Gunnar Peipman's ASP.NET blog
ASP.NET, C#, SharePoint, SQL Server and general software development topics.
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Generating radial indicator images using C#
In one of my projects I needed to draw radial indicators for processes measured in percent. Simple images like the one shown on right. I solved the problem by creating images in C# and saving them on server hard disc so if image is once generated then it is returned from disc next time. I am not master of graphics or geometrics but here is the code I wrote. -
Travelling MVP #2: Community event at Bucharest, Romania
My second trip was to DevReach with two stops. My first stop was at Bucharest where I met with my friend Dimitar Georgiev who is one of authors of Gym Realm service. Romanian MVP Andrei Ignat was our host there and organized meeting with local community guys. With me – it was first time in my life – was one more guy from Estonia visiting DevReach and he made the whole trip with me.
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Travelling MVP #1: Visit to SharePoint User Group Finland
My first self organized trip this autumn was visit to SharePoint User Group Finland community evening. As active community leaders who make things like these possible they are worth mentioning and on spug.fi side there was Jussi Roine the one who invited me. Here is my short review about my trip to Helsinki.
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Session: Optimizing performance of public SharePoint sites
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Session: Deep-Dive to ASP.NET Web API
This is the support page for my ASP.NET Web API deep-dive session.
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Hosting WCF service in Windows Service
When building Windows services we often need a way to communicate with them. The natural way to communicate to service is to send signals to it. But this is very limited communication. Usually we need more powerful communication mechanisms with services. In this posting I will show you how to use service-hosted WCF web service to communicate with Windows service.
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Reading OpenDocument spreadsheets using C#
Excel with its file formats is not the only spreadsheet application that is widely used. There are also users on Linux and Macs and often they are using OpenOffice and other open-source office packages that use ODF instead of OpenXML. In this post I will show you how to read Open Document spreadsheet in C#.
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Adding multiple data importers support to web applications
I’m building web application for customer and there is requirement that users must be able to import data in different formats. Today we will support XLSX and ODF as import formats and some other formats are waiting. I wanted to be able to add new importers on the fly so I don’t have to deploy web application again when I add new importer or change some existing one. In this posting I will show you how to build generic importers support to your web application.
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Using AutoMapper to build base class for mappers between domain classes and models
It is often good idea to isolate our domain model from consuming applications by using service layer and data transfer objects (DTO) or application specific models. Using DTO-s means that we need two-way mapping between domain classes and DTO-s. In this posting I will show you how to use AutoMapper to build generic base class for your mappers.
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ASP.NET MVC: Creating user configurable charts
Although summer here is awful and nice at same time it’s time to blog. Couple of years ago I wrote about how to use MS Chart control in ASP.NET MVC projects. Now let’s extend my solution and let’s add support for simple chart modifications. I used this solution in one of my projects to let users visualize their data better.