в 15:30, 26 мая 2010

2010-05-26T15:30:47Z

Admin: 1 версия

2010-05-26T11:51:23Z

1 версия

Новая страница

==Define and use Hashtable (VB.net)==



<source lang="csharp">
<%@ Page Language="VB" %>
<script runat="server">
Dim ColorList(6) as String
Dim FontList as new ArrayList()
Dim QuoteList as new Hashtable()

Sub Page_Load
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")

QuoteList.Add ("Quotation", "Quotation. ")
QuoteList.Add ("Joke", "Joke")
QuoteList.Add ("Wisdom", "Wisdom")
QuoteList.Add ("Saying", "Saying")

If Not Page.IsPostback
Dim ColorName as String

For Each ColorName in ColorList
ddlColorList.Items.Add(ColorName)
Next

ddlFontList.DataSource = FontList
ddlFontList.DataBind()

ddlQuoteList.DataSource = QuoteList.Keys
ddlQuoteList.DataBind()

End If
End Sub

Sub btnSelectColor_Click(sender As Object, e As EventArgs)
lblOutputMessage.Text = QuoteList(ddlQuoteList.SelectedItem.Text)
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>
Finally, choose your output message:
<asp:DropDownList id="ddlQuoteList" runat="server"></asp:DropDownList>
</p>
<p>
 <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>

</source>

==For Each loop through a Hashtable (VB.net)==



<source lang="csharp">
<%@Page language="vb" debug="true" %>
<script runat="server" language="vb">
Sub Page_Load(Source As Object, E as EventArgs)
Dim myHashTable as new Hashtable
Dim Item As DictionaryEntry
myHashTable("UK") = "United Kingdom"
myHashTable("US") = "United States"
myHashTable("DE") = "Germany"
If Not Page.IsPostback Then
For Each Item In myHashtable
Dim newListItem As new ListItem()
newListItem.Text = Item.Value
newListItem.Value = Item.Key
myDropDownList.Items.Add(newListItem)
Next
End If
End Sub
Sub Click(Source As Object, E as EventArgs)
myLabel.Text = myDropDownList.SelectedItem.Value
End Sub
</script>
<html>
<form runat="server">
<asp:dropdownlist id="myDropDownList" runat="server" />
<asp:button id="myButton" runat="server" text="OK" Onclick="Click" />
<br /><br />
<asp:Label id="myLabel" runat="server" text="" />
</form>
</html>

</source>

==For each statement for Hashtable (C#)==



<source lang="csharp">
<%@Page Language="c#" debug="true" %>
<script runat="server" Language="c#">
void Page_Load(object source, EventArgs e)
{
Hashtable myHashtable = new Hashtable();
myHashtable["UK"] = "United Kingdom";
myHashtable["US"] = "United States";
myHashtable["DE"] = "Germany";
if (!(Page.IsPostBack))
{
foreach (DictionaryEntry Item in myHashtable)
{
ListItem newListItem = new ListItem();
newListItem.Text = Item.Value.ToString();
newListItem.Value = Item.Key.ToString();
myDropDownList.Items.Add(newListItem);
}
}
}
void Click(object source, EventArgs e)
{
myLabel.Text = myDropDownList.SelectedItem.Value;
}
</script>
<html>
<form runat="server">
<asp:dropdownlist id="myDropDownList" runat="server" />
<asp:button id="myButton" runat="server" text="OK" Onclick="Click" />
<br /><br />
<asp:Label id="myLabel" runat="server" text="" />
</form>
</html>

</source>

==Hash table: Date key and string value (C#)==



<source lang="csharp">
<%@ Page Language="C#" %>
<script runat="server">

void Page_Load(){
Hashtable myHashtable = new Hashtable();
myHashtable[Convert.ToDateTime("1/1/2005")] = "Event on January 1st 2005";

string CountryName;
CountryName = Convert.ToString(myHashtable[Convert.ToDateTime("1/1/2005")]);
lblOut.Text = CountryName;
}

</script>
<html>
<head>
</head>
<body>
<form runat="server">
<asp:Label runat="server" ID = "lblOut">Label</asp:Label>
</form>
</body>
</html>

</source>

==Hashtable: int key and string value (C#)==



<source lang="csharp">
<%@ Page Language="C#" %>
<script runat="server">

void Page_Load(){
Hashtable myHashtable = new Hashtable();
myHashtable[1] = "Canada Post";

string CountryName;
CountryName = Convert.ToString(myHashtable[1]);
lblOut.Text = CountryName;
}

</script>
<html>
<head>
</head>
<body>
<form runat="server">
<asp:Label runat="server" ID = "lblOut">Label</asp:Label>
</form>
</body>
</html>

</source>

==Hash table Key is case sensitive (C#)==



<source lang="csharp">
<%@ Page Language="C#" %>
<script runat="server">

void Page_Load(){
Hashtable myHashtable = new Hashtable();
myHashtable["UK"] = "United Kingdom";

string CountryName;
CountryName = Convert.ToString(myHashtable["uk"]);
lblOut.Text = CountryName;
}

</script>
<html>
<head>
</head>
<body>
<form runat="server">
<asp:Label runat="server" ID = "lblOut">Label</asp:Label>
</form>
</body>
</html>

</source>

==Hashtable: string key and string value (C#)==



<source lang="csharp">
<%@ Page Language="C#" %>
<script runat="server">

void Page_Load(){
Hashtable myHashtable = new Hashtable();
myHashtable["UK"] = "United Kingdom";

string CountryName;
CountryName = Convert.ToString(myHashtable["UK"]);
lblOut.Text = CountryName;
}

</script>
<html>
<head>
</head>
<body>
<form runat="server">
<asp:Label runat="server" ID = "lblOut">Label</asp:Label>
</form>
</body>
</html>

</source>

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ASP.Net/Collections/Hashtable - История изменений

в 15:30, 26 мая 2010

Admin: 1 версия