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Comment télécharger seulement des fichiers image RRS feed

  • Discussion générale

  • Fileupload.aspx:

     

    <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Fileupload.aspx.cs" Inherits="FileuploadDemo" %>
    <!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>Upload Image Demo</title>
    </head>
    <body>
        <form id="form1" runat="server">
        <div>
            <asp:Image ID="Image1" runat="server" />
            <asp:FileUpload ID="FileUpload1" runat="server" />
            <asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click" />
        </div>
        </form>
    </body>
    </html>

     

     

    Fileupload.aspx.cs:

     

    using System;
    using System.Collections;
    using System.Configuration;
    using System.Data;
    using System.Linq;
    using System.Web;
    using System.Web.Security;
    using System.Web.UI;
    using System.Web.UI.HtmlControls;
    using System.Web.UI.WebControls;
    using System.Web.UI.WebControls.WebParts;
    using System.Xml.Linq;
     
    public partial class FileuploadDemo : System.Web.UI.Page
    {
        protected void btnSubmit_Click(object sender, EventArgs e)
        {
            string fileFullname = this.FileUpload1.PostedFile.FileName;
            string dataName = DateTime.Now.ToString("yyyy-MM-dd hh-mm-ss");
            string fileName = fileFullname.Substring(fileFullname.LastIndexOf("\\") + 1);
            string type = fileFullname.Substring(fileFullname.LastIndexOf(".") + 1);
            if (FileUpload1.PostedFile.ContentType.ToUpper().IndexOf("IMAGE") > -1)
            {
                System.Drawing.Image img = System.Drawing.Image.FromStream(FileUpload1.PostedFile.InputStream);
                int Width = img.Width;
                int Height = img.Height;
     
                if (Width > 1000 || Height > 1000 || FileUpload1.PostedFile.ContentLength > 1024 * 1024 * 200)
                {
                    this.ClientScript.RegisterStartupScript(this.GetType(), "Startup",                       "<script language='javascript'>alert('The image size is too large!');</script>");
                }
                else
                {
                    if (type == "jpg" || type == "gif" || type == "bmp" || type == "JPG" || type == "GIF")
                    {
                        string ImagePath = "images/";
                        string sPath = Server.MapPath(ImagePath) + dataName + fileName;
                        string imgPath = ImagePath + dataName + fileName;
                        this.FileUpload1.PostedFile.SaveAs(sPath);
                        this.ClientScript.RegisterStartupScript(this.GetType(),                           "Startup", "<script language='javascript'>alert('Success!');</script>");
                        this.Image1.ImageUrl = imgPath;
                        this.btnSubmit.Enabled = false;
                        this.btnSubmit.Text = "Success!";
                        this.btnSubmit.Enabled = true;
     
                    }
                    else
                    {
                        this.ClientScript.RegisterStartupScript(this.GetType(), "Startup",                           "<script language='javascript'>alert('File type is not right!');</script>");
                    }
                }
            }
            else
            {
                this.ClientScript.RegisterStartupScript(this.GetType(), "Startup",                    "<script language='javascript'>alert('The uploaded file is not a image file!');</script>");
            }
        }
    }

     

     

    Pour plusieurs informations sur ASP.NET, consultez  Foire aux Questions - ASP.NET

     

     

     


    Alex Petrescu - MSFT
    mardi 30 mars 2010 11:04
    Modérateur