Dawood Ahmed Programming Tips

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, Strea...

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)             ...

Solved : These options will be help full for resolving the issue. 1- Convert base64 to blob var blob = b64toBlob("JVBERi0xLjcKCjEgMCBvYmogICUgZW50cnkgcG9pbnQKPDwKICAvVHlwZSAvQ2F0YWxvZwog' +   'IC9QYWdlcyAyIDAgUgo+PgplbmRvYmoKCjIgMCBvYmoKPDwKICAvVHlwZSAvUGFnZXMKICAv' +   'TWVkaWFCb3ggWyAwIDAgMjAwIDIwMCBdCiAgL0NvdW50IDEKICAvS2lkcyBbIDMgMCBSIF0K' +   'Pj4KZW5kb2JqCgozIDAgb2JqCjw8CiAgL1R5cGUgL1BhZ2UKICAvUGFyZW50IDIgMCBSCiAg' +   'L1Jlc291cmNlcyA8PAogICAgL0ZvbnQgPDwKICAgICAgL0YxIDQgMCBSIAogICAgPj4KICA+' +   'PgogIC9Db250ZW50cyA1IDAgUgo+PgplbmRvYmoKCjQgMCBvYmoKPDwKICAvVHlwZSAvRm9u' +   'dAogIC9TdWJ0eXBlIC9UeXBlMQogIC9CYXNlRm9udCAvVGltZXMtUm9tYW4KPj4KZW5kb2Jq' +   'Cgo1IDAgb2JqICAlIHBhZ2UgY29udGVudAo8PAogIC9MZW5ndGggNDQKPj4Kc3RyZWFtCkJU' +   'CjcwIDUwIFRECi9GMSAxMiBUZgooSGVsbG8sIHdvcmxkISkgVGoKRVQKZW5kc3RyZWFtCmVu' +   'ZG9iagoKeHJlZgowIDYKMDAwMDAwMDAwMCA2NTUzNSBmIAowMDAwMDAwMDEwIDAwMDAwIG4g' + ...

Solved:  When we use conditions on Eval many times we got the error, two ways use solve this error. 1- You make a function what you needs and bind before eval Example: bool ShowAge ( int age ) { return ( age > 18) ; } and call where you use eval Visible=' <% # ShowAge(Eval("Age")) %>' 2- You make a ItemCommand event and define condition on it protected void rptUser_ItemDataBound ( object source, RepeaterCommandEventArgs e ) { TextBox txtAge = ( TextBox )e.Item.FindControl("txtAge"); if ( DataBinder .Eval(e.Item.DataItem, "Age") > 18) { txtAge.Visible = false ; } ; }

//change all "IDofEditor" to the id of your editor; I haven't figured out how to find it less explicitly //insert text CKEDITOR . instances . IDofEditor . insertText ( 'some text here' ); //insert a link (or other tags, modify as needed) //this example uses the selected text for the link text //if removing getSelection() and just inserting it all, you MUST have some link text or it will NOT insert; also if the user selected text first anyway it will change it to "NaN". //the \x22 represents a double quote, thus easy to use within an html onclick //getNative() gets the text, otherwise you get an object CKEDITOR . instances . IDofEditor . insertHtml ( '<a href=\x22my_link\x22>' + CKEDITOR . instances . IDofEditor . getSelection (). getNative () + '</a>' ); //you could also prompt the user for the link text (and title and link or anything else); very fast entry! CKEDITOR . instances . IDofEditor . insertHtml ( ...

if you want to float left or right with Predefined classes of bootstrap Example:  HTML <div class="pull-left"></div> <div class="pull-right"></div> Asp.Net <asp:LinkButton ID="lnkCancel" CssClass="btn btn-primary pull-left" runat="server">Cancel</asp:LinkButton> <asp:LinkButton ID="lnkSave" CssClass="btn btn-primary pull-right" runat="server">Save</asp:LinkButton>

Easy you set drop down list datasourse in repeater 1- Create ItemDataBound event 2- Check ListItemType one by one 3- Find dropdown which you take on repeater 4- DataSource protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)         {             try             {                 if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)                 {                     DropDownList ddl = (DropDownList)e.Item.FindControl("ddlAbc");                     DataTable dt = GetDataSource();                     ddl.DataSource = lstReferencePoint;                ...

Often we get as a collection or object when we test API and get return to a string like a plain text or auto generated ID. It is simple to view that code  response.Content.ReadAsStringAsync().Result

The tablix is invalid. The value for the DataSetName property is missing. Solved: This is simply define any datasource field to rdlc report column.its cannot be empty without any passing dataset field.

Its mostly use assign only one variable or object Example : you have a variable and you want to check null value int a = 100 ; string result = string .Empty ; if ( a < 20 ) { result = "a variable less than 20" ; } else { result = "a variable not less than 20" ; } you can use instead of old condition because its a major benefit to reduce line of code int a = 100 ; string result = a < 20 ? "a variable less than 20" : "a variable not less than 20" ;

ConfigurationManager not show ConnectionStrings until you will not add reference System.Configuration dll, right click on Project -- Add Reference after click to Assemblies then Framework and find System.Configuration dll vs2010: Project -- Add Reference after click to .NET components and find System.Configuration dll If also add this reference but then again its not showing its a simple way to solve you add System.Configuration.ConfigurationManager.ConnectionStrings

insert collection of data in SQL table is called bulk data manipulations, this is the simple and best way to add multiple row with the single collection now define a step's to easy to understand 1- You make a user defined table types  CREATE TYPE [dbo].[TTMultiRowCollection] AS TABLE(     [ID] [int] NULL,     [Name] [varchar(50)] NULL, ) 2- Create SP and take parameter table type as well as READONLY keyword. CREATE PROCEDURE [dbo].[AddMultiRow](@MultiRowCollection TTMultiRowCollection READONLY) AS BEGIN     INSERT INTO [User](ID,Name)         SELECT ID, Name FROM @MultiRowCollection END 3-  Create table in c# for passing the sql DataTable table = new DataTable(); table.Columns.Add("ID", typeof(int)); table.Columns.Add("Name", typeof(string)); table.Rows.Add(1, "Dawood"); table.Rows.Add(2, "Ahmed"); 4- Connect to SQL server and passing the table from stored procedure  us...