Question

public void ItemGot()
{
    number = number + 1;            //Increment by 1
    quantity.Text = ("x" + number); //Overwrite Text
    quantity.Refresh();             //Updates the text
}

您好，我上面有这个代码。运行此方法时，我之前设置的标签文本应将文本更改为我在下面设置的文本。但是，它没有这样做。此外，通过在Visual Studio中设置断点，我已确定：

正在调用该方法，
正在递增数字。

没有理由说这不起作用，因为程序认识到number正在增加一个。我的朋友说了一个类似的问题here。仍然没有帮助，现在代码已经过时了。请帮忙！

编辑：我如何添加quantity标签

首先，我在构造函数中初始化它：public Label quantity;

然后我这样做了：quantity = new Label();

最后，在另一种方法中，我给了quantity以下属性：

quantity.Size = new Size(24, 24);
quantity.Text = ("x" + number);

quantity.Left = 48;

Controls.Add(quantity);

number也在构造函数中，并设置为0。

编辑2 ：我将发布我的整个方法

    public InventoryScreen()
    {
        btnItems = new Button();
        quantity = new Label();

        //call the methods for spawning the buttons 
        ButtonGenItems(cNumber, btnItems, quantity);

        InitializeComponent();
    }

    public void InventoryScreen_Load(object sender, EventArgs e)
    {

    }

    #region ButtonGenItems Method
    public void ButtonGenItems(int cNumber, Button btnItems,Label quantity)
    {
        int xPos = 126;
        int yPos = 25;

        for (int n = 0; n < 1; n++)
        {
            btnItems.Tag = n;
            btnItems.Size = new Size(48, 52);  //Button size X and Y
            btnItems.BackColor = Color.CornflowerBlue;

            quantity.Size = new Size(24, 24);
            quantity.Text = ("x" + number);

            if (yPos > 60) // Five Buttons in one column
            {
                yPos = 25; //spawn position Y
                xPos = xPos + btnItems.Width + 10; //spacing X
            }

            btnItems.Left = xPos; //Start Button spawn at the Left side
            btnItems.Top = yPos;  //Start spawn at the top side

            quantity.Left = 48;
            quantity.Top = 60;

            yPos = yPos + btnItems.Height + 10;

            btnItems.Text = "Use";

            Controls.Add(btnItems); //place Buttons
            Controls.Add(quantity);

            // the Event of click Button
            //btnItems.Click += new System.EventHandler(ItemUse); //to be implimented
        }
    }

    #endregion

    public void ItemGot()
    {
        //*Interestingly, the program recognizes that 'number' is increasing by 1, but label won't update the text
        //Furthermore, pressing the actual button will trigger the text update, but simulating a buttonclick WONT DO ANYTHING 

        Console.WriteLine("Text should now increment by 1");  //Debugging to test method
        number = number + 1;            //Increment by 1
        quantity.Text = ("x" + number); //Overwrite Text
    }
}

2.5 这是调用方法的方法。此方法位于另一个类

public void Update(Vector2 pos)
        {
            this.position = pos; //get char position
            Inv = new InventoryScreen(); //create instance of object
            charRange = new Rectangle((int)position.X, (int)position.Y, 64, 57); //create rectangle


            //Intersection Code, If the character intersects with the item while the item is showing, run below
            if (alive && charRange.Intersects(itemRect))
            {
                alive = false; //stop showing the item
                Inv.ItemGot(); //Call the ItemGot class, which adds the item to the inventory screen
            }
        }

Answer 1

据我了解，当您调用InventoryScreen方法时，您已经打开/显示了表单（类Update的实例）和您的标签，但是......

在方法Update内部，您创建了InventoryScreen的新实例，并使用此新的表单实例调用函数ItemGot。

我认为您需要在方法InventoryScreen中传递当前Update实例的引用，然后使用该引用调用ItemGot方法

public void Update(Vector2 pos, InventoryScreen invscreen)
{
    this.position = pos;
    charRange = new Rectangle((int)position.X, (int)position.Y, 64, 57);

    if (alive && charRange.Intersects(itemRect))
    {
        alive = false;
        invscreen.ItemGot(); 
    }
}

标签文字未更新

1 个答案: