Listbox double click get image on image control

Question

i have tried below code to get image on image control but when i double click image not getting and display like crack. what is wrong in this code. ?

 

i tried to display stored binary image from sql server to image control. 

after double click on listbox control.  

string id = searchRecord.SelectedItem.Value;
                if (dt.Rows.Count > 0)
                {
                    byte[] bytes = (byte[])dt.Rows[0]["V_IMAGE"];
                    string base64String = Convert.ToBase64String(bytes, 0, bytes.Length);
                    vImage.ImageUrl = "data:image/jpg;base64" + base64String;

                }