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[CLOSED] Download button

  1. #1
    Sep 24, 2010, 8:46 AM

    [CLOSED] Download button

    Hi there,

    I don't mean to ressurect any old threads but basically we're having the same problem as Timothy had almost a year ago. Which was supposed to be fixed but for some reason it's not working for us. We're using Ext.NET 1.0.3901.23520 (revision 3042)

    http://forums.ext.net/showthread.php...D-Button-Click


    What it boils down to is, in Internet Explorer, sites in every zone except Local Intranet display a 'download warning' when it thinks something fishy is going on. Clicking on a <button> element does not constitute as fishy, but a postback trigged through an JS event listener on some divs (like Coolite is doing) does. So basically we would like to know if it's possible to have Ext.Net use <button> html elements for Buttons, or some way to use a 'classic' ASP.Net button inside an Ext.Net layout.

    We can whip up test cases if need be. Thanks very much
    Last edited by Daniil; Sep 24, 2010 at 11:49 AM. Reason: [CLOSED]
  2. #2
    Sep 24, 2010, 11:33 AM
    Hi,

    Fixed. Please update from SVN (don't forget to set AutoPostBack="true" for the button)
  3. #3
    Oct 05, 2010, 11:05 AM

    Doesn't work for me

    Sorry to be replying so late but it doesn't seem to be solved at all here.

    I just updated from SVN, using version 1.0.3930.20134 (rev 3141). I can provide a test case:

    
<%@ Page Language="C#" AutoEventWireup="true" %>

<!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">
		<script type="text/C#" runat="server">

			protected void OnClick(object sender, EventArgs e)
			{
				var bytes = new UTF8Encoding().GetBytes("Hello World");
				WriteBytes(bytes, "text/plain", "somefile.txt");
			}
				
			/// <summary> Write the specified bytearray to the user as a file </summary>
			/// <param name="data">Bytedata to write</param>
			/// <param name="mimeType">Mimetype of the file</param>
			/// <param name="fileName">(display)name of the file</param>
			private static void WriteBytes(byte[] data, string mimeType, string fileName)
			{
				HttpResponse response = HttpContext.Current.Response;

				response.Clear();
				response.AddHeader("Content-Disposition", String.Format("attachment; filename={0}", fileName));
				response.AddHeader("Content-Length", data.Length.ToString());
				response.ContentType = mimeType;
				response.BinaryWrite(data);
				response.End();
			}
		</script>
		<ext:ResourceManager runat="server" />
		<ext:Button Text="Download!" runat="server" OnClick="OnClick" AutoPostBack="true" />
	</form>
</body>
</html>
    Running IE7 (and I believe 8 too) in Internet zone will yield the error. To trick my browser into thinking I wasn't using my local IIS I had to adjust my hosts file.
    Attached Files
  4. #4
    Oct 05, 2010, 4:45 PM
    Hi,

    Yes, our fix doesn't work with your sample. As you understood it is IE security warning and it is dificult to prevent it.
    I can suggest to use the following workaround
    <%@ Page Language="C#" AutoEventWireup="true" %>
<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>
 
<!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>
    
    <script runat="server">
 
            protected void OnClick(object sender, EventArgs e)
            {
                var bytes = new UTF8Encoding().GetBytes("Hello World");
                WriteBytes(bytes, "text/plain", "somefile.txt");
            }
                 
            private static void WriteBytes(byte[] data, string mimeType, string fileName)
            {
                HttpResponse response = HttpContext.Current.Response;
 
                response.Clear();
                response.AddHeader("Content-Disposition", String.Format("attachment; filename={0}", fileName));
                response.AddHeader("Content-Length", data.Length.ToString());
                response.ContentType = mimeType;
                response.BinaryWrite(data);
                response.End();
            }
        </script>
</head>
<body>
    <form id="form1" runat="server">        
        <ext:ResourceManager runat="server" />
        <ext:Button Text="Download!" runat="server" AutoPostBack="true" OnClick="OnClick">
            <Listeners>
                <Click Handler="if(Ext.isIE){Ext.getDom('Button1').click(); return false;}" />
            </Listeners>
        </ext:Button>
        <asp:Button ID="Button1" runat="server" OnClick="OnClick" style="display:none;"/>
    </form>
</body>
</html>
  5. #5
    Oct 06, 2010, 1:50 PM
    Unbelievable. Some security that is.
    Thanks guys, you helped me out a lot.

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