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<%@ Page Title="Load Image Files through File Path : Aspose.Imaging" Language="C#"
    MasterPageFile="~/tpl/Demo.Master" AutoEventWireup="true" CodeBehind="Open-files-through-FilePath.aspx.cs"
    Inherits="Aspose.Imaging.Demos.Open_files_through_FilePath" %>

<asp:Content ID="Content" ContentPlaceHolderID="MainContent" runat="server">
    <table class="componentDescriptionTxt" border="0" cellpadding="0" cellspacing="0"
        style="text-align: center; width: 100%; font-family: Arial; font-size: small;">
        <tbody>
            <tr>
                <td style="width: 19; vertical-align: top;">
                </td>
                <td class="productTitle" style="width: 100%;">
                    <h2>
                        Open Image files through Stream - Aspose.Imaging Demos
                    </h2>
                </td>
                <td style="width: 19; vertical-align: top;">
                </td>
            </tr>
        </tbody>
    </table>
    <div style="text-align: left; font-family: Arial; font-size: small;" class="componentDescriptionTxt">
        <p>
            This online demo demonstrates the ability of <a href="http://www.aspose.com/community/files/51/.net-components/aspose.imaging-for-.net/category1407.aspx">
                Aspose.Imaging</a> for .NET to open existing Image files.
        </p>
        <p>
            <b>Note: </b>At the moment, <strong>Aspose.Imaging for .Net</strong> API supports
            only Bmp, Jpeg, Gif, Tiff and Png format images while opening. 
            <br />
            <br />
            Using the FileUpload control, upload a <strong>Bmp</strong> format file. Click <b>Process</b>
            button after selecting any value from the dropdown to rotate the image accordingly.
        </p>
        <p>
            <asp:FileUpload ID="FileUpload1" runat="server" Height="23px" Width="195px" />
            <asp:Button ID="btnUpload" runat="server" OnClick="btnUpload_Click" Text="Upload File"
                Width="100px" />
            <br />
            <asp:Label ID="lblError" runat="server"></asp:Label>
            <br />
            <asp:DropDownList ID="ddlRotate" runat="server" Width="195px">
            </asp:DropDownList>
            <asp:Button ID="btnExecute" runat="server" Text="Process" OnClick="btnExecute_Click"
                Width="100px" />
        </p>
    </div>
</asp:Content>

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using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace Aspose.Imaging.Demos
{
    public partial class Open_files_through_FilePath : System.Web.UI.Page
    {
        private static string filepath = string.Empty;

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                //Loading dropdownlist with values of RotateFlipType Enum
                ddlRotate.DataSource = Enum.GetValues(typeof(Aspose.Imaging.RotateFlipType));
                ddlRotate.DataBind();
            }
        }

        protected void btnExecute_Click(object sender, EventArgs e)
        {
            //Creating an instance of image class and initializing it with the uploaded file through File path
            using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(filepath))
            {
                //Rotating the image according to the value selected from dropdownlist
                image.RotateFlip((RotateFlipType)Enum.Parse(typeof(RotateFlipType), this.ddlRotate.SelectedValue, true));
            }

            //Creating an instance of FileInfo and reading the File Path
            System.IO.FileInfo file = new System.IO.FileInfo(filepath);

            //Checking if File exists
            if (file.Exists)
            {
                //Creating the Response Header
                Response.Clear();
                Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
                Response.AddHeader("Content-Length", file.Length.ToString());
                Response.ContentType = "application/octet-stream";
                Response.WriteFile(file.FullName);
                Response.End();
            }
        }

        protected void btnUpload_Click(object sender, EventArgs e)
        {
            if (FileUpload1.HasFile)
                try
                {
                    //Check if uploaded file is of supported format
                   if (System.IO.Path.GetExtension(FileUpload1.FileName).Equals(".bmp", StringComparison.CurrentCultureIgnoreCase))
                   {
                       if (FileUpload1.PostedFile.ContentLength < (1024 * 1024) && FileUpload1.PostedFile.ContentLength > 0)
                       {
                           filepath = Server.MapPath(this.FileUpload1.FileName);
                           //Upload image to Server and display file information on Page
                           this.FileUpload1.PostedFile.SaveAs(MapPath(this.FileUpload1.FileName));
                           lblError.Text = "File name: " + FileUpload1.PostedFile.FileName + "<br/>" +
                           FileUpload1.PostedFile.ContentLength + " kb<br/>" + "Content type: " + FileUpload1.PostedFile.ContentType;
                           lblError.ForeColor = System.Drawing.Color.Black;
                       }
                       else
                       {
                           lblError.Text = "File size must be between 0 and 1MB";
                           lblError.ForeColor = System.Drawing.Color.Red;
                       }
                    }
                    else
                    {
                        lblError.Text = "Only bmp files are permitted at the moment";
                        lblError.ForeColor = System.Drawing.Color.Red;
                    }
                }
                catch (Exception ex)
                {
                    lblError.Text = "ERROR: " + ex.Message.ToString();
                    lblError.ForeColor = System.Drawing.Color.Red;
                }
            else
            {
                lblError.Text = "You have not specified a file.";
                lblError.ForeColor = System.Drawing.Color.Red;
            }
        }
    }
}