擴展PictureBox的一個組件(2)

最新推荐文章于 2025-05-09 15:21:06 发布

weixin_33912445

最新推荐文章于 2025-05-09 15:21:06 发布

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我的另一篇隨筆擴展PictureBox的一個組件,最進還因為一些另外的原因﹐對這個picturebox又進行一些新的功能添加﹐如果你下載了上一篇隨筆的源組件﹐那么你可以很輕易利用下面的這個類來調用。不多說多余的話﹐貼出源出來(真的很奇怪﹐我又不能上傳源文件)

namespace AuthenticationTestClient
{
     using System;
     using System.Drawing;
     using System.Windows.Forms;
     using System.IO;
     /// <summary>
     /// PictureControl 的摘要描述。
     /// </summary>
     public class PictureControl
    {
         public PictureControl(){}

        [FlagsAttribute]
             public enum ImgStyle {JPG, BMP, GIF};

         private byte [] _ImgArray = new byte [ 1 ];
         private Image _Image;
         public byte [] ImgArray
        {
             get
            {
                 if (_ImgArray == null ){     return null ;}
                 return _ImgArray;
            }
        }

         public Image Image
        {
             get
            {
                 if (_Image == null )     return null ;
                 return _Image;
            }
        }

         /// <summary>
         /// 裝載圖片
         /// </summary>
         /// <param name="FilterStyle"></param>
         /// <returns></returns>
         public static PictureControl LoadImage (ImgStyle FilterStyle)
        {
            PictureControl PC = new PictureControl ();
            OpenFileDialog     FileDialog = new OpenFileDialog ();
            FileDialog.Filter = PC.CombinFilter (FilterStyle);

             if (FileDialog.ShowDialog() == DialogResult.OK)
            {

                PC._Image = Image.FromFile (FileDialog.FileName);
                FileStream fStream = new FileStream (FileDialog.FileName,
                    FileMode .Open, FileAccess.Read, FileShare.Read);
                PC._ImgArray = new byte [fStream.Length];
                fStream.Read (PC._ImgArray, 0 , ( int )fStream.Length);
                fStream.Flush ();
                fStream.Close ();


            }
             else
            {
                 return null ;
            }
            FileDialog.Dispose ();
             return PC;
        }

         public static PictureControl ShowImage ( byte [] ImgArray)
        {
            MemoryStream mStream = new MemoryStream ();
            mStream.Write (ImgArray, 0 , ImgArray.Length );
            PictureControl PC = new PictureControl ();
            PC._Image = Image.FromStream (mStream);
             return PC ;
        }

         /// <summary>
         /// 合并enum
         /// </summary>
         /// <param name="FilterStyle"></param>
         /// <returns></returns>
         private    string CombinFilter (ImgStyle FilterStyle)
        {
             string FilterString = "" ;
            ImgStyle[] StyleArray = (ImgStyle[])Enum.GetValues (FilterStyle.GetType());
             for ( int i = 0 ; i < StyleArray.Length; i ++ )
            {
                 if (FilterString == "" )
                    FilterString = FilterStr(StyleArray[i]);
                 else
                {
                    FilterString = FilterString + ' | ' + FilterStr (StyleArray[i]);
                }
            }
             return FilterString;
        }

         /// <summary>
         /// 取得實際的篩選值
         /// </summary>
         /// <param name="FilterStyle"></param>
         /// <returns></returns>
         private string FilterStr (ImgStyle FilterStyle)
        {
             string FilterString = "" ;
             switch (FilterStyle)
            {
                 case ImgStyle.BMP:
                    FilterString = " BMP (*.bmp)|*.bmp " ;
                     break ;
                 case ImgStyle.JPG:
                    FilterString = " JPG (*.jpg)|*.jpg " ;
                     break ;
                 case ImgStyle.GIF:
                    FilterString = " GIF (*.gif)|*.gif " ;
                     break ;
                 default :
                     break ;
            }
             return FilterString ;
        }

    }
}

源碼都有詳細注釋﹐很容易的。調用方法如下﹕

this .pictureBox1.Image = PictureControl.ShowImage((PictureControl.LoadImage(PictureControl.ImgStyle.JPG)).ImgArray).Image;
// this.pictureBox1.Image = PictureControl.LoadImage(PictureControl.ImgStyle.JPG).Image;