C#傳值方式實現不同程序窗體間通信實例

2020-01-24 03:02:06

字體：大中小

來源：轉載

供稿：網友

當Form2的AcceptChange按鈕按下，需要修改Form1中ListBox中相應列的值，因此可以考慮同時將Form1中的ListBox控件當參數也傳入Form2，所有修改工作都在Form2中完成，根據這個思路，Form2代碼如下：

publicpartial class Form2 : Form     
    {     
        private string text;     
        private ListBox lb;     
        private int index;     

       //構造函數接收三個參數：選中行文本，ListBox控件，選中行索引     
        public Form2(string text,ListBox lb,int index)     
        {     
            this.text = text;     
            this.lb = lb;     
            this.index = index;     
            InitializeComponent();     
            this.textBox1.Text = text;     
        }     

        private void btnChange_Click(object sender, EventArgs e)     
        {                
            string text = this.textBox1.Text;     
            this.lb.Items.RemoveAt(index);     
            this.lb.Items.Insert(index, text);     
            this.Close();     
        }     
    }

Form1中new窗體2時這么寫：

復制代碼代碼如下:

public partial class Form1 :Form     
    {     
        int index = 0;     
        string text = null;     
        public Form1()     
        {     
            InitializeComponent();     
        }     

        private void listBox1_SelectedIndexChanged(object sender, EventArgse)     
        {                 
            if (this.listBox1.SelectedItem != null)     
            {     
                text = this.listBox1.SelectedItem.ToString();     
                index = this.listBox1.SelectedIndex;     

               //構造Form2同時傳遞參數     
                Form2 form2 = new Form2(text, listBox1, index);     
                form2.ShowDialog();     
            }     
       }