如何清除重复数据C＃ [英] How to clear duplicate data C#

问题描述

当我在列表视图中有项目时，想要创建一个表单来编辑它。在我编辑后，我点击返回旧表格，项目被编辑，但当我再次点击返回表格编辑时，它有旧的和新的数据。



我尝试过：

When I have items in a listview, and want to make a form to edit it. after I edited I click back to old form the items are edited but when I click back to form edit again it has the old one and new data one.

What I have tried:

public static ListView lstView = new ListView();
      // public static ListView lst_View = new ListView();
       private void btnEdit_Click(object sender, EventArgs e)
       {
           if (lstView1.Items.Count > 0)
           {
               frmEdit Frm = new frmEdit();

               ListViewItem itemClone;
               ListView.ListViewItemCollection temp = lstView1.Items;
               foreach (ListViewItem item in temp)
               {
                   itemClone = item.Clone() as ListViewItem;
                   lstView1.Items.Remove(itemClone);
                   lstView.Items.Add(itemClone);

               }


               Frm.Show();

               this.Hide();

           }

推荐答案

很明显，您的旧数据存储在某处并持续到第二形成。您需要清理代码



您还可以使用Set类来维护唯一的项目列表

Clearly your old data is stored somewhere and going through to the second form. You need to clean up your code

You can also use a Set class to maintain a unique list of items

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