Remove AM PM from Time String using C#

Hi Vasanth, You needs to code a logic for this as follow.,

<div>
            <asp:TextBox ID="txtInput" runat="server"></asp:TextBox>
            <asp:TextBox ID="txtOutput" runat="server" ReadOnly="true"></asp:TextBox>
            <asp:Button ID="Button1" runat="server" Text="Convert" onclick="Button1_Click" />
            <asp:Label ID="lblError" runat="server"></asp:Label>
        </div>

protected void Button1_Click(object sender, EventArgs e)
        {
            string inputTime = txtInput.Text.ToUpper();
            string outputTime = "";
            string timeFormate = inputTime.Substring(inputTime.Length - 2);
            switch (timeFormate)
            {
                case ("AM"):
                    outputTime = inputTime.Replace("AM", "") + " : 00 ";
                    break;
                case ("PM"):
                    int hours = 0;
                    int.TryParse(inputTime.Replace("PM", ""), out hours);
                    outputTime = (hours + 12).ToString() + " : 00 ";
                    break;
                default:
                    lblError.Text = "Invalid Time";
                    break;
            }
            txtOutput.Text = outputTime;
        }

thanks,

rk.