REALBasic - 以编程方式创建控件

发布于 2024-12-10 00:22:13 字数 592 浏览 2 评论 0原文

我试图以编程方式创建一些标签，代码不会返回任何错误，但我在窗口中看不到任何标签。

dim dr As DatabaseRecord
dim sql As String

sql = "SELECT * FROM pack WHERE applicabilita_modello LIKE '%" + versione + "%'"

dim rs As RecordSet = database.SQLSelect(sql)

dim i As Integer = 1
dim test(10) As Label
while not rs.EOF


  test(i) = new Label

  test(i).Text =  rs.Field("descrizione").StringValue
  test(i).Left = me.Left
  test(i).Top = me.Top * i
  test(i).Enabled = true
  test(i).Visible = true

  rs.MoveNext

  i = i + 1

wend

rs.Close

我已经验证记录集包含一些数据，循环工作正常，但没有显示标签，无法理解原因。

感谢您的帮助

原文

i'm tring to create some label programmatically, the code doesn't return any error but i cannot see any label in my window.

dim dr As DatabaseRecord
dim sql As String

sql = "SELECT * FROM pack WHERE applicabilita_modello LIKE '%" + versione + "%'"

dim rs As RecordSet = database.SQLSelect(sql)

dim i As Integer = 1
dim test(10) As Label
while not rs.EOF


  test(i) = new Label

  test(i).Text =  rs.Field("descrizione").StringValue
  test(i).Left = me.Left
  test(i).Top = me.Top * i
  test(i).Enabled = true
  test(i).Visible = true

  rs.MoveNext

  i = i + 1

wend

rs.Close

i've verified that the recordset contain some data, the loop work correctly but no label is shown and cannot understand why.

thanks for any help

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贩梦商人 2024-12-17 00:22:13

在 Real Studio 中运行时创建控件有两种方法。首先是创建一个控制数组。您可以将该控件命名为 MyLabel 并为其指定零索引。那么你的代码将是：

test(i) = new MyLabel

第二个是使用 ContainerControl。该容器将包含一个标签，因为您可以使用 NEW 命令并使用 ContainerControl.EmbedWithin 方法将它们添加到窗口（或其他容器）。

我通常更喜欢 ContainerControl 方法，原因有很多，但主要是因为控制数组使逻辑变得更加复杂。容器的唯一缺点是它需要 Real Studio Professional 或 Real Studio Enterprise。

http://docs.realsoftware.com/index.php/UsersGuide:Chapter_5:Creating_New_Instances_of_Controls_On_The_Fly < /一>

<一href="http://docs.realsoftware.com/index.php/ContainerControl" rel="nofollow">http://docs.realsoftware.com/index.php/ContainerControl

There are two ways to create controls at runtime in Real Studio. The first is to create a control array. You could name the control MyLabel and give it an index of zero. Then your code would be:

test(i) = new MyLabel

The second is to use a ContainerControl. This container would contain a label and because you can add them to your window (or other container) using the NEW command and using the ContainerControl.EmbedWithin method.

I generally prefer the ContainerControl approach for many reasons, but mostly because control arrays make the logic a big more convoluted. The only drawback with containers is that it requires Real Studio Professional or Real Studio Enterprise.

http://docs.realsoftware.com/index.php/UsersGuide:Chapter_5:Creating_New_Instances_of_Controls_On_The_Fly

http://docs.realsoftware.com/index.php/ContainerControl

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