Richard S.R. Han Memo: C#

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CJK characters identify sample


        /// 
        /// Ref:
        /// http://en.wikipedia.org/wiki/CJK_Unified_Ideographs
        /// http://blog.oasisfeng.com/2006/10/19/full-cjk-unicode-range/
        /// http://www.unicode.org/ucd/filemoved.html
        /// 

        /// 
        /// 
        static public string CommontCJKIdentify(string text)
        {
            if (text.Any(c => c >= 0x3040 && c <= 0x309F))
            { return "J"; }
            else if (text.Any(c => c >= 0X30A0 && c <= 0x30FF))
            { return "J"; }
            else if (text.Any(c => c >= 0X31F0 && c <= 0x31FF))
            { return "J"; }
            else if (text.Any(c => c >= 0XAC00 && c <= 0xD7AF))
            { return "K"; }
            else if (text.Any(c => c >= 0X1100 && c <= 0x11FF))
            { return "K"; }
            else if (text.Any(c => c >= 0X3130 && c <= 0x318F))
            { return "K"; }
            else if (text.Any(c => c >= 20000 && c <= 0xFA2D))
            {
                return "C";
            }
            else
            { return "Others"; }            
        }

[Umbraco] Add more than one TinyMCE datatype on page or usercontrol

        private void addTinyMCEControl(Control targetPlaceHolder, TabPage tp)
        {

            DataTypeDefinition htmlEditorDataType =
                   DataTypeDefinition.GetDataTypeDefinition(new Guid("A521511A-7BEE-4C5B-8D7B-4B06B57392B3"));

            //The other way can get datatype id directly.
            //DataTypeDefinition htmlEditorDataType = DataTypeDefinition.GetDataTypeDefinition(-87);

            TinyMCE umbracoTinyMCEEditor = (TinyMCE)htmlEditorDataType.DataType.DataEditor;

            string toolbar_id = string.Empty;

            if (umbracoTinyMCEEditor != null)
            {
                if (umbracoTinyMCEEditor.config["umbraco_toolbar_id"] != null)
                    umbracoTinyMCEEditor.config.Remove("umbraco_toolbar_id");
                toolbar_id = "tinyMCEMenu_" + targetPlaceHolder.ClientID;
                umbracoTinyMCEEditor.config.Add("umbraco_toolbar_id", toolbar_id);
                targetPlaceHolder.Controls.Add(umbracoTinyMCEEditor);
                tp.Menu.NewElement("div", toolbar_id, "tinymceMenuBar", 0);
            }
        }

Reference:

[LINQ] Get child controls


using System.Collections.Generic ;
using System.Linq;
/// 
/// Get all child & sub-child controls within a control by type
/// 

/// The control we're searching in form/page.
/// The control type we're looking for (i.e; TextBox)
/// 
public IEnumerable < Control > GetAllChildControls(Control control, Type type = null)
{
    var controls = control.Controls.Cast< Control >();
            
    if (type == null)
        return controls.SelectMany(ctrl => GetAllChildControls(ctrl, type)).Concat(controls);
    else
        return controls.SelectMany(ctrl => GetAllChildControls(ctrl, type)).Concat(controls).Where(c => c.GetType() == type);
}


//How to use.
IEnumerable< Control > textBoxControls = GetAllChildControls(this, typeof(TextBox));
IEnumerable< Control > allConrols = GetAllChildControls(this);

Reference : http://www.dreamincode.net/code/snippet5634.htm

[Reflection] Get and Set values of Properties


object sampleObj = new object();
foreach (PropertyInfo info in sampleObj.GetType().GetProperties())
{
    //  To Get value
    if (info.CanRead)
    {
        object o = info.GetValue(sampleObj, null);
    }


    //   To Set value          
    object myValue = "Something";
    if (info.CanWrite)
    {
        info.SetValue(sampleObj, myValue, null);
    }
}

[Exception] Collection was modified; enumeration operation may not execute

Solution : replace for each loop to standard loop


            ArrayList items = new ArrayList();
           
            //foreach (var item in items)
            //{
            //    //do something
            //}                

            for (int i = 0; i < items.Count; i++)
            {
                //do something
            }

Referece: http://alitarhini.wordpress.com/2011/04/06/collection-was-modified-enumeration-operation-may-not-execute/

.NET C# byte[] to String sample

Sample array & string

byte[] array = new byte[] { 0x48, 0x65, 0x6C, 0x6C, 0x6F, 
                            0x57, 0x6F, 0x72, 0x6C, 0x64 }; //"HelloWorld"

byte[] to String

string str = System.Text.Encoding.Default.GetString(array);
string str = System.Text.Encoding.ASCII.GetString(array);

byte[] to String

System.Text.ASCIIEncoding converter = new System.Text.ASCIIEncoding();
string str = converter.GetString(array);

HexString to byte[]

string str = ByteArrayToHex(array);
public static string ByteArrayToHex(byte[] array)
{
    System.Text.StringBuilder sb = new System.Text.StringBuilder();
    foreach (byte element in array)
        sb.Append(element.ToString("X2"));
    return sb.ToString();
}

.NET C# String to byte[] sample

Sample array & string

byte[] array = new byte[] { 0x48, 0x65, 0x6C, 0x6C, 0x6F, 
                            0x57, 0x6F, 0x72, 0x6C, 0x64 }; //"HelloWorld"

String to byte[]

byte[] array= System.Text.Encoding.Default.GetBytes("HelloWorld");
byte[] array= System.Text.Encoding.ASCII.GetBytes("HelloWorld");

String to byte[]

System.Text.ASCIIEncoding converter = new System.Text.ASCIIEncoding();
byte[] array = converter.GetBytes("HelloWorld");

HexString to byte[]

byte[] array = HexToByteArray("48656C6C6F56F726C64");
private static byte[] HexToByteArray(string hexString)
{
    byte[] returnBytes = new byte[hexString.Length / 2];
    for (int i = 0; i < returnBytes.Length; i++)
        returnBytes[i] = System.Convert.ToByte(hexString.Substring(i * 2, 2), 16);
    return returnBytes;
}

HexString to byte

byte element = HexToByte("48");
private static byte HexToByte(string hexString)
{
    if (hexString.Length > 2 || hexString.Length <= 0)
        throw new System.ArgumentException("hex must be 1 or 2 characters in length");
    byte newByte = byte.Parse(hexString, System.Globalization.NumberStyles.HexNumber);
    return newByte;
}

Console array Result

foreach (byte element in array)
{
	System.Console.WriteLine("{0}\t{1}\t{2} ", 
		(char)element, element, element.ToString("X2"));

}
/*
    H	72 48	
    e	101	65	
    l	108	6C	
    l	108	6C	
    o	111	6F	
    W	87	57	
    o	111	6F	
    r	114	72	
    l	108	6C	
    d	100	64	
*/