【发布时间】：2012-11-04 16:01:06
【问题描述】：
我是 C++-CLI 初学者，我必须熟悉一些简单的东西。 我制作了一个带有 1 个标签和 1 个按钮的表单。 我想通过单击按钮并通过另一个 cpp 类 (changetext.cpp) 中的 void 调用一些文本来更改标签的文本
结构：
Form1.h //只是一个常规的表单代码，末尾有 1 个标签和 1 个按钮处理程序
#pragma once
namespace ms {
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
/// </summary>
public ref class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
//
//TODO: Add the constructor code here
//
}
public:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form1()
{
if (components)
{
delete components;
}
}
public: System::Windows::Forms::Label^ label1;
private: System::Windows::Forms::Button^ button1;
public:
public:
public:
/// <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->label1 = (gcnew System::Windows::Forms::Label());
this->button1 = (gcnew System::Windows::Forms::Button());
this->SuspendLayout();
//
// label1
//
this->label1->AutoSize = true;
this->label1->Location = System::Drawing::Point(313, 140);
this->label1->Name = L"label1";
this->label1->Size = System::Drawing::Size(35, 13);
this->label1->TabIndex = 0;
this->label1->Text = L"label1";
//
// button1
//
this->button1->Location = System::Drawing::Point(101, 117);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(100, 58);
this->button1->TabIndex = 1;
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(467, 262);
this->Controls->Add(this->button1);
this->Controls->Add(this->label1);
this->Name = L"Form1";
this->Text = L"Form1";
this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
this->ResumeLayout(false);
this->PerformLayout();
}
#pragma endregion
public: System::Void Form1_Load(System::Object^ sender, System::EventArgs^ e) {
}
private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {
changetext my = new changetext();
my.changeText();
}
};
}
ms.cpp (main) //只创建表单
// ms.cpp : main project file.
#include "stdafx.h"
#include "Form1.h"
using namespace ms;
[STAThreadAttribute]
int main(array<System::String ^> ^args)
{
// Enabling Windows XP visual effects before any controls are created
Application::EnableVisualStyles();
Application::SetCompatibleTextRenderingDefault(false);
// Create the main window and run it
Application::Run(gcnew Form1());
return 0;
}
changetext.cpp
#include "stdafx.h"
#include "Form1.h"
int number;
void changeText()
{
number = 5;
Form1.label1->Text=number;
}
我在某个地方犯了一个小错误，我猜它与头文件有关，我习惯于用 java 编码，所以头文件还不是我的一杯茶。
【问题讨论】：
-
“Form1”是一个类型名称，而不是引用表单对象的变量，因此可以访问名为“label1”的实例成员。一定要区分类和对象，大多数关于面向对象编程的书都应该是有用的阅读。
-
那么从“Form1.h”调用“label1”的正确方法是什么？
标签： visual-studio-2010 c++-cli