New App and Utility

People is the class whose object needs to be converted in XML string which later can be stored in a DB field or as XML file. public class PersonDetail { public string FirstName { get ; set ; } public string LastName { get ; set ; } } public class People { public People () { PeopleList = new List<ProductImage>(); } public List<PersonDetail> PeopleList{ get ; set ; } } Function to convert class object to XML string: public static string SerializeToXml<T>(T value ) { StringWriter writer = new StringWriter(CultureInfo.InvariantCulture); XmlSerializer serializer = new XmlSerializer( typeof (T)); serializer.Serialize(writer, value ); return writer.ToString(); } C# code to convert class object to XML string: People peopleDetailList = new People(); PersonDetail pDetail = new PersonDetail (); ...

Below function demonstrates how to enable, disable and run the already created scheduled task. It will first check if the task exists in task scheduler: public static void updateUserTaskInScheduler ( string action) { try { ProcessStartInfo startInfo = new ProcessStartInfo(); startInfo.FileName = "cmd.exe" ; startInfo.Arguments = "/C schtasks /query /TN <<TaskNameWithQuotes>>; //Check if task exists startInfo.RedirectStandardOutput = true ; startInfo.UseShellExecute = false ; startInfo.CreateNoWindow = true ; startInfo.WindowStyle = ProcessWindowStyle.Hidden; if (System.Environment.OSVersion.Version.Major < 6 ) { startInfo.Verb = "runas" ; } using (Process process = Process.Start(startInfo)) { ...

Dotted circle can be used for showing circular progress. Here is the code to draw a dotted/dashed circle using C# in windows form application: using System ; using System.Collections.Generic ; using System.ComponentModel ; using System.Data ; using System.Drawing ; using System.Linq ; using System.Text ; using System.Windows.Forms ; using System.Drawing.Drawing2D ; using System.Threading ; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1 () { InitializeComponent(); } int angle = 0 ; int Startangle = 0 ; private void Form1_Load ( object sender, EventArgs e) { } private void panel1_Paint ( object sender, PaintEventArgs e) { //draw a dashed cricle using(Graphics g = panel1.CreateGraphics()) { System.Drawing.Rectangle rectangle = new System.Drawi...

Convert content of XML file to JSON string in C#.Net The below function will convert the content of XML file to JSON string: private string convertXMLToJSON () { string xmlLogPath = "<<Path to the xml file>>" ; // Load the XML file var xDocument = System.Xml.Linq.XDocument.Load(xmlLogPath); // Read the XML file content and write it to string string xml = xDocument.ToString(); // Load the XML string XmlDocument doc = new XmlDocument(); doc.LoadXml(xml); // Convert the XML string to JSON string string jsonText = JsonConvert.SerializeXmlNode(doc); //Release the memory doc = null ; xmlLogPath = null ; xml = null ; xDocument = null ; //Return the JSON string return jsonText; } IMPORTANT NOTE: Releasing object memory is...

In windows form combo box control sometimes while adidng items dynamically we have items whose width is greater than width of combox box control. In this case for making UI more user friendly we can show tooltip over such item. Here is the sample C# code to display such tooltip:  Add a Tooltip control on the form.  Add following code : this . combo_box1 . DropDownStyle = System . Windows . Forms . ComboBoxStyle . DropDownList; this . combo_box1 . DrawMode = DrawMode . OwnerDrawFixed; this . combo_box1 . DrawItem += new DrawItemEventHandler(combo_box1_DrawItem); this . combo_box1 . DropDownClosed += new EventHandler(combo_box1_DropDownClosed); this . combo_box1 . MouseLeave += new EventHandler(combo_box1_Leave); void combo_box1_DrawItem( object sender, DrawItemEventArgs e) { if (e . Index < 0 ) { return ; } string text = combo_box1 . GetItemText(combo_box1 . Items[...

Code to Resize Image (with Sample Application) In this post I am sharing the code to resize an image using C#.NET. Also sharing the code to preview and save resized image in multiple formats (jpeg, bmp, png, gif, tiff). Code to Resize Image for given width and height public static Bitmap ResizeImage(Image image, int width, int height) { var destRect = new Rectangle(0, 0, width, height); var destImage = new Bitmap(width, height); destImage.SetResolution(image.HorizontalResolution, image.VerticalResolution); using ( var graphics = Graphics.FromImage(destImage)) { graphics.CompositingMode = CompositingMode.SourceCopy; graphics.CompositingQuality = CompositingQuality.HighQuality; graphics.InterpolationMode = InterpolationMode.HighQualityBicubic; graphics.SmoothingMode = SmoothingMode.HighQuality; ...

Label control supports transparent property but picture box do not work as container control. So even if we add label control on picturebox the parent control will become main form or any other underlying container control. Hence on adding label control on picture box and making label control background  transparent shows background of form or any other container control is rather than picture box. This can be changed using simple code in form constructor. We need to change parent property of label and recalculate its location because it is now relative to picturebox instead of form. Hetre is the sample code to do this -  public Form1() {         InitializeComponent();         var pos = this.PointToScreen(label1.Location);         pos = pictureBox1.PointToClient(pos);         label1.Parent = pictureBox1;         label1.Location = pos;         labe...

Recursively delete files from given directory keeping the directory structure intact C#.NET To get all the files present in the subdirectories of the given directory, use "SearchOption.AllDirectories" DirectoryInfo  DirInfo   =  new   DirectoryInfo ( directoryPath ); DirInfo . GetFiles   ( "*" ,  SearchOption . AllDirectories   ). ToList (). ForEach ( file   => file . Delete ()); The above code will delete all the files for the given directory while keeping the structure of directory intact. To send files in recycle bin instead of deleting it from system use "FileSystem.DeleteFile" function of VisualBasic assembly. Add reference to VisualBasic dll and add "using Microsoft.VisualBasic.FileIO" DirInfo   =   new   DirectoryInfo (   directoryPath   ); List < FileInfo >  fileList   =   DirInfo . GetFiles ( "*" ,   SearchOption . AllDirectories ). ToList (); foreach ...

Here is the sample LINQ C# code to split list into sublists public   static   List < List <T>> Split < T >(   this   List   <T>  source ,  int   NumberOfGroup   )         {              return   source                 . Select (( x   ,  i )=> new   {  Index   =  i ,  Value   =  x   })                 . GroupBy ( x   =>  x . Index   /  NumberOfGroup   )                 . Select ( x   =>  x . Select   ( v   =>  v . Value ). ToList ())        ...

Sometimes in case of Windows form application where we have multiple windows opened and we need to find on which window user has clicked. One method to find this is to capture the mouse click message.  Here is the sample code to close form if mouse click happen outside the form.    public   partial   class   frmTest  :   Form     {           class   Window CaptureChanged   :   NativeWindow         {               public   CaptureChanged   OnCaptureChanged ;               protected   override   void   WndProc ( ref   Message   m )             {             ...