為什么我不能使ToolStripMenuItem == True？ 如何檢查菜單項是否被單擊？

Question

public partial class Form1 : Form
{
    public double[] pricearray = new double[] { 20.00, 50.00, 45.00, 40.00, 
    25.00, 80.00 };
    public double shipping = 0;
    public int quant = 0;
    public double bagquant = 0;
    public double bagprice = 0;
    public double shiptotal = 0;
    public double total = 0;
    private object eventhandler;

    public Form1()

上面我聲明了公共變量

    private void fileToolStripMenuItem_Click(object sender, EventArgs e)
    {
        if (clearToolStripMenuItem.Click == true)

        { 
        double shipping = 0;
        int quant = 0;
        double bagquant = 0;
        double bagprice = 0;
        double shiptotal = 0;
        double total = 0;
        }

        if (exitToolStripMenuItem.Click = true) 
        {
            Application.Exit();
        }
    }

這是在線商店的表格。 這是為了清除用戶可能做出的任何選擇。

Answer 1

您可以將發送方轉換為工具條菜單項，然后檢查其名稱。

private void fileToolStripMenuItem_Click(object sender, EventArgs e)
{
    if (((ToolStripMenuItem)sender).Name == clearToolStripMenuItem.Name )
    { 
        double shipping = 0;
        int quant = 0;
        double bagquant = 0;
        double bagprice = 0;
        double shiptotal = 0;
        double total = 0;
        // I ASSUME YOU ARE DOING MORE THAN DECLARING LOCAL VARIABLES
    }
    else if (((ToolStripMenuItem)sender).Name == exitToolStripMenuItem.Name )
    {
        Application.Exit();
    }
}