ASP.Net/Asp Control/Image

Материал из .Net Framework эксперт
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asp:image: change image dynamically

<%@ Page Language=VB Debug=true %>
<script runat=server>
Sub Page_Load(ByVal Sender as Object, ByVal E as EventArgs)
    If Not IsPostBack Then
        imgToView.AlternateText = "Image 1"
        imgToView.ImageUrl = "http://www.nfex.ru/style/download.png"
    End If
End Sub
Sub SubmitBtn_Click(Sender As Object, E As EventArgs)
    imgToView.AlternateText = ddlImages.SelectedItem.Text
    imgToView.ImageUrl = ddlImages.SelectedItem.Value
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE>Creating a Basic Image Control</TITLE>
</HEAD>
<form runat="server">
<BR><BR>
Select an image to display:<BR>
<asp:dropdownlist
    id="ddlImages" 
    runat=server 
>
    <asp:listitem text="Image 1" value="http://www.nfex.ru/style/download.png"/>
    <asp:listitem text="Image 2" value="http://www.nfex.ru/style/logo.png"/>
    <asp:listitem text="Image 3" value="http://www.nfex.ru/style/download.png"/>
</asp:dropdownlist>
<BR>
<asp:linkbutton 
    id="lnkbutOK"
    text="View Image"
    onclick="SubmitBtn_Click" 
    runat="server"
/>
<BR><BR>
<asp:image 
    id="imgToView" 
    runat="server"
/>
</Form>
</BODY>
</HTML>



Changing the ImageUrl property dynamically (C#)

<%@ Page Language="C#" %>
<script runat="server">
    protected void Button1_Click(object sender, EventArgs e)
    {
       Image1.ImageUrl = "~/MyImage2.gif";
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Image control</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Image ID="Image1" Runat="server" ImageUrl="~/MyImage1.gif" /><br />
        <br />
        <asp:Button ID="Button1" Runat="server" Text="Change Image" 
         OnClick="Button1_Click" />
    </div>
    </form>
</body>
</html>



Changing the ImageUrl property dynamically (VB)

<%@ Page Language="VB" %>
<script runat="server">
   Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
        Image1.ImageUrl = "~/MyImage2.gif"
   End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Image control</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Image ID="Image1" Runat="server" ImageUrl="~/MyImage1.gif" /><br />
        <br />
        <asp:Button ID="Button1" Runat="server" Text="Change Image" 
         OnClick="Button1_Click" />
    </div>
    </form>
</body>
</html>
Источник — «http://nfex.ru/index.php?title=ASP.Net/Asp_Control/Image&oldid=2113»