Dawood Ahmed Programming Tips

Visual Studio Formatting Issues / Displayed JavaScript Code With Comment Its also known issue when copy text/code in visual studio showing "formatting selection" popup it will be also solved by below solution Solved: Goto in visual studio ( Options --> Text Editor --> JavaScript / TypeScript --> Language Service )

Solved: You have to add [Serializable] attribute in the class and also add inherited class if you extend on that class. Why? Because you have created List or Dictionary type of property Inner Exception: System.ArgumentException: Error serializing value 'ModelClass' of type 'ModelClass.' ---> System.Runtime.Serialization.SerializationException: Type 'IMR.Model.Models.Admin.UserInOutLogSearch' in Assembly 'IMR.Model, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' is not marked as serializable.    at System.Runtime.Serialization.FormatterServices.InternalGetSerializableMembers(RuntimeType type)    at System.Runtime.Serialization.FormatterServices.GetSerializableMembers(Type type, StreamingContext context)    at System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitMemberInfo()    at System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitSerialize(Object obj, ISurrogateSelector surrogateSelector, StreamingCon

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)                 IsLetter =  false ;              else                 IsLetter =  true ;              if  (IsLetter)                 firstRemovableStr = firstRemovableStr + input[i];         }         input = firstRemovableStr;         IsLetter =  false ;          for  ( int  k = 0; k < input.Length; k++)         {              if  (! char .IsLetter(input[(input.Length - k) - 1]) && !IsLetter)                 IsLetter =  false ;              else                 IsLetter =  true ;