Convert from binary data to an image control in ASP.NET

I have binary data of an image in my database, and I want to display it in an image control in ASP.NET. How? If it is impossible, please find another way to save it in the database and display it in an image control.

Solution 1:

Create a regular HTML img element like so:

<img runat="server" id="image" />

And in code behind do this:

image.src = "data:image/png;base64," + Convert.ToBase64String(imageBytes);

Where imageBytes is a byte[].

You are done. The image will be displayed.

Solution 2:

Most likely the image is being stored as a byte array in the database. If so, then you can use this:

public static System.Drawing.Image ByteArrayToImage(byte[] bArray)
{
    if (bArray == null)
        return null;

    System.Drawing.Image newImage;

    try
    {
        using (MemoryStream ms = new MemoryStream(bArray, 0, bArray.Length))
        {
            ms.Write(bArray, 0, bArray.Length);
            newImage = System.Drawing.Image.FromStream(ms, true);
        }
    }
    catch (Exception ex)
    {
        newImage = null;

        //Log an error here
    }

    return newImage;
}

Solution 3:

In a generic handler (.ashx):

  public class ImageHandler : IHttpHandler
        {

            public void ProcessRequest(HttpContext context)
            {

                    if(!string.IsNullOrEmpty(context.Request.QueryString["ImageId"])){
                    try
                    {
                        string ImageId = context.Request.QueryString["ImageId"].ToString(); 
                        ImageDataModel idm = new ImageDataModel();
                        byte[] ImageData = idm.getImageData(ImageId);

                        context.Response.ContentType = "image/JPEG";
                        context.Response.OutputStream.Write(ImageData, 0, ImageData.Length); 


                    }

Solution 4:

public Byte[] Ret_image(Int32 id)
{
    SqlCommand cmd = new SqlCommand();
    cmd.CommandText = "select * from tbimage where imageid=@id";
    cmd.Connection = con;
    cmd.Parameters.Add("@id", SqlDbType.Int).Value = id;
    SqlDataReader dr = cmd.ExecuteReader();
    dr.Read();
    Byte[] ar = (Byte[])(dr[1]);
    dr.Close();
    cmd.Dispose();
    return ar;
}