本文整理汇总了VB.NET中System.Windows.Forms.Control.OnDoubleClick方法的典型用法代码示例。如果您正苦于以下问题：VB.NET Control.OnDoubleClick方法的具体用法？VB.NET Control.OnDoubleClick怎么用？VB.NET Control.OnDoubleClick使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。
在下文中一共展示了Control.OnDoubleClick方法的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:
' This example uses the DoubleClick event of a ListBox to load text files
' listed in the ListBox into a TextBox control. This example
' assumes that the ListBox, named listBox1, contains a list of valid file
' names with path and that this event handler method
' is connected to the DoublClick event of a ListBox control named listBox1.
' This example requires code access permission to access files.
Private Sub listBox1_DoubleClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles listBox1.DoubleClick
' Get the name of the file to open from the ListBox.
Dim file As [String] = listBox1.SelectedItem.ToString()
Try
' Determine if the file exists before loading.
If System.IO.File.Exists(file) Then
' Open the file and use a TextReader to read the contents into the TextBox.
Dim myFile As New System.IO.FileInfo(listBox1.SelectedItem.ToString())
Dim myData As System.IO.TextReader = myFile.OpenText()
textBox1.Text = myData.ReadToEnd()
myData.Close()
End If
' Exception is thrown by the OpenText method of the FileInfo class.
Catch
MessageBox.Show("The file you specified does not exist.")
' Exception is thrown by the ReadToEnd method of the TextReader class.
Catch
MessageBox.Show("There was a problem loading the file into the TextBox. Ensure that the file is a valid text file.")
End Try
End Sub