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;
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);
}
you need to made an ASP.NET handler (*.ASHX) that serves the bytes of the image
<img src="ImageHandler.ashx?id=<%=id%>" />
In image handler you need to code like this
public class ImageHandler : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
// Load the image (see previous code sample)
byte[] data = Convert.FromBase64String(encodedString);
// Display the image
context.Response.OutputStream.Write(data, 0, data.Length);
context.Response.ContentType = "image/JPEG";
}
}
please refer this for more info Image from Database
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Connect();
}
try
{
cm = new SqlCommand("select profile_pic from TblNewMemberRegistration where user_name='sudhanshu@mailbox.com'", cn);
byte[] b = (byte[])cm.ExecuteScalar();
stream.Write(b, 0, b.Length);
Bitmap bm = new Bitmap(stream);
Response.ContentType = "image/gif";
bm.Save(Response.OutputStream, ImageFormat.Gif);
}
catch(Exception ex)
{
Response.Write(ex.Message);
}
finally
{
cn.Close();
stream.Close();
}
}
protected void Connect()
{
cn = new SqlConnection(ConfigurationManager.ConnectionStrings["connect"].ConnectionString);
cn.Open();
}
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