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Tuesday, March 17, 2009

Find RSS Url for a List or Document Library using Code

RSS Reader webpart which would take the RSS URL of list to render its feeds. Very much same like the out of the box webpart with the exception that it was AJAX enabled. I would post the details of that part on the blog when I am finished.
I thought it would be just a matter of accessing the RssUrl property of SPList object, but to my surprise it was not to be. There is no property such property in the API, so I decided to write my own function for it.
Let’s analyze the RSS URL of a list or a library. Whenever the user clicks on View RSS feed on a library, here is how SharePoint constructs
the URL:

http://server/site/_layouts/listfeed.aspx?List=%7B14206B18%2DF68F%2D479B%2DBC84%2D15EE48D19D7D%7D


Listfeed.aspx is the inbuilt RSS viewer of sharepoint which accepts a parameter which is the GUID of the list. %2D tokens refer to ‘-‘characters which exist inside the GUID. Considering all this, it’s easy to write a function which will return the RSS URL. Here is the code for the same:
private string CreateRssUrl(string rawurl)
{
try
{
Uri url = new Uri(rawurl, UriKind.Absolute);
if (url.GetLeftPart(UriPartial.Path).Contains(“_layouts/listfeed.aspx”))
{
return rawurl;
}
else
{
string rssurl;
using (SPWeb web = new SPSite(rawurl).OpenWeb())
{
SPList list = web.GetListFromUrl(rawurl);
rssurl = web.Url + "/_layouts/listfeed.aspx?list=" + list.ID;
return rssurl;
}
}
}
catch (UriFormatException e)
{
return string.Empty;
}
}

Sharepoint Workflow Custom Activity for Active Directory & Deployment on Moss 2007

Creating your own Custom Workflow Activities as Components using Windows Workflow Foundation (Framework 3.0) and deployment on SharePoint 2007.Required Installation Setup



  • Visual Studio .Net 2005

  • Framework 3.0

  • Windows Workflow Foundation Extension for Workflow Activity Template

  • SharePoint Portal 2007,SharePoint Services and Microsoft Office SharePoint Designer

The steps to add a simple activity to the SharePoint Designer interface include:
Create a custom activity assembly.
Sign and deploy the activity assembly to the GAC.
Configure SharePoint to recognize the custom activity.
Create a .ACTIONS file to be used by SharePoint Designer.
Step 1: Create a custom activity assembly
Open Visual Studio 2005 solution.
Select New Project and Workflow Activity Library Template which is a project for creating a library of activities which can later be reused as building blocks in workflows.
Code Block
using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Collections;
using System.Drawing;
using System.Workflow.ComponentModel.Compiler;
using System.Workflow.ComponentModel.Serialization;
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Design;
using System.Workflow.Runtime;
using System.Workflow.Activities;
using System.Workflow.Activities.Rules;
using System.Collections.Generic;
using System.Text;
namespace ActivityLibrary1
{
public partial class ADComponent : System.Workflow.ComponentModel.Activity
{
private string cn;
public ADComponent()
{
InitializeComponent();
}
public static DependencyProperty DirectoryUriProperty = DependencyProperty. Register"DirectoryUri",typeofSystem.String),typeo(ActivityLibrary1.ADComponent)); [DescriptionAttribute("Please specify the URI of the directory. Either an AD Server or an XML File.")]
[DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Visible)]
[ValidationOption(ValidationOption.Required)]
[BrowsableAttribute(true)]
[Category("Directory")]
public string DirectoryUri
{
get
{
return ((String)(base.GetValue(ADComponent.DirectoryUriProperty)));
}
set
{
base.SetValue(ADComponent.DirectoryUriProperty, value);
}
}
public static DependencyProperty QueryProperty = DependencyProperty.Register ("Query", typeof(System.String), typeof(ActivityLibrary1.ADComponent));
[DescriptionAttribute("Please specify the Username of the user to retrieve.")]
[DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Visible)]
[ValidationOption(ValidationOption.Optional)]
[BrowsableAttribute(true)]
[Category("Query")]
public string Query
{
get
{
return ((String)(base.GetValue(ADComponent.QueryProperty)));
}
set
{
base.SetValue(ADComponent.QueryProperty, value);
}
}
public static DependencyProperty RetrievedUserDataProperty = Dependency Property.Register ("RetrievedUserData", typeof(System.String), typeof (ActivityLibrary1.ADComponent));
[DescriptionAttribute("Please specify the Username of the user to retrieve.")]
[DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Visible)]
[ValidationOption(ValidationOption.Optional)]
[BrowsableAttribute(true)]
[Category("RetrievedUserData")]
public string RetrievedUserData
{
get
{
return ((String)(base.GetValue(ADComponent.RetrievedUserDataProperty)));
}
set
{
base.SetValue(ADComponent.RetrievedUserDataProperty, value);
}
}
public string CN
{
get
{
return cn;
}
set
{
cn = value;
}
}
protected override ActivityExecutionStatus Execute(ActivityExecutionContext context)
{
string a = "ActiveDirectory";
switch (a)
{
case "ActiveDirectory":
ADHelper adh = new ADHelper(this.DirectoryUri);
CN = adh.FetchUser(this.Query);
break;
}
//Set the results property
this.RetrievedUserData = CN;
return ActivityExecutionStatus.Closed;
}
}}
Code Bock For Supportive ADHelper Class
//-----------------------------------------------------------------------------//
//--------------Active Directory helper Class----(Rifaqat:2nd April 06)-------//
//-------Description: ...............................................--------//
//-------------------------------------------------------------------------//
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.DirectoryServices;
using System.Collections;
namespace ActivityLibrary1
{
internal class ADHelper
{
private string ldapPath;
DirectorySearcher search;
internal ADHelper(string ldapPath)
{
this.ldapPath = ldapPath;
search = new DirectorySearcher(new DirectoryEntry(ldapPath));
}
internal string GetUsersManager(string loginName)
{
SearchResult result;
search.Filter = String.Format("(SAMAccountName={0})", loginName);
search.PropertiesToLoad.Add("manager");
result = search.FindOne();
if (result == null)
{
return "";
}
else
{
string userPath = result.Properties["manager"][0].ToString();
System.DirectoryServices.DirectoryEntry de = new DirectoryEntry("LDAP://" + userPath);
return de.Properties["sAMAccountName"].Value.ToString();
}
}

internal string FetchUser(string Designation)
{
string _User = "";
try
{
SearchResult result;
search.Filter = String.Format("(Title={0})", Designation);
search.PropertiesToLoad.Add("cn");
result = search.FindOne();
if (result != null)
{
_User = result.Properties["cn"][0].ToString();
}
}
catch (Exception ex)
{
}
return _User;
}
internal string FetchUseronDesg(string loginName)
{
string _User = "";
try
{
SearchResult result;
search.Filter = String.Format("(SAMAccountName={0})", loginName);
search.PropertiesToLoad.Add("title");
search.PropertiesToLoad.Add("cn");
result = search.FindOne();
if (result != null)
{
_User = result.Properties["title"][0].ToString();
}
}
catch (Exception ex)
{
string s = ex.Message;
}
return _User;
}
}
}Your Solution Explorer will be like this:In this code the DirectoryUri and Query are passing as inputproperty and are used to specify the text that will be displayed in the Display Name of User as Output. We use a dependency property to enable the workflow to bind data to it. As with all workflow activities, the Execute method performs the action. Step 2: Sign and deploy the activity assembly to the GACStep 3: Configure SharePoint to recognize the custom activityAfter you build the custom activity assembly, sign it and copy it to the GAC. You then have to tell SharePoint to trust the assembly. This is similar to configuring a web part as a safe control, but instead of adding an entry to the section, you add an entry to the section. Edit the web.config file for your SharePoint web application and add an element as in the following example:
Goto in your Site using this URL C:\Inetpub\wwwroot\wss\VirtualDirectories\10161
Open your Config File.
You need to add your assembly in specific site port config file:
Step 4: Create a .ACTIONS file to be used by SharePoint Designer
The final step is to create the .ACTIONS file that describes the activity to SharePoint Designer. Since this is an XML file, you can create it using Visual Studio or any XML editor.
This file describes the public properties exposed by the activity and tells SharePoint Designer how to map those properties into rules that can be displayed to the user. The following code shows a custom .ACTIONS file for the custom Active Directory activity.
Goto this path for .Actions FileC:\Program Files\Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\1033\Workflow



ClassName="Microsoft.SharePoint.WorkflowActions.CollectDataTask"
Assembly="Microsoft.SharePoint.WorkflowActions, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c"
AppliesTo="all"
CreatesTask="true"
Category="Task Actions">















The Actions tag tells SharePoint Designer what to display for each action in the set. Within that, the Action tag describes the individual action. The Name attribute is what gets displayed in the designer. The ClassName and Assembly attributes are used in the generated XAML for the workflow. The interesting part is the way the RuleDesigner and Parameter tags work. The RuleDesigner tag lets you set up a sentence that gets displayed in the designer as you build up the workflow. The Sentence attribute allows you to bind to the activity properties and then substitute their values when the activity is executed.
You can declare as many actions as you want in the file. A good rule of thumb is to use a separate .ACTIONS file for each logical group of custom activities you wish to deploy. Once you've created your .ACTIONS file and copied it to the server, you can refresh the site in SharePoint Designer and your custom activity will appear in the workflow designer as shown below.


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