在 Visual Studio 中，表达式必须具有带有 Windows 窗体的类类型 C++
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【中文标题】在 Visual Studio 中，表达式必须具有带有 Windows 窗体的类类型 C++【英文标题】：Expression must have a class type C++ with Windows Forms in Visual Studio 【发布时间】：2021-03-08 17:38:37 【问题描述】：我正在创建这个程序，它将充当一个“工具箱”，以帮助在网站上快速完成一些工作。它将是一个带有各种操作按钮的 GUI。在它上面有一个地方可以添加系统的 IP 来执行操作。我有一个按钮，我试图将文件从另一台电脑复制到我目前正在处理的电脑上。但是，当我将代码应用于私有部分时，我收到错误“表达式必须具有类类型”。我不确定我在哪里丢球。
`#pragma once
#include <iostream>
#include <time.h>
#include <string>
#include <string.h>
#include <stdlib.h>
#include <filesystem>
#include <Windows.h>
#define private public
#define class struct
namespace DEMOLICENSESELECTION
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
using namespace System::Threading;
using namespace std;
/// <summary>
/// Summary for MyForm
/// </summary>
public ref class MyForm : public System::Windows::Forms::Form
public:
MyForm(void)
InitializeComponent();
//
//TODO: Add the constructor code here
//
protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~MyForm()
if (components)
delete components;
private: System::Windows::Forms::Label^ label1;
protected:
private: System::Windows::Forms::Button^ button1;
private: System::Windows::Forms::Button^ button2;
private: System::Windows::Forms::Button^ button3;
private: System::Windows::Forms::Button^ button4;
private: System::Windows::Forms::Button^ button5;
private: System::Windows::Forms::Button^ button6;
private: System::Windows::Forms::Button^ button7;
private: System::Windows::Forms::Button^ button8;
private: System::Windows::Forms::Button^ button9;
private: System::Windows::Forms::Button^ button10;
private: System::Windows::Forms::Button^ button11;
private: System::Windows::Forms::Button^ button12;
private: System::Windows::Forms::Button^ button13;
private: System::Windows::Forms::Label^ label2;
private: System::Windows::Forms::MenuStrip^ menuStrip1;
private: System::Windows::Forms::ToolStripMenuItem^ exitToolStripMenuItem;
private: System::Windows::Forms::TextBox^ textBox1;
public:
private: System::ComponentModel::IContainer^ components;
private:
private:
private:
/// <summary>
/// Required designer variable.
/// </summary>
#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->button2 = (gcnew System::Windows::Forms::Button());
this->button3 = (gcnew System::Windows::Forms::Button());
this->button4 = (gcnew System::Windows::Forms::Button());
this->button5 = (gcnew System::Windows::Forms::Button());
this->button6 = (gcnew System::Windows::Forms::Button());
this->button7 = (gcnew System::Windows::Forms::Button());
this->button8 = (gcnew System::Windows::Forms::Button());
this->button9 = (gcnew System::Windows::Forms::Button());
this->button10 = (gcnew System::Windows::Forms::Button());
this->button11 = (gcnew System::Windows::Forms::Button());
this->button12 = (gcnew System::Windows::Forms::Button());
this->button13 = (gcnew System::Windows::Forms::Button());
this->label2 = (gcnew System::Windows::Forms::Label());
this->menuStrip1 = (gcnew System::Windows::Forms::MenuStrip());
this->exitToolStripMenuItem = (gcnew System::Windows::Forms::ToolStripMenuItem());
this->textBox1 = (gcnew System::Windows::Forms::TextBox());
this->menuStrip1->SuspendLayout();
this->SuspendLayout();
//
// label1
//
this->label1->Anchor = static_cast<System::Windows::Forms::AnchorStyles>(((System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Left)
| System::Windows::Forms::AnchorStyles::Right));
this->label1->AutoSize = true;
this->label1->Font = (gcnew System::Drawing::Font(L"Bell MT", 36, static_cast<System::Drawing::FontStyle>((System::Drawing::FontStyle::Bold | System::Drawing::FontStyle::Underline)),
System::Drawing::GraphicsUnit::Point, static_cast<System::Byte>(0)));
this->label1->ForeColor = System::Drawing::Color::White;
this->label1->Location = System::Drawing::Point(135, 24);
this->label1->Name = L"label1";
this->label1->Size = System::Drawing::Size(858, 56);
this->label1->TabIndex = 0;
this->label1->Text = L"Synectics Demo License Selection Tool";
//
// button1
//
this->button1->BackColor = System::Drawing::SystemColors::GrayText;
this->button1->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->button1->ForeColor = System::Drawing::SystemColors::InfoText;
this->button1->Location = System::Drawing::Point(175, 102);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(374, 50);
this->button1->TabIndex = 1;
this->button1->Text = L"Base Core";
this->button1->UseVisualStyleBackColor = false;
this->button1->Click += gcnew System::EventHandler(this, &MyForm::button1_Click);
//
// button2
//
this->button2->BackColor = System::Drawing::SystemColors::GrayText;
this->button2->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->button2->ForeColor = System::Drawing::SystemColors::InfoText;
this->button2->Location = System::Drawing::Point(175, 162);
this->button2->Name = L"button2";
this->button2->Size = System::Drawing::Size(374, 50);
this->button2->TabIndex = 2;
this->button2->Text = L"All Modules";
this->button2->UseVisualStyleBackColor = false;
this->button2->Click += gcnew System::EventHandler(this, &MyForm::button2_Click);
//
// button3
//
this->button3->BackColor = System::Drawing::SystemColors::GrayText;
this->button3->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->button3->ForeColor = System::Drawing::SystemColors::InfoText;
this->button3->Location = System::Drawing::Point(175, 222);
this->button3->Name = L"button3";
this->button3->Size = System::Drawing::Size(374, 50);
this->button3->TabIndex = 3;
this->button3->Text = L"All Integrations";
this->button3->UseVisualStyleBackColor = false;
this->button3->Click += gcnew System::EventHandler(this, &MyForm::button3_Click);
//
// button4
//
this->button4->BackColor = System::Drawing::SystemColors::GrayText;
this->button4->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->button4->ForeColor = System::Drawing::SystemColors::InfoText;
this->button4->Location = System::Drawing::Point(175, 282);
this->button4->Name = L"button4";
this->button4->Size = System::Drawing::Size(374, 50);
this->button4->TabIndex = 4;
this->button4->Text = L"Advanced Alarm Management";
this->button4->UseVisualStyleBackColor = false;
this->button4->Click += gcnew System::EventHandler(this, &MyForm::button4_Click);
//
// button5
//
this->button5->BackColor = System::Drawing::SystemColors::GrayText;
this->button5->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->button5->ForeColor = System::Drawing::SystemColors::InfoText;
this->button5->Location = System::Drawing::Point(175, 342);
this->button5->Name = L"button5";
this->button5->Size = System::Drawing::Size(374, 50);
this->button5->TabIndex = 5;
this->button5->Text = L"Dashboards";
this->button5->UseVisualStyleBackColor = false;
this->button5->Click += gcnew System::EventHandler(this, &MyForm::button5_Click);
//
// button6
//
this->button6->BackColor = System::Drawing::SystemColors::GrayText;
this->button6->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->button6->ForeColor = System::Drawing::SystemColors::InfoText;
this->button6->Location = System::Drawing::Point(175, 402);
this->button6->Name = L"button6";
this->button6->Size = System::Drawing::Size(374, 50);
this->button6->TabIndex = 6;
this->button6->Text = L"Dataveillance";
this->button6->UseVisualStyleBackColor = false;
this->button6->Click += gcnew System::EventHandler(this, &MyForm::button6_Click);
//
// button7
//
this->button7->BackColor = System::Drawing::SystemColors::GrayText;
this->button7->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->button7->ForeColor = System::Drawing::SystemColors::InfoText;
this->button7->Location = System::Drawing::Point(175, 462);
this->button7->Name = L"button7";
this->button7->Size = System::Drawing::Size(374, 50);
this->button7->TabIndex = 7;
this->button7->Text = L"Custom Forms and Reports";
this->button7->UseVisualStyleBackColor = false;
this->button7->Click += gcnew System::EventHandler(this, &MyForm::button7_Click);
//
// button8
//
this->button8->BackColor = System::Drawing::SystemColors::GrayText;
this->button8->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->button8->ForeColor = System::Drawing::SystemColors::InfoText;
this->button8->Location = System::Drawing::Point(175, 522);
this->button8->Name = L"button8";
this->button8->Size = System::Drawing::Size(374, 50);
this->button8->TabIndex = 8;
this->button8->Text = L"Advanced Incident Management";
this->button8->UseVisualStyleBackColor = false;
this->button8->Click += gcnew System::EventHandler(this, &MyForm::button8_Click);
//
// button9
//
this->button9->BackColor = System::Drawing::SystemColors::GrayText;
this->button9->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->button9->ForeColor = System::Drawing::SystemColors::InfoText;
this->button9->Location = System::Drawing::Point(175, 582);
this->button9->Name = L"button9";
this->button9->Size = System::Drawing::Size(374, 50);
this->button9->TabIndex = 9;
this->button9->Text = L"Active Directory";
this->button9->UseVisualStyleBackColor = false;
this->button9->Click += gcnew System::EventHandler(this, &MyForm::button9_Click);
//
// button10
//
this->button10->BackColor = System::Drawing::SystemColors::GrayText;
this->button10->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->button10->ForeColor = System::Drawing::SystemColors::InfoText;
this->button10->Location = System::Drawing::Point(175, 642);
this->button10->Name = L"button10";
this->button10->Size = System::Drawing::Size(374, 50);
this->button10->TabIndex = 10;
this->button10->Text = L"Advanced Mapping";
this->button10->UseVisualStyleBackColor = false;
this->button10->Click += gcnew System::EventHandler(this, &MyForm::button10_Click);
//
// button11
//
this->button11->BackColor = System::Drawing::SystemColors::GrayText;
this->button11->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->button11->ForeColor = System::Drawing::SystemColors::InfoText;
this->button11->Location = System::Drawing::Point(175, 702);
this->button11->Name = L"button11";
this->button11->Size = System::Drawing::Size(374, 50);
this->button11->TabIndex = 11;
this->button11->Text = L"Multi-Site Management";
this->button11->UseVisualStyleBackColor = false;
this->button11->Click += gcnew System::EventHandler(this, &MyForm::button11_Click);
//
// button12
//
this->button12->BackColor = System::Drawing::SystemColors::GrayText;
this->button12->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->button12->ForeColor = System::Drawing::SystemColors::InfoText;
this->button12->Location = System::Drawing::Point(175, 762);
this->button12->Name = L"button12";
this->button12->Size = System::Drawing::Size(374, 50);
this->button12->TabIndex = 12;
this->button12->Text = L"Application Failover and Replication";
this->button12->UseVisualStyleBackColor = false;
this->button12->Click += gcnew System::EventHandler(this, &MyForm::button12_Click);
//
// button13
//
this->button13->BackColor = System::Drawing::SystemColors::GrayText;
this->button13->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->button13->ForeColor = System::Drawing::SystemColors::InfoText;
this->button13->Location = System::Drawing::Point(175, 822);
this->button13->Name = L"button13";
this->button13->Size = System::Drawing::Size(374, 50);
this->button13->TabIndex = 13;
this->button13->Text = L"Workflows";
this->button13->UseVisualStyleBackColor = false;
this->button13->Click += gcnew System::EventHandler(this, &MyForm::button13_Click);
//
// label2
//
this->label2->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 24, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->label2->Location = System::Drawing::Point(591, 308);
this->label2->Name = L"label2";
this->label2->Size = System::Drawing::Size(494, 230);
this->label2->TabIndex = 14;
this->label2->Text = L"Please Select A License To Apply";
this->label2->TextAlign = System::Drawing::ContentAlignment::MiddleCenter;
this->label2->Click += gcnew System::EventHandler(this, &MyForm::label2_Click);
//
// menuStrip1
//
this->menuStrip1->Items->AddRange(gcnew cli::array< System::Windows::Forms::ToolStripItem^ >(1) this->exitToolStripMenuItem );
this->menuStrip1->Location = System::Drawing::Point(0, 0);
this->menuStrip1->Name = L"menuStrip1";
this->menuStrip1->Size = System::Drawing::Size(1121, 24);
this->menuStrip1->TabIndex = 15;
this->menuStrip1->Text = L"menuStrip1";
//
// exitToolStripMenuItem
//
this->exitToolStripMenuItem->Name = L"exitToolStripMenuItem";
this->exitToolStripMenuItem->Size = System::Drawing::Size(38, 20);
this->exitToolStripMenuItem->Text = L"Exit";
this->exitToolStripMenuItem->Click += gcnew System::EventHandler(this, &MyForm::exitToolStripMenuItem_Click_1);
//
// textBox1
//
this->textBox1->Location = System::Drawing::Point(684, 222);
this->textBox1->Name = L"textBox1";
this->textBox1->Size = System::Drawing::Size(298, 20);
this->textBox1->TabIndex = 16;
//
// MyForm
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->BackColor = System::Drawing::SystemColors::MenuHighlight;
this->ClientSize = System::Drawing::Size(1121, 890);
this->Controls->Add(this->textBox1);
this->Controls->Add(this->label2);
this->Controls->Add(this->button13);
this->Controls->Add(this->button12);
this->Controls->Add(this->button11);
this->Controls->Add(this->button10);
this->Controls->Add(this->button9);
this->Controls->Add(this->button8);
this->Controls->Add(this->button7);
this->Controls->Add(this->button6);
this->Controls->Add(this->button5);
this->Controls->Add(this->button4);
this->Controls->Add(this->button3);
this->Controls->Add(this->button2);
this->Controls->Add(this->button1);
this->Controls->Add(this->label1);
this->Controls->Add(this->menuStrip1);
this->MainMenuStrip = this->menuStrip1;
this->Name = L"MyForm";
this->Text = L"Synectics Demo License Selection Tool";
this->menuStrip1->ResumeLayout(false);
this->menuStrip1->PerformLayout();
this->ResumeLayout(false);
this->PerformLayout();
`private: System::Void button12_Click(System::Object^ sender, System::EventArgs^ e)
String^ IPAdd1 = textBox1->Text;
system(("xcopy /y \\\\"+IPAdd1+"\\C$\\synergyii\\config\\clientconfig.xml C:\\Test\\").c_str());
【问题讨论】：
【参考方案1】：这是因为系统中需要使用string类型，而IPAdd1属于String^类型。建议你把 IPAdd1 转成字符串类型。
#include <msclr\marshal_cppstd.h>
String^ IPAdd1 = textBox1->Text;
std::string str = msclr::interop::marshal_as<std::string>(IPAdd1);
system(("xcopy /y \\\\" + str + "\\C$\\synergyii\\config\\clientconfig.xml C:\\Test\\").c_str());
【讨论】：
Barrnet 谢谢你的建议，但是，它并没有改变错误。 测试了你的代码，发现类型匹配有问题。此外，我不建议您使用#define private public #define class struct。这可能会导致一些编译问题。以上是关于在 Visual Studio 中，表达式必须具有带有 Windows 窗体的类类型 C++的主要内容，如果未能解决你的问题，请参考以下文章
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