silverlight 5开发【vb版】（8)-checkbox和combobox

最新推荐文章于 2019-03-12 17:19:15 发布

最新推荐文章于 2019-03-12 17:19:15 发布 · 152 阅读

.net&silverlight 专栏收录该内容

58 篇文章

订阅专栏

本文介绍了一个简单的用户界面实现，包括文本输入、按钮点击事件、鼠标移动事件和复选框的选中与取消选中事件，以及如何在文本框输入内容后动态更新下拉框选项。

1、checkbox

选项控件

Checked和Unchecked事件最重要

2、combobox

下拉框控件

最重要的事件是

SelectionChanged 在当前选定项更改时发生

3、代码:

Partial Public Class MainPage
    Inherits UserControl
    Private currentlocation As Point
    Public Sub New()
        InitializeComponent()
    End Sub

    Private Sub Button1_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles Button1.Click
        ComboBox1.Items.Add(TextBox1.Text)
    End Sub

    Private Sub LayoutRoot_MouseMove(sender As System.Object, e As System.Windows.Input.MouseEventArgs) Handles LayoutRoot.MouseMove
        currentlocation = e.GetPosition(LayoutRoot)
        Label2.Content = "现在鼠标的坐标是:(" & currentlocation.X.ToString() & "," & currentlocation.Y.ToString() & ")"
    End Sub

    Private Sub CheckBox1_Checked(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles CheckBox1.Checked
        Label1.Content = "您好，您选中了!"
    End Sub

    Private Sub CheckBox1_Unchecked(sender As System.Object, e As System.Windows.RoutedEventArgs) Handles CheckBox1.Unchecked
        Label1.Content = "您好，您没有选择!"
    End Sub

    Private Sub ComboBox1_SelectionChanged(sender As System.Object, e As System.Windows.Controls.SelectionChangedEventArgs) Handles ComboBox1.SelectionChanged
        Label4.Content = ComboBox1.SelectedValue
    End Sub
End Class

上面这个代码，当在文本框中输入任何内容后，这些内容将做为下拉框的选项之一，也就是说下拉框的选项是动态增加的