此主題會描述如何使用 My.Computer.Ports,顯示 Visual Basic 中可用的電腦序列埠。 為了讓使用者能夠選取要使用的連接埠,序列埠的名稱會放置在ListBox控制項中。 範例 這個範例會對 My.Computer.Ports.SerialPortNames 屬性 (Property) 傳回的所有字串 (String) 執行迴圈 (Loop)。 這些字串都是電腦上可用序列...
您可以使用OpenFileDialog和SaveFileDialog元件提供檔案系統的存取權限。但如果您需要建立自己的檔案對話方塊,Visual Basic 2008 會提供 DirListBox、DriveListBox 和 FileListBox 控制項,做為 Microsoft Visual Basic Compatibility 執行階段程式庫的一部分。 您可以使用下列程序,將 DirListBox、DriveListBox 或 FileListB...
For Each foundFile As String In My.Computer.FileSystem.GetFiles( My.Computer.FileSystem.SpecialDirectories.MyDocuments) listBox1.Items.Add(foundFile) Next 穩固程式設計 下列情形可能會造成例外狀況 (Exception): 因下列其中一項原因而導致路徑無效:它是長度為零的字串、它只包含空白字元、它包含無效的...
Use Excel VBA to Make a Dynamic and Dependent Combo Box We have two columns: Days and Months. We will introduce two combo boxes here. The first box will allow you to pick the category, months or days, and the second will show a list of options. Steps: Go to the Developer tab. Clic...
Method 1 – Using a Named Range in the RowSource of a VBA ListBox Steps Open the Visual Basic Editor by clicking Alt+F11. Create a new UserForm by going to Insert and choosing UserForm. In the toolbox, select the ListBox icon and draw a box inside the UserForm window (named UserForm1...
這個範例會對應用程式的開啟表單執行迴圈,並在 ListBox 控制項中顯示表單的標題。 如需只顯示從目前執行緒直接存取之表單的簡易程式碼,請參閱 OpenForms。 VB 複製 Private Sub GetOpenFormTitles() Dim formTitles As New Collection Try For Each f As Form In My.Application.OpenForms ' Use a thre...
Tutorial: Create a Maze in Visual Basic Visual Studio Asynchronous Programming VS 2010 Visual Basic Language Features Series The videos in this series demonstrate how to use new and existing features found in Visual Basic 10. Presented by Charlie Calvert #1 | How Do I: Use Autoimplemented Prope...
To determine the items that are selected, you can use the Selected property of the list box. The Selected property of a list box is an array of values where each value is either True (if the item is selected) or False (if the item is not selected)....
Hi One and All... Can any body help me how to use a Multicolumn Listbox Control... Your help will be appreciated Thanks in Advance
so that it is always marshaled to the thread that///owns the list box control.////////////privatevoidAddFiles(string[] files,intstartIndex,intcount){while(count-- >0) { listBo Using the Multithreaded Control on a Form The following example shows how the multithreadedDirectorySearchercont...