将文本从列表视图复制到另一个winform中

本文关键字：另一个 winform 复制 视图 文本 列表 | 更新日期: 2023-09-27 18:09:56

我真的很纠结，所以我希望有人能帮忙。我有两个winform，一个有列表视图，另一个有文本框。我想检查在列表视图中检查了哪个项目，并将此文本复制到第二个表单中。我已经尝试过此代码，但它不起作用，非常感谢任何帮助！

// 1st form
private void button5_Click(object sender, EventArgs e) // Brings up the second form
{
   Form4 editItem = new Form4();
   editItem.Show();
} 
public string GetItemValue()
{
   for (int i = 0; i < listView1.Items.Count; i++)
   {
      if (listView1.Items[i].Checked == true)
      {
         return listView1.Items[i].Text;
      }
   }
   return "Error";
}
// 2nd form
private void Form4_Load(object sender, EventArgs e)
{
   Form1 main = new Form1();
   textBox1.Text = main.GetItemValue();
}

将文本从列表视图复制到另一个winform中

加载Form4后，您将在其中创建一个新的Form1。您需要参考原始Form1。这可以通过多种方式实现，最简单的方法可能是将引用传递到Form4构造函数中。

// Form 1
// This button creates a new "Form4" and shows it
private void button5_Click(object sender, EventArgs e)
{
   Form4 editItem = new Form4(this);
   editItem.Show();
} 
public string GetItemValue()
{
   for (int i = 0; i < listView1.Items.Count; i++)
   {
      if (listView1.Items[i].Checked == true)
      {
         return listView1.Items[i].Text;
      }
   }
   return "Error";
}

--

// Form 2 (Form4)
// Private member variable / reference to a Form1
private Form1 _form;
// Form4 Constructor: Assign the passed-in "Form1" to the member "Form1"
public Form4(Form1 form)
{
   this._form = form;
}
// Take the member "Form1," get the item value, and write it in the text box
private void Form4_Load(object sender, EventArgs e)
{
   textBox1.Text = this._form.GetItemValue();
}

您只需要几个更改。无需添加您自己存储所有者表单的方式，因为此功能已经存在。

private void button5_Click(object sender, EventArgs e) // Brings up the second form 
{
    Form4 editItem = new Form4();
    editItem.Show(this); //passes a reference to this form to be stored in owner
}

然后在另一个表格上引用它。

private void Form4_Load(object sender, EventArgs e)
{
    textBox1.Text = ((Form1)owner).GetItemValue();
}

尝试这种方式

FORM 1

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        //Fields
        public List<string> itemTexts;
        public Form1()
        {
            InitializeComponent();
            //Generate some items
            for (int i = 0; i < 10; i++)
            {
                ListViewItem item = new ListViewItem();
                item.Text = "item number #" + i;
                listView1.Items.Add(item);
            }
        }
        private void button1_Click(object sender, EventArgs e)
        {
            foreach (ListViewItem item in listView1.Items)
            {
                if (item.Checked)
                {
                    itemTexts.Add(item.Text);
                }
            }
            Form2 TextBoxForm = new Form2(itemTexts);
            TextBoxForm.Show();
        }

    }
}

FORM 2

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApplication2
{
    public partial class Form2 : Form
    {
        //Fields
        List<string> itemTexts;
        public Form2(List<string> itemTexts)
        {
            InitializeComponent();
            this.itemTexts = itemTexts;
            foreach (string text in itemTexts)
            {
                textBox1.Text += text + Environment.NewLine;
            }
        }    
    }
}
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