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<< Click to Display Table of Contents >> Criando thumbnails de imagens |
  
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<< Click to Display Table of Contents >> Criando thumbnails de imagens |
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Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" 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></title>
</head>
<body>
<form id="form1" runat="server">
<asp:FileUpload ID="FileUpload1" runat="server" BorderStyle="None" Width="360px" />
<br />
<asp:LinkButton ID="LinkButton1" runat="server" onclick="LinkButton1_Click">Enviar</asp:LinkButton>
<br />
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> </form>
</body>
</html>
Default.aspx.cs
using System;
using System.Drawing;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void LinkButton1_Click(object sender, EventArgs e)
{
string arquivo = Server.MapPath(FileUpload1.FileName);
FileUpload1.SaveAs(arquivo);
//Abre foto
Image abre_imagem = Image.FromFile(arquivo);
// calcula largura em proporção (50%)
int largura = abre_imagem.Width * 50 / abre_imagem.Height;
// 50 = pixels
Image.GetThumbnailImageAbort dummyCallBack = new Image.GetThumbnailImageAbort(ThumbnailCallback);
Image thumbNailImg = abre_imagem.GetThumbnailImage(largura, 50, dummyCallBack, IntPtr.Zero);
// dados dentro dos parenteses: largura, altura...
thumbNailImg.Save(Server.MapPath("thumbnail.jpg")); //salva thumbnail
Label1.Text = Server.MapPath("thumbnail.jpg");
//fechando conexoes
thumbNailImg.Dispose();
abre_imagem.Dispose();
}
public bool ThumbnailCallback()
{
return false;
}
}