Asp. NET to save picture files to the database

Upload a picture, insert the name of the picture into the datasheet

protected voidBtnsend_click (Objectsender, EventArgs e) {        stringName =txtName.Text; stringPicturename = Fuppicturepath.filename;//Get file name (FileUpload id= "Fuppicturepath")        stringDatesend = DateTime.Now.ToString ();//Get current Time//get the suffix name of the uploaded file        stringLastName = picturename.substring (Picturename.lastindexof (".") +1); if(Lastname.tolower () = ="jpg"|| Lastname.tolower () = ="BMP"|| Lastname.tolower () = ="gif")        {            stringSavepath = Server.MapPath ("img/") + Picturename;//Set Save pathFupPicturePath.PostedFile.SaveAs (Savepath);//Save the uploaded picture            stringSqlins ="INSERT INTO Tb_picturesend (name,picturename,datesend) VALUES ('"+ Name +"', '"+ Picturename +"', '"+ Datesend +"')"; SqlConnection Con=Createcon (); Con.            Open (); SqlCommand com=NewSqlCommand (Sqlins, con); Com.            ExecuteNonQuery ();            Gvbind (); Con.        Close (); }        ElseResponse.Write ("<script>alert (' picture format is incorrect!! ') </script>"); }