Web API 2 学习笔记 - 分页

Web API 2.2 odata v4 -系列的学习笔记，只共我个人参考。如果您不小心看了，发现有错误，请指正我，如果你是想学习，请离开哦 ！

 

参考 : http://www.asp.net/web-api/overview/odata-support-in-aspnet-web-api/supporting-odata-query-options (这个是v3哦)

不 response odata format 的做法是这样的 

[Route("")]
//[EnableQuery] <--不要放这个！  
public PageResult<Salesman> Get(ODataQueryOptions<Salesman> options)
{
    //有set分页，才会有NextLink
    ODataQuerySettings settings = new ODataQuerySettings()
    {
        PageSize = 2
    };
    //因为没有[EnableQuery]，所以这里我们要自己来valid一下
    ODataValidationSettings vSettings = new ODataValidationSettings() {
        AllowedQueryOptions = AllowedQueryOptions.Count | AllowedQueryOptions.Filter   //support count and filter only      
    };
    options.Validate(vSettings); //这里fail会 throw ODataException
          
    IQueryable results = options.ApplyTo(db.salesmans, settings);
    return new PageResult<Salesman>(
                results as IEnumerable<Salesman>,
                Request.ODataProperties().NextLink,
                Request.ODataProperties().TotalCount
            );
}

Js
var xhr = new XMLHttpRequest();
xhr.open("GET", "//localhost:4931/api/salesmans?$count=true", true);  //$count=true 是 odata v4. v3 是$inlinecount=allpages
xhr.setRequestHeader("accept", "application/json");
xhr.send(null);