Uploadfileファイルアップロードコントロールの使用方法

まずPage_Loadメソッドクリックイベントの追加

protected void Page_Load(object sender, EventArgs e)
        {
             btnUploadFile2.ServerClick += new EventHandler(btnUploadFile2_ServerClick);
	}

メソッド実装イベントでよく使用されるいくつかの書き方を追加する

        void btnUploadFile2_ServerClick(object sender, EventArgs e)
        {
            try
            {
                if (TxtMedCode2.Text.Length == 0)
                {
                    Page.RegisterStartupScript("msg", "alert('               !')");
                    return;
                }


                //1.    
                bool fileOK = false;
                string path = Server.MapPath("~/upload/");
                if (this.FileUpload2.HasFile)
                {
                    string fileException = System.IO.Path.GetExtension(FileUpload2.FileName).ToLower();
                    string[] allowedException = { ".jpg", ".gif", ".bmp", ".ico", ".png" };
                    for (int i = 0; i < allowedException.Length; i++)
                    {
                        if (fileException == allowedException[i])
                            fileOK = true;
                    }
                }
                if (fileOK)
                {
                    try
                    {
                        DateTime dt1 = DateTime.Now;

                        //       upload  
                        string strFileName = this.TxtMedCode2.Text.ToString() + dt1.ToString("yyyyMMddHHmmss");
                        this.FileUpload2.SaveAs(path + strFileName + "_Init" + ".jpg");
                        //         ,   image     
                        System.Drawing.Image img_Big = this.PhotoSizeChange(path + strFileName + "_Init" + ".jpg", 300, 165);
                        //       upload  
                        img_Big.Save(path + strFileName + "_Commendation" + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
                        //                      
                        LblImgUrl2.Text = "upload/" + strFileName + "_Commendation" + ".jpg";
                        //

                        if (Mn_PostId(TxtMedCode2.Text) == "0")
                        {
                            //LblDeatil1.Text = "     ,            !";
                        }
                        else
                        {
                            LblPostUrl2.Text = Mn_PostId(TxtMedCode2.Text);
                        }
                        //Img1.ImageUrl = LblImgUrl1.Text.ToString();
                        //       
                        img_Big.Dispose();
                        //this.LblDeatil1.Text = "      !";
                    }
                    catch (Exception ex)
                    {
                        Response.Redirect("~/Error.aspx?error=" + ex.Message.Replace("
", "").Replace("
", ""));
                        Page.RegisterStartupScript("msg", "alert('      ，   !')");
                    }
                }
                else
                {
                    Page.RegisterStartupScript("msg", "alert('     !')");
                }
            }
            catch (Exception e2)
            {
                Response.Redirect("~/Error.aspx?error=" + e2.Message.Replace("
", "").Replace("
", ""));
            }

        }

画像の長さと幅を変える方法は以下の通りです.

private System.Drawing.Image PhotoSizeChange(string strPhoto, int iWidth, int iHeight)
        {
            //*****strPhoto               ******// 
            //       
            System.Drawing.Image image = new Bitmap(strPhoto);//     
            //         
            System.Drawing.Image newImage = image.GetThumbnailImage(iWidth, iHeight, null, new IntPtr());
            Graphics g = Graphics.FromImage(newImage);
            //           
            g.DrawImage(newImage, iHeight, iHeight, newImage.Width, newImage.Height);
            g.Dispose();
            return newImage;
        }

後で勉強して見るためだけに使う.