Url rewriting using global.asax

To rewrite the url only using asax file like www.domain.com/items.aspx?ID=1
to www.domain.com/fackurl.aspx?ID=1 Add the below content in the Global.asax file

protected void Application_BeginRequest(object sender, EventArgs e)
{
    HttpContext myContext = HttpContext.Current;
    Regex rewrite_regex = new Regex(@"(.+)\/((.+)\.aspx)", RegexOptions.IgnoreCase);
    try
    {
        //see if we need to rewrite the URL
        Match match_rewrite = rewrite_regex.Match(myContext.Request.Path.ToString());
        if (match_rewrite.Groups[2].Captures[0].ToString() == "Default.aspx")
        {
            if (Request.QueryString["ID"] != null)
                myContext.RewritePath("~/Mail/Index.aspx?ID=" + Request.QueryString["ID"].ToString(), true);
        }
    }
    catch (Exception ex) { }
}

Tags: url rewriting in asp.net sample code, url rewriting using global.asax asp net, url rewriting with global.asax, url rewriting using global.asax asp net

URL Rewriting in ASP.NET 2.0

In order to rewrite the url called www.domain.com/myfolder/items.aspx?Item_ID=1 to
www.domain.com/items/1 or www.domain.com/items/1.html or www.domain.com/items/1.aspx follow the steps

1. Create an xml file under root directory named as Rule.xml and write this code

<?xml version="1.0" encoding="utf-8" ?>
<urlrewrites>
  <rule>
    <url>item/(.*)</url>
    <rewrite>myfolder/items.aspx?Item_ID=$1</rewrite>
  </rule>
  <rule>
    <url>item/(.*)\.html</url>
    <rewrite>myfolder/items.aspx?Item_ID=$1</rewrite>
  </rule>
  <rule>
    <url>item/(.*)\.aspx</url>
    <rewrite>myfolder/items.aspx?Item_ID=$1</rewrite>
  </rule>
  <rule>
    <url>Products/Cart/(.*)\.aspx</url>
    <rewrite>Cart.aspx?ID=$1</rewrite>
  </rule>
</urlrewrites>

2. Add the below content in the Global.asax file

void Application_BeginRequest(Object sender, EventArgs e)
{
    string sPath = Context.Request.Path;//To overcome Postback issues, stored the real URL.
    Context.Items["VirtualURL"] = sPath;
    Regex oReg;
    System.Xml.XmlDocument xmlDoc = new System.Xml.XmlDocument();
    xmlDoc.Load(Server.MapPath("~/Rule.xml"));
    foreach (System.Xml.XmlNode oNode in xmlDoc.DocumentElement.SelectNodes("rule"))
    {
        oReg = new Regex(oNode.SelectSingleNode("url/text()").Value);
        Match oMatch = oReg.Match(sPath); if (oMatch.Success)
        {
            sPath = oReg.Replace(sPath, oNode.SelectSingleNode("rewrite/text()").Value); break;
        }
    }
    Context.RewritePath(sPath);
}

3. Create a class file named as Form.cs and paste this code

using System;
using System.Web.UI;
using System.Web;

public class FormRewriterControlAdapter : System.Web.UI.Adapters.ControlAdapter
{
    protected override void Render(System.Web.UI.HtmlTextWriter writer)
    {
        base.Render(new RewriteFormHtmlTextWriter(writer));
    }
}

public class RewriteFormHtmlTextWriter : HtmlTextWriter
{

    public RewriteFormHtmlTextWriter(HtmlTextWriter writer)
        : base(writer)
    {
        this.InnerWriter = writer.InnerWriter;
    }

    public RewriteFormHtmlTextWriter(System.IO.TextWriter writer)
        : base(writer)
    {
        base.InnerWriter = writer;
    }

    public override void WriteAttribute(string name, string value, bool fEncode)
    {
        // If the attribute we are writing is the "action" attribute, and we are not on a sub-control, 
        // then replace the value to write with the raw URL of the request - which ensures that we'll 
        // preserve the PathInfo value on postback scenarios 
        if ((name == "action"))
        {
            HttpContext Context = default(HttpContext);
            Context = HttpContext.Current;
            if (Context.Items["ActionAlreadyWritten"] == null)
            {
                // Because we are using the UrlRewriting.net HttpModule, we will use the 
                // Request.RawUrl property within ASP.NET to retrieve the origional URL 
                // before it was re-written. You'll want to change the line of code below 
                // if you use a different URL rewriting implementation. 
                value = Context.Request.RawUrl;
                // Indicate that we've already rewritten the 
's action attribute to prevent 
                // us from rewriting a sub-control under the control 
                Context.Items["ActionAlreadyWritten"] = true;
            }
        }
        base.WriteAttribute(name, value, fEncode);
    }
}

4. Write this line of code in every page which you want mask the url

protected override void Render(HtmlTextWriter writer)

{
    if (HttpContext.Current.Items["VirtualURL"] != null)
    {
        string sVirURL = HttpContext.Current.Items["VirtualURL"].ToString();
        RewriteFormHtmlTextWriter oWriter = new RewriteFormHtmlTextWriter(writer);//, sVirURL);
        base.Render(oWriter);
    }
}

5. To use this <a href="item/1">Mouse</a>

6. In items.aspx use like this

if (!IsPostBack)
   if (Request.QueryString["Item_ID"] != null)
 string id = Request.QueryString["Item_ID"].ToString();

Tags: URL Rewriting in ASP.NET 2.0,URL Rewriting with ASP.NET 2.0,url rewriting in asp.net,url rewriting, asp.net url rewriting example, url rewriting sample project,url rewriting in asp.net sample code

How to pragmatically retrieve smtp server details from web.config file

Saving the smtp details in web.config file like this:

<system.net>

<mailSettings>

<smtp from="username@gmail.com">

<network host="smtp.gmail.com" port="587" userName="username@gmail.com" password="password" defaultCredentials="true"/>

</smtp>

</mailSettings>

</system.net>

and retrieving the smtp detail in cs file follow like this:  

SmtpSection MailSettings = (SmtpSection)ConfigurationManager.GetSection("system.net/mailSettings/smtp");

if (settings != null)

{

    string From = MailSettings.From;

    int Port = MailSettings.Network.Port;

    string Host = MailSettings.Network.Host;

    string Password = MailSettings.Network.Password;

    string UserName = MailSettings.Network.UserName;

}

Tags: Smtp server details from web.config file, gmail smtp settings in web.config file

Downloading Images from external url

string imgFullPath = "https://www.google.co.in/images/srpr/logo3w.png";

//get the full path 

string FileName = Path.GetFileNameWithoutExtension(imgFullPath) + Path.GetExtension(imgFullPath);

//if you want you can download image in your desired extension 

WebClient wc = new WebClient();

wc.DownloadFile(imgFullPath, Server.MapPath("~/images/temp/") + FileName);

//download the file in images location

FileStream fs = new FileStream(Server.MapPath("~/images/temp/" + FileName), FileMode.Open, FileAccess.Read, FileShare.Read);

//get the image in file stream

System.Drawing.Image nwImage = System.Drawing.Image.FromStream(fs);

//Now using this nwImage you can resize the image 

nwImage.Save(Server.MapPath("~/images/") + "your_own_image_name.extension");

File.Delete(Server.MapPath("~/images/temp/" + FileName));

//if no needed the original image delete the file using this

Tages: Downloading images from external url, resizing root folder images, downloading images from path,

Allow only numbers in textbox using javascript

Use the following code:

function AllowNumsOnly(evt)
{
    var charCode = (evt.which) ? evt.which : event.keyCode
    if (charCode > 31 && (charCode < 48 || charCode > 57))
        return false;
 else
        return true;
}

<asp:TextBox ID="txt_Qty" runat="server" onkeypress="return AllowNumsOnly(event);"></asp:TextBox>

Tag: Allow only numbers in textbox using javascript,allow numbers only onkeypress