Monday, October 25, 2010

Error: File not found when address the site with full computer name

Today, I have an interesting thing while I am working on SharePoint. My co-worker gets an error when he try to access the SharePoint site by IP address. Of course, he can fix this issue, that means it's so easy, at least with him. However, it still shows error if I address to his site with full computer name. You know, when your computer join to the domain, then your computer's fullname is your computer name dot domain name.

In this example, my computer name is htserver2k8x64 (or vm_moss2007x64), when I join to the domain with named "" then my computer's fullname is "". The problem is if I browse my site from http://vm_moss2007x64 or http://htserver2k8x64 (for windows server 2008, 64 bits), everything works fine. After that I changed to, with the team site without my web part that everything is fine again. But if in the team site included my web part already, I got an error like this:

Then, I removed my web part out web part zone, then added my web part again, I got another error:

Yeah! for now I just did the following SharePoint instruction. In this case, I must add new alternating access mapping in the Central Admin.
Go to Options -> Alternating Access Mapping -> Add internal URL for Port 80 ( I am working on Port 80)

Then you will see 2 internal url can access to the same web application:

For now, you can access the site by http://vm_moss2007x64 or without any error.

For another solutions, you can modify the Host header of your site in IIS:

This solutions is also resolved this issue.

Error: The security validation for this page is invalid. Click Back in your Web browser, refresh the page, and try your operation again

Today, I try to create a hidden list and then get its schema. My purpose is to know how many columns in each of list type. But I did not logged in the site by owner, just used  Contribute account to do creating. Unfornately, Contribute account does not have the right to create a new list, only can create a new view or new item in the list. So, I get the error if I try to create:

[COMException (0x8102006d): The security validation for this page is invalid. Click Back in your Web browser, refresh the page, and try your operation again.]

Now, take a look at my code:

After search on the internet, I read the blog from: Tushar Parikh. He recommended to re-config Security of the Web Application:

Central Administration -> Application Management -> Web Application General Settings ->Select web application

In Web Page Security Validation , change security validation is off. 

I tried the following his instruction and it worked for me, but the another problem is just worked for PostBack page. But in recent, my page is running under ajaxified. So, I must turn the security validation on. But I found another blog and I resolved the problem.

Here is the blog:

My code was changed:

AllowUnsafeUpdates property is very useful if you want to update the property bag of Web or Site object. It takes me 1 hour to research and fix the problem... Thanks for all

Monday, October 18, 2010

How is the Attachment column worked in CAML query?

It took me a few minutes to fix this issue.

SharePoint did not allow you filter the value of attachment column with another value except for "Yes" or "No". But when you bind data into a gridview with filtering option is ON, user still can type or filter this column with another value, for example: Greater than "5" or Less Than "OK"

1) Greater Than "5" Our CAML query is

Result: No record is displayed. That would be nice. But when you change Less Than "5", it would be:

You know, with Attachments column, if the item has an attachment, its value is 1 and otherwise is 0. So, the CAML query is less than "5" matched with items which have both an attachment and none. That's very funny.

2) Less Than "OK"

I really dont know how the SharePoint parsed this value, but it will show data with items which has no attachment.

Conclusion: When you want to return "No record" if user filters with the value different from "Yes" / "No" or "1" / "0" the value in CAML query must be "." (dot) 

Yeap. It worked for me now.

Wednesday, October 13, 2010

Best Practices for Writing JavaScript in SharePoint 2010

JavaScript is an important part of building any interactive website, and SharePoint is certainly no exception. With SharePoint, JavaScript is often used to execute code on the client and it is usually designed to affect only one specific Web Part, as opposed to affecting an entire page. So, in a typical SharePoint page where there are many Web Parts in a zone, it's very easy to mistakenly write Java code that affects another Web Part.  The potential for such conflicts is unavoidable, so this article details some best practices for working on JavaScript and SharePoint Web Parts in SharePoint 2010.

Full article here

Tuesday, October 12, 2010

Error javascript if RadGrid binds data with Ajaxified and filtering is ON (SharePoint 2010)


I have an UI to allow user to select a list and bind the data into grdiview. The button create will run under Ajax.

If you are using RadGrid with ajaxified in the package Telerik.Web.UI.Dll (2010.1.415.35), but did not bind the data into grid until the configuration finished, you will get the error like this: (this error just happens with filtering function is ON).

Note: Just happen on SharePoint 2010 (both of SharePoint Foundation and Office SharePoint Server)

In fact, you still see the data on gridview but some functions on grid did not work correctl such as the filtering menu is stopped working.


After binding data, RadGrid added a lot of javascript resources in page need to run all functions. However, these resources will not be added after binding data under ajaxified.


When the setting page is showing, we bind the empty data (because the grid view does not show on the page, so we can bind with any data), here I am using a simple data with one column)

//This code should be put in OnLoad() method
//and just run for the first time
//when we click on Create button, the radGrid will bind from table after collecting data
//and these code will bypassed.

if (!Page.IsPostBack)
   DataTable tb = new DataTable();
   GridDataBound col = new GridDataBound()
   col.HeaderText = "Col1";
   col.DataField = "Col1";
   col.UniqueCol = "Col1";

   radGrid.DataSource = tb;

//Events for create button
 protected void Create_Click(object sender, EventArgs e)
   //Collecting data
   radGrid.DataSource = tb;

The purpose to bind data at the first time is to generate the JavaScript resources by RadGrid. The next step is running under Ajax, so these resource will not update after that. But we can use the filtering function correctly.