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VB.NET ControlBindingsCollection类代码示例

本文整理汇总了VB.NET中System.Windows.Forms.ControlBindingsCollection的典型用法代码示例。如果您正苦于以下问题:VB.NET ControlBindingsCollection类的具体用法?VB.NET ControlBindingsCollection怎么用?VB.NET ControlBindingsCollection使用的例子?那么, 这里精选的类代码示例或许可以为您提供帮助。


在下文中一共展示了ControlBindingsCollection类的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的VB.NET代码示例。

示例1: BindControls

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 the navigation path: 
    ' 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 a navigation path:
    ' 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 demonstates how one control
    ' can be data-bound to another.
    textBox4.DataBindings.Add("Text", DateTimePicker1, "Value")
    
    ' Get the BindingManagerBase for the textBox4 Binding.
    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 one.
    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 (a derived class of
    ' 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
开发者ID:VB.NET开发者,项目名称:System.Windows.Forms,代码行数:61,代码来源:ControlBindingsCollection


注:本文中的System.Windows.Forms.ControlBindingsCollection类示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。