Dawood Ahmed Programming Tips

Editable pdf file textbox, checkbox, etc. doesn't write after creating pdf file from itextsharp this file should not be editable code below: pdfStamper.FormFlattening =  true ;

If you have base64 code image or image path, easily can add image in PDF from iTextSharp. Code below: PdfReader pdfReader =  new  PdfReader( "C:\\file.pdf" ); PdfStamper pdfStamper =  new  PdfStamper(pdfReader,  new  FileStream( "target save path" , FileMode.Create)); string  imagepath =  "base64 image code" ; Byte[] bytes = Convert.FromBase64String(Regex.Replace(imagepath, @ "^data:image\/[a-zA-Z]+;base64," ,  string .Empty)); var  pdfContentByte = pdfStamper.GetOverContent(1);  // page number iTextSharp.text.Image image1 = iTextSharp.text.Image.GetInstance(bytes); image1.SetAbsolutePosition(140, 70); image1.ScalePercent(20f); pdfContentByte.AddImage(image1); pdfStamper.Close();

Finding item in dropdownlist from a string. ddlStudent.Items.Contains( new  ListItem("Dawood"))

Sometimes we need to remove special character from staring and ending of a string. private   static   string  RemoveFirstAndLastSpecialCharacter( string  input) {      if  (input !=  string .Empty)     {          string  firstRemovableStr =  string .Empty;          string  lastRemovableStr =  string .Empty;          bool  IsLetter =  false ;          for  ( int  i = 0; i < input.Length; i++)         {              if  (! char .IsLetter(input[i]) && !IsLetter)             ...