如何創建Form的實例？

Question

我試圖創建一個簡單的應用程序使用.NET C++（我來自C＃），但我只是在開始時失敗。我創建了一個WinForms項目，並添加Form2到項目中。編譯器不斷報告Form2不是我的項目的成員。我需要做什麼才能創造Form2的實例呢？

Answer 1

首先確保你的新窗口2使用相同的名稱空間Form1並應用程序的主文件使用。

Answer 2

我創建1種形式加入的按鈕增加了一個第二形式加入form1上爲窗口2一個的#include然後創建這裏from2然後叫顯示的是下面的代碼的實例。

#pragma once 
#include "Form2.h" 

namespace App { 

    using namespace System; 
    using namespace System::ComponentModel; 
    using namespace System::Collections; 
    using namespace System::Windows::Forms; 
    using namespace System::Data; 
    using namespace System::Drawing; 

    /// <summary> 
    /// Summary for Form1 
    /// 
    /// WARNING: If you change the name of this class, you will need to change the 
    ///   'Resource File Name' property for the managed resource compiler tool 
    ///   associated with all .resx files this class depends on. Otherwise, 
    ///   the designers will not be able to interact properly with localized 
    ///   resources associated with this form. 
    /// </summary> 
    public ref class Form1 : public System::Windows::Forms::Form 
    { 
    public: 
     Form1(void) 
     { 
      InitializeComponent(); 
      // 
      //TODO: Add the constructor code here 
      // 
     } 

    protected: 
     /// <summary> 
     /// Clean up any resources being used. 
     /// </summary> 
     ~Form1() 
     { 
      if (components) 
      { 
       delete components; 
      } 
     } 
    private: System::Windows::Forms::Button^ button1; 
    protected: 

    private: 
     /// <summary> 
     /// Required designer variable. 
     /// </summary> 
     System::ComponentModel::Container ^components; 

#pragma region Windows Form Designer generated code 
     /// <summary> 
     /// Required method for Designer support - do not modify 
     /// the contents of this method with the code editor. 
     /// </summary> 
     void InitializeComponent(void) 
     { 
      this->button1 = (gcnew System::Windows::Forms::Button()); 
      this->SuspendLayout(); 
      // 
      // button1 
      // 
      this->button1->Location = System::Drawing::Point(46, 32); 
      this->button1->Name = L"button1"; 
      this->button1->Size = System::Drawing::Size(75, 23); 
      this->button1->TabIndex = 0; 
      this->button1->Text = L"button1"; 
      this->button1->UseVisualStyleBackColor = true; 
      this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click); 
      // 
      // Form1 
      // 
      this->AutoScaleDimensions = System::Drawing::SizeF(6, 13); 
      this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font; 
      this->ClientSize = System::Drawing::Size(284, 262); 
      this->Controls->Add(this->button1); 
      this->Name = L"Form1"; 
      this->Text = L"Form1"; 
      this->ResumeLayout(false); 

     } 
#pragma endregion 
    private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) { 
       Form2^F = gcnew Form2(); 
       F->Show(); 
      } 
    }; 
}