使用反射完成根據名稱動態創建窗體的幾種方法

Dim str As String

        str = "Form2"  '必須是 命名空間+點+窗體類名（這里假設為命名空間為空）

        Dim tempAssembly As [Assembly] = [Assembly].GetExecutingAssembly()

        Dim t As Type = tempAssembly.GetType(str)

        Dim args() As Object = Nothing

        Dim o As Object = System.Activator.CreateInstance(t, args)

        CType(o, Form2).Show()

        'Dim frm2 As Form = CType(tempAssembly.CreateInstance(str), Form)

        'frm2.Show()

‘////////////////方法2使用構造函數的invoke方法創建實例。

        Dim ty() As Type = {} ‘該構造函數沒有參數

        Dim c As ConstructorInfo = t.GetConstructor(ty) ‘獲得沒有參數的構造函數

        Dim args1() As Object = Nothing ‘參數為空

        Dim p As Object = c.Invoke(Nothing) ‘創建實例時參數為空

        CType(p, Form2).Show()

‘方法3 ‘///////////////////////////////////////使用assembly.createinstance方法創建實例

      Dim str As String

        str = "Form2"  '必須是 命名空間+點+窗體類名

        Dim tempAssembly As System.Reflection.Assembly = System.Reflection.Assembly.GetExecutingAssembly()