将图片上传到PictureBox控件中

最新推荐文章于 2023-04-28 14:08:46 发布

转载最新推荐文章于 2023-04-28 14:08:46 发布 · 326 阅读

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原文链接：https://my.oschina.net/dongri/blog/610920

文章标签：

#c#

本文详细介绍了如何使用C#在PictureBox控件中上传并显示图片，包括选择图片、获取图片信息、调整图片尺寸以适应控件大小以及检查图片是否超出预设的最大文件限制。

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/// <summary>
        /// 将图片上传到PictureBox控件中
        /// </summary>
        /// <param name="picBox">PictureBox</param>
        /// <param name="picInfo">返回的图片信息</param>
        public void SetPictureToCtrl(PictureBox picBox, out string picInfo)
        {
            OpenFileDialog ofdPic = new OpenFileDialog();
            ofdPic.Filter = "JPG(*.JPG;*.JPEG);|*.jpg;*.jpeg;";
            ofdPic.FilterIndex = 1;
            ofdPic.RestoreDirectory = true;
            ofdPic.FileName = "";
            if (ofdPic.ShowDialog() == DialogResult.OK)
            {
                string sPicPaht = ofdPic.FileName.ToString();
                FileInfo fiPicInfo = new FileInfo(sPicPaht);
                long lPicLong = fiPicInfo.Length / 1024;
                string sPicName = fiPicInfo.Name;
                string sPicDirectory = fiPicInfo.Directory.ToString();
                string sPicDirectoryPath = fiPicInfo.DirectoryName;
                Bitmap bmPic = new Bitmap(sPicPaht);

                if (BaseOption.Initialize.UserPhotoMaxSize > 0 && lPicLong / 1024 > BaseOption.Initialize.UserPhotoMaxSize)
                {
                    MessageBox.Show("此文件大小为" + lPicLong / 1024 + "M；已超过最大限制的" + BaseOption.Initialize.UserPhotoMaxSize + "M范围！");
                }
                else
                {
                    Point ptLoction = new Point(bmPic.Size);
                    if (ptLoction.X > picBox.Size.Width || ptLoction.Y > picBox.Size.Height)
                    {
                        picBox.SizeMode = PictureBoxSizeMode.Zoom;
                    }
                    else
                    {
                        picBox.SizeMode = PictureBoxSizeMode.CenterImage;
                    }
                }
                picBox.LoadAsync(sPicPaht);

                picInfo = "图片名称：" + sPicName + "\r\n图片大小：" + lPicLong.ToString() + " KB" + "\r\n图片像素：" + bmPic.Size.Width.ToString() + "×" + bmPic.Size.Height.ToString();
            }
            picInfo = "";
        }

转载于:https://my.oschina.net/dongri/blog/610920