SelectedItem的dropdownlist屬性ASP.NET

如果我有一個表，包括列Id，Name，Attack，SortOfWeapon。並在下拉列表中輸入Text =「Name」和Value =「Id」。當我點擊按鈕，我可以採取SelectedItem（國家和郵編）的其他屬性？SelectedItem的dropdownlist屬性ASP.NET

protected void Page_Load(object sender, EventArgs e) 
    { 
     foreach (Weapon weapon in GetWeapons()) 
     { 
      DropDownListOfWeapon.Items.Add(weapon.Name); 
     } 

    } 
protected IEnumerable<Weapon> GetWeapons() 
    { 
     return weaponRepository.Weapons 
      .OrderBy(a => a.Name); 

    }

當用戶選擇項目並單擊按鈕時，必須在該函數中提供所選項目的屬性值。

來源

2016-10-03 cruim

請訪問http：/ /stackoverflow.com/questions/38150214/asp-net-how-to-create-cascading-dropdownlists-boxes-using-single-data-table/39230066#39230066？你的問題看起來相似 – VDWWD

你的意思是採取其他的值是什麼？您是否在尋找級聯下拉菜單（因此您先選擇一個項目，然後用相關數據填充另一項目），或者您是否希望選擇下拉列表中的項目，然後訪問所有屬性選擇的項目？如果代碼示例是關於武器的，爲什麼要寫地址問題呢？讓任何人都難以給你一個相關的例子！ – Matt

@VDWWD對不起，但我不明白你的例子。我怎麼能適用於selectedItem的屬性？在webforms中，如果我使用List <>作爲DataSourse，我可以應用於SelectedItem的所有屬性。 – cruim

我認爲你正在尋找（確保雖然不是100％），這樣的事情

在aspx頁面：

<asp:DropDownList ID="DropDownListOfWeapon" runat="server" OnSelectedIndexChanged="DropDownListOfWeapon_SelectedIndexChanged" AutoPostBack="true"></asp:DropDownList> 
    <br /><br /> 
    <asp:Literal ID="Literal1" runat="server"></asp:Literal>

在後面的代碼：

protected void Page_Load(object sender, EventArgs e) 
    { 
     //check for postback 
     if (!IsPostBack) 
     { 
      //fill the dropdown 
      DropDownListOfWeapon.DataSource = GetWeapons(); 
      DropDownListOfWeapon.DataTextField = "Name"; 
      DropDownListOfWeapon.DataValueField = "Id"; 
      DropDownListOfWeapon.DataBind(); 

      //add a select text at the first position 
      DropDownListOfWeapon.Items.Insert(0, new ListItem("Select a weapon", "-1", true)); 
     } 
    } 

    private List<Weapon> GetWeapons() 
    { 
     //create a new list 
     List<Weapon> weaponList = new List<Weapon>(); 

     //fill the list with dummy weapons 
     //this probly would come from a database or other external source 
     for (int i = 0; i < 10; i++) 
     { 
      Weapon weapon = new Weapon(); 
      weapon.Id = i; 
      weapon.Name = "Weapon " + i; 
      weapon.Attack = "Attack " + i; 
      weapon.SortOfWeapon = "Sort of weapon " + i; 
      weaponList.Add(weapon); 
     } 

     //sort the list alphabetically 
     weaponList = weaponList.OrderBy(x => x.Name).ToList(); 

     return weaponList; 
    } 

    protected void DropDownListOfWeapon_SelectedIndexChanged(object sender, EventArgs e) 
    { 
     //get the id from the dropdown 
     int Id = Convert.ToInt32(DropDownListOfWeapon.SelectedValue); 

     if (Id < 0) 
     { 
      //clear the literal when no selection is made 
      Literal1.Text = ""; 
     } 
     else 
     { 
      //get the correct weapon from the list based on it's id using Linq 
      List<Weapon> weaponList = GetWeapons().Where(x => x.Id == Id).ToList(); 

      //show the properties in the literal 
      Weapon weapon = weaponList[0]; 
      Literal1.Text = weapon.Id + "<br />"; 
      Literal1.Text += weapon.Name + "<br />"; 
      Literal1.Text += weapon.Attack + "<br />"; 
      Literal1.Text += weapon.SortOfWeapon + "<br />"; 
     } 
    } 

    //the weapon class 
    class Weapon 
    { 
     public int Id { get; set; } 
     public string Name { get; set; } 
     public string Attack { get; set; } 
     public string SortOfWeapon { get; set; } 
    }

來源

2016-10-03 18:44:47 VDWWD

似乎這就是我要找的，謝謝！（抱歉，我不能投票給你的答案低迴購） – cruim

SelectedItem的dropdownlist屬性ASP.NET

回答

相關問題