关于c++ windows窗体应用程序 的未将对象引用设置到对象实例的问题

程序编译成功后却无法弹出窗口来
调试之后发现卡在了imagelist的地方 不知道是索引的问题呢还是什么问题
求大神不吝赐教 十分感谢！！！

程序是模拟狼吃羊的游戏
因为代码太长了就不全部贴出来了
应该涉及到的：

 void World::setGridSize(int gridsize)
{
    this->gridSize=gridsize;
    int i,j;
    for (i=0; i<this->gridSize; i++)
    {
        for (j=0; j<this->gridSize; j++)
        {
            grid[i][j]=NULL;
        }
    }
}

 void display()
{
    for (int i=0; i<world.getGridsize(); i++)
    {
        for ( int j=0; j<world.getGridsize(); j++)
        {
            gPic[i,j]->Image=this->gImageList->Images[world.Display(i,j)];
        }
    }
}

 int World::Display(int i,int j)
{
    if (grid[i][j]==NULL)
        return 1;  
    else if (grid[i][j]->getType()==SHEEP)
        return 2;  
    else return 0; 
}

图片数组：

 private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
             //初始化界面
             gImageList = gcnew ImageList;
             gImageList->ImageSize =System::Drawing::Size(48,48);
             gImageList->Images->Add( Image::FromFile( "F://C_project//WAS//614//WolfandSheep//WolfandSheep//Wolf.jpg" ) ); //索引0代表狼
             gImageList->Images->Add( Image::FromFile( "F://C_project//WAS//614//WolfandSheep//WolfandSheep//Grass.jpg" ) );//索引1代表草
             gImageList->Images->Add( Image::FromFile( "F://C_project//WAS//614//WolfandSheep//WolfandSheep//Sheep.jpg" ) );//索引2代表羊
             RandGrid();
         }

//等号右侧不是ImageSize想要的值
 gImageList->ImageSize =("F://C_project//WAS//614//WolfandSheep//WolfandSheep//Sheep.jpg"));

应该类似：

 gImageList->ImageSize = System::Drawing::Size(256, 256);

用心回答每个问题，如果对您有帮助，请采纳答案好吗，谢谢！

原来是InitializeComponent() 不正常退出的问题。。。
每次这一句运行完都没有返回 跳到了下面的form_sizechage函数中

以下是窗体中的代码：

 #pragma once
#include "World.h"
World world; //全局变量
namespace WolfandSheep {

    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>
    /// Form1 摘要
    /// </summary>
    public ref class Form1 : public System::Windows::Forms::Form
    {
    public:
        Form1(void)
        {
            InitializeComponent();
            //
            //TODO: 在此处添加构造函数代码
            //
        }

    protected:
        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        ~Form1()
        {
            if (components)
            {
                delete components;
            }
        }
    private: System::Windows::Forms::Panel^  panel1;
             //protected: 
    private: System::Windows::Forms::PictureBox^  pictureBox1;
    private: System::Windows::Forms::Timer^  timer1;
    private: System::Windows::Forms::Label^  label1;
    private: System::Windows::Forms::Label^  label2;
    private: System::Windows::Forms::Label^  label3;
    private: System::Windows::Forms::NumericUpDown^  Wolfcounts;
    private: System::Windows::Forms::NumericUpDown^  Sheepcounts;
    private: System::Windows::Forms::NumericUpDown^  numGridSize;
    private: System::Windows::Forms::Button^  btninit;
    private: System::Windows::Forms::Button^  btnstart;
    private: System::Windows::Forms::Button^  btnstop;
    private: System::Windows::Forms::Button^  btnclose;
    private: System::Windows::Forms::GroupBox^  groupBox1;
    private: System::ComponentModel::IContainer^  components;

    private:
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        array<PictureBox^,2>^ gPic; 
        ImageList^ gImageList;


#pragma region Windows Form Designer generated code
        /// <summary>
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        void InitializeComponent(void)
        {
            this->components = (gcnew System::ComponentModel::Container());
            this->panel1 = (gcnew System::Windows::Forms::Panel());
            this->pictureBox1 = (gcnew System::Windows::Forms::PictureBox());
            this->timer1 = (gcnew System::Windows::Forms::Timer(this->components));
            this->label1 = (gcnew System::Windows::Forms::Label());
            this->label2 = (gcnew System::Windows::Forms::Label());
            this->label3 = (gcnew System::Windows::Forms::Label());
            this->Wolfcounts = (gcnew System::Windows::Forms::NumericUpDown());
            this->Sheepcounts = (gcnew System::Windows::Forms::NumericUpDown());
            this->numGridSize = (gcnew System::Windows::Forms::NumericUpDown());
            this->btninit = (gcnew System::Windows::Forms::Button());
            this->btnstart = (gcnew System::Windows::Forms::Button());
            this->btnstop = (gcnew System::Windows::Forms::Button());
            this->btnclose = (gcnew System::Windows::Forms::Button());
            this->groupBox1 = (gcnew System::Windows::Forms::GroupBox());
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->pictureBox1))->BeginInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->Wolfcounts))->BeginInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->Sheepcounts))->BeginInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->numGridSize))->BeginInit();
            this->groupBox1->SuspendLayout();
            this->SuspendLayout();
            // 
            // panel1
            // 
            this->panel1->Location = System::Drawing::Point(0, 1);
            this->panel1->Margin = System::Windows::Forms::Padding(4);
            this->panel1->Name = L"panel1";
            this->panel1->Size = System::Drawing::Size(890, 594);
            this->panel1->TabIndex = 0;
            // 
            // pictureBox1
            // 
            this->pictureBox1->Location = System::Drawing::Point(56, 42);
            this->pictureBox1->Margin = System::Windows::Forms::Padding(4);
            this->pictureBox1->Name = L"pictureBox1";
            this->pictureBox1->Size = System::Drawing::Size(776, 501);
            this->pictureBox1->SizeMode = System::Windows::Forms::PictureBoxSizeMode::StretchImage;
            this->pictureBox1->TabIndex = 0;
            this->pictureBox1->TabStop = false;
            // 
            // timer1
            // 
            this->timer1->Interval = 1000;
            this->timer1->Tick += gcnew System::EventHandler(this, &Form1::timer1_Tick);
            // 
            // label1
            // 
            this->label1->AutoSize = true;
            this->label1->Font = (gcnew System::Drawing::Font(L"宋体", 10.8F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
                static_cast<System::Byte>(134)));
            this->label1->Location = System::Drawing::Point(33, 56);
            this->label1->Name = L"label1";
            this->label1->Size = System::Drawing::Size(85, 19);
            this->label1->TabIndex = 1;
            this->label1->Text = L"狼的数量";
            // 
            // label2
            // 
            this->label2->AutoSize = true;
            this->label2->Font = (gcnew System::Drawing::Font(L"宋体", 10.8F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
                static_cast<System::Byte>(134)));
            this->label2->Location = System::Drawing::Point(34, 107);
            this->label2->Name = L"label2";
            this->label2->Size = System::Drawing::Size(85, 19);
            this->label2->TabIndex = 2;
            this->label2->Text = L"羊的数量";
            // 
            // label3
            // 
            this->label3->AutoSize = true;
            this->label3->Font = (gcnew System::Drawing::Font(L"宋体", 10.8F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
                static_cast<System::Byte>(134)));
            this->label3->Location = System::Drawing::Point(34, 153);
            this->label3->Name = L"label3";
            this->label3->Size = System::Drawing::Size(85, 19);
            this->label3->TabIndex = 3;
            this->label3->Text = L"网格数量";
            // 
            // Wolfcounts
            // 
            this->Wolfcounts->Location = System::Drawing::Point(135, 53);
            this->Wolfcounts->Maximum = System::Decimal(gcnew cli::array< System::Int32 >(4) {99, 0, 0, 0});
            this->Wolfcounts->Minimum = System::Decimal(gcnew cli::array< System::Int32 >(4) {1, 0, 0, 0});
            this->Wolfcounts->Name = L"Wolfcounts";
            this->Wolfcounts->Size = System::Drawing::Size(84, 25);
            this->Wolfcounts->TabIndex = 4;
            this->Wolfcounts->Value = System::Decimal(gcnew cli::array< System::Int32 >(4) {5, 0, 0, 0});
            this->Wolfcounts->ValueChanged += gcnew System::EventHandler(this, &Form1::Wolfcounts_ValueChanged);
            // 
            // Sheepcounts
            // 
            this->Sheepcounts->Location = System::Drawing::Point(135, 104);
            this->Sheepcounts->Maximum = System::Decimal(gcnew cli::array< System::Int32 >(4) {99, 0, 0, 0});
            this->Sheepcounts->Minimum = System::Decimal(gcnew cli::array< System::Int32 >(4) {1, 0, 0, 0});
            this->Sheepcounts->Name = L"Sheepcounts";
            this->Sheepcounts->Size = System::Drawing::Size(84, 25);
            this->Sheepcounts->TabIndex = 5;
            this->Sheepcounts->Value = System::Decimal(gcnew cli::array< System::Int32 >(4) {20, 0, 0, 0});
            this->Sheepcounts->ValueChanged += gcnew System::EventHandler(this, &Form1::Sheepcounts_ValueChanged);
            // 
            // numGridSize
            // 
            this->numGridSize->Location = System::Drawing::Point(135, 149);
            this->numGridSize->Maximum = System::Decimal(gcnew cli::array< System::Int32 >(4) {30, 0, 0, 0});
            this->numGridSize->Minimum = System::Decimal(gcnew cli::array< System::Int32 >(4) {5, 0, 0, 0});
            this->numGridSize->Name = L"numGridSize";
            this->numGridSize->Size = System::Drawing::Size(84, 25);
            this->numGridSize->TabIndex = 6;
            this->numGridSize->Value = System::Decimal(gcnew cli::array< System::Int32 >(4) {10, 0, 0, 0});
            this->numGridSize->ValueChanged += gcnew System::EventHandler(this, &Form1::numGridSize_ValueChanged);
            // 
            // btninit
            // 
            this->btninit->Location = System::Drawing::Point(42, 280);
            this->btninit->Name = L"btninit";
            this->btninit->Size = System::Drawing::Size(176, 39);
            this->btninit->TabIndex = 7;
            this->btninit->Text = L"初始化";
            this->btninit->UseVisualStyleBackColor = true;
            this->btninit->Click += gcnew System::EventHandler(this, &Form1::btninit_Click);
            // 
            // btnstart
            // 
            this->btnstart->Location = System::Drawing::Point(42, 347);
            this->btnstart->Name = L"btnstart";
            this->btnstart->Size = System::Drawing::Size(177, 40);
            this->btnstart->TabIndex = 8;
            this->btnstart->Text = L"开始";
            this->btnstart->UseVisualStyleBackColor = true;
            this->btnstart->Click += gcnew System::EventHandler(this, &Form1::btnstart_Click);
            // 
            // btnstop
            // 
            this->btnstop->Location = System::Drawing::Point(42, 414);
            this->btnstop->Name = L"btnstop";
            this->btnstop->Size = System::Drawing::Size(177, 41);
            this->btnstop->TabIndex = 9;
            this->btnstop->Text = L"暂停";
            this->btnstop->UseVisualStyleBackColor = true;
            this->btnstop->Click += gcnew System::EventHandler(this, &Form1::btnstop_Click);
            // 
            // btnclose
            // 
            this->btnclose->Location = System::Drawing::Point(42, 483);
            this->btnclose->Name = L"btnclose";
            this->btnclose->Size = System::Drawing::Size(177, 42);
            this->btnclose->TabIndex = 10;
            this->btnclose->Text = L"结束";
            this->btnclose->UseVisualStyleBackColor = true;
            this->btnclose->Click += gcnew System::EventHandler(this, &Form1::btnclose_Click);
            // 
            // groupBox1
            // 
            this->groupBox1->Controls->Add(this->btnclose);
            this->groupBox1->Controls->Add(this->btnstop);
            this->groupBox1->Controls->Add(this->btnstart);
            this->groupBox1->Controls->Add(this->btninit);
            this->groupBox1->Controls->Add(this->numGridSize);
            this->groupBox1->Controls->Add(this->Sheepcounts);
            this->groupBox1->Controls->Add(this->Wolfcounts);
            this->groupBox1->Controls->Add(this->label3);
            this->groupBox1->Controls->Add(this->label2);
            this->groupBox1->Controls->Add(this->label1);
            this->groupBox1->Location = System::Drawing::Point(890, 1);
            this->groupBox1->Name = L"groupBox1";
            this->groupBox1->Size = System::Drawing::Size(266, 593);
            this->groupBox1->TabIndex = 11;
            this->groupBox1->TabStop = false;
            this->groupBox1->Text = L"控制面板";
            // 
            // Form1
            // 
            this->AutoScaleDimensions = System::Drawing::SizeF(8, 15);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(1155, 594);
            this->Controls->Add(this->groupBox1);
            this->Controls->Add(this->pictureBox1);
            this->Controls->Add(this->panel1);
            this->Name = L"Form1";
            this->StartPosition = System::Windows::Forms::FormStartPosition::CenterScreen;
            this->Text = L"WolfandSheep";
            this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
            this->SizeChanged += gcnew System::EventHandler(this, &Form1::Form1_SizeChanged);
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->pictureBox1))->EndInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->Wolfcounts))->EndInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->Sheepcounts))->EndInit();
            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->numGridSize))->EndInit();
            this->groupBox1->ResumeLayout(false);
            this->groupBox1->PerformLayout();
            this->ResumeLayout(false);

        }
#pragma endregion

private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
             //初始化界面
             gImageList = gcnew ImageList;
             gImageList->ImageSize = System::Drawing::Size(48,48);/*wolf.png*//*grass.png*//*sheep.png*/
             gImageList->Images->Add(Image::FromFile("Wolf.jpg"));
             gImageList->Images->Add(Image::FromFile("Grass.png"));
             gImageList->Images->Add(Image::FromFile("Sheep.jpg"));
             //gImageList->Images->Add( Image::FromFile( "F:\C_project\WAS\614\WolfandSheep\WolfandSheep\Wolf.jpg" ) ); //索引0代表狼
             //gImageList->Images->Add( Image::FromFile( "F:\C_project\WAS\614\WolfandSheep\WolfandSheep\Grass.jpg" ) );//索引1代表草
             //gImageList->Images->Add( Image::FromFile( "F:\C_project\WAS\614\WolfandSheep\WolfandSheep\Sheep.jpg" ) );//索引2代表羊
             RandGrid();
         }
#pragma region
         //初始化狼和羊
void RandGrid()
{
    int size=10;
    int gridsize=(int)numGridSize->Value;
    this->pictureBox1->Controls->Clear();//清除原有图片
    //设置方格大小
    if(this->panel1->Size.Height<this->panel1->Size.Width)
    {
        size=this->panel1->Size.Height/gridsize;
        this->pictureBox1->Size = System::Drawing::Size(this->panel1->Size.Height,this->panel1->Size.Height);
        this->pictureBox1->Location = System::Drawing::Point((this->panel1->Size.Width-this->panel1->Size.Height)/2,0);
    }
    else
    {
        size=this->panel1->Size.Width/gridsize;
        this->pictureBox1->Size = System::Drawing::Size(this->panel1->Size.Width,this->panel1->Size.Width);
        this->pictureBox1->Location = System::Drawing::Point(0,(this->panel1->Size.Height-this->panel1->Size.Width)/2);
    }
    gPic=gcnew array<PictureBox^,2>(gridsize,gridsize);
    Random^ rand=gcnew Random();
    for(int i=0;i<gridsize;i++)
    {
        for(int j=0;j<gridsize;j++)
        {
            gPic[i,j]=gcnew PictureBox();  //设置图片框的属性
            gPic[i,j]->Location = System::Drawing::Point(j*size,i*size);
            gPic[i,j]->Size = System::Drawing::Size(size, size);
            gPic[i,j]->SizeMode = PictureBoxSizeMode::StretchImage;
            gPic[i,j]->BorderStyle=BorderStyle::FixedSingle;
            this->pictureBox1->Controls->Add(gPic[i,j]);
        }
        world.setGridSize(gridsize);
        int sheep=0;
        while(sheep<(int)Sheepcounts->Value)
        {
            int x = rand->Next() % gridsize;
            int y = rand->Next() % gridsize;
            if (world.getAt(x,y)==NULL) 
            {
                sheep++;
                Sheep *s= new Sheep(&world,x,y); //实例化羊对象
            }
        }
        int wolf=0;
        while (wolf <(int)Wolfcounts->Value)
        {
            int x =rand->Next() % gridsize;
            int y =rand->Next() % gridsize;
            if (world.getAt(x,y)==NULL)     
            {
                wolf++;
                Wolf *wf = new Wolf(&world,x,y); //实例化狼对象
            }
        }
    }
    display();
}
void display()
{
    for (int i=0; i<world.getGridsize(); i++)
    {
        for ( int j=0; j<world.getGridsize(); j++)
        {
            gPic[i,j]->Image=this->gImageList->Images[world.Display(i,j)];
        }
    }
}
#pragma endregion 
    private: System::Void timer1_Tick(System::Object^  sender, System::EventArgs^  e) {
                 world.SimulateOneStep();
                 display();
             }
private: System::Void btnstart_Click(System::Object^  sender, System::EventArgs^  e) {
             timer1->Enabled=true;
         }
private: System::Void btninit_Click(System::Object^  sender, System::EventArgs^  e) {
             RandGrid();
         }
private: System::Void btnstop_Click(System::Object^  sender, System::EventArgs^  e) {
             timer1->Enabled=false;

         }
private: System::Void btnclose_Click(System::Object^  sender, System::EventArgs^  e) {
             this->Close();
         }

private: System::Void numGridSize_ValueChanged(System::Object^  sender, System::EventArgs^  e) {
             Wolfcounts->Maximum=numGridSize->Value*numGridSize->Value-1;
             Sheepcounts->Maximum=Wolfcounts->Maximum;
         }
private: System::Void Wolfcounts_ValueChanged(System::Object^  sender, System::EventArgs^  e) {
             if(Wolfcounts->Value+Sheepcounts->Value>numGridSize->Value*numGridSize->Value)
             {

                 MessageBox::Show( "狼与羊的数量之和不能超过网格数！", "狼的数量有误",
                     MessageBoxButtons::OK, MessageBoxIcon::Exclamation );
             }
             Wolfcounts->Value=1;
         }
private: System::Void Sheepcounts_ValueChanged(System::Object^  sender, System::EventArgs^  e) {
             if(Sheepcounts->Value+Wolfcounts->Value>numGridSize->Value*numGridSize->Value)
             {

                 MessageBox::Show( "狼与羊的数量之和不能超过网格数！", "羊的数量有误",
                     MessageBoxButtons::OK, MessageBoxIcon::Exclamation );
                 Sheepcounts->Value=1;
             }
         }
private: System::Void Form1_SizeChanged(System::Object^  sender, System::EventArgs^  e) {
             RandGrid();
         }
};
}