Unable to open SharePoint site on host machine

Few weeks back, i created one SharePoint site means a web application using Central Admin. One thing which i did different from usual is Host hearder entry. After creating site i tried to open it using host header or say fully qualified name but i couldn't open it on my local machine but though i can open it from other machines.

Also one more problem i was facing at the time of creating new SharPoint project from Visual Studio 2010. Error like below

Cannot connect to SharePoint Site: http://<sitename>/. Make sure that this valid URL and the SharePoint site is running on the local computer. If you moved this project to a new computer or if the URL of the SharePoint site has changed since you created the project, update the Site URL Property of the project.

One of my friend gave me this useful link that i am sharing with you

http://support.microsoft.com/kb/896861

To create/open project in Visual Studio try to use host header URL not machine name or localhost.

Webpart Preview Page: Event handler not firing in webpart

Today i faced realy strange issue with button event handler in webpart, my webpart created from SharePoint webpart class. This is code

public class MyFirstWebPart : Microsoft.SharePoint.WebPartPages.WebPart
{
 Label userName = new Label();
 Button button;

 protected override void CreateChildControls()
 {
  button = new Button();
  userName.Text = "Sandip";
  button.Text = "Change this text";
  button.Click+=new EventHandler(button _Click);
  this.Controls.Add(userName);
  this.Controls.Add(button);
 }

 protected void button _Click(object sender, EventArgs e)
 {
  userName.Text = "Sandip Patil";
 }
}

I wired up event handler in CreateChildControls method so that was not an issue. Issue is with testing webpart on the page. I was testing webpart on webpart preview page. You can find webpart preview page whenever you select any webpart from webpart gallery page. After 1 hour of wasting time, i created one webpart page and put that webpart inside webpart zone. Thereafter i could see that event handler was firing. Means problem was not with the code but with testing scenario.

Be careful when you test webpart on Webpart Preview page.

Good Bye, Have a nice time...!

SharePoint 2010: Choice column not supported in lookup

One of the issue or we can say a bug that i found in new SharePoint 2010 version and it is confirmed from Microsoft team.

Issue is like this,

If you try to create a lookup column and select list from which you are setting lookup column, you will not get choice field columns in primary as well as secondary fields. For testing purpose take Task list and check the fields in dropdown as well as checkbox

ID
Title
Modified
Created
Version
Title (linked to item)
% Complete
Start Date
Due Date

You never get Priority and Status columns

On one of the Microsoft blog, i found a post where they say it is supporting but it's not true, Here below it is

Create list relationships by using lookup and unique columns

get confirmation from this post

Restrictions on additional columns available for addition with Lookup column?

Hope in upcoming hotfix this bug will be solved...!