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Inside Microsoft patterns & practices: Dependency Injection in Libraries

Posted By:      Posted Date: August 21, 2010    Points: 0   Category :ASP.Net

This article discusses how to write a library or framework that uses the Dependency Injection pattern and how the change in focus affects the usage of the pattern.

Chris Tavares

MSDN Magazine November 2009

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The current build operation (build key Build Key[Microsoft.Practices.EnterpriseLibrary.Data.Database


Hello everybody,


i am encountering an exception in my in my application at these lines of code.


DatabaseProviderFactory dbFactory =

new DatabaseProviderFactory(dataSource);// Create and return a database object.


return dbFactory.Create(name);


i am getting this exception at the create line


The current build operation (build key Build Key[Microsoft.Practices.EnterpriseLibrary.Data.Database, 125ba2c1-9573-45be-b8a2-b370deff980d]) failed: Exception has been thrown by the target of an invocation. (Strategy type ConfiguredObjectStrategy, index 2)


I have referenced the proper assemblies in my project and on  other systems, its working fine.

The connection string is DB2.My db2 connection is also good with no issues. My stack Trace

UserControl, CustomControl Design Time Support errors IOC, Dependency Injection, MVP

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Hi everyone and I would like to thank in advance for any help related to the problem I am having.We are trying to move a legacy aplication from framework 2 to 4, and one of the components that is moving forward as well is the Enterprise Library.  Unfortunatly it i s th eonly thing that gives us a lots of grief....  To ilustrate the problem, I wrote a small sample.  Here is the code.using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data; using System.Data.Common; using Microsoft.Practices.EnterpriseLibrary.Data; using Microsoft.Practices.EnterpriseLibrary.ExceptionHandling; using Microsoft.Practices.EnterpriseLibrary.Logging; using Microsoft.Practices.EnterpriseLibrary.Common; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Label2.Text = "Enter Parameter"; Button1.Text = "Go"; TextBox1.Text = String.Empty; TextBox2.Text = "1"; } protected void Button1_Click(object sender, EventArgs e) { DataSet ds = null; DbCommand dbCommand = null; Database db = null; int num = 0; int.TryParse(TextBox2.Text, out num); try { db = DatabaseFactory.CreateDatabase(); dbCommand = db.GetStoredProcCommand("dbo.sps_HierarchyLev

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