詳細情報: BC30424:定数は、class、structure、または array 型ではなく、組み込み型または列挙型でなければなりません。
Class_Initialize New 關鍵字 升級建議 請參閱 更新:2007 年 11 月 建構函式 (Constructor) 是建立物件時所執行的方法。建構函式為 Visual Basic 的新增項目,不僅結合了 Visual Basic 6.0 的 New 陳述式 (Statement) 和 Class_Initialize 方法,還可在建立類別 (Class) 執行個體時,提供更多的彈性和控制。
物件初始設定式提供了一個簡單方法,可以呼叫型別的建構函式 (Constructor),然後在單一陳述式中設定部分或所有屬性的值。 編譯器會叫用 (Invoke) 陳述式的適當建構函式:如果沒有引數則叫用預設建構函式,如果傳送了一個或多個引數則叫用參數型建構函式。 然後,指定的屬性會以初始設定式清單中出現的順序進行初始...
Visual Basic has always strived to be the most productive tool for building line-of-business, data-centric applications. Version 9.0 of the language delivered Language Integrated Query (LINQ), first-class XML support, as well as other core features such as nullable types. We are proud to relea...
All metadata references -- references passed to the compilation constructor as well as references specified via #r directives. (Inherited from Compilation) ScriptClass A symbol representing the implicit Script class. This is null if the class is not defined in the compilation. (Inherited from Co...
Visual Basic 中的 Sub New 和Sub Finalize 过程分别用于初始化和销毁对象,它们分别取代 Visual Basic 6.0 及更低版本中使用的 Class_Initialize 和Class_Terminate 方法。 Sub New 创建类时,Sub New 构造函数仅可运行一次。 调用此函数的位置只能是相同类或派生类的另一个构造函数的代码的第一行。 此外,Sub ...
10.3.1. Creating Base Class CommissionEmployee Consider class CommissionEmployee (Fig. 10.4). The Public services of class CommissionEmployee include: ? a constructor (lines 11–20) ? properties FirstName (line 4), LastName (line 5), SocialSecurityNumber (line 6), GrossSales (lines 23–36)...
在Class1.cs文件的开头添加以下代码: C# usingSystem.IO; 将以下代码添加到Main方法中: C# String line;try{//Pass the file path and file name to the StreamReader constructorStreamReader sr =newStreamReader("C:\\Sample.txt");//Read the first line of textline = sr.ReadLine();//Continue to ...
在Class1.cs文件的开头添加以下代码: C# usingSystem.IO; 将以下代码添加到Main方法中: C# String line;try{//Pass the file path and file name to the StreamReader constructorStreamReader sr =newStreamReader("C:\\Sample.txt");//Read the first line of textline = sr.ReadLine();//Continue to ...
Public Class Form1 : Inherits System.Windows.Forms.Form The code above is actually generated in two lines, but to ease readability the two statements have been placed on the same row. When this form is created the constructor is called, and looks like this: Copy Public Sub New() MyBas...