Yozian.Extension 1.0.0

Useful Extension methods

Currently wiki is under working, you could take a look into test project to get examples.

Type Decorated

• Exception
• Expression
• ICollection
• IDicationary
• IEnumerable
• IQueryable
• Object
• String

Take IQueryable Extension method as example

conditional query where closure

The example shows the extension method WhereWhen eliminate if statement block.

The constrain applied only when the condition matched, so that you could achieve dynamic query easily!

var books = await this.dbContext.Book
                .Where(x => x.Name.Equals(request.Name))
                .WhereWhen(
                    !string.IsNullOrEmpty(request.Category),
                    x => x.Category.Equals(request.Category)
                )
                .WhereWhen(
                    request.PublishDate.HasValue,
                    x => x.PublishDate.Equals(request.PublishDate)
                )
                .ToListAsync();

for old school way, would have lots of if statement block

var query = this.dbContext.Book
                .Where(x => x.Name.Equals(request.Name));

if(!string.IsNullOrEmpty(request.Category)){
    query = query.Where(x => x.Category.Equals(request.Category))
}

if(request.PublishDate.HasValue){
    query = query.Where(x => x.PublishDate.Equals(request.PublishDate))
}

var books = await query.ToListAsync();

feel free for pull request