从listView中只选择一个项目

Question

我是c#的初学者.ListView当用户选择同时填充的项目名称时,我只需显示(及其子项目)的一个项目ComboBox.

我知道要使用的事件即SelectedIndexChanged事件.但我不知道该怎么做.

目前我正在使用包含XML文件和数据集的替代大流程,这使我的项目更加复杂.

里面ListView有很多东西.相同的项目名称也在ComboBox.

如果你有时间,请看看我的小项目.下载

编辑:这里" 仅显示一个项目 "意味着严格只显示一个项目,而不是选择特定项目并显示所有项目.

Answer 1

为什么不使用这段代码来获得所需的结果:

添加:

跟着这些步骤:

1. 创建一个Country类,如下所示:

   class Country
   {
       public string Name { get; set; }
       public string Flag { get; set; }
       public string Continent { get; set; }
       public string Capital { get; set; }
       public string Population { get; set; }
       public string Currency { get; set; }
   }
   

2. 根据您的要求填写国家/地区信息,如下所示:

   List<Country> countryList = new List<Country>() { 
       new Country() { Name = "India", Capital = "Delhi", Continent = "Asia", Currency = "Rupee", Population = "1.2 Billion", Flag = "india.gif" }, 
       new Country() { Name = "Pakistan", Capital = "Islamabad", Continent = "Asia", Currency = "Rupee", Population = "0,5 Billion", Flag = "pakistan.gif" }, 
       new Country() { Name = "Sri Lanka", Capital = "Kotte", Continent = "Asia", Currency = "SriLankan Rupee", Population = "20277597", Flag = "sri_lanka.gif" } 
   };
   

3. 修改*frmFlag_Load*事件,如下所示:

   private void frmFlag_Load(object sender, EventArgs e)
   {
       lvMain.Items.Clear();
       tlstrpcmbCountries.Items.Clear();
   
       tlstrpcmbCountries.Items.Add("All");
       for (int i = 0; i < countryList.Count; i++)
       {
           tlstrpcmbCountries.Items.Add(countryList[i].Name);
       }
   
       tlstrpcmbCountries.SelectedIndex = 0;
       tlstrpcmbViews.SelectedIndex = 0;
   }
   

4. 修改ComboBox和ListView的SelectedIndexChanged事件,如下所示:

   private void tlstrpcmbCountries_SelectedIndexChanged(object sender, EventArgs e)
   {
       var country = countryList.Where(c => c.Name.Equals(tlstrpcmbCountries.SelectedItem.ToString())).Select(s => s).FirstOrDefault();
   
       if (country != null)
       {
           lvMain.Items.Clear();
   
           ListViewItem item = new ListViewItem(country.Name, country.Flag);
   
           item.SubItems.Add(country.Continent);
           item.SubItems.Add(country.Capital);
           item.SubItems.Add(country.Population);
           item.SubItems.Add(country.Currency);
           lvMain.Items.Add(item);
   
           lvMain.EnsureVisible(0);
           item.Selected = true;
           item.Focused = true;
           lvMain.Select();
       }
   }
   
   private void lvMain_SelectedIndexChanged(object sender, EventArgs e)
   {
       if (lvMain.SelectedItems.Count > 0)
       {
           var selected = lvMain.SelectedItems[0];
           lblCountryName.Text = selected.SubItems[0].Text;
           lblContinent.Text = selected.SubItems[1].Text;
           lblCapitalCity.Text = selected.SubItems[2].Text;
           lblPopulation.Text = selected.SubItems[3].Text;
           lblCurrencyName.Text = selected.SubItems[4].Text;
       }
   }
   

按照这种方法,您甚至不需要匹配商品的订单.

快乐编码......