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這篇文章將為大家詳細(xì)講解有關(guān)VB.NET語(yǔ)法規(guī)則是什么,小編覺得挺實(shí)用的,因此分享給大家做個(gè)參考,希望大家閱讀完這篇文章后可以有所收獲。
列舉了3個(gè)實(shí)例了解語(yǔ)法規(guī)則的規(guī)律。
VB.NET語(yǔ)法規(guī)則實(shí)例1:
同 Integer 類型的變量比較
Public Class CompareForm Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim A As Integer = 10 Dim B As Integer = 20 If A <= B Then MessageBox.Show("提示:A<=B") Else MessageBox.Show("提示:A>B") End If End Sub End Class
VB.NET語(yǔ)法規(guī)則實(shí)例2:
Boolean變量的比較
ublic Class LogicForm Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim a As Boolean = True Dim b As Boolean = False If a And b = True Then ''和If a And b Then相同 MessageBox.Show("提示:a和b都是True ") Else MessageBox.Show("提示:a和b有一個(gè)不是True ") End If End Sub End Class
VB.NET語(yǔ)法規(guī)則實(shí)例3:
同String類型變量比較 String和Integer不同變量的比較
Public Class StrForm Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim str1, str2 As String str1 = "Hello" str2 = "World" MessageBox.Show("提示:" & str1 + " " + str2) ''MessageBox.show(str1 & " " & str2)也可以 End Sub Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click Dim z As Integer Dim x As String = " 100" z = 50 MessageBox.Show(x & z) '' MessageBox.Show(x + z) End Sub End Class
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