Add Entity Framework Model to Class Library

Question

I have created a class library and added a EF Model but as soon as I declare a variable my project just skip the rest of my code without any error. I do not understand what is causing this to happen.

Library Code

public class Phisc
{
    //Global DB Entity variable
    live_restoreEntities db = new live_restoreEntities();

    //Write data to file
    public void PhiscFile(int value)
    {
        string strFileName, strFilePath;
        StreamWriter stm;

        //Create a file name that will be created
        strFileName = DateTime.Now.ToString("yyyyMMddHHmmss") + "_PHISC";
        //The path that were the file will be saved
        strFilePath = "c:\\" + strFileName + ".txt";

        //Validate if file exists
        if (!System.IO.File.Exists(strFilePath))
            System.IO.File.Create(strFilePath).Dispose();

        stm = new StreamWriter(strFilePath, false);

        stm.Write("This is a test message from C#");

        stm.Close();
    }
}

WinForm Code

private void Form1_Load(object sender, EventArgs e)
{
    Phisc.Phisc pFile = new Phisc.Phisc();
    pFile.PhiscFile(14);
}

When I create a instance of the library it does not hit my PhiscFile Method.

I have added a breakpoint to it and it stops at this constructor

public live_restoreEntities() : base("name=live_restoreEntities", "live_restoreEntities")
{
    this.ContextOptions.LazyLoadingEnabled = true;
    OnContextCreated();
}

I am using a windows application to test my library

Please edit your question and post the code surrounding ´live_restoreEntities db = new live_restoreEntities();´. — user176134
– user176134, Commented Dec 18, 2013 at 10:20
And what exactly is the problem now? What code gets skipped? — user176134
– user176134, Commented Dec 18, 2013 at 10:46
All of my code get skipped. It hits my declaration and then it just skip all my code. — Gericke
– Gericke, Commented Dec 18, 2013 at 11:03
Then the problem should be something along the lines of the answer by Jens Kloster. — user176134
– user176134, Commented Dec 18, 2013 at 11:57

Jens Kloster · Accepted Answer · 2013-12-18 10:43:33Z

1

The parameterless constructor goes out and look for the conenctionstring in the App.config file. It look next to the .exe file.

I'm guessing that you need to include your App.config (from your entity library) to your WinForms library.

In the App.config, it should look like this:

<configuration>
  <connectionStrings>
    <add name="live_restoreEntities" 
         connectionString="<your connection string here>"
         providerName="System.Data.EntityClient" />
  </connectionStrings>
</configuration>

edited Dec 18, 2013 at 10:43

answered Dec 18, 2013 at 10:20

Jens Kloster

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4 Comments

user176134 Over a year ago

If this was the case, then the c'tor of the db context would throw an exception.

Jens Kloster Over a year ago

@ThomasWeller yes you are right. I believe that OP's is just not been shown the exception.. perhaps some IDE configuration could reviel it.

user176134 Over a year ago

You should see it in the debugger anyway, right? Also, in case of an exception, the breakpoint inside the c'tor wouldn't be hit.

Jens Kloster Over a year ago

@ThomasWeller if the breakpoint is at the decalring line of the constructor, then it will "hit" that breakpoint, before continuening to the base("...") where I belive the exception is thrown.

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