WebControl.Image to Itextsharp.Image

I already solved my problem by myself. The problem was that the format of uri was not correct, so, as iTextSharp.text.Image.GetInstance(); has many ways to generate and one of them is to pass a string of bits, was what I did as follows:

    while (dr2.Read())
    {
        Byte[] bytes = (Byte[])dr2[0];
        iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance(bytes);
        imagenesPDF.Add(img);
    }

This way I charge the Blob in bits and I pass it directly to the constructor.

Thank you very much for helping everyone. I hope someone serves you this

The problem with which you are finding is that the URI that can interpret iTextSharp has to go without the prefix data.

To solve this we would have several options:

Option 1: Remove the prefix data

iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance(imagenesPDF[idBlob-1].Replace("data:image/png;base64,",""));

We add the replace to eliminate the prefix that is bothering you by passing only the image in StringBase64 .

If the fact that you put the prefix data is only for use with iTextSharp , you could save yourself adding it and it should work correctly.

string base64String = Convert.ToBase64String(bytes, 0, bytes.Length);
url = base64String;

There we save to add the prefix and get only the image in StringBase64 .

Option 2: Directly pass the byte array of the image

With the premise of before, where only the image obtained from the database is used to process it with iTextSharp , we can directly pass it the array of bytes.

So instead of saving a list of strings, we save a list of array of bytes and use them directly.

To put a code analogous to the one you pass to us, it would be like this:

List<byte[]> imgPDF = new List<byte[]>();

OracleCommand cmd2 = new OracleCommand();
                cmd2.Connection = conn1;
                cmd2.CommandText = "select simbolo from simbolos_ll where idsimb=" + id;
                OracleDataReader dr2 = cmd2.ExecuteReader();
                dr2.Read();
                OracleLob blob = null;
                blob = dr2.GetOracleLob(0);
                byte[] bytes = (byte[])blob.Value;
                imgPDF.Add(bytes);

And the last line remains without modifications.

iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance(imagenesPDF[idBlob-1]);

imagenesPDF would now be an array of bytes and the image instance of iTextSharp should be executed correctly.