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Posts tagged with: ASP .net

DateTime not parsing MM/dd/yyyy correctly on Windows 10 on ASP .Net MVC

Have you experienced coding and all of a sudden when on windows 10 you experienced that MM/dd/yyyy is not a valid date? This is because of the culture that is default implemented on your device, in this case on my device with Windows 10 Pro. To cause of this is the machine is by default is using dd/MM/yyyy and in this case apps that we are developing is having this kind of issue.

Thank fully the fastest way to fix is via the web.config with the following code:

<system.web>

<globalization culture=”en-US” uiCulture=”en-US”/>

 

And then run again your application and it will now accept your MM/dd/yyyy.


Generate Random String on ASP .Net

Is so easy to create a random string on ASP .Net with/without as of ASP .Net 2 with just the following code:

 

int length = 50;
int numberOfNonAlphanumericCharacters = 0

srtring random = Membership.GeneratePassword(length , numberOfNonAlphanumericCharacters);

God Bless!
Thanks,
Thomie


Replace words on MS Word using C#

Hi,

Recently I was instructed to create an application that will be able to replace an array of words and replace them with an array of corresponding words on an MS Word document. With this I’ve searched the following:

Prerequisites

  1. Visual Stduio
  2. Install the nuget package DocX
  3. Administrative access on the context the application is running

Code

Dictionary<string, string> lReplacements = new Dictionary<string, string>();
string newFullPath = @”c:\sample.docx”;

using (DocX document = DocX.Load(newFullPath))
{

//for loop is better than foreach
foreach (var item in lReplacements)
{

document.ReplaceText(item.Key, item.Value);

}
document.Save();

}

Hope it helped you as it helped me with this simple snippet.

God Bless!
Thanks,
Thomie


ELMAH – Error Logging Modules and Handlers

What is ELMAH?

  • ELMAH (Error Logging Modules and Handlers) is an application-wide error logging facility that is completely pluggable. It can be dynamically added to a running ASP.NET web application, or even all ASP.NET web applications on a machine, without any need for re-compilation or re-deployment.
  • Once ELMAH has been dropped into a running web application and configured appropriately, you get the following facilities without changing a single line of your code:
    • Logging of nearly all unhandled exceptions.
    • A web page to remotely view the entire log of recoded exceptions.
    • A web page to remotely view the full details of any one logged exception, including colored stack traces.
    • In many cases, you can review the original yellow screen of death that ASP.NET generated for a given exception, even with customErrors mode turned off.
    • An e-mail notification of each error at the time it occurs.
    • An RSS feed of the last 15 errors from the log.

How to Install ELMAH on your MVC Project?

  • Open Nuget Package Manager on the MVC Project
  • Search for ELMAH and Install it.
  • Then configure it.

ELMAH Configuration

  • It will already add some configuration under your web.config but we need to include some configuration so that it will point to a database.
  • <connectionStrings>

  <add name=”elmahConnectionString” connectionString=”Data Source=Server;Initial Catalog=ELMAH_DEV;uid=user;pwd=user;Pooling=true;Min Pool Size=0;Max Pool Size=999;” providerName=”System.Data.SqlClient” />

</connectionStrings>

  • <elmah>

    <!–

See http://code.google.com/p/elmah/wiki/SecuringErrorLogPages for

more information on remote access and securing ELMAH.

–>

<security allowRemoteAccess=”true” />

<errorLog type=”Elmah.SqlErrorLog, Elmah” applicationName=”NameOfApplication_DEV” connectionStringName=”elmahConnectionString” />

</elmah>

  • We also need to remove some sections that we don’t need specially the section below that automatically create a page for the logs.
  • <location path=”elmah.axd” inheritInChildApplications=”false”>…</location>

Logging

  • All uncatched exception will automatically be recorded.
  • All exception handling will NOT be recorded automatically. It needs to be manually logged by including the Elmah.ErrorSignal.FromCurrentContext().Raise(ex);

try{
throw new Exception(“Some Exception”);
}catch(Exception ex){

Elmah.ErrorSignal.FromCurrentContext().Raise(ex);
}

 



Creating a file to Download dynamically in an https / SSL connection

Hi there, 

Here is a tip when you are programming something that you want your file’s path to be hidden. It’s specially when its under a secure connection or https or SSL connection.

  1. Remember the mime type ea. image/jpg
  2. Remember the file name ea. image.jpg
  3. Remember not to put expiration and no-cache on your header
  4. Remember to open it on another tab or window as much as possible
  5. When you are debugging you can remove the headers so the file won’t be downloaded

Hope this tips can help you specially #3 because your download will fail on lower version of IE.

Thanks,


A potentially dangerous Request.Form value was detected from the client

Have you ever experience the following error in ASP .NET?

A potentially dangerous Request.Form value was detected from the client 

Then you are one like me. Then you should now that one of the values of your elements (<inputs> or <button> or <textarea>) has html elements on it. Example is bellow:

<input type=’text’ name=’content’ value='<script language=”javascript”>alert(“Hello World!”);</script>’/>

Then you should also know that this error is persisting because the values given above might be an XSS attack. If you are sure that you want to accept this type of values on your dabatase you may explicitly remove this validation by adding this tag to your page’s masterpage or 1st line of tag.

validateRequest=”false”

If you are on ASP .NET MVC you can add this to your model, assuming that your model has the content variable.

[AllowHtml]
public string content = String.Empty;

Thanks hope it help you allot. Also if you are not familiar with XSS attacks, I will try to make an article for that so you can create your own script that is hack-able, be able to prevent it, and know what are it’s crons.

God Bless!


IIS Missing ASP .Net 4.0 Pool

Have you’ve been missing some pool in your IIS for your ASP .Net?

The this article entitle IIS Missing ASP .Net 4.0 Pool will help you.

Chances are, you need to install .NET 4 (Which will also take care of a new AppPool for you)

  1. Open your command prompt (Windows + R) and type cmd and press ENTER
    You may need to start this as an administrator if you have UAC enabled.
    To do so, locate the exe (usually you can start typing with Start Menu open), right click and select “Run as Administrator”
  2. Type cd C:\Windows\Microsoft.NET\Framework\v4.0.30319\ and press ENTER.
  3. Type aspnet_regiis.exe -ir and press ENTER again.
    • at this point you will see it begin working on installing .NET’s framework in to IIS for you
  4. Close the DOS prompt, re-open your start menu and right click Computer and select Manage
  5. Expand the left-hand side (Services and Applications) and select Internet Information Services
    • You’ll now have a new applet within the content window exclusively for IIS.
  6. Expand out your computer and locate the Application Pools node, and select it. (You should now see ASP.NET v4.0 listed)
  7. Expand out your Sites node and locate the site you want to modify (select it)
  8. To the right you’ll notice Basic Settings… just below the Edit Site text. Click this, and a new window should appear
  9. Select the .NET 4 AppPool using the Select… button and click ok.
  10. Restart the site, and you should be good-to-go.

(You can repeat steps 7-on for every site you want to apply .NET 4 on as well)

That’s it!

Thanks,
Thomie


Timezone your DateTime

Hi there!

I have been wondering today on how to make your website created on ASP .Net  perfect to all timezone so that if a user view your website on another country the date and time of your website is set to their timezone. So lets start to Timezone your DateTime!

  1. First create a Website Project on your Visual Studio
  2. Add Reference to this DateTimeW DLL
  3. On your website there should be an AJAX – Server Interaction. The AJAX will pass the timezone of the client to the Server and the server will fetch the timezone and set all your date.

For a clear way of implementing this your can download the demo below.

Demo TimezoneDatetime




jQuery Extension for ASP .Net MVC

My boss told us to search for a jQuery Extension for ASP .Net MVC to make the development easier. After minutes of searching the web I have found two extensions that you and I can use:

  1. DJME 2 which is an free and Open source
  2. Telerik Extensions for ASP .NET in this case is a paid extension

Both extensions utilizes the creation of custom helper to make jQuery development quite easier but abstracted. Abstracted because you are learning how the extensions should be use to produce jQuery but your not really coding jQuery. 

So in the end, I will still recommend using jQuery it self, doing all the hard works of creating the JavaScript file and code all the way, so you can produce the right jQuery output you have ever wanted.


ASP .Net MVC 3 – WebMail

Hi,

I have been searching the web on how to easily send email thru ASP .NET MVC 3 and finally found the right code for it, its called WebMail. Look at the code below and insert it to one of your Controller’s Action:

WebMail.SmtpServer = “smtp.gmail.com”;
WebMail.EnableSsl = true;
WebMail.SmtpPort = 25;
WebMail.UserName = “tjpublic1@gmail.com”;
WebMail.Password = “**********”;
WebMail.From = “tjpublic1@gmail.com”;
WebMail.Send(“********@******.com”, subject:”Subject”, body:”Message Here”);

Then try it on!

Its the Easiest Email on ASP .Net mvc 3 using webmail using gmail!


SQL Server Report Service

Time to remember an old friend on creating a report on ASP .Net, the Sql Server Report Service also known as SSRS. SSRS utilizes the MS SQL Server that simplifies the creation of report. The Concept is that you separate the location where your report is located so that even if your website is down you can still provide report and use it on other web programming language by putting it in an iFrame.

Upon reviewing here are the sites that made me remember:

In addition, SSRS need SQL Business Intelligence Development Studio (BIDS) in order to create reports and deploy directly these reports to the server.


ASP .Net MVC 3 File Upload

Doing File Upload in ASP .Net MVC 3 is easier than ASP .Net Web Form. On this example Only two controller and one view is needed to perform this task.

Controller

public class FileController : Controller
    {
        //
        // GET: /File/
 
        public ActionResult Index()
        {
            return View();
        }
        [HttpPost]
        public ActionResult Upload(HttpPostedFileBase f)
        {
            if (f.ContentLength > 0)
            {
                string filePath = Path.Combine(HttpContext.Server.MapPath(“\\Uploads\\”), Path.GetFileName(f.FileName));
                f.SaveAs(filePath);                
            }
            return RedirectToAction(“Index”);
        }
 
    }
 
View
@{
    ViewBag.Title = “Index”;
}
 
<h2>Index</h2>
 
@using (Html.BeginForm(“Upload”, “File”, FormMethod.Post, new { enctype = “multipart/form-data” }))
{
    @Html.ValidationSummary(true)
 
    <input type=”file” name=”f” /><br />
    <input type=”submit” value=”Submit” />
}
 
Thats it. 
 
Download the source Here

public class FileController : Controller    {        //        // GET: /File/
        public ActionResult Index()        {            return View();        }        [HttpPost]        public ActionResult Upload(HttpPostedFileBase f)        {            if (f.ContentLength > 0)            {                string filePath = Path.Combine(HttpContext.Server.MapPath(“\\Uploads\\”), Path.GetFileName(f.FileName));                f.SaveAs(filePath);                            }            return RedirectToAction(“Index”);        }
    }


The index.html, What is it?

Have you ever wonder what is an index.html?

 

An index.html, in some cases default.html, is the main page of our website. It is the default file that our browser/server look for to view our website. The file extension(.html) also varies to what programming language we are using.

  • PHP -> index.php
  • ASP -> index.asp
  • ASP.Net ->index.aspx
  • JSP -> index.jsp
  • HTML ->index.html

It can also be set on some programming language on what specific file should the browser/server look for.

 

So be reminded that if you are developing a website that you should set the main page’s file name of your website to index.