在Forms之间发送listBox数据

Question

您好我刚接触到C＃的东西我刚刚学习。

所以我的问题是我想将listBox1项Form1从Form2发送到listBox2 listBox1，并显示Form2的项目在public partial class TopliNapitki : Form { public TopliNapitki() { InitializeComponent(); } int pomozno=0; decimal cena = 0; decimal kava = 1.10m; decimal cap = 1.30m; decimal bKava = 1.60m; decimal kavaM = 1.30m; decimal caj = 1.30m; decimal kakav = 1.70m; decimal vCokolada = 1.80m; decimal lKava = 2.50m; public string _textBox1 { get { return textBox1.Text; } } public string _listBox1 { get { return listBox1.Text; } } private void button1_Click(object sender, EventArgs e) { var form1 = new Form1(); this.Close(); form1.Show(); } int stetjeKava = 1; private void button2_Click(object sender, EventArgs e) { int id=1; if (stetjeKava > 1) { listBox1.Items.RemoveAt(listBox1.SelectedIndex=id-1); listBox1.Items.Add(id + "." + "Kava" + " Cena: " + kava + "x" + stetjeKava+" " +cena); cena = cena + kava; textBox1.Text = Convert.ToString(cena); } if (stetjeKava == 1) { listBox1.Items.Add(id + "." + "Kava" + " Cena: " + kava + "x" + stetjeKava); cena = cena + kava; textBox1.Text = Convert.ToString(cena); } stetjeKava = stetjeKava + 1; pomozno = pomozno + 1; } int stetjeCap=1; private void button3_Click(object sender, EventArgs e) { int id = 2; if (stetjeCap > 1) { listBox1.Items.RemoveAt(listBox1.SelectedIndex = id - 1); listBox1.Items.Add(id + "." + "Capuccino" + " Cena: " + cap + "x" + stetjeCap + " " + cena); cena = cena + cap; textBox1.Text = Convert.ToString(cena); } if (stetjeCap == 1) { listBox1.Items.Add(id + "." + "Capuccino" + " Cena: " + cap + "x" + stetjeCap); cena = cena + cap; textBox1.Text = Convert.ToString(cena); } stetjeCap = stetjeCap + 1; } int stetjeBKava = 1; private void button4_Click(object sender, EventArgs e) { int id = 3; if (stetjeBKava > 1) { listBox1.Items.RemoveAt(listBox1.SelectedIndex = id - 1); listBox1.Items.Add(id + "." + "Bela Kava" + " Cena: " + bKava + "x" + stetjeBKava + " " + cena); cena = cena + bKava; textBox1.Text = Convert.ToString(cena); } if (stetjeBKava == 1) { listBox1.Items.Add(id + "." + "Bela Kava" + " Cena: " + bKava + "x" + stetjeBKava); cena = cena +bKava; textBox1.Text = Convert.ToString(cena); } stetjeBKava = stetjeBKava + 1; } int stetjeKavaM = 1; private void button5_Click(object sender, EventArgs e) { int id = 4; if (stetjeKavaM > 1) { listBox1.Items.RemoveAt(listBox1.SelectedIndex = id - 1); listBox1.Items.Add(id + "." + "Kava z Mlekom" + " Cena: " + kavaM + "x" + stetjeKavaM + " " + cena); cena = cena + kavaM; textBox1.Text = Convert.ToString(cena); } if (stetjeKavaM == 1) { listBox1.Items.Add(id + "." + "Kava z Mlekom" + " Cena: " + kavaM + "x" + stetjeKavaM); cena = cena + kavaM; textBox1.Text = Convert.ToString(cena); } stetjeKavaM = stetjeKavaM + 1; } int stetjeCaj = 1; private void button6_Click(object sender, EventArgs e) { int id = 5; if (stetjeCaj > 1) { listBox1.Items.RemoveAt(listBox1.SelectedIndex = id - 1); listBox1.Items.Add(id + "." + "Čaj" + " Cena: " + caj + "x" + stetjeCaj + " " + cena); cena = cena + caj; textBox1.Text = Convert.ToString(cena); } if (stetjeCaj == 1) { listBox1.Items.Add(id + "." + "Čaj" + " Cena: " + caj + "x" + stetjeCaj); cena = cena + caj; textBox1.Text = Convert.ToString(cena); } stetjeCaj = stetjeCaj + 1; } int stetjeKakav = 1; private void button7_Click(object sender, EventArgs e) { int id = 6; if (stetjeKakav > 1) { listBox1.Items.RemoveAt(listBox1.SelectedIndex = id - 1); listBox1.Items.Add(id + "." + "Kakav" + " Cena: " + kakav + "x" + stetjeKakav + " " + cena); cena = cena + kakav; textBox1.Text = Convert.ToString(cena); } if (stetjeKakav == 1) { listBox1.Items.Add(id + "." + "Kakav" + " Cena: " + kakav + "x" + stetjeKakav); cena = cena + kakav; textBox1.Text = Convert.ToString(cena); } stetjeKakav = stetjeKakav + 1; } int stetjeVCoko = 1; private void button8_Click(object sender, EventArgs e) { int id = 7; if (stetjeVCoko > 1) { listBox1.Items.RemoveAt(listBox1.SelectedIndex = id - 1); listBox1.Items.Add(id + "." + "Vroča čokolada" + " Cena: " + vCokolada + "x" + stetjeVCoko + " " + cena); cena = cena + vCokolada; textBox1.Text = Convert.ToString(cena); } if (stetjeVCoko == 1) { listBox1.Items.Add(id + "." + "Vroča čokolada" + " Cena: " + vCokolada + "x" + stetjeVCoko); cena = cena + vCokolada; textBox1.Text = Convert.ToString(cena); } stetjeVCoko = stetjeVCoko + 1; } int stetjeLKava = 1; private void button9_Click(object sender, EventArgs e) { int id = 8; if (stetjeLKava > 1) { listBox1.Items.RemoveAt(listBox1.SelectedIndex = id - 1); listBox1.Items.Add(id + "." + "Ledena kava" + " Cena: " + lKava + "x" + stetjeLKava + " " + cena); cena = cena + lKava; textBox1.Text = Convert.ToString(cena); } if (stetjeLKava == 1) { listBox1.Items.Add(id + "." + "Ledena kava" + " Cena: " + lKava + "x" + stetjeLKava); cena = cena + lKava; textBox1.Text = Convert.ToString(cena); } stetjeLKava = stetjeLKava + 1; } private void button10_Click(object sender, EventArgs e) { var form1 = new Racun(); form1.Show(); form1._textBox = _textBox1; form1._listBox = _listBox1; this.Close(); form1.Show(); } } } 。

Im来自斯洛文尼亚，因此更新了表格名称和其他条目

这是第一个名为：

的表格

    public partial class Racun : Form
{
    public Racun()
    {
        InitializeComponent();     
    }

    private void button1_Click(object sender, EventArgs e)
    {
        var form1 = new Form1();
        this.Close();
        form1.Show();  
    }

    public string _textBox
    {
        set { textBox1.Text = value; }
    }

    public string _listBox
    {
        set { listBox1.Items.Add(value); }
    }
}

第二个表格：

    public string _listBox1
    {
        get { return listBox1.Text; }
    } 

    private void button10_Click(object sender, EventArgs e)
    {
        var form1 = new Racun();
        form1.Show();
        form1._listBox = _listBox1;
        this.Close();
        form1.Show();  
    }

}

我有这个设置用于发送listBox的数据，但它在Form1上不起作用：

    public string _listBox
    {
        set { listBox1.Items.Add(value); }
    }

Form2中有这个：

{{1}}

Answer 1

传递构造函数中的值：

string _listValue;
public Racun(string listValue)
{
    InitializeComponent(); 
    _listValue = listValue;
}

它将被称为：

private void button1_Click(object sender, EventArgs e)
{
    var form1 = new Rancun(_listBox);
    this.Close();
    form1.Show();  
}

我还认为您在尝试从列表框中取出所选项目时遇到错误。它应该像这样调用：

get { return listBox1.SelectedValue.ToString(); }