Everything I find through Google refers to Code First so I'm wondering what the Key attribute is actually doing in regards to a Database First design? I'm mainly curious because a lot of the entities contain composite keys so I've been adding the Key annotation to the respective properties, but is this really necessary? And if so, what do I gain from it?
What does the `Key` Data Annotation do in database first?
949 Views Asked by MisterIsaak At
1
There are 1 best solutions below
Related Questions in ENTITY-FRAMEWORK
- Is it possible to use ES5 JavaScript with Angular 2 instead of TypeScript?
- Module '"angular2/angular2"' has no exported member 'For'
- import syntax in typescript creating another js file in visual studio
- Separate ts file for imports
- How to use an AngularJS 2 component multiple times in the same page?
- injectables not working in angular 2.0 latest build 26
- Does angular2 bootstrap have a way to dynamically target elements like it does in angular 1.x
- Import {} from location is not found in VS Code using TypeScript and Angular 2
- Angular 2/Typescript: require not found
- ng-switch in Angular2
Related Questions in DATA-ANNOTATIONS
- Is it possible to use ES5 JavaScript with Angular 2 instead of TypeScript?
- Module '"angular2/angular2"' has no exported member 'For'
- import syntax in typescript creating another js file in visual studio
- Separate ts file for imports
- How to use an AngularJS 2 component multiple times in the same page?
- injectables not working in angular 2.0 latest build 26
- Does angular2 bootstrap have a way to dynamically target elements like it does in angular 1.x
- Import {} from location is not found in VS Code using TypeScript and Angular 2
- Angular 2/Typescript: require not found
- ng-switch in Angular2
Related Questions in DTO
- Is it possible to use ES5 JavaScript with Angular 2 instead of TypeScript?
- Module '"angular2/angular2"' has no exported member 'For'
- import syntax in typescript creating another js file in visual studio
- Separate ts file for imports
- How to use an AngularJS 2 component multiple times in the same page?
- injectables not working in angular 2.0 latest build 26
- Does angular2 bootstrap have a way to dynamically target elements like it does in angular 1.x
- Import {} from location is not found in VS Code using TypeScript and Angular 2
- Angular 2/Typescript: require not found
- ng-switch in Angular2
Related Questions in DATA-TRANSFER-OBJECTS
- Is it possible to use ES5 JavaScript with Angular 2 instead of TypeScript?
- Module '"angular2/angular2"' has no exported member 'For'
- import syntax in typescript creating another js file in visual studio
- Separate ts file for imports
- How to use an AngularJS 2 component multiple times in the same page?
- injectables not working in angular 2.0 latest build 26
- Does angular2 bootstrap have a way to dynamically target elements like it does in angular 1.x
- Import {} from location is not found in VS Code using TypeScript and Angular 2
- Angular 2/Typescript: require not found
- ng-switch in Angular2
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular # Hahtags
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
If you're using the database-first workflow (i.e. you have an .edmx file in your solution). Then the
Keyattribute will have no effect.However, if you're using the code-first workflow to map to an existing database, the
Keyattribute tells code first that that property is part of the entity's primary key.For more info on the different workflows see this video: Visual Studio Toolbox: Entity Framework Part 1