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C# Filter Syntax Example - ASPNET CSharp String Method - Sample

Description: Here is a Filter Example that illustrates the C# Syntax in ASP.NET.

Example Webform Code:

< %@ Page Language="C#" AutoEventWireup="true" CodeFile="Filter.aspx.cs" Inherits="StringManipulation_Filter" %>
 
< !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
     <h1><asp:label ID="Label1" runat="server" Text="Label"></asp:label> </h1>
        <asp:label ID="Label2" runat="server" Text="Label"></asp:label>
    </div>
    </form>
</body>
</html>

Example Code Behind:

using System;
using System.IO;
using System.Data;
using System.Text;
 
 
 
 
// This example is from http://idealprogrammer.com
// It shows how you can use Filter syntax in C-Sharp ASP.NET
//****************************************************************************************
// Purpose: Returns a zero-based array containing a subset of a String array based on
// specified filter criteria.
//
// Syntax: 	Filter (Source As String(), Match As String, Include As Boolean, _
// Compare As CompareMethod) As String()
//
// Source - Required - one-dimensional string array to be searched
// Match - required - string to search for
// Include - optional - Boolean value indicating whether to return substrings that 
// include or exclude Match.
// Compare - optional - numeric value indicating compare method - CompareMethod.Binary
// or CompareMethod.Text
//****************************************************************************************
 
 
public partial class StringManipulation_Filter : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Label1.Text = "Example #1: 	Filter(Source, Match, Include,Compare) As String";
        string[] myStrings = new string[4];
        myStrings[0] = "This";
        myStrings[1] = "is";
        myStrings[2] = "my";
        myStrings[3] = "string";
 
        string[] FilteredStrings = null;
        FilteredStrings = Microsoft.VisualBasic.Strings.Filter(myStrings, "is", true, Microsoft.VisualBasic.CompareMethod.Text);
        StringBuilder sb = new StringBuilder();
        foreach (string myItem in FilteredStrings)
        {
            sb.Append(myItem + "<br />"); // Returns ["This", "Is"].
        }
        Label2.Text = sb.ToString();
 
    }
}

Example Connection String: