C#传值方式实现不同程序窗体间通信实例

2020-01-24 03:02:06

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当Form2的AcceptChange按钮按下，需要修改Form1中ListBox中相应列的值，因此可以考虑同时将Form1中的ListBox控件当参数也传入Form2，所有修改工作都在Form2中完成，根据这个思路，Form2代码如下：

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

       //构造函数接收三个参数：选中行文本，ListBox控件，选中行索引     
        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窗体2时这么写：

复制代码代码如下:

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;     

               //构造Form2同时传递参数     
                Form2 form2 = new Form2(text, listBox1, index);     
                form2.ShowDialog();     
            }     
       }