Load Image to asp:Image : Image « ASP.net Controls « ASP.NET Tutorial
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<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<div>
<asp:Label ID="Label1" runat="server" Height="32px" Text="Image to display" Width="176px"></asp:Label>
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" Width="112px">
<asp:ListItem>A</asp:ListItem>
<asp:ListItem>B</asp:ListItem>
</asp:DropDownList>
<div>
<asp:Button ID="Button1" runat="server" Text="Select Image" /></div>
</div>
<div>
<asp:Image ID="Image1"
runat="server"
AlternateText="Image"
Height="128px"
ToolTip="Image"
Width="208px" /></div>
</div>
</form>
</body>
</html>
File: Default.aspx.vb
Partial Class _Default
Inherits System.Web.UI.Page
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Select Case DropDownList1.SelectedIndex
Case 0
Image1.ImageUrl = "http://www.java2s.com/style/logo.png"
Case 1
Image1.ImageUrl = "http://www.java2s.com/style/logo.png"
End Select
End Sub
End Class