本文介绍了如果在 TabControl 或 Panel 中查找 Control，Form.Controls 将返回 Nothing的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
I converted a project from vb6 to vb.net where I found a given control that was inside a TabControl via the collection Controls as such
Frm.Controls("ControlName")
I checked and the control does exist in the form.
I iterated on all that is inside the Controls Collection and the control is not there, only the TabControl which contains it. Does it mean that in vb.net I have to design a function to do something that vb6 could do?
解决方案
You can use Me.Controls.Find("name", True) to search the form and all its child controlsto find controls with given name. The result is an array containing found controls.
For example:
Dim control = Me.Controls.Find("textbox1", True).FirstOrDefault()
If (control IsNot Nothing) Then
MessageBox.Show(control.Name)
End If
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