Capitalize first letter of each word in a string

Sandhiya Priya
Oct 31
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Article

Step 1: Design Page – CapitalizeWords.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="CapitalizeWords.aspx.cs" Inherits="CapitalizeWords" %>

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Capitalize First Letter of Each Word - Real Time Example</title>
    <style>
        body {
            font-family: Arial;
            background-color: #f0f2f5;
            margin: 50px;
        }
        .container {
            width: 500px;
            margin: auto;
            background: white;
            border-radius: 8px;
            box-shadow: 0px 0px 10px #ccc;
            padding: 25px;
        }
        h2 {
            color: #1A2A80;
            text-align: center;
        }
        .form-control {
            width: 100%;
            padding: 8px;
            margin-top: 10px;
        }
        .btn {
            background-color: #7A85C1;
            color: white;
            border: none;
            padding: 10px;
            margin-top: 10px;
            border-radius: 5px;
            cursor: pointer;
            width: 100%;
        }
        .result {
            margin-top: 20px;
            font-weight: bold;
            color: #333;
            text-align: center;
            white-space: pre-line;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
        <div class="container">
            <h2>Capitalize First Letter of Each Word</h2>

            <asp:Label ID="lblInput" runat="server" Text="Enter a Sentence:"></asp:Label><br />
            <asp:TextBox ID="txtInput" runat="server" CssClass="form-control" placeholder="Example: welcome to asp.net webforms"></asp:TextBox><br />

            <asp:Button ID="btnCapitalize" runat="server" Text="Capitalize Words" CssClass="btn" OnClick="btnCapitalize_Click" /><br />

            <asp:Label ID="lblResult" runat="server" CssClass="result"></asp:Label>
        </div>
    </form>
</body>
</html>

Step 2: Backend Logic – CapitalizeWords.aspx.cs

using System;
using System.Globalization;

public partial class CapitalizeWords : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }

    protected void btnCapitalize_Click(object sender, EventArgs e)
    {
        string input = txtInput.Text.Trim();

        if (string.IsNullOrEmpty(input))
        {
            lblResult.Text = "Please enter a valid sentence.";
            lblResult.ForeColor = System.Drawing.Color.Red;
            return;
        }

        // Convert to Title Case using TextInfo
        TextInfo textInfo = new CultureInfo("en-US", false).TextInfo;
        string capitalized = textInfo.ToTitleCase(input.ToLower());

        lblResult.Text = $"Converted Sentence:\n{capitalized}";
        lblResult.ForeColor = System.Drawing.Color.Green;
    }
}

Real-Time Example Flow

Open CapitalizeWords.aspx in your browser.
Enter:
welcome to asp.net webforms
Click “Capitalize Words”

Output:

Converted Sentence:
Welcome To Asp.Net Webforms

Explanation

Step	Description
1	Get user input from TextBox.
2	Convert the input to lowercase for uniform formatting.
3	Use TextInfo.ToTitleCase() to capitalize each word’s first letter.
4	Display the final formatted string on the page.

Example Input / Output Table

Input	Output
welcome to asp.net webforms	Welcome To Asp.Net Webforms
hello world from c#	Hello World From C#
this is a real time example	This Is A Real Time Example
sandhiya v project	Sandhiya V Project
learn programming easily	Learn Programming Easily

Alternate Manual Method (Without Built-in Function)

If you want to capitalize manually:

string[] words = input.Split(' ');
string result = "";

foreach (string word in words)
{
    if (word.Length > 0)
        result += char.ToUpper(word[0]) + word.Substring(1).ToLower() + " ";
}

lblResult.Text = $"Converted Sentence:\n{result.Trim()}";