SelectedItem的dropdownlist属性ASP.NET

如果我有一个表，包括列Id，Name，Attack，SortOfWeapon。并在下拉列表中输入Text =“Name”和Value =“Id”。当我点击按钮，我可以采取SelectedItem（国家和邮编）的其他属性？SelectedItem的dropdownlist属性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); 

    }

当用户选择项目并单击按钮时，必须在该函数中提供所选项目的属性值。

来源

2016-10-03 cruim

请访问http：/ /stackoverflow.com/questions/38150214/asp-net-how-to-create-cascading-dropdownlists-boxes-using-single-data-table/39230066#39230066？你的问题看起来相似 – VDWWD

你的意思是采取其他的值是什么？您是否在寻找级联下拉菜单（因此您先选择一个项目，然后用相关数据填充另一项目），或者您是否希望选择下拉列表中的项目，然后访问所有属性选择的项目？如果代码示例是关于武器的，为什么要写地址问题呢？让任何人都难以给你一个相关的例子！ – Matt

@VDWWD对不起，但我不明白你的例子。我怎么能适用于selectedItem的属性？在webforms中，如果我使用List <>作为DataSourse，我可以应用于SelectedItem的所有属性。 – cruim

我认为你正在寻找（确保虽然不是100％），这样的事情

在aspx页面：

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

在后面的代码：

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; } 
    }

来源

2016-10-03 18:44:47 VDWWD

似乎这就是我要找的，谢谢！（抱歉，我不能投票给你的答案低回购） – cruim

SelectedItem的dropdownlist属性ASP.NET

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