How to retrieve binary image from database using C# in ASP.NET

I need to retrieve a binary image from the database.

My queries are as below.

SqlConnection con = new SqlConnection(@"Data Source=localhost;Initial Catalog=MyGames;Integrated Security=True");
SqlCommand cmd = new SqlCommand("Select blueBallImage from CorrespondingBall WHERE objective = Default Ball", con);

I do not know how to retrieve blueBallImage which is a binary image.

After I have retrieve it successfully, I need to add a text onto the image using a dropdownlist which contain the text. The codes are as below.

Bitmap bmp = new Bitmap(@"C:\Users\apr13mpsip\Documents\Visual Studio 2012\WebSites\CorrespondingBallWebSite\Images\blueBallDefault.png");

For the time being, I do not know how to retrieve the image. Therefore, I hard coded it which I do not want. I want to retrieve it from database.

Graphics gra = Graphics.FromImage(bmp);

gra.DrawString(ddlCharacter.Text, new Font("Verdana", 18), Brushes.Black, new PointF(4, 6));

MemoryStream ms1 = new MemoryStream();
bmp.Save(ms1, ImageFormat.Png);
var base64Data = Convert.ToBase64String(ms1.ToArray());
imgImage.ImageUrl = "data:image/png;base64," + base64Data;

Solution 1:

Here is a basic sample to load an image from database quickly and load into a html image source in ASP. Please tell me if it works for you ;-)

//Get byte array from image file in the database with basic query
SqlDataAdapter myAdapter1 = new SqlDataAdapter("Select [logo] FROM [dbo].[tblCompanyInfo]", GlobalUser.currentConnectionString);
DataTable dt = new DataTable();
myAdapter1.Fill(dt);

foreach (DataRow row in dt.Rows)
{
    // Get the byte array from image file
    byte[] imgBytes = (byte[]) row["logo"];

    // If you want convert to a bitmap file
    TypeConverter tc = TypeDescriptor.GetConverter(typeof(Bitmap));
    Bitmap MyBitmap = (Bitmap)tc.ConvertFrom(imgBytes);

    string imgString = Convert.ToBase64String(imgBytes);
    //Set the source with data:image/bmp
    imgLogoCompany.Src = String.Format("data:image/Bmp;base64,{0}\"", imgString);
}