我正在尝试将usb相机的实时反馈放在MyForm.h中的PictureBox中。我找到了在PictureBox上应用位图的代码（DrawCVImage）。问题是，在编译它时，表示pictureBox1未在.cpp文件中声明。什么可能导致这个问题？是否有一个缺少的指针？
#pragma once
namespace Project1 {
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 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::Button^ button1;
private: System::IO::Ports::SerialPort^ serialPort1;
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::PictureBox^ pictureBox1;
private: System::ComponentModel::IContainer^ components;
protected:
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->components = (gcnew System::ComponentModel::Container());
System::ComponentModel::ComponentResourceManager^ resources = (gcnew System::ComponentModel::ComponentResourceManager(MyForm::typeid));
this->button1 = (gcnew System::Windows::Forms::Button());
this->serialPort1 = (gcnew System::IO::Ports::SerialPort(this->components));
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->pictureBox1 = (gcnew System::Windows::Forms::PictureBox());
(cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox1))->BeginInit();
this->SuspendLayout();
//
// button1
//
this->button1->BackgroundImage = (cli::safe_cast<System::Drawing::Image^>(resources->GetObject(L"button1.BackgroundImage")));
this->button1->CausesValidation = false;
this->button1->Location = System::Drawing::Point(952, 206);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(80, 80);
this->button1->TabIndex = 0;
this->button1->TabStop = false;
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this, &MyForm::button1_Click);
this->button1->KeyDown += gcnew System::Windows::Forms::KeyEventHandler(this, &MyForm::button1_KeyDown);
this->button1->KeyUp += gcnew System::Windows::Forms::KeyEventHandler(this, &MyForm::button1_KeyUp);
this->button1->MouseDown += gcnew System::Windows::Forms::MouseEventHandler(this, &MyForm::button1_MouseDown);
this->button1->MouseUp += gcnew System::Windows::Forms::MouseEventHandler(this, &MyForm::button1_MouseUp);
//
// serialPort1
//
this->serialPort1->PortName = L"COM6";
//
// button2
//
this->button2->BackgroundImage = (cli::safe_cast<System::Drawing::Image^>(resources->GetObject(L"button2.BackgroundImage")));
this->button2->CausesValidation = false;
this->button2->Location = System::Drawing::Point(786, 206);
this->button2->Name = L"button2";
this->button2->Size = System::Drawing::Size(80, 80);
this->button2->TabIndex = 1;
this->button2->TabStop = false;
this->button2->UseVisualStyleBackColor = true;
this->button2->Click += gcnew System::EventHandler(this, &MyForm::button2_Click);
this->button2->KeyDown += gcnew System::Windows::Forms::KeyEventHandler(this, &MyForm::button2_KeyDown);
this->button2->KeyUp += gcnew System::Windows::Forms::KeyEventHandler(this, &MyForm::button2_KeyUp);
this->button2->MouseDown += gcnew System::Windows::Forms::MouseEventHandler(this, &MyForm::button2_MouseDown);
this->button2->MouseUp += gcnew System::Windows::Forms::MouseEventHandler(this, &MyForm::button2_MouseUp);
//
// button3
//
this->button3->BackgroundImage = (cli::safe_cast<System::Drawing::Image^>(resources->GetObject(L"button3.BackgroundImage")));
this->button3->Location = System::Drawing::Point(866, 120);
this->button3->Name = L"button3";
this->button3->Size = System::Drawing::Size(80, 80);
this->button3->TabIndex = 2;
this->button3->Text = L"button3";
this->button3->UseVisualStyleBackColor = true;
this->button3->MouseDown += gcnew System::Windows::Forms::MouseEventHandler(this, &MyForm::button3_MouseDown);
this->button3->MouseUp += gcnew System::Windows::Forms::MouseEventHandler(this, &MyForm::button3_MouseUp);
//
// button4
//
this->button4->BackgroundImage = (cli::safe_cast<System::Drawing::Image^>(resources->GetObject(L"button4.BackgroundImage")));
this->button4->Location = System::Drawing::Point(866, 292);
this->button4->Name = L"button4";
this->button4->Size = System::Drawing::Size(80, 80);
this->button4->TabIndex = 3;
this->button4->Text = L"button4";
this->button4->UseVisualStyleBackColor = true;
this->button4->MouseDown += gcnew System::Windows::Forms::MouseEventHandler(this, &MyForm::button4_MouseDown);
this->button4->MouseUp += gcnew System::Windows::Forms::MouseEventHandler(this, &MyForm::button4_MouseUp);
//
// button5
//
this->button5->Location = System::Drawing::Point(782, 421);
this->button5->Name = L"button5";
this->button5->Size = System::Drawing::Size(250, 80);
this->button5->TabIndex = 4;
this->button5->Text = L"SHOOT";
this->button5->UseVisualStyleBackColor = true;
//
// pictureBox1
//
this->pictureBox1->Location = System::Drawing::Point(31, 21);
this->pictureBox1->Name = L"pictureBox1";
this->pictureBox1->Size = System::Drawing::Size(640, 480);
this->pictureBox1->TabIndex = 5;
this->pictureBox1->TabStop = false;
//
// MyForm
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->AutoValidate = System::Windows::Forms::AutoValidate::EnablePreventFocusChange;
this->ClientSize = System::Drawing::Size(1077, 538);
this->Controls->Add(this->pictureBox1);
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->KeyPreview = true;
this->Name = L"MyForm";
this->Text = L"MyForm";
this->Load += gcnew System::EventHandler(this, &MyForm::MyForm_Load);
(cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox1))->EndInit();
this->ResumeLayout(false);
}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {
}
private: System::Void button2_Click(System::Object^ sender, System::EventArgs^ e) {
}
private: System::Void button1_KeyDown(System::Object^ sender, System::Windows::Forms::KeyEventArgs^ e) {
if (e->KeyCode == Keys::NumPad6) {
serialPort1->Open();
serialPort1->Write("R");
serialPort1->Close();
}
}
private: System::Void button1_KeyUp(System::Object^ sender, System::Windows::Forms::KeyEventArgs^ e) {
if (e->KeyCode == Keys::NumPad6) {
serialPort1->Open();
serialPort1->Write("X");
serialPort1->Close();
}
}
private: System::Void button1_MouseDown(System::Object^ sender, System::Windows::Forms::MouseEventArgs^ e) {
serialPort1->Open();
serialPort1->Write("R");
serialPort1->Close();
}
private: System::Void button1_MouseUp(System::Object^ sender, System::Windows::Forms::MouseEventArgs^ e) {
serialPort1->Open();
serialPort1->Write("X");
serialPort1->Close();
}
private: System::Void button2_KeyDown(System::Object^ sender, System::Windows::Forms::KeyEventArgs^ e) {
if (e->KeyCode == Keys::NumPad4) {
serialPort1->Open();
serialPort1->Write("L");
serialPort1->Close();
}
}
private: System::Void button2_KeyUp(System::Object^ sender, System::Windows::Forms::KeyEventArgs^ e) {
if (e->KeyCode == Keys::NumPad4) {
serialPort1->Open();
serialPort1->Write("X");
serialPort1->Close();
}
}
};
}
cpp文件代码
//#include "stdafx.h"
#include <opencv2\opencv.hpp>
#include <opencv2\imgcodecs.hpp>
#include "MyForm.h"
using namespace cv;
using namespace System;
using namespace System::Windows::Forms;
using namespace System::Drawing;
void DrawCVImage(System::Windows::Forms::Control^ control, cv::Mat& colorImage)
{
System::Drawing::Graphics^ graphics = control->CreateGraphics();
System::IntPtr ptr(colorImage.ptr());
System::Drawing::Bitmap^ b = gcnew System::Drawing::Bitmap(colorImage.cols, colorImage.rows, colorImage.step, System::Drawing::Imaging::PixelFormat::Format24bppRgb, ptr);
System::Drawing::RectangleF rect(0, 0, control->Width, control->Height);
graphics->DrawImage(b, rect);
delete graphics;
}
int main() {
Mat img;
VideoCapture cam(0);
while (1) {
cam >> img;
DrawCVImage(pictureBox1, img);
if (waitKey(1) == 27)
break;
}
cam.release();
return 0;
}