What is the syntax for ImageURL from another in-house server? 1

AndyInNC · Apr 5, 2014

This does not seem like it should be that hard, but for some reason I'm stuck.

We have a file server that houses images from several applications and our web server needs to display them. When I add this code, I get a broken image icon.

HTML:

<asp:Image ID="imgPhoto" runat="server" Width="140px"
    ImageUrl="\\SERVERNAME\FolderName\44959\Graphic.jpg" />

Nothing is being uploaded, so no virtual path is necessary.

The code is on the development PC which is in the same domain as the web server. Am I missing something obvious?

Thanks!

jbenson001 · Apr 6, 2014

We do the same thing. But what you have to do is a set up a web that can serve up the images to your website. So you would have to access an image on the server something like:

http://youserver/foldername/imagename.ext

AndyInNC · Apr 11, 2014

Thanks jbenson001. What you said makes perfect sense, but I couldn't make it happen. It turns out what I thought was just a file server for the images does more than that so they won't let me touch IIS there.

Here's the approach I took. Hopefully someone can use it.

As you said, it has to be a URL, so I made it one by creating ImageViewer.aspx which only has a DIV.

HTML:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "[URL unfurl="true"]http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">[/URL]

<html xmlns="[URL unfurl="true"]http://www.w3.org/1999/xhtml">[/URL]
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    </div>
    </form>
</body>
</html>

Then I added this to the code behind:

Code:

protected void Page_Load(object sender, System.EventArgs e)
{
    if (Request.QueryString("sFileName") + "" > "") {
        try {
            [COLOR=#4E9A06]// Read the file and convert it to Byte Array[/color]
            string sFileName = Request.QueryString("sFileName");
            string sDirectory = Request.QueryString("sDirectory");

            [COLOR=#4E9A06]// SourcePath is from web.config in the format of \\ServerName\Folder1\Folder
            // In my code, sDirectory is dynamically built, but I've modified it here to act
            // like it's passed in in the QueryString.[/color]
            string sFilePath = Path.Combine(ConfigurationManager.AppSettings.Item("SourcePath"), sDirectory);

            [COLOR=#4E9A06]// Used for generating the image in the viewer.[/color]
            string sContentType = "image/" + Path.GetExtension(sFileName).Replace(".", "");

            FileStream fs = new FileStream(sFilePath + sFileName, FileMode.Open, FileAccess.Read);
            BinaryReader br = new BinaryReader(fs);
            byte[] bytes = br.ReadBytes(Convert.ToInt32(fs.Length));

            br.Close();
            fs.Close();

            [COLOR=#4E9A06]//Write the file to Reponse[/color]
            Response.Buffer = true;
            Response.Charset = "";
            Response.Cache.SetCacheability(HttpCacheability.NoCache);
            Response.ContentType = sContentType;
            Response.AddHeader("content-disposition", "attachment;filename=" + sFileName);
            Response.BinaryWrite(bytes);
            Response.Flush();
            Response.End();
        } catch (Exception ex) {
            throw ex;
        }
    }
}

Now I am able to use the following as the image tag:

HTML:

                    <asp:Image runat='server' ID='imgFile' ImageUrl="./ImageViewer.aspx?sFileName=317179.jpg&sDirectory=ImageFolder\"
                        AlternateText='' Width='115px' ToolTip="317179.jpg" />

jbenson001 · Apr 12, 2014

Good idea. You can take this one step further by using a handler (.ashx). It is a page without the UI. So you have all the same coding abilities without the extra overhead of a UI, which, in your case, you don't need. Take a look into it. It's a good thing to know, and we use it often, especially in the case of getting images from our image server.

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What is the syntax for ImageURL from another in-house server? 1

AndyInNC

Programmer

jbenson001

Programmer

AndyInNC

Programmer

jbenson001

Programmer

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