Url Properties of SPSite and SPWeb

There are some properties for SPSite and SPWeb class using which we can get the URL values for the sites and webs. The two most used of these properties are - 'ServerRelativeUrl' and 'Url'

As a developer we use the values of the properties for writing some logic for satifying the business needs. Whenever I used to write a OM code to use these properties, the first question which flashes in my mind - "What values are returned by these properties?". I immediately create a cosole application, and check the values returned by these properties and contiue with the actual work. I have seen many other developers doing this. So, for a quick reference I prepared the below table which has the url values returned by these properties.

Some poeple may find this easy, but some (like me ;)) get confused when the sites have managed paths. These properties return the managed path if the site has one. Here goes the list

SCENARIO 1: A Site Collection (SPSite) without any managed path.

URL : 'http://rams'
Property	Value
SPSite.ServerRelativeUrl	/
SPSite.Url	http://rams
SPWeb.ServerRelativeUrl	/
SPWeb.Url	http://rams
Url - http://rams/about ('about' is a sub site)
SPSite.ServerRelativeUrl	/
SPSite.Url	http://rams
SPWeb.ServerRelativeUrl	/about
SPWeb.Url	http://rams/about

This looks pretty simple. We get confused when sites are created using managed paths. Below are the samples values for site created with managed paths

SCENARIO 2: A Site Collection with a managed path (of type Explict inclusion). For the below URL '/my' is the managed path

URL : 'http://rams/my'
Property	Value
SPSite.ServerRelativeUrl	/my
SPSite.Url	http://rams/my
SPWeb.ServerRelativeUrl	/my
SPWeb.Url	http://rams/my
Url - http://rams/my/about ('about' is a sub site)
SPSite.ServerRelativeUrl	/my
SPSite.Url	http://rams/my
SPWeb.ServerRelativeUrl	/my/about
SPWeb.Url	http://rams/my/about

SCENARIO 3: A Site Collection with a managed path (of type Wilcard inclusion). For the below URL '/sites' is the managed path, and a site collection is created at '/blog'

URL : 'http://rams/sites/blog'
Property	Value
SPSite.ServerRelativeUrl	/sites/blog
SPSite.Url	http://rams/sites/blog
SPWeb.ServerRelativeUrl	/sites/blog
SPWeb.Url	http://rams/sites/blog
Url - http://rams/sites/blog/about ('about' is a sub site)
SPSite.ServerRelativeUrl	/sites/blog
SPSite.Url	http://rams/sites/blog
SPWeb.ServerRelativeUrl	/sites/blog/about
SPWeb.Url	http://rams/sites/blog/about

How to make page active after download using Response in C# in sharepoint webpart/user control

I usually came across these kind of statements 'Page hangs after downloading', 'post back not happening after file download'

yes, its true, when we are trying to download a file from C# and with the logic of Response, the last statement of response will be response.end.

once the compiler hits this response.end, the page losts its response and hence, any button or post back controls wont work. It looks like the page and controls are numb. 

Think I have a button on the page that sends a file and after clicking the button, the rest of the form was unresponsive. Turns out it is a sharepoint thing that sets the variable _spFormOnSubmitCalled to true to prevent any further submits. When we send a file this doesn't refresh the page so we need to manually set this variable back to false.

on your button in the webpart set the OnClientClick to a javascript function like shown below.

 <asp:Button ID="generateExcel" runat="server" Text="Export Excel" 
OnClick="generateExcel_Click" CssClass="rptSubmitButton"
OnClientClick="javascript:setFormSubmitToFalse()" />

Then in javascript function write as below.

function setFormSubmitToFalse() {
    setTimeout(function () { _spFormOnSubmitCalled = false; }, 3000);
    return true;
}

The 3 second pause I found was necessary because otherwise I was setting the variable before sharepoint set it. This way I let sharepoint set it normally then I set it back to false right after.