Category » ASP.NET « @ 肖恩D++

Disable Browser Cache for Specific Page in ASP.NET MVC 3

Posted on May 21st, 2015 Sean Add comments

Generally when you click the “Back” or “Forward” button on the browser, the page won’t refresh unless you tell the browser not saving the cache for it. To implement “Disable Browser Cache” for specific page in ASP.NET MVC 3, just simply use the “OutputCacheAttribute” from MVC 3 framework:

C#

[OutputCache(NoStore = true, Duration = 0)] public ActionResult MyAction() { //code here }

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[OutputCache(NoStore = true, Duration = 0)]
public ActionResult MyAction()
{
//code here
}

ASP.NET

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jQuery $.ajax()/$.get() function always get same value for IE

Posted on June 19th, 2014 Sean Add comments

When I was trying to use jQuery $.ajax() or $.get() function retrieve some random value from the server side, it’s working fine on firefox or chrome, but not IE. The server side code like below (written in ASP.NET MVC):

public class HomeController : Controller
{
    public ActionResult GetRandomCount()
    {
        return Json(new Random().Next(1, 100), JsonRequestBehavior.AllowGet);
    } 
}

public class HomeController : Controller

{

public ActionResult GetRandomCount()

{

return Json(new Random().Next(1, 100), JsonRequestBehavior.AllowGet);

}

The client side code:

<a href="javascript:void(0)" onclick="CheckCount()">Check Count</a>
<script>
function CheckCount(){
    $.get('/Home/GetRandomCount', function (data) {
        alert(data);
    });
}
</script>

<a href="javascript:void(0)" onclick="CheckCount()">Check Count</a>

function CheckCount(){

$.get('/Home/GetRandomCount', function (data) {

alert(data);

});

}

</script>

I’m supposed to get a random number every time I click the link, but in IE, always same one returned. Regarding Craic Computing’s Blog, that’s because IE will cache the value first returned, and trade rest requests as identical by default, so it won’t update the value since the request URL never change.
To fix this issue, just disable cache in the jQuery function as following:

function CheckCount(){
    $.ajaxSetup ({  
         cache: false  
    });
    $.get('/Home/GetRandomCount', function (data) {
        alert(data);
    });
}

function CheckCount(){

$.ajaxSetup ({

cache: false

});

$.get('/Home/GetRandomCount', function (data) {

alert(data);

});

}

ASP.NET, HTML/CSS

(No Ratings Yet)

Mailbox unavailable for IIS 6 smtp service

Posted on January 18th, 2014 Sean Add comments

After created a smtp virtual server and enable the smtp service, if the web application still got error such “Mailbox unavailable. The server response was: 5.7.1 Unable to relay for name@email.com”, need to do following:
1. Open “IIS 6 Manager”
2. Under local computer name, find SMTP virtual server, and open properties for it
3. On “Access” tab, click “Relay” on “Relay restrictions” section
4. Choose “Only the list below”, then add loopback ip “127.0.0.1” and server ip to the list
5. Restart smtp service
ASP.NET, Networking, Windows

(No Ratings Yet)

Predicates in Lambda Expression for Entity Framework Code First

Posted on July 24th, 2013 Sean 1 comment

If I have 2 entities of “People” and “Car”, and “1” People can have “Many” Car, my code first class could be like below:

public class People
{
	[key]
	public int ID { get; set; }
	public string Name { get; set; }
	
	public virtual ICollection<Car> Cars { get; set; }
}

public class Car
{
	[key]
	public string VIN { get; set; }
	public string Maker { get; set; }
	public int OwnerID { get; set; }
	
	[ForeignKey("OwnerID")]
	public virtual People Owner { get; set; }
}

public class People

{

[key]

public int ID { get; set; }

public string Name { get; set; }

public virtual ICollection<Car> Cars { get; set; }

}

public class Car

{

[key]

public string VIN { get; set; }

public string Maker { get; set; }

public int OwnerID { get; set; }

[ForeignKey("OwnerID")]

public virtual People Owner { get; set; }

}

Read the rest of this entry »

ASP.NET

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Change Visual Studio Workspaces for Team Foundation After Client Name Changed

Posted on February 2nd, 2013 Sean Add comments

As part of source control in visual studio team foundation, ever user has their own workspace tie to the computer name of client and username on Team Foundation Server. If any one needs to change the computer name on client computer or the username, should use “tf.exe” command from the visual studio like following:
1. Make sure Team Explorer has been installed. (most likely it’s there if VS2010 installed)
2. Open a command line window and go to folder “C:\Program Files\Microsoft Visual Studio 10.0\Common7\IDE” (or “C:\Program Files(x86)\Microsoft Visual Studio 10.0\Common7\IDE” if on Windows 7)
3. Run the command
  
  Shell
  
  tf workspaces /updateComputerName:Old_Computer_Name /s:http://Tfs_server_URL
  
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  tf workspaces /updateComputerName:Old_Computer_Name /s:http://Tfs_server_URL
ASP.NET Visual Studio

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Disable Browser Cache for Specific Page in ASP.NET MVC 3

jQuery $.ajax()/$.get() function always get same value for IE

Mailbox unavailable for IIS 6 smtp service

Predicates in Lambda Expression for Entity Framework Code First

Change Visual Studio Workspaces for Team Foundation After Client Name Changed

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