bookmanager.cs

asp.net 做的个人图书站点应用

    //                }
    //            }
    //            return book;
    //        }
    //    }
    //}
    //增加类别
    public static void AddBookClass(string name, string remark,byte [] orginal)
    {
        using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["BookShow"].ConnectionString))
        {
            using (SqlCommand command = new SqlCommand("AddCategory", connection))
            {
                command.CommandType = CommandType.StoredProcedure;
                command.Parameters.Add(new SqlParameter("@name", name));
                command.Parameters.Add(new SqlParameter("@remark", remark));
                command .Parameters .Add (new SqlParameter("@image",ResizeImageFile(orginal,100)));
                connection.Open();
                command.ExecuteNonQuery();
            }
        }
    }
    //增加图书
    public static void AddBook(string BookName,int CategoryID,byte[]orginal,string ISDN,string BookTips)
    {        
        MembershipUser user=Membership.GetUser ();
        
        using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["BookShow"].ConnectionString))
        {
            using (SqlCommand command = new SqlCommand("AddBook", connection))
            {
               command.CommandType = CommandType.StoredProcedure;
               command .Parameters .Add (new SqlParameter ("@BookName",BookName ));
               command.Parameters.Add(new SqlParameter("@CategoryID", CategoryID));
               command.Parameters.Add(new SqlParameter("@BookImageS", ResizeImageFile(orginal, 100)));
               command.Parameters.Add(new SqlParameter("@BookImageL", ResizeImageFile(orginal, 250)));
               command.Parameters.Add(new SqlParameter("@ISBN", ISDN ));
               command .Parameters .Add (new SqlParameter ("@UserID",user .UserName .ToString ()));
               command.Parameters.Add(new SqlParameter("@BookTips", BookTips));
               command.Parameters.Add(new SqlParameter("@AddDateTime", DateTime.Now));
               connection.Open();
               command.ExecuteNonQuery();
            }
        }
    }
    //修改图书
    public static void EditBook(int BookID,string BookName, int CategoryID, byte[] orginal, string ISDN, string BookTips)
    {
        
        using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["BookShow"].ConnectionString))
        {
            using (SqlCommand command = new SqlCommand("EditBook", connection))
            {
                command.CommandType = CommandType.StoredProcedure;
                command.Parameters.Add(new SqlParameter("@BookID", BookID));
                command.Parameters.Add(new SqlParameter("@BookName", BookName));
                command.Parameters.Add(new SqlParameter("@CategoryID", CategoryID));
                command.Parameters.Add(new SqlParameter("@BookImageS", ResizeImageFile(orginal, 100)));
                command.Parameters.Add(new SqlParameter("@BookImageL", ResizeImageFile(orginal, 250)));
                command.Parameters.Add(new SqlParameter("@ISBN", ISDN));
                command.Parameters.Add(new SqlParameter("@BookTips", BookTips));
              
                connection.Open();
                command.ExecuteNonQuery();
            }
        }
    }
    //移除类别
    public static void RemoveCategory(int CategoryID)
    {
        using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["BookShow"].ConnectionString))
        {
            using (SqlCommand command = new SqlCommand("RemoveCategory", connection))
            {　　
                command.CommandType = CommandType.StoredProcedure;
                command.Parameters.Add(new SqlParameter("@categoryID", CategoryID));
                connection.Open();
                command.ExecuteNonQuery();
            }
        }
    }
    //移除图书
    public static void RemoveBook(int BookID)
    {
        using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["BookShow"].ConnectionString))
        {
            using (SqlCommand command = new SqlCommand("RemoveBook", connection))
            {
                command.CommandType = CommandType.StoredProcedure;
                command.Parameters.Add(new SqlParameter("@BookID", BookID));
                connection.Open();
                command.ExecuteNonQuery();
            }
        }
    }
    //获得图书封面图像
    public static Stream GetBookImage(int bookid, ImageSize size)
    {
       using ( SqlConnection connection = new SqlConnection (ConfigurationManager .ConnectionStrings ["BookShow"].ConnectionString ))
       {
           using (SqlCommand command = new SqlCommand ("GetBookImage",connection ))
           {
               command.CommandType = CommandType.StoredProcedure;
               command.Parameters.Add(new SqlParameter("@BookID", bookid));
               command .Parameters .Add (new SqlParameter ("@size",(int)size));
               connection.Open();
               object result = command.ExecuteScalar();
               try
               {
                   return new MemoryStream((byte[])result);
               }
               catch 
               {
                   return null;
               }
           }
       }
        
    }
    //获得类别图片
    public static Stream GetClassImage(int categoryid, ImageSize size)
    {
       using (SqlConnection connection = new SqlConnection (ConfigurationManager.ConnectionStrings["BookShow"].ConnectionString ))
       {
           using(SqlCommand  command = new SqlCommand ("GetClassImage",connection ))
           {
               command .CommandType=CommandType.StoredProcedure;
               command .Parameters .Add (new SqlParameter ("@categoryid",categoryid ));
               connection .Open ();
               object result=command .ExecuteScalar();
               try
               {
                   return new MemoryStream ((byte[])result );
               }
               catch 
               {return null;}

           }
       }
    }
    //当无图像时，获得无图像封面
    public static Stream GetImage(ImageSize size)
    {
        string path =HttpContext.Current .Server.MapPath("~/Images/");
        switch (size)
        {
            case ImageSize .Small :
                path += "placeholder-100.jpg";
                break;
            case ImageSize .Large:
                path += "placeholder-600.jpg";
                break;
            default :
                path += "placeholder-600.jpg";
                break;
        }
       
        return new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
    }
    //计算维度，　当高比宽高时，按高为基础计算比例，当宽更大时，刚以宽为基础
    private static Size CalculateDimensions(Size oldSize, int targetSize)
    {
        Size newSize = new Size();
        if (oldSize.Height > oldSize.Width)
        {
            newSize.Width = (int)(oldSize.Width * ((float)targetSize / (float)oldSize.Height));
            newSize.Height = targetSize;
        }
        else
        {
            newSize.Width = targetSize;
            newSize.Height = (int)(oldSize.Height * ((float)targetSize / (float)oldSize.Width));
        }
        return newSize;
    }
    //比例缎缩放图像。
    private static byte[] ResizeImageFile(byte[] imageFile, int targetSize)
    {
        using (System.Drawing.Image oldImage = System.Drawing.Image.FromStream(new MemoryStream(imageFile)))
        {
            Size newSize = CalculateDimensions(oldImage.Size, targetSize);
            using (Bitmap newImage = new Bitmap(newSize.Width ,newSize.Height ,System .Drawing .Imaging.PixelFormat.Format24bppRgb))
            {
                using (Graphics canvas = Graphics.FromImage(newImage))
                {
                    canvas.SmoothingMode = SmoothingMode.AntiAlias;
                    canvas.InterpolationMode = InterpolationMode.HighQualityBicubic;
                    canvas.PixelOffsetMode = PixelOffsetMode.HighQuality;
                    canvas .DrawImage(oldImage ,new Rectangle(new Point (0,0),newSize ));
                    MemoryStream m = new MemoryStream ();
                    newImage.Save (m,System .Drawing .Imaging .ImageFormat.Jpeg );
                    return  m.GetBuffer ();
                }
            }
            }

    }
    //修改类别
    public static void EidtCategory(string CategoryName, string CategoryRemark, byte[] orginal, int CategoryID)
    {
        using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["BookShow"].ConnectionString))
        { 
            using (SqlCommand  command = new SqlCommand ("EidtCategory",connection ))
            {
                command.CommandType = CommandType.StoredProcedure;
                command.Parameters .Add (new SqlParameter("@CategoryID",CategoryID));
                command.Parameters.Add(new SqlParameter("@CategoryName", CategoryName));
                command.Parameters.Add(new SqlParameter("@CategoryRemark", CategoryRemark));
                command.Parameters.Add(new SqlParameter("@CategoryImage",ResizeImageFile (orginal ,100)));
                connection.Open();
                command.ExecuteNonQuery();
            }
        }
            
    }
}