jayant bhawal - Developer IT

Error occurred in deployment step 'Activate Features': The field with Id {GUID} defined in feature {GUID} was found in the current site collection or in a subsite.

- by Jayant Sharma

Hi all, In SharePoint 2010, This is rare error, I got when I deploy and activate Feature using VS2010. Deployment works file but in activation process it get stuct and throws error. Error occurred in deployment step 'Activate Features': The field with Id {GUID} defined in feature {GUID} was found in the current site collection or in a subsite. When I googled I found very good solution from Sandeep Snahta Blog. http://snahta.blogspot.hk/2011/10/error-in-activate-features-from-visual.html As suggested in this blog, there is two option to overcome this error; Close VS2010 and restart again. Or Kill VSSHost4 Process either through Task Manager or Via Power Shell Command stop-process -processname vssphost4 -force Jayant Sharma

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This Task Is Currently Locked by a Running Workflow and Cannot Be Edited

- by Jayant Sharma

Problem: In SharePoint Workflow, "This task is currently locked by a running workflow and cannot be edited" is the common exception, that we face. Solution: Generally this exception occurs 1. when the number of items in the Task List gets highThis exception says that the workflow is not able to deliver the all the events at a given time and so the tasks get locked. Out Of Box, the default event delivery throttle value is 15. Event delivery throttle value Specifies the number of workflows that can be processed at the same time across all front-end Web serverslook at following link.(http://blogs.msdn.com/b/vincent_runge/archive/2008/09/16/about-the-workflow-eventdelivery-throttle-parameter.aspx)If the value returned by query is superior to the throttle (15 by default), any new workflow event will not be processed immediately. so we need to change it by stsadm command like...stsadm -o setproperty -pn workflow-eventdelivery-throttle -pv "20"(http://technet.microsoft.com/en-us/library/cc287939(office.12).aspx) 2. When we modify a Workflow Task from Custom TaskEdit Page. when we try to modify the workflow task from outside workflow default Page, like custom workflow taskedit page. then is exception occurs.suppose we have custom task edit page with dropdown and values are submitted/ Progress/ completed etc and we want to complete task from here. it will throw exception on SPWorkflowTask.AlterTask method, which changes the TaskStatus.When I debug, to find the root cause I actully found that the workflow is not locked. The InternalState flag of the workflow does not include the Locked flag bits(http://msdn.microsoft.com/en-us/library/dd928318(v=office.12).aspx) When I found this link http://geek.hubkey.com/2007/09/locked-workflow.htmlIt is exactly what I wanted. It says that "when the WorkflowVersion of the task list item is not equal to 1" then the error occurs. The solution that is propsed here works fantastically if ((int)task[SPBuiltInFieldId.WorkflowVersion] != 1){ SPList parentList = task.ParentList.ParentWeb.Lists[new Guid(task[SPBuiltInFieldId.WorkflowListId].ToString())]; SPListItem parentItem = parentList.Items.GetItemById((int)task[SPBuiltInFieldId.WorkflowItemId]); SPWorkflow workflow = parentItem.Workflows[new Guid(task[SPBuiltInFieldId.WorkflowInstanceID].ToString())]; if (!workflow.IsLocked) { task[SPBuiltInFieldId.WorkflowVersion] = 1; task.SystemUpdate(); break; }} It will reset the workflow version to 1 again.Conclusion: This Exception is completely confusing. So, we need to find at first whether our workflow is really locked or not. If it is really locked then use 1st method. If not, then check the workflow version and set it to 1 again.Jayant Sharma

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How to change the Target URL of EditForm.aspx, DispForm.aspx and NewForm.aspx

- by Jayant Sharma

Hi All, To changing the URL of ListForms we have very limited options. On Inernet if you search you will lots of article about Customization of List Forms using SharePoint Desinger, but the disadvantage of SharePoint Desinger is, you cannot create wsp of the customization means what ever changes you have done in UAT environment you need to repeat the same at Production. This is the main reason I donot like SharePoint Desinger more. I always prefer to create WSP file and Deployment of WSP file will do all of my work. Now, If you want to change the ListForm URL using Visual Studio, either you have create new List Defintion or Create New Content Type. I found some very good article and want to share.. http://www.codeproject.com/Articles/223431/Custom-SharePoint-List-Forms http://community.bamboosolutions.com/blogs/sharepoint-2010/archive/2011/05/12/sharepoint-2010-cookbook-how-to-create-a-customized-list-edit-form-for-development-in-visual-studio-2010.aspx Whenever you create, either List Defintion or Content type and specify the URL for List Forms it will automatically add ListID and ItemID (No ItemID in case of NewForm.aspx) in the URL as Querystring, so if you want to redirect it or do some logic you can, as you got the ItemID as well as ListID.

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SharePoint 2010 Data Retrival Techinques

- by Jayant Sharma

In SharePoint, we have two options to perform CRUD operation.1. using server side code2. using client side codeusing server side code, we have 1. CAML2. LINQusing client side code, we have 1. Client Object Model 1.1. Managed Client Object Model 1.2. Silverlight Client Object Model 1.3. ECMA Client Object Model2. SharePoint Web Services3. ADO Data Service (based on REST Web Services)4. Using RPC Call (owssvr.dll)Which and when these options are used depend upon requirements. Every options are certain advantages and disadvantages. So, before start development of any new sharepoint project, it is important to understand the limitations of different methods.Server Object Model is used when our application is host on the same server on which sharepoint is installed. while Client Side code is used to access sharepoint from client system. In SharePoint 2010 specially Client Object Model (COM) are introduced to perform the sharepoint operations from client system. Advantage of CAML: - It is fast. - Can be use it from all kind of technology like Silverlight, or Jquery - You can use U2U CAML Query builder to generate CAML Query.Disadvantage Of CAML: - Error Prone, as we can detect the error only at runtimeAdvantage of LINQ: - Object Oriented technique (Object Relation Model) - LINQ to SharePoint provider are working with Strongly Type List Item Objects, So intellisence are present at runtime - No need of knowledge of CAML - Less Error Prone as it as it uses C# syntex. - You can compare two Fields of SharePoint ListDisadvantage Of LINQ: - List Attachment is not supported in SPMetal Tool - Created By, Created, Modified and Modified By Fields are not created by SPMetal Tool. - Custom fields are not created by SPMetal Tools - External Lists are not supported - Though at backend LINQ genenates CAML Query so it is slower than directly using CAML in Code. Advantage of Client Object Model - Used to access sharepoint from client system - No WebServer is required at Client End - Can use Silverlight and JavaScripts to make better and fast User experienceDisadvantage of Client Object Model - You cannot use RunwithEleveatedPrivilege - Cross Site Collection query are not possible - Lesser API's are availableADO.Net Data Services: - Only List based operations are possible, other type of operations are not possible.SharePoint Web Services and RPC Call: - Previously it was used in SharePoint 2007 but after the introduction of Client Object Model, Microsoft recommends not to use Web Services to fetch data from SharePoint. In SharePoint 2010 it is avaliable only for backward compatibility.Ref: http://msdn.microsoft.com/en-us/library/ee539764Jayant Sharma

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How to Change System Application Pages (Like AccessDenied.aspx, Signout.aspx etc)

- by Jayant Sharma

An advantage of SharePoint 2010 over SharePoint 2007 is, we can programatically change the URL of System Application Pages. For Example, It was not very easy to change the URL of AccessDenied.aspx page in SharePoint 2007 but in SharePoint 2010 we can easily change the URL with just few lines of code. For this purpose we have two methods available: GetMappedPage UpdateMappedPage: returns true if the custom application page is successfully mapped; otherwise, false. You can override following pages. Member name Description None AccessDenied Specifies AccessDenied.aspx. Confirmation Specifies Confirmation.aspx. Error Specifies Error.aspx. Login Specifies Login.aspx. RequestAccess Specifies ReqAcc.aspx. Signout Specifies SignOut.aspx. WebDeleted Specifies WebDeleted.aspx. ( http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spwebapplication.spcustompage.aspx ) So now Its time to implementation, using (SPSite site = new SPSite(http://testserver01)) { //Get a reference to the web application. SPWebApplication webApp = site.WebApplication; webApp.UpdateMappedPage(SPWebApplication.SPCustomPage.AccessDenied, "/_layouts/customPages/CustomAccessDenied.aspx"); webApp.Update(); } Similarly, you can use SPCustomPage.Confirmation, SPCustomPage.Error, SPCustomPage.Login, SPCustomPage.RequestAccess, SPCustomPage.Signout and SPCustomPage.WebDeleted to override these pages. To reset the mapping, set the Target value to Null like webApp.UpdateMappedPage(SPWebApplication.SPCustomPage.AccessDenied, null);webApp.Update();One restricted to location in the /_layouts folder. When updating the mapped page, the URL has to start with “/_layouts/”. Ref: http://msdn.microsoft.com/en-us/library/gg512103.aspx#bk_spcustapp http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.spwebapplication.updatemappedpage.aspx

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CSS - background-size: cover; not working in Firefox

- by Jayant Bhawal

body{ background-image: url("./content/site_data/bg.jpg"); background-size: cover; background-repeat: no-repeat; font-family: 'Lobster', cursive; } Check: http://demo.jayantbhawal.in on firefox browsers, NOT in widescreen mode. The code works on Chrome(Android + PC) and even the stock Android browser, but NOT Firefox(Android + PC). Is there any good alternative to it? Why is it not working anyways? Googled this issue a lot of times, but no one else seems to have this problem. Is it just me? In any case, how do I fix it? There are quite some questions on SO about it too, but none of them provide a legitimate solution, so can someone just tell me if they have background-size: cover; issues on firefox too? So basically tell me 3 things: 1. Why is it happening? 2. What is a good alternative to it? 3. Is this happening to you too? On Firefox browsers of course. Chrome Version 35.0.1916.114 m Firefox Version 29.0.1 Note: I may already be trying to fix it so at times you may see a totally weird page. Wait a bit and reload.

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Create graphics similar to Mobigames' Edge gameplay

- by Jayant

How can I create and animate a cube and make graphics similar to Mobigames' Edge? Any sample code would be greatly appreciated.

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Java : Using parent class method to access child class variable

- by Jayant

I have the following scenario : public class A { private int x = 5; public void print() { System.out.println(x); } } public class B extends A { private int x = 10; /*public void print() { System.out.println(x); }*/ public static void main(String[] args) { B b = new B(); b.print(); } } On executing the code, the output is : 5. How to access the child class(B's) variable(x) via the parent class method? Could this be done without overriding the print() method (i.e. uncommenting it in B)? [This is important because on overriding we will have to rewrite the whole code for the print() method again]

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Learn How to Use Oracle’s Spatial and BI Tools for Location-aware Predictive Analytics

- by Mandy Ho

November 29, 2-3pm EST Are you a OBIEE (Oracle Business Intelligence Enterprise Edition) user? Have Location data you'd like to incorporate into your analysis as well? This is a great webinar for you! Join us, as Oracle experts from both teams show how to perform perdictive analytics, network analytics and spatial analysis, combined together, in real world scenarios. We will include demos evaluating airline on-time performance and retail establishment performance. Learn how to: - Gain better business insights and improve ROI with Oracle Spatial and Graph, Oracle Advanced Analytics, and Oracle Business Intelligence Enterprise Edition (OBIEE). - Streamline and remove the complexity of building applications with OBIEE’s built-in location and analytics features. - Create the statistical model, build interactive reports and dashboards including location analysis and map visualization, and incorporate network analytics for geomarketing and site scoring. - Perform location analysis and processing such as proximity, containment, geocoding, aggregation of geographic regions, and more. Speakers include Jayant Sharma, Director, Product Management, Oracle Spatial and Mapping Technologies; Jean Ihm, Principal Product Manager, Oracle Spatial and Mapping Technologies; and Abhinav Agarwal, OBIEE Product Management. Who should attend This webinar is appropriate for CIOs, business and technical managers, developers, and analysts involved in design and management of analytic applications and solutions where spatial analysis can add insight and value to business processes. Click here, or the link below to sign up today! https://www2.gotomeeting.com/register/764677554

Developer IT