在每個按鈕上點擊圖片循環的兩個圖片框點擊

Question

當我說我是一個初學者時，我真的很新鮮，因爲您可以在前面道歉！

我想要做的是在窗體中有兩個圖片框和一個按鈕。當我點擊該按鈕，它從我的圖片文件夾中選取2倍新的圖像，它會做這個一共有5次

任何想法我如何處理這一點 - 這是我到目前爲止的按鈕，點擊

private void button1_Click(object sender, EventArgs e) 
    { 
     pictureBox1.Load(@"C:\Resources\PICT01.JPG"); 
     pictureBox2.Load(@"C:\Resources\PICT02.JPG"); 
} 

任何答案真的需要基本的，因爲我只是在學習！在此先感謝

Answer 1

您需要創建一個全局int來跟蹤您切換圖片的頻率，並在button1_click中處理該數字。

我不是專家我自己，但這是我將如何做到這一點。一個開關是理想的，因爲你需要檢查5種不同的可能性。

//global int 
int count = 0; 

private void button1_Click(object sender, EventArgs e) 
{ 
    count++; 
    switch(count) 
    { 
    case 1: 
     //load image 1 and 2 
     break; 
    case 2: 
     //load image 3 and 4 
     break; 
    case 3: 
     //load image 5 and 6 
     break; 
    case 4: 
     //load image 7 and 8 
     break; 
    case 5: 
     //load image 9 and 10 
     break; 
    default: 
     break; 
    } 
} 

Answer 2

此示例程序將創建MyPictures文件夾中的所有JPG格式文件的列表，從列表中隨機挑選的圖片，當列表爲空，將引發異常。

public Form1() 
{ 
    // Reading pictures from My Pictures: 
    string path = Environment.GetFolderPath(Environment.SpecialFolders.MyPictures); 
    DictionaryInfo myPictures = new DictionaryInfo(path); 
    FPictureFiles = myPictures.GetFiles("*.jpg", SearchOption.AllDirectories).ToList(); 
} 
private List<FileInfo> FPictureFiles; 
private Random FRandom = new Random(); 

private void button1_Click(object sender) 
{ 
    pictureBox1.Load(PickFile()); 
    pictureBox2.Load(PickFile()); 
} 

private string PickFile() 
{ 
    if (FPictureFiles.Count == 0) throw new Exception("No more picture files"); 

    int index = FRandom.Next(FPictureFiles.Count); 
    string filename = FPictureFiles[index].FullName; 
    FPictureFiles.RemoveAt(index); 
    return filename; 
} 

我希望這會幫助你在你的追求。

Answer 3

您可以嘗試創建一個新的List<string>，其中列出了具有所選內容的特定擴展名的所有文件。然後，初始化一個新的Random類，該類在特定範圍內獲得一個隨機數，考慮到該範圍不會超過我們的List<string>.Count值。

例

假設CurrentClicks確定一個新的整數和MaximumClicks是我們的最大價值

public Form1() 
{ 
    InitializeComponent(); 
    button1.Click += new EventHandler(button1_Click); //Link the Click event of button1 to button1_Click 
} 

const int MaximumClicks = 5; //Initialize a new constant int of value 5 named MaximumClicks 
int CurrentClicks = 0; //Initialize a new variable of name CurrentClicks as an int of value 0 

以下情況可適用

private void button1_Click(object sender, EventArgs e) 
{ 
    if (CurrentClicks < MaximumClicks) //Continue if CurrentClicks is less than 5 
    { 
     string FilesPath = @"D:\Resources\International"; //Replace this with the targeted folder 
     string FileExtensions = "*.png"; //Applies only to .png file extensions. Replace this with your desired file extension (jpg/bmp/gif/etc) 
     List<string> ItemsInFolder = new List<string>(); //Initialize a new Generic Collection of name ItemsInFolder as a new List<string> 
     foreach (string ImageLocation in Directory.GetFiles(FilesPath, FileExtensions)) //Get all files in FilesPath creating a new string of name ImageLocation considering that FilesPath returns a directory matching FileExtensions considering that FileExtensions returns a valid file extension within the targeted folder 
     { 
      ItemsInFolder.Add(ImageLocation); //Add ImageLocation to ItemsInFolder 
     } 
     Random Rnd = new Random(); //Initialize a new Random class of name Rnd 
     int ImageIndex = Rnd.Next(0, ItemsInFolder.Count); //Initialize a new variable of name ImageIndex as a random number from 0 to the items retrieved count 
     pictureBox1.Load(ItemsInFolder[ImageIndex]); //Load the random image based on ImageIndex as ImageIndex belongs to a random index in ItemsInFolder 
     CurrentClicks++; //Increment CurrentClicks by 1 
    } 
    else 
    { 
     //Do Something (MaximumClicks reached) 
    } 
} 

這將讓內的文件位置提供與指定擴展名匹配的文件夾然後，從收集的文件位置中加載一個隨機文件，名稱爲pictureBox1的PictureBox。

但是，這將不會避免以前添加到PictureBox的文件。如果你想避免重複，你可以創建一個新的int陣列或List<int>，並添加每ImageIndex已應用到PictureBox但建議去與List<int>，因爲它似乎更容易管理

例

List<int> AlreadyAdded = new List<int>(); 
redo: 
    Random Rnd = new Random(); 
    int ImageIndex = Rnd.Next(0, ItemsInFolder.Count); 
    if (AlreadyAdded.Contains(ImageIndex)) //Continue within this block if the item already exists in AlreadyAdded 
    { 
     goto redo; 
    }     
    AlreadyAdded.Add(ImageIndex); //Add ImageIndex to AlreadyAdded 

謝謝，
我希望對您有所幫助:)