Question

Markup:

<asp:ListView ID="lvGallery" runat="server" DataSourceID="SqlDataSource1">
    <LayoutTemplate>
        <table runat="server" id="tableGallery">
            <tr runat="server" id="itemPlaceHolder"></tr>       
        </table>       
    </LayoutTemplate>
    <ItemTemplate>       
    <tr>
        <td>
            <div class="box_img2">
                <div class="g_size">
                    <a runat="server" id="linkImage">
                        <img id="Image1" runat="server" src="MyImage.jpg" />
                    </a>
                </div>         
            </div>
        </td>
    </tr>
   </ItemTemplate>
</asp:ListView>    
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="..."  ProviderName="System.Data.SqlClient"  SelectCommand="SELECT [Image] FROM [GalleryImages]"></asp:SqlDataSource>

Code-behind:

public void ProcessRequest(HttpContext context)
{
    //write your handler implementation here.
    string username = Convert.ToString(context.Request.QueryString["username"]);
    if (username != null)
    {
        DataSet ds = new DataSet();
        SqlDataAdapter da = new SqlDataAdapter();
        byte[] arrContent;
        DataRow dr;
        string strSql;
        strSql = "Select Image from GalleryImages where username = '" + username + "'";
        da = new SqlDataAdapter(strSql, connection.ConnectionString);
        da.Fill(ds);
        dr = ds.Tables[0].Rows[0];
        arrContent = (byte[])dr["ImageFile"];
        context.Response.ContentType = "jpeg";
        context.Response.OutputStream.Write(arrContent, 0, arrContent.Length);
        context.Response.End();
    }
}

I have also added httphandlers section in web.config. But I don’t get the images in ListView control.

Answer 1

Cool question. I would write a class implementing IHttpHandler which responds to requests for the image file(s).

See my answer in the following question for an example of how to get file streams in and out of a SQL varbinary(max) field.

How to make a fileupload interface in ASP.NET

Don’t forget to use the correct MIME type when crafting the HTTP response.