System.ObjectDisposedException

Question

Olá pessoal, gostaria de saber porque ocorre este erro quando abro o form2 pela segunda vez.

An unhandled exception of type 'System.ObjectDisposedException' occurred in System.Windows.Forms.dll

Additional information: Cannot access a disposed object.

Codigo da aplicação:

#pragma once

#include "form2.h"

namespace FormAppListView {

	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: Form2 ^form2;
	public:
		Form1(void)
		{
			InitializeComponent();
			//
			//TODO: Add the constructor code here
			//
			 form2 = gcnew Form2();
		}

	protected:
		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		~Form1()
		{
			if (components)
			{
				delete components;
			}
		}
	private: System::Windows::Forms::ListView^  listView1;
	protected: 
	private: System::Windows::Forms::ColumnHeader^  columnHeader1;
	private: System::Windows::Forms::ColumnHeader^  columnHeader2;
	private: System::Windows::Forms::Button^  button1;
	private: System::Windows::Forms::TextBox^  textBox1;
	private: System::Windows::Forms::Label^  label1;
	private: System::Windows::Forms::Label^  label2;
	private: System::Windows::Forms::Label^  label3;
	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::CheckBox^  checkBox1;
	private: System::Windows::Forms::Label^  label4;
	private: System::Windows::Forms::ComboBox^  comboBox1;
	private: System::Windows::Forms::Label^  label5;
	private: System::Windows::Forms::ComboBox^  comboBox2;
	private: System::Windows::Forms::GroupBox^  groupBox1;
	private: System::Windows::Forms::TextBox^  textBox3;
	private: System::Windows::Forms::TextBox^  textBox2;
	private: System::Windows::Forms::Label^  label7;
	private: System::Windows::Forms::Label^  label6;
	private: System::Windows::Forms::Timer^  timer1;
	private: System::Windows::Forms::CheckBox^  checkBox2;
	private: System::Windows::Forms::Button^  button6;
	private: System::Windows::Forms::MenuStrip^  menuStrip1;
	private: System::Windows::Forms::ToolStripMenuItem^  fileToolStripMenuItem;
	private: System::Windows::Forms::ToolStripMenuItem^  fileToolStripMenuItem1;
	private: System::Windows::Forms::ToolStripMenuItem^  settingsToolStripMenuItem;
	private: System::Windows::Forms::ToolStripMenuItem^  helpToolStripMenuItem;
	private: System::Windows::Forms::ToolStripMenuItem^  creditsToolStripMenuItem;
	private: System::Windows::Forms::ToolStripMenuItem^  decoderzToolStripMenuItem;
	private: System::Windows::Forms::Label^  label8;
	private: System::Windows::Forms::ToolStripMenuItem^  decoderzToolStripMenuItem1;

	private: System::ComponentModel::IContainer^  components;

	private:
		/// <summary>
		/// Required designer variable.
		/// </summary>
	void test()
	{
		MessageBox::Show("Are you okay?", "Ask", MessageBoxButtons::YesNo);	
	}
	

#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::Windows::Forms::ListViewItem^  listViewItem2 = (gcnew System::Windows::Forms::ListViewItem(L"test"));
			System::ComponentModel::ComponentResourceManager^  resources = (gcnew System::ComponentModel::ComponentResourceManager(Form1::typeid));
			this->listView1 = (gcnew System::Windows::Forms::ListView());
			this->columnHeader1 = (gcnew System::Windows::Forms::ColumnHeader());
			this->columnHeader2 = (gcnew System::Windows::Forms::ColumnHeader());
			this->button1 = (gcnew System::Windows::Forms::Button());
			this->textBox1 = (gcnew System::Windows::Forms::TextBox());
			this->label1 = (gcnew System::Windows::Forms::Label());
			this->label2 = (gcnew System::Windows::Forms::Label());
			this->label3 = (gcnew System::Windows::Forms::Label());
			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->checkBox1 = (gcnew System::Windows::Forms::CheckBox());
			this->label4 = (gcnew System::Windows::Forms::Label());
			this->comboBox1 = (gcnew System::Windows::Forms::ComboBox());
			this->label5 = (gcnew System::Windows::Forms::Label());
			this->comboBox2 = (gcnew System::Windows::Forms::ComboBox());
			this->groupBox1 = (gcnew System::Windows::Forms::GroupBox());
			this->textBox3 = (gcnew System::Windows::Forms::TextBox());
			this->textBox2 = (gcnew System::Windows::Forms::TextBox());
			this->label7 = (gcnew System::Windows::Forms::Label());
			this->label6 = (gcnew System::Windows::Forms::Label());
			this->timer1 = (gcnew System::Windows::Forms::Timer(this->components));
			this->checkBox2 = (gcnew System::Windows::Forms::CheckBox());
			this->button6 = (gcnew System::Windows::Forms::Button());
			this->menuStrip1 = (gcnew System::Windows::Forms::MenuStrip());
			this->fileToolStripMenuItem = (gcnew System::Windows::Forms::ToolStripMenuItem());
			this->fileToolStripMenuItem1 = (gcnew System::Windows::Forms::ToolStripMenuItem());
			this->settingsToolStripMenuItem = (gcnew System::Windows::Forms::ToolStripMenuItem());
			this->helpToolStripMenuItem = (gcnew System::Windows::Forms::ToolStripMenuItem());
			this->decoderzToolStripMenuItem1 = (gcnew System::Windows::Forms::ToolStripMenuItem());
			this->creditsToolStripMenuItem = (gcnew System::Windows::Forms::ToolStripMenuItem());
			this->decoderzToolStripMenuItem = (gcnew System::Windows::Forms::ToolStripMenuItem());
			this->label8 = (gcnew System::Windows::Forms::Label());
			this->groupBox1->SuspendLayout();
			this->menuStrip1->SuspendLayout();
			this->SuspendLayout();
			// 
			// listView1
			// 
			this->listView1->BorderStyle = System::Windows::Forms::BorderStyle::FixedSingle;
			this->listView1->Columns->AddRange(gcnew cli::array< System::Windows::Forms::ColumnHeader^  >(2) {this->columnHeader1, this->columnHeader2});
			this->listView1->Font = (gcnew System::Drawing::Font(L"Courier New", 9.75F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
				static_cast<System::Byte>(0)));
			this->listView1->Items->AddRange(gcnew cli::array< System::Windows::Forms::ListViewItem^  >(1) {listViewItem2});
			this->listView1->Location = System::Drawing::Point(2, 91);
			this->listView1->Margin = System::Windows::Forms::Padding(3, 4, 3, 4);
			this->listView1->Name = L"listView1";
			this->listView1->Size = System::Drawing::Size(161, 241);
			this->listView1->TabIndex = 0;
			this->listView1->UseCompatibleStateImageBehavior = false;
			this->listView1->View = System::Windows::Forms::View::Details;
			// 
			// columnHeader1
			// 
			this->columnHeader1->Text = L"Address";
			this->columnHeader1->Width = 80;
			// 
			// columnHeader2
			// 
			this->columnHeader2->Text = L"Value";
			this->columnHeader2->Width = 80;
			// 
			// button1
			// 
			this->button1->Location = System::Drawing::Point(94, 340);
			this->button1->Margin = System::Windows::Forms::Padding(3, 4, 3, 4);
			this->button1->Name = L"button1";
			this->button1->Size = System::Drawing::Size(69, 30);
			this->button1->TabIndex = 1;
			this->button1->Text = L"Add item";
			this->button1->UseVisualStyleBackColor = true;
			this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
			// 
			// textBox1
			// 
			this->textBox1->Font = (gcnew System::Drawing::Font(L"Courier New", 9.75F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
				static_cast<System::Byte>(0)));
			this->textBox1->Location = System::Drawing::Point(218, 135);
			this->textBox1->Margin = System::Windows::Forms::Padding(3, 4, 3, 4);
			this->textBox1->Name = L"textBox1";
			this->textBox1->Size = System::Drawing::Size(265, 22);
			this->textBox1->TabIndex = 2;
			// 
			// label1
			// 
			this->label1->AutoSize = true;
			this->label1->Location = System::Drawing::Point(215, 118);
			this->label1->Name = L"label1";
			this->label1->Size = System::Drawing::Size(37, 13);
			this->label1->TabIndex = 3;
			this->label1->Text = L"Value:";
			// 
			// label2
			// 
			this->label2->AutoSize = true;
			this->label2->Location = System::Drawing::Point(-3, 74);
			this->label2->Name = L"label2";
			this->label2->Size = System::Drawing::Size(43, 13);
			this->label2->TabIndex = 4;
			this->label2->Text = L"Found: ";
			// 
			// label3
			// 
			this->label3->AutoSize = true;
			this->label3->Location = System::Drawing::Point(46, 74);
			this->label3->Name = L"label3";
			this->label3->Size = System::Drawing::Size(13, 13);
			this->label3->TabIndex = 5;
			this->label3->Text = L"0";
			// 
			// button2
			// 
			this->button2->Location = System::Drawing::Point(275, 339);
			this->button2->Margin = System::Windows::Forms::Padding(3, 4, 3, 4);
			this->button2->Name = L"button2";
			this->button2->Size = System::Drawing::Size(54, 49);
			this->button2->TabIndex = 6;
			this->button2->Text = L"Clear items";
			this->button2->UseVisualStyleBackColor = true;
			this->button2->Click += gcnew System::EventHandler(this, &Form1::button2_Click);
			// 
			// button3
			// 
			this->button3->Location = System::Drawing::Point(186, 89);
			this->button3->Margin = System::Windows::Forms::Padding(3, 4, 3, 4);
			this->button3->Name = L"button3";
			this->button3->Size = System::Drawing::Size(75, 25);
			this->button3->TabIndex = 7;
			this->button3->Text = L"First Scan";
			this->button3->UseVisualStyleBackColor = true;
			// 
			// button4
			// 
			this->button4->Location = System::Drawing::Point(267, 89);
			this->button4->Margin = System::Windows::Forms::Padding(3, 4, 3, 4);
			this->button4->Name = L"button4";
			this->button4->Size = System::Drawing::Size(75, 25);
			this->button4->TabIndex = 8;
			this->button4->Text = L"Next Scan";
			this->button4->UseVisualStyleBackColor = true;
			// 
			// button5
			// 
			this->button5->Location = System::Drawing::Point(408, 89);
			this->button5->Margin = System::Windows::Forms::Padding(3, 4, 3, 4);
			this->button5->Name = L"button5";
			this->button5->Size = System::Drawing::Size(75, 25);
			this->button5->TabIndex = 9;
			this->button5->Text = L"Undo Scan";
			this->button5->UseVisualStyleBackColor = true;
			// 
			// checkBox1
			// 
			this->checkBox1->AutoSize = true;
			this->checkBox1->Location = System::Drawing::Point(169, 135);
			this->checkBox1->Margin = System::Windows::Forms::Padding(3, 4, 3, 4);
			this->checkBox1->Name = L"checkBox1";
			this->checkBox1->Size = System::Drawing::Size(45, 17);
			this->checkBox1->TabIndex = 10;
			this->checkBox1->Text = L"Hex";
			this->checkBox1->UseVisualStyleBackColor = true;
			// 
			// label4
			// 
			this->label4->AutoSize = true;
			this->label4->Location = System::Drawing::Point(169, 173);
			this->label4->Name = L"label4";
			this->label4->Size = System::Drawing::Size(65, 13);
			this->label4->TabIndex = 11;
			this->label4->Text = L"Scan Type: ";
			// 
			// comboBox1
			// 
			this->comboBox1->DropDownStyle = System::Windows::Forms::ComboBoxStyle::DropDownList;
			this->comboBox1->FormattingEnabled = true;
			this->comboBox1->Items->AddRange(gcnew cli::array< System::Object^  >(1) {L"Exact Value"});
			this->comboBox1->Location = System::Drawing::Point(233, 165);
			this->comboBox1->Margin = System::Windows::Forms::Padding(3, 4, 3, 4);
			this->comboBox1->Name = L"comboBox1";
			this->comboBox1->Size = System::Drawing::Size(167, 21);
			this->comboBox1->TabIndex = 12;
			// 
			// label5
			// 
			this->label5->AutoSize = true;
			this->label5->Location = System::Drawing::Point(169, 200);
			this->label5->Name = L"label5";
			this->label5->Size = System::Drawing::Size(67, 13);
			this->label5->TabIndex = 13;
			this->label5->Text = L"Value Type: ";
			// 
			// comboBox2
			// 
			this->comboBox2->DropDownStyle = System::Windows::Forms::ComboBoxStyle::DropDownList;
			this->comboBox2->FormattingEnabled = true;
			this->comboBox2->Items->AddRange(gcnew cli::array< System::Object^  >(1) {L"4 Bytes"});
			this->comboBox2->Location = System::Drawing::Point(233, 193);
			this->comboBox2->Name = L"comboBox2";
			this->comboBox2->Size = System::Drawing::Size(167, 21);
			this->comboBox2->TabIndex = 14;
			// 
			// groupBox1
			// 
			this->groupBox1->Controls->Add(this->textBox3);
			this->groupBox1->Controls->Add(this->textBox2);
			this->groupBox1->Controls->Add(this->label7);
			this->groupBox1->Controls->Add(this->label6);
			this->groupBox1->Location = System::Drawing::Point(233, 223);
			this->groupBox1->Name = L"groupBox1";
			this->groupBox1->Size = System::Drawing::Size(167, 109);
			this->groupBox1->TabIndex = 15;
			this->groupBox1->TabStop = false;
			this->groupBox1->Text = L"Memory Scan Options";
			// 
			// textBox3
			// 
			this->textBox3->Font = (gcnew System::Drawing::Font(L"Courier New", 9.75F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
				static_cast<System::Byte>(0)));
			this->textBox3->Location = System::Drawing::Point(42, 49);
			this->textBox3->Name = L"textBox3";
			this->textBox3->Size = System::Drawing::Size(119, 22);
			this->textBox3->TabIndex = 3;
			this->textBox3->Text = L"ffffffff";
			this->textBox3->TextAlign = System::Windows::Forms::HorizontalAlignment::Right;
			// 
			// textBox2
			// 
			this->textBox2->Font = (gcnew System::Drawing::Font(L"Courier New", 9.75F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
				static_cast<System::Byte>(0)));
			this->textBox2->Location = System::Drawing::Point(42, 23);
			this->textBox2->Name = L"textBox2";
			this->textBox2->Size = System::Drawing::Size(119, 22);
			this->textBox2->TabIndex = 2;
			this->textBox2->Text = L"00000000";
			this->textBox2->TextAlign = System::Windows::Forms::HorizontalAlignment::Right;
			// 
			// label7
			// 
			this->label7->AutoSize = true;
			this->label7->Location = System::Drawing::Point(7, 48);
			this->label7->Name = L"label7";
			this->label7->Size = System::Drawing::Size(29, 13);
			this->label7->TabIndex = 1;
			this->label7->Text = L"Stop";
			// 
			// label6
			// 
			this->label6->AutoSize = true;
			this->label6->Location = System::Drawing::Point(7, 26);
			this->label6->Name = L"label6";
			this->label6->Size = System::Drawing::Size(29, 13);
			this->label6->TabIndex = 0;
			this->label6->Text = L"Start";
			// 
			// timer1
			// 
			this->timer1->Tick += gcnew System::EventHandler(this, &Form1::timer1_Tick);
			// 
			// checkBox2
			// 
			this->checkBox2->AutoSize = true;
			this->checkBox2->Location = System::Drawing::Point(415, 191);
			this->checkBox2->Name = L"checkBox2";
			this->checkBox2->Size = System::Drawing::Size(68, 17);
			this->checkBox2->TabIndex = 17;
			this->checkBox2->Text = L"TopMost";
			this->checkBox2->UseVisualStyleBackColor = true;
			// 
			// button6
			// 
			this->button6->BackgroundImage = (cli::safe_cast<System::Drawing::Image^  >(resources->GetObject(L"button6.BackgroundImage")));
			this->button6->BackgroundImageLayout = System::Windows::Forms::ImageLayout::Zoom;
			this->button6->Location = System::Drawing::Point(2, 27);
			this->button6->Name = L"button6";
			this->button6->Size = System::Drawing::Size(38, 35);
			this->button6->TabIndex = 18;
			this->button6->UseVisualStyleBackColor = true;
			this->button6->Click += gcnew System::EventHandler(this, &Form1::button6_Click);
			// 
			// menuStrip1
			// 
			this->menuStrip1->Items->AddRange(gcnew cli::array< System::Windows::Forms::ToolStripItem^  >(4) {this->fileToolStripMenuItem, 
				this->fileToolStripMenuItem1, this->helpToolStripMenuItem, this->creditsToolStripMenuItem});
			this->menuStrip1->Location = System::Drawing::Point(0, 0);
			this->menuStrip1->Name = L"menuStrip1";
			this->menuStrip1->Size = System::Drawing::Size(495, 24);
			this->menuStrip1->TabIndex = 19;
			this->menuStrip1->Text = L"menuStrip1";
			// 
			// fileToolStripMenuItem
			// 
			this->fileToolStripMenuItem->Name = L"fileToolStripMenuItem";
			this->fileToolStripMenuItem->Size = System::Drawing::Size(37, 20);
			this->fileToolStripMenuItem->Text = L"File";
			// 
			// fileToolStripMenuItem1
			// 
			this->fileToolStripMenuItem1->DropDownItems->AddRange(gcnew cli::array< System::Windows::Forms::ToolStripItem^  >(1) {this->settingsToolStripMenuItem});
			this->fileToolStripMenuItem1->Name = L"fileToolStripMenuItem1";
			this->fileToolStripMenuItem1->Size = System::Drawing::Size(39, 20);
			this->fileToolStripMenuItem1->Text = L"Edit";
			// 
			// settingsToolStripMenuItem
			// 
			this->settingsToolStripMenuItem->Name = L"settingsToolStripMenuItem";
			this->settingsToolStripMenuItem->Size = System::Drawing::Size(116, 22);
			this->settingsToolStripMenuItem->Text = L"Settings";
			// 
			// helpToolStripMenuItem
			// 
			this->helpToolStripMenuItem->DropDownItems->AddRange(gcnew cli::array< System::Windows::Forms::ToolStripItem^  >(1) {this->decoderzToolStripMenuItem1});
			this->helpToolStripMenuItem->Name = L"helpToolStripMenuItem";
			this->helpToolStripMenuItem->Size = System::Drawing::Size(44, 20);
			this->helpToolStripMenuItem->Text = L"Help";
			// 
			// decoderzToolStripMenuItem1
			// 
			this->decoderzToolStripMenuItem1->Name = L"decoderzToolStripMenuItem1";
			this->decoderzToolStripMenuItem1->Size = System::Drawing::Size(123, 22);
			this->decoderzToolStripMenuItem1->Text = L"Decoderz";
			// 
			// creditsToolStripMenuItem
			// 
			this->creditsToolStripMenuItem->DropDownItems->AddRange(gcnew cli::array< System::Windows::Forms::ToolStripItem^  >(1) {this->decoderzToolStripMenuItem});
			this->creditsToolStripMenuItem->Name = L"creditsToolStripMenuItem";
			this->creditsToolStripMenuItem->Size = System::Drawing::Size(56, 20);
			this->creditsToolStripMenuItem->Text = L"Credits";
			// 
			// decoderzToolStripMenuItem
			// 
			this->decoderzToolStripMenuItem->Name = L"decoderzToolStripMenuItem";
			this->decoderzToolStripMenuItem->Size = System::Drawing::Size(123, 22);
			this->decoderzToolStripMenuItem->Text = L"Decoderz";
			// 
			// label8
			// 
			this->label8->AutoSize = true;
			this->label8->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 9.75F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
				static_cast<System::Byte>(0)));
			this->label8->ForeColor = System::Drawing::Color::Red;
			this->label8->Location = System::Drawing::Point(183, 27);
			this->label8->Name = L"label8";
			this->label8->Size = System::Drawing::Size(120, 16);
			this->label8->TabIndex = 20;
			this->label8->Text = L"No Process Select";
			// 
			// Form1
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(495, 467);
			this->Controls->Add(this->label8);
			this->Controls->Add(this->button6);
			this->Controls->Add(this->checkBox2);
			this->Controls->Add(this->groupBox1);
			this->Controls->Add(this->comboBox2);
			this->Controls->Add(this->label5);
			this->Controls->Add(this->comboBox1);
			this->Controls->Add(this->label4);
			this->Controls->Add(this->checkBox1);
			this->Controls->Add(this->button5);
			this->Controls->Add(this->button4);
			this->Controls->Add(this->button3);
			this->Controls->Add(this->button2);
			this->Controls->Add(this->label3);
			this->Controls->Add(this->label2);
			this->Controls->Add(this->label1);
			this->Controls->Add(this->textBox1);
			this->Controls->Add(this->button1);
			this->Controls->Add(this->listView1);
			this->Controls->Add(this->menuStrip1);
			this->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 8.25F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
				static_cast<System::Byte>(0)));
			this->FormBorderStyle = System::Windows::Forms::FormBorderStyle::FixedDialog;
			this->Icon = (cli::safe_cast<System::Drawing::Icon^  >(resources->GetObject(L"$this.Icon")));
			this->MainMenuStrip = this->menuStrip1;
			this->Margin = System::Windows::Forms::Padding(3, 4, 3, 4);
			this->Name = L"Form1";
			this->StartPosition = System::Windows::Forms::FormStartPosition::CenterScreen;
			this->Text = L"[DZ Engine] - Decoderz";
			this->groupBox1->ResumeLayout(false);
			this->groupBox1->PerformLayout();
			this->menuStrip1->ResumeLayout(false);
			this->menuStrip1->PerformLayout();
			this->ResumeLayout(false);
			this->PerformLayout();

		}
		
#pragma endregion

	private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
			this->listView1->Items->Add(this->textBox1->Text);
			this->listView1->Items[0]->SubItems->Add("Aldo");
			test();
			//textBox1->Clear;

	}
	private: System::Void button2_Click(System::Object^  sender, System::EventArgs^  e) {
			this->listView1->Items->Clear();
	}
	
	private: System::Void timer1_Tick(System::Object^  sender, System::EventArgs^  e) {
					 
	}
private: System::Void button6_Click(System::Object^  sender, System::EventArgs^  e) {
			 form2->Show();
		 }
};
}

Atenciosamente.

---

Decoderz

Answer 1

Crie uma instância do form cada vez que for abrir.

Form2^ form2 = gcnew Form2();
form2->Show();

Tire o código do construtor e a variável pública.