custID"))

    ' Bind the DateTimePicker control by adding a new Binding.  
    ' The data member of the DateTimePicker is specified by a  
    ' navigation path in the form: TableName.RelationName.ColumnName. 
    DateTimePicker1.DataBindings.Add _
       (New Binding("Value", ds, "customers.CustToOrders.OrderDate"))

    ' Create a new Binding using the DataSet and a  
    ' navigation path(TableName.RelationName.ColumnName). 
    ' Add event delegates for the Parse and Format events to  
    ' the Binding object, and add the object to the third  
    ' TextBox control's BindingsCollection. The delegates  
    ' must be added before adding the Binding to the  
    ' collection; otherwise, no formatting occurs until  
    ' the Current object of the BindingManagerBase for 
    ' the data source changes.  
    Dim b As New Binding("Text", ds, "customers.custToOrders.OrderAmount")
    AddHandler b.Parse, AddressOf CurrencyStringToDecimal
    AddHandler b.Format, AddressOf DecimalToCurrencyString
    textBox3.DataBindings.Add(b)

    ' Bind the fourth TextBox to the Value of the  
    ' DateTimePicker control. This demonstrates how one control 
    ' can be bound to another.
    textBox4.DataBindings.Add("Text", DateTimePicker1, "Value")
    Dim bmText As BindingManagerBase = Me.BindingContext(DateTimePicker1)

    ' Print the Type of the BindingManagerBase, which is  
    ' a PropertyManager because the data source 
    ' returns only a single property value. 
    Console.WriteLine(bmText.GetType().ToString())
    ' Print the count of managed objects, which is 1.
    Console.WriteLine(bmText.Count)

    ' Get the BindingManagerBase for the Customers table. 
    bmCustomers = Me.BindingContext(ds, "Customers")
    ' Print the Type and count of the BindingManagerBase. 
    ' Because the data source inherits from IBindingList, 
    ' it is a RelatedCurrencyManager (derived from CurrencyManager). 
    Console.WriteLine(bmCustomers.GetType().ToString())
    Console.WriteLine(bmCustomers.Count)

    ' Get the BindingManagerBase for the Orders of the current 
    ' customer using a navigation path: TableName.RelationName. 
    bmOrders = Me.BindingContext(ds, "customers.CustToOrders")
End Sub    

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

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