如何将图像数据类型的数据库中的图像检索到c＃中的PhotoBox

Question

下面的代码是我的照片选择选择器（我项目中的另一个按钮就是将picArray发送到图片datatype列中的表格中）：

private void FileSelectorButton_Click(object sender, EventArgs e)
    {

        OpenFileDialog ImageSelectorWindow = new OpenFileDialog();
        ImageSelectorWindow.Filter = "JPG |*.jpg|PNG |*.png|Bitmap |*.bmp";
        ImageSelectorWindow.Title = "Choose an Image";
        if (ImageSelectorWindow.ShowDialog() == System.Windows.Forms.DialogResult.OK)
        {
            fileName = ImageSelectorWindow.FileName;


            FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);

            picArray = new byte[fs.Length];

            fs.Read(picArray, 0, Convert.ToInt32(fs.Length));
            fs.Close();
        }

        TBFilePath.Text = fileName;

    }

以下是我的图片检索代码：

SqlCommand cmd2 = new SqlCommand("SELECT avatar FROM Members WHERE Id = '" + value + "'", con);

SqlDataReader dr = cmd2.ExecuteReader();

MemoryStream ms = new MemoryStream((byte[])dr[0]);

PBMemberImage.BackgroundImage = new Bitmap(ms);

这给了我以下例外：

有人可以帮我找出原因吗？

Answer 1

Retrieve Images from sql server database

看看它并尝试下面的代码来检索您的图像。如果有效，请告诉我。

byte[] img = (byte[])cmd2.ExecuteScalar();
MemoryStream ms = new MemoryStream();
ms.Write(img, 0, img.Length);
PBMemberImage.BackgroundImage = new Bitmap(ms);