ASP.Net/Collections/ArrayList

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ArrayList: insert value by index (VB.net)

<%@Page language="vb" %>
<script runat="server" language="vb">
Sub Page_Load()
    Dim AnimalArrayList as new ArrayList()
    AnimalArrayList.Add("Dog")
    AnimalArrayList.Add("Cat")
    AnimalArrayList.Add("Elephant")
    AnimalArrayList.Add("Lion")
    AnimalArrayList.Add("Cat")
    AnimalArrayList.Insert(2,"Platypus")
    MyDropDownList.DataSource = AnimalArrayList
    MyDropDownList.DataBind()
End Sub
</script>
<html>
<form id="Form1" method="post" runat="server">
<asp:dropdownlist id="MyDropDownList" runat="server" />
</form>
</html>



ArrayList: remove item by index (VB.net)

<%@Page language="vb" %>
<script runat="server" language="vb">
Sub Page_Load()
    Dim AnimalArrayList as new ArrayList
    AnimalArrayList.Add("Dog")
    AnimalArrayList.Add("Cat")
    AnimalArrayList.Add("Elephant")
    AnimalArrayList.Add("Lion")
    AnimalArrayList.Add("Cat")
    AnimalArrayList.Add("Platypus")
    AnimalArrayList.Insert(1,"Chicken")
    AnimalArrayList.Remove("Cat")
    AnimalArrayList.RemoveAt(0)
    MyDropDownList.DataSource = AnimalArrayList
    MyDropDownList.DataBind()
End Sub
</script>
<html>
<form id="Form1" method="post" runat="server">
<asp:dropdownlist id="MyDropDownList" runat="server" />
</form>
</html>



ArrayList: remove item (VB.net)

<%@Page language="vb" %>
<script runat="server" language="vb">
Sub Page_Load()
    Dim AnimalArrayList as new ArrayList
    AnimalArrayList.Add("Dog")
    AnimalArrayList.Add("Cat")
    AnimalArrayList.Add("Elephant")
    AnimalArrayList.Add("Lion")
    AnimalArrayList.Add("Cat")
    AnimalArrayList.Add("Platypus")
    AnimalArrayList.Insert(1,"Chicken")
    AnimalArrayList.Remove("Cat")
    AnimalArrayList.RemoveAt(0)
    MyDropDownList.DataSource = AnimalArrayList
    MyDropDownList.DataBind()
End Sub
</script>
<html>
<form id="Form1" method="post" runat="server">
<asp:dropdownlist id="MyDropDownList" runat="server" />
</form>
</html>



Bind arrayList to asp:dropdownlist (C#)

<%@Page Language="c#" %>
<script runat="server" Language="c#">
  void Page_Load() 
  {
    ArrayList AnimalArrayList = new ArrayList();
    AnimalArrayList.Add("Dog");
    AnimalArrayList.Add("Cat");
    AnimalArrayList.Add("Elephant");
    AnimalArrayList.Add("Lion");
    AnimalArrayList.Add("Cat");
    MyDropDownList.DataSource = AnimalArrayList;
    MyDropDownList.DataBind();
}
</script>
<html>
<form id="Form1" method="post" runat="server">
  <asp:dropdownlist id="MyDropDownList" runat="server" />
</form>
</html>



Inset element to ArrayList by index (C#)

<%@Page Language="c#" %>
<script runat="server" Language="c#">
  void Page_Load()  
  {
    ArrayList AnimalArrayList = new ArrayList();
    AnimalArrayList.Add("Dog");
    AnimalArrayList.Add("Cat");
    AnimalArrayList.Add("Elephant");
    AnimalArrayList.Add("Lion");
    AnimalArrayList.Add("Cat");
    AnimalArrayList.Add("Platypus");
    AnimalArrayList.Insert(1,"Chicken");
    AnimalArrayList.Remove("Cat");
    AnimalArrayList.RemoveAt(0);
    MyDropDownList.DataSource = AnimalArrayList;
    MyDropDownList.DataBind();
}
</script>
<html>
<form id="Form1" method="post" runat="server">
<asp:dropdownlist id="MyDropDownList" runat="server" />
</form>
</html>



Remove object from ArrayList by Index (C#)

<%@Page Language="c#" %>
<script runat="server" Language="c#">
  void Page_Load()  
  {
    ArrayList AnimalArrayList = new ArrayList();
    AnimalArrayList.Add("Dog");
    AnimalArrayList.Add("Cat");
    AnimalArrayList.Add("Elephant");
    AnimalArrayList.Add("Lion");
    AnimalArrayList.Add("Cat");
    AnimalArrayList.Add("Platypus");
    AnimalArrayList.Insert(1,"Chicken");
    AnimalArrayList.Remove("Cat");
    AnimalArrayList.RemoveAt(0);
    MyDropDownList.DataSource = AnimalArrayList;
    MyDropDownList.DataBind();
}
</script>
<html>
<form id="Form1" method="post" runat="server">
<asp:dropdownlist id="MyDropDownList" runat="server" />
</form>
</html>



Remove object from ArrayList (C#)

<%@Page Language="c#" %>
<script runat="server" Language="c#">
  void Page_Load()  
  {
    ArrayList AnimalArrayList = new ArrayList();
    AnimalArrayList.Add("Dog");
    AnimalArrayList.Add("Cat");
    AnimalArrayList.Add("Elephant");
    AnimalArrayList.Add("Lion");
    AnimalArrayList.Add("Cat");
    AnimalArrayList.Add("Platypus");
    AnimalArrayList.Insert(1,"Chicken");
    AnimalArrayList.Remove("Cat");
    AnimalArrayList.RemoveAt(0);
    MyDropDownList.DataSource = AnimalArrayList;
    MyDropDownList.DataBind();
}
</script>
<html>
<form id="Form1" method="post" runat="server">
<asp:dropdownlist id="MyDropDownList" runat="server" />
</form>
</html>



Use array and ArrayList (VB.net)

<%@ Page Language="VB" %>
<script runat="server">
    Dim ColorList(6) as String
    Dim FontList as new ArrayList()
    
    Sub Page_Load
      " Add the colors to the array
      ColorList(0) = "Red"
      ColorList(1) = "Orange"
      ColorList(2) = "Yellow"
      ColorList(3) = "Green"
      ColorList(4) = "Blue"
      ColorList(5) = "Indigo"
      ColorList(6) = "Violet"
    
      FontList.Add("Times New Roman")
      FontList.Add("Arial")
      FontList.Add("Verdana")
      FontList.Add("Comic Sans MS")
    
      If Not Page.IsPostback
        Dim ColorName as String
    
        For Each ColorName in ColorList
          ddlColorList.Items.Add(ColorName)
        Next
    
        ddlFontList.DataSource = FontList
        ddlFontList.DataBind()
    
      End If
    End Sub
    
    Sub btnSelectColor_Click(sender As Object, e As EventArgs)
      lblOutputMessage.Text = "You selected " & _
        ddlColorList.SelectedItem.Value & " text written in " & _
        ddlFontList.SelectedItem.Value
      lblOutputMessage.ForeColor = _
        System.Drawing.Color.FromName(ddlColorList.SelectedItem.Text)
      lblOutputMessage.Font.Name = _
        ddlFontList.SelectedItem.Text
    
    End Sub
</script>
<html>
<head>
</head>
<body>
    <form runat="server">
        <p>
            Select a color from the list:<asp:DropDownList id="ddlColorList" runat="server"></asp:DropDownList>
        </p>
        <p>
            Then select a font sytle from the list: 
            <asp:DropDownList id="ddlFontList" runat="server"></asp:DropDownList>
        </p>
        <p>
            &nbsp;<asp:Button id="btnSelectColor" onclick="btnSelectColor_Click" runat="server" Text="Click here!"></asp:Button>
        </p>
        <p>
            <asp:Label id="lblOutputMessage" runat="server"></asp:Label>
        </p>
    </form>
</body>
</html>



Use ArrayList to fill dropdown value (C#)

<%@ Page Language="C#" Debug="true" %>
<script runat="server">
    void Page_Load()
    {
         ArrayList list = new ArrayList();
         list.Add("none");
         list.Add("Canada Post");
         list.Add("UPS");
    
         list.Insert(1,"FedEx");
    
         MyDropDownList.DataSource = list;
         MyDropDownList.DataBind();
    }
</script>
<html>
<head>
    <title>ArrayList Example</title>
</head>
<body>
    <form id="Form1" method="post" runat="server">
        <asp:dropdownlist id="MyDropDownList" runat="server"></asp:dropdownlist>
    </form>
</body>
</html>
Источник — «http://nfex.ru/index.php?title=ASP.Net/Collections/ArrayList&oldid=1755»