Thursday, September 30, 2010

Update the Nintex workflow to multiple lists and libraries in a SharePoint site

Special thanks to Vadim Tabakman.
 It is a special requirement. Nintex workflows are very  helpful in some scenarios to achieve things in simple and easy way. I got a requirement that I have to implement a workflow which needs to be used in many document libraries and list. As we know the SharePoint limitation, we can not apply the workflow for the content type. So, the only way we can do is adding workflow to each and every library needed. This is difficult, but I believe this is the only way we have to proceed. The big problem here is, when we have the requirement to change the workflow according to new changes then the problem starts. We have to change it in each and every library or list where workflow is deployed. This is very difficult in real time. So, we need some other way which we have to do automation. I am googling for the solution and luckily I found a wonderful solution here.

I will explain you very detail what "Vadim Tabakman" solution is.
He has created a document library and custom list which are used to add or update the custom nintex workflow in all libraries and lists.

Tuesday, September 28, 2010

Replace single quote with two quotes in XSLT

I know most of the people will not need it as very rare this requirement comes and because of it we have to waste hours and hours. In net there are plenty of articles, posts says about how to do replace in XSLT. But, most of them has some requirements like the replace() built in method needs XSLT 2.0 version, or some thing something.... But, if you need simple replace method regardless of the version you have, then you are at right place. There are lot of custom functions written on this already. But, no one of them works for the requirement I have. That is replacing the single quote with two quotes in XSLT. 

The main requirement here is, I am more of SharePoint guy, I use infopath forms for collecting data from users and save them to backend[database]. In the process of it, I have comments fields in the form. There are chances that user may enter single quotes['] in their comments. But, while saving them to the database, the single quote ['] giving problems. Everyone knows that this is the basic problem. So, I have to replace single quote with two single quotes so that the problem will go away.

Saturday, September 25, 2010

This session has exceeded the amount of allowable resources - Infopath form error

If you are working with infopath forms and your form is really big [I mean, having lot of controls and with so many actions] then you should get this error at some point. Most of the developers did not get it as it will come very rarely.

Error details:
"This session has exceeded the amount of allowable resources."

Event Viewer details:

Event Type:      Error
Event Source:    Office SharePoint Server
Event Category:  Forms Services Runtime
Event ID:        5737
Number of form actions 208, has exceeded 200, the maximum allowable value 
per request. This value is configurable and can be changed by the administrator.
So, when we see the log description, it is saying that the form actions is beyond the SharePoint default form actions allowed. SharePoint by default allows 200 form actions per postback of a form. But, here the form I have used is using more than 200. My case it is 208. So, it will not allow to save or submit the form and throw the above error.

GridView and export to excel

This is very simple to implement in ASP.NET. But, there are possibilities to get problems in exporting to excel from grid view. When you bind data to gridview and write some logic to export to excel then it will not be enough. We have to check or write some additional logic which will help us to solve the problems. Below is the explanation for all problems we may get in the complete process along with detailed solution.

You may encounter below errors when you try to implement the export to excel for gridview.
1. Control of type "GridView" must be placed inside of the form tag with runat="server"
This is very well known error to ASP.NET developers and by seeing it, we think that the control is not inside the form with runat server. But this is not correct. This error will come even if we put the GridView inside form with runat server. The reason is, in the export to excel logic we are calling RenderControl() method of GridView. So, to render it without any issues we have to override the "VerifyRenderingInServerForm" in our code.  Below is the syntax of the event. Add this to the c# code in code behind file. Remember this event is a Page event means this method you should place in ASPX page. If you are using user control to implement this export to excel logic then below are the ways to go.
1. If your user control is using by less than 3-4 pages then go to each and every page and add this event to the page.
2. If your user control is using by more than 5 pages then the best solution is to create a base page [Which inherits from System.Web.UI.Page class] and all your ASPX pages should inherit from this base page.

public override void VerifyRenderingInServerForm(Control control)
    //Confirms that an HtmlForm control is rendered for the specified ASP.NET 
    //server control at run time.
Now, after we added the event to page, the error will go away for sure.

Saturday, September 11, 2010

The assembly from form template conflicts with a same named assembly in form template

This is the exception which was coming when I tried to deploy the infopath forms to SharePoint environment.

This is the background of the problem. I have infopath project created in visual studio and infopath has 3 views. According to my requirement I have to publish each view as a single infopath form. So totally 3 infopath forms as output. The infopath form has form code in c#. So, we have to deploy dll as well. But, as one version of infopath is already in production, I have to move the new version to production. But, according to some dependency problems, I have to keep the dll of the infopath project as same version as production. So, what I did was opening the AssemblyInfo.cs and changed the assembly version to hard coded like 1.0.3098.12321. There it started the problem. When I tried to deploy the infopath forms below is the exception it was coming.

The assembly infopathproject.dll from form template someform.xsn conflicts with a same named assembly in form template another.xsn

So, after research around 1-2 hours, I found that the three xsn forms are pointing the same dll [I mean along with version]. So, infopath forms are having same dll reference and leads the conflict.

The resolution for this problem is, reverting back the assembly information back to 1.0.* solved the problem. Now infopath forms are pointing to same dll but with different versions. So, problem resolved.

So, if you have the same requirement like same dll using for different infopath forms then, please don't forget to make auto generate versioning for the assembly like 1.0.*.

Hope this helps to solve the problem.

Thursday, September 9, 2010

Setting views dynamically in infopath form through code

When working with infopath forms, there are lot of things we have to know. This is not very easy to implement, publish and using it. So, we have to know complete details about infopath in all aspects. I had a requirement in infopath, while loading depends on some scenario I have to switch the view. While form is loading I have logic written to know what view I have to set. But, once I got the view name from logic, how to set that to infopath form? Below is the simple code which works for that requirement.
the "e" used in this code is the LoadingEventArgs object in the form event. It has the method named SetDefaultView(), Which takes the view name as the parameter. So, once you set it, it will apply the view to the infopath and display the view on the form.

Hope this helps to understand better the infopath and code.