Scrolling Title Effect

Scrolling title effect using javascript

Formatting the html string while making a substring

Getting a substring of text containing HTML tags is more tricky than you think. Assume that you want the first 10 characters of the following:

"<p>this is paragraph 1<p><p>this is paragraph 2</p>"

The output would be:

"<p>this is"

As you can see, the returned text contains an unclosed P tag. If this is rendered to a page, subsequent content will be affected by the open P tag. Ideally, the preferred output would close any unclosed HTML tags in reverse of when they were opened:

"<p>this is</p>"

Here is a function that returns a subtring of HTML, making sure that no tags are left unclosed:

 

using System;
using System.Collections.Generic;

public static class StringUtility
{
    public static string HTMLSubstring( string html, int length )
    {
        if ( html == null )
        {
            throw new ArgumentNullException( "html" );
        }

        List<string> unclosedTags = new List<string>();

        bool isQuoted = false;

        if ( html.Length > length )
        {
            for ( int i = 0; i < html.Length; i++ )
            {
                char currentCharacter = html[i];

                char nextCharacter = ' ';

                if ( i < html.Length - 1 )
                {
                    nextCharacter = html[i + 1];
                }

                // Check if quotes are on.
                if ( !isQuoted )
                {
                    if ( currentCharacter == '<' && nextCharacter != ' ' && nextCharacter != '>' )
                    {
                        if ( nextCharacter != '/' ) // Open tag.
                        {
                            int startIndex = i + 1;

                            if ( startIndex < html.Length )
                            {
                                int finishIndex = html.IndexOf( ">", startIndex );

                                if ( finishIndex > 0 )
                                {
                                    if ( html[finishIndex - 1] != '/' )
                                    {
                                        string tag = html.Substring( startIndex, finishIndex - startIndex );

                                        if ( tag.Contains( " " ) )
                                        {
                                            int temporaryFinishIndex = html.IndexOf( " ", startIndex );

                                            tag = html.Substring( startIndex, temporaryFinishIndex - startIndex );
                                        }

                                        if ( !tag.Equals( "br", StringComparison.InvariantCultureIgnoreCase ) )
                                        {
                                            unclosedTags.Add( tag );
                                        }
                                    }

                                    int tagLength = finishIndex + 1 - i;

                                    length += tagLength;

                                    i = finishIndex;
                                }
                            }
                        }
                        else if ( nextCharacter == '/' ) // Close tag.
                        {
                            int startIndex = i + 2;

                            if ( startIndex < html.Length )
                            {
                                int finishIndex = html.IndexOf( ">", startIndex );

                                if ( finishIndex > 0 )
                                {
                                    string tag = html.Substring( startIndex, finishIndex - startIndex );

                                    // FILO.
                                    int index = unclosedTags.LastIndexOf( tag );

                                    if ( index >= 0 )
                                    {
                                        unclosedTags.RemoveAt( index );

                                        int tagLength = finishIndex + 1 - i;

                                        length += tagLength;

                                        i = finishIndex;
                                    }
                                }
                            }
                        }
                    }
                }
                else
                {
                    if ( currentCharacter == '"' )
                    {
                        isQuoted = false;
                    }
                }

                if ( i >= length )
                {
                    html = string.Format( "{0}...", html.Substring( 0, i ) );

                    unclosedTags.Reverse();

                    foreach ( string unclosedTag in unclosedTags )
                    {
                        html += string.Format( "</{0}>", unclosedTag );
                    }
                }
            }
        }

        return html;
    }
}

Source by : - http://andrewgunn.blogspot.com/2008/06/html-substring-in-cnet.html

How to generate a random string

How to generate a random string in ASP.Net C#

 When i was searching on internet for the solution of a problem that how can i generate a random string  from the list of chosen characters of chosen

length i came to a solution which is given below,that is very simple ,neat and clean where you just enter the char-pool from which you want to generate

your random string and choose the length of string this will give the perfect answer for your problem.

public void GetRandomString()

    {

        Random rnd = new Random();

        int length = 6;

        string charPool

        = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890";

        StringBuilder rs = new StringBuilder();



        while (length-- > 0)

            rs.Append(charPool[(int)(rnd.NextDouble() * charPool.Length)]);



         lbl_mess.Text= rs.ToString();

    }

This help me great and hope you will also enjoy this!!!!!!!!!!!