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File: Control.ascx
<%@ Control Language="C#" ClassName="PropertyRandomImage" %>
<%@ Import Namespace="System.IO" %>
<script runat="server">
private string _imageFolderPath = "~/Images";
public string ImageFolderPath
{
get { return _imageFolderPath; }
set { _imageFolderPath = value; }
}
void Page_Load()
{
string imageToDisplay = GetRandomImage();
imgRandom.ImageUrl = Path.Combine(_imageFolderPath, imageToDisplay);
lblRandom.Text = imageToDisplay;
}
private string GetRandomImage()
{
Random rnd = new Random();
string[] images = Directory.GetFiles(MapPath("~/Images"), "*.jpg");
string imageToDisplay = images[rnd.Next(images.Length)];
return Path.GetFileName(imageToDisplay);
}
</script>
<asp:Image
id="imgRandom"
Width="300px"
Runat="server" />
<br />
<asp:Label
id="lblRandom"
Runat="server" />
File: Default.aspx
<%@ Page Language="C#" %>
<%@ Register TagPrefix="user" TagName="PropertyRandomImage" Src="~/Control.ascx" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
PropertyRandomImage1.ImageFolderPath = "~/Images2";
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Show Programmatic</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<user:PropertyRandomImage
ID="PropertyRandomImage1"
Runat="server" />
</div>
</form>
</body>
</html>
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