Detecting Page Refresh in ASP.Net

Detecting Page Refresh in ASP.Net

There are certain Scenario when we want to detect whether the page was refreshed or not. Or, Whether It was a Postback or a F5 Refresh.. The following Code Snippet will help you out to resolve this Issue..

Design Part:

 <asp:Label ID="Label1" runat="server"></asp:Label>
 
    <asp:Button ID="Button1" runat="server" Text="Do postback at server side"
        onclick="Button1_Click" />

Coding:

private bool IsPageRefresh = false;
        public bool IsPageRefresh1
        {
            get { return IsPageRefresh; }
            set { IsPageRefresh = value; }
        }
 
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                ViewState["postids"] = System.Guid.NewGuid().ToString();
                Session["postid"] = ViewState["postids"].ToString();
            }
            else
            {
                if (ViewState["postids"].ToString() != Session["postid"].ToString())
                {
                    IsPageRefresh = true;
                }
                else
                {
                    IsPageRefresh = false;
                }
                Session["postid"] = System.Guid.NewGuid().ToString();
                ViewState["postids"] = Session["postid"].ToString();
            }
        }
 
        protected void Button1_Click(object sender, EventArgs e)
        {
            if (!IsPageRefresh1)
            {
                Label1.Text = "Page do normal postback";
            }
            else
            {
                Label1.Text = "Page refresh";
            }
        }

Now Check the Output by pressing F5 Key and by clicking the Button..

Fetch Machine Information C#.Net

Fetch Machine Information C#.Net

The following Code Snippet will help you to fetch the Machine/System Info like Processor Details, Machine Name, IP Address..

Create a Class File Named MachineInfo.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Management;
using System.Net;
using System.Diagnostics;
 
namespace GenericErrorHandling
{
    class MachineInfo
    {
        ManagementObjectSearcher query;
        ManagementObjectCollection result;
        string responseString;
        int responseInt;
 
        public string GetMachineName()
        {
            return Environment.MachineName.ToUpper();
        }
        public string GetOSVersion()
        {
            return Environment.OSVersion.VersionString;
        }
        public string GetProcessorCount()
        {
            return Environment.ProcessorCount.ToString();
        }
        public string GetIPAddress()
        {
            IPHostEntry ipEntry = Dns.GetHostEntry(Dns.GetHostName());
            IPAddress[] ipAddress = ipEntry.AddressList;
            return ipAddress[ipAddress.Length - 1].ToString();
        }
        public string GetTotalPhysicalMemory()
        {
            query = new ManagementObjectSearcher("SELECT * FROM Win32_LogicalMemoryConfiguration");
            result = query.Get();
            foreach (ManagementObject managementObject in result)
            {
                responseInt = Convert.ToInt32(managementObject["TotalPhysicalMemory"].ToString());
            }
            responseInt = (responseInt / 1024);
            responseString = responseInt.ToString() + " MB";
            return responseString;
        }
        public string GetAvailablePhysicalMemory()
        {
            PerformanceCounter counter = new PerformanceCounter("Memory", "Available Bytes");
            responseInt = ((int)Convert.ToInt64(counter.NextValue()) * (-1)) / (1024 * 1024);
            responseString = responseInt.ToString() + " MB";
            return responseString;
        }
 
        public string GetTotalVirtualMemory()
        {
            query = new ManagementObjectSearcher("SELECT * FROM Win32_LogicalMemoryConfiguration");
            result = query.Get();
            foreach (ManagementObject managementObject in result)
            {
                responseInt = Convert.ToInt32(managementObject["TotalVirtualMemory"].ToString());
            }
            responseInt = (responseInt / 1024);
            responseString = responseInt.ToString() + " MB";
            return responseString;
        }
 
        public string GetAvailableVirtualMemory()
        {
            query = new ManagementObjectSearcher("SELECT * FROM Win32_LogicalMemoryConfiguration");
            result = query.Get();
 
            foreach (ManagementObject managementObject in result)
            {
                responseInt = Convert.ToInt32(managementObject["AvailableVirtualMemory"].ToString());
            }
            responseInt = (responseInt / 1024);
            responseString = responseInt.ToString() + " MB";
            return responseString;
 
        }
        public string GetCpuFrequency()
        {
            query = new ManagementObjectSearcher("SELECT * FROM Win32_Processor");
            result = query.Get();
            foreach (ManagementObject managementObject in result)
            {
                responseInt = Convert.ToInt32(managementObject["CurrentClockSpeed"].ToString());
            }
            responseString = responseInt.ToString() + " MHz";
            return responseString;
        }
    }
 
}

Then Use the following Code Snippet to get the detailed info of the target Machine:

private void button1_Click(object sender, EventArgs e)
        {
            MachineInfo M = new MachineInfo();
            string msg = "Number Of Processor : " + M.GetProcessorCount();
            msg += "\nProcessor MHZ : " + M.GetCpuFrequency();
            msg += "\nMachine Name : " + M.GetMachineName();
            msg += "\nGetOSVersion : " + M.GetOSVersion();
            msg += "\nGetIPAddress : " + M.GetIPAddress();
            msg += "\nGetTotalPhysicalMemory : " + M.GetTotalPhysicalMemory();
            msg += "\nGetAvailablePhysicalMemory : " + M.GetAvailablePhysicalMemory();
            msg += "\nGetTotalVirtualMemory : " + M.GetTotalVirtualMemory();
            msg += "\nGetAvailableVirtualMemory : " + M.GetAvailableVirtualMemory();
 
            MessageBox.Show(msg);
 
        }

Implementing Ping in ASP.Net

Implementing Ping in ASP.Net

In this Article We will see, how can we ping a host name/ address to check whether it is up or not..

Pinging can be of great help to detect the current status of a website or to check the availability of the Server...

First of All add the following Namespaces:

using System.Net;
using System.Net.NetworkInformation;
using System.Text;

Then Create the  Design Page using the Code below:

<asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <ContentTemplate>
            <table width="600" border="0" align="center" cellpadding="5" cellspacing="1" bgcolor="#cccccc">
                <tr>
                    <td width="100" align="right" bgcolor="#eeeeee" class="header1">
                        Hostname/IP:
                    </td>
                    <td align="center" bgcolor="#FFFFFF">
                        <asp:TextBox ID="txtHost" runat="server"></asp:TextBox>
                        &nbsp;&nbsp;
                        <asp:Button ID="btnSubmit" runat="server" OnClick="btnSubmit_Click" Text="Submit" />
                    </td>
                </tr>
                <tr>
                    <td width="100" align="right" bgcolor="#eeeeee" class="header1">
                        Ping Results:
                    </td>
                    <td align="center" bgcolor="#FFFFFF">
                        <asp:TextBox ID="txtPing" runat="server" Height="400px" TextMode="MultiLine" Width="400px"></asp:TextBox>&nbsp;
 
                        <asp:Label ID="lblStatus" runat="server"></asp:Label>
                    </td>
                </tr>
            </table>
            <asp:Timer ID="Timer1" runat="server" Interval="4000" OnTick="Timer1_Tick">
            </asp:Timer>
        </ContentTemplate>
    </asp:UpdatePanel>

Finally Use the following Code Snippet in the Code Behind:

protected void Page_Load(object sender, EventArgs e)
        {
 
        }
        protected void btnSubmit_Click(object sender, EventArgs e)
        {
            try
            {
                lblStatus.Text = "";
                sendSubmit();
            }
            catch (Exception err)
            {
                lblStatus.Text = err.Message;
            }
        }
 
        protected void Timer1_Tick(object sender, EventArgs e)
        {
            if(txtHost.Text != "")
                sendSubmit();
        }
 
        public void sendSubmit()
        {
            Ping ping = new Ping();
            PingReply pingreply = ping.Send(txtHost.Text);
            txtPing.Text += "\r\nAddress: " + pingreply.Address + "\r\n";
            txtPing.Text += "Roundtrip Time: " + pingreply.RoundtripTime + "\r\n";
            txtPing.Text += "TTL (Time To Live): " + pingreply.Options.Ttl + "\r\n";
            txtPing.Text += "Buffer Size: " + pingreply.Buffer.Length.ToString() + "\r\n";
        }

What This Code will do for you is that It will ping the entered website in the text-box every 4 second and display the ping result in the textbox.

Check Browser Name Along-with Version C#.Net

Check Browser Name Along-with Version C#.Net

We can get the details of the Browser in which the web-application is running and using this information we can prevent running certain script or code if the browser is in-compatible..

Code-Snippet:

protected void Page_Load(object sender, EventArgs e)
        {
            System.Web.HttpBrowserCapabilities browser = Request.Browser;
            string s = "Browser Capabilities <br/>"
                + "Type = " + browser.Type + "<br/>"
                + "Name = " + browser.Browser + "<br/>"
                + "Version = " + browser.Version + "<br/>"
                + "Major Version = " + browser.MajorVersion + "<br/>"
                + "Minor Version = " + browser.MinorVersion + "<br/>"
                + "Platform = " + browser.Platform + "<br/>"
                + "Is Beta = " + browser.Beta + "<br/>"
                + "Is Crawler = " + browser.Crawler + "<br/>"
                + "Is AOL = " + browser.AOL + "<br/>"
                + "Is Win16 = " + browser.Win16 + "<br/>"
                + "Is Win32 = " + browser.Win32 + "<br/>"
                + "Supports Frames = " + browser.Frames + "<br/>"
                + "Supports Tables = " + browser.Tables + "<br/>"
                + "Supports Cookies = " + browser.Cookies + "<br/>"
                + "Supports VBScript = " + browser.VBScript + "<br/>"
                + "Supports JavaScript = " +
                    browser.EcmaScriptVersion.ToString() + "<br/>"
                + "Supports Java Applets = " + browser.JavaApplets + "<br/>"
                + "Supports ActiveX Controls = " + browser.ActiveXControls
                      + "<br/>"
                + "Supports JavaScript Version = " +
                    browser["JavaScriptVersion"]  + "<br/><br/>";
 
             
 
            Response.Write(s);
 
            switch (browser.Browser.ToUpper().Trim())
            {
                // WHY No OPERA BROWSER,because opera and chrome user agent is same, 
                // the browser.Browser will return Chrome value in Opera
                case "CHROME": Response.Write("<b>application support your browser</b>"); break;
                case "INTERNETEXPLORER": Response.Write("<b>application does not support your browser</b>"); break;
                case "FIREFOX": Response.Write("<b>application support your browser</b>"); break;
                case "SAFARI": Response.Write("<b>application support your browser</b>"); break;
                default: break;
            }
        }