Friday, 28 September 2012

How to create the DataContracts and Translators for Entity Framework generated objects

Think I've just come up with a fool proof method for creating datacontracts and associated translator logic from Entity Framework generated objects

Creating datacontracts

1. Grab the class definition from the xxxModel.cs file in xxxx.DataContracts.csproj project

2. Paste into a new file in the xxx.DataContracts namespace

3. Use Resharper to clean up the code (Ctrl +E , Ctrl + C), choose full format option

4. Suspend off Resharper (Tools, options ,Resharper)

5. Grab the primitives section and change privates to publics

6. Replace ; with { get; set; } and then replace _ with empty string

7. That's it, you now have your matching datacontract with no typos and property names matching the auto generated ones in the xxxModel.cs file.

Creating translators (little bit more involved) method

1. Use the following regex replace expression on the pasted properties from the class you created above.

Remember to paste them from the datatype definition onwards, and put them at the start of the line in the mapping class first! e.g.

String Author { get; set; }
String DMlibraryName { get; set; }
DateTime? DateCreated { get; set; }
String DocNAME { get; set; }
int? DocNumber { get; set; }
String DocPath { get; set; }
String DocTypeCode { get; set; }
String DocTypeDescription { get; set; }
Int32 IsDMType { get; set; }
Int32 IsRRAKMANType { get; set; }
int? PersonID { get; set; }
int? ProjectID { get; set; }
String ProjectLabel { get; set; }
String htmlLocation { get; set; }

Find: ^([a-zA-Z_$][a-zA-Z0-9_$?]*):b{(.*)}\{(.*)
Replace with: source.\1 = dest.\1;

Result is as follows...

source.Author  = document.Author;
source.DMlibraryName  = document.DMlibraryName;
source.DateCreated  = document.DateCreated;
source.DocNAME  = document.DocNAME;
source.DocNumber  = document.DocNumber;
source.DocPath  = document.DocPath;
source.DocTypeCode  = document.DocTypeCode;
source.DocTypeDescription  = document.DocTypeDescription;
source.IsDMType  = document.IsDMType;
source.IsRRAKMANType  = document.IsRRAKMANType;
source.PersonID  = document.PersonID;
source.ProjectID  = document.ProjectID;
source.ProjectLabel  = document.ProjectLabel;
source.htmlLocation  = document.htmlLocation;

(Old Creating translators (little bit more involved) method)

1. Turn resharper back on

2. Use the File Structure window

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3. Stick this in Excel and do some manipulation (ask me if you're not sure how to do this)

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4. Paste this back into your C# file, and do a regex replace of \t with nothing

5. That's it, translator code written

How to determine if a process is running in a DOS batch file

 

Trick is to use tasklist.exe and pipe the output through a find then check the errorlevel as follows...

tasklist /FI "IMAGENAME eq WebDev.WebServer40.exe" 2>NUL | find /I /N "WebDev.WebServer40.exe">NUL
if "%ERRORLEVEL%"=="0" GOTO START
echo. Starting web app dev server
call sw.bat

:START

Wednesday, 26 September 2012

JavaScript dates are zero based for month part

It appears that JS treats dates as zero indexed on the month part when you construct them in the format new Date("yyyy", "MM", "dd")

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Friday, 14 September 2012

DataContract attribute gotcha

A little known fact that has caught out a few of our project team members this week, including myself. If you annotate a class with the DataContract attribute, then you must also ensure that the members you want to have serialized are also annotated with the DataMember / EnumMember attribute as well. The ones that aren't annotated will NOT get de-serialized when the data arrives at the consumer of your service method.

Note: If you apply no DataContract annotation at all to the class, then this has the same affect of attributing every member in your class with the DataMember / EnumMember attribute.

To be fair, this is somewhat eluded to in the following Microsoft article, although the part about it being implicit if you don't apply the attribute is not entirely obvious at first...

image

Silverlight 5 also supports a simplified opt-out model for serialization, where these attributes can be omitted from the type and the members of the type to be serialized. The data contract is implicit in the sense that the visibility modifiers (public, private) used by the type determines whether it and its members are included in the data contract. In this model, the name of a member is used to identify it in the serialized representation. A new IgnoreDataMemberAttribute attribute can be used to opt-out a member that is public when required.

How to put a 3 second wait in a batch file

By pinging local host, and piping the output to nowhere you can achieve this as follows...

ping -n 3 localhost >nul

Killing Visual Studio quickly

Stick this in a batch file in your %systemroot%, then you can run it from anywhere

tskill devenv
REM 3 second wait for the macro question to come up
ping -n 3 localhost >nul
tskill vsaenv10
tskill vsmsvr10

Thursday, 13 September 2012

Visual Studio 2010 breakpoint ordering

In case any of you use the breakpoint window for setting bookmarks in code as well, then this will be very useful to you in VS2010, if you were used to VS2008, just putting the latest break point at the end of the list like I was...

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Android mediaserver process killing battery life

If this happens to you, then do the following Force stop on Settings, Applications, All, Media Storage. Clear Cache and Clear Data, fo...