static Expression <Func <IssueData, bool> > MakeFilterExpression(CriteriaOperator filter)
{
var converter = new GridFilterCriteriaToExpressionConverter <IssueData>();
converter.RegisterFunctionExpressionFactory(
operatorType: FunctionOperatorType.StartsWith,
factory: (string value) => {
var toLowerValue = value.ToLower();
return(x => x.ToLower().StartsWith(toLowerValue));
});
return(converter.Convert(filter));
}
static FetchRowsResult FetchRows(FetchRowsAsyncEventArgs e)
{
var filterWithSkipToken = CriteriaOperator.And(e.Filter, (CriteriaOperator)e.SkipToken);
var converter = new GridFilterCriteriaToExpressionConverter <IssueData>();
var filterExpression = converter.Convert(filterWithSkipToken);
const string defaultUniqueSortProperty = "Id";
var context = new IssuesContext();
var queryable = IssueData.Select(context.Issues)
.SortBy(e.SortOrder, defaultUniqueSortPropertyName: defaultUniqueSortProperty)
.Where(filterExpression);
var issues = queryable
.Take(e.Take ?? 30)
.ToArray();
var nextSkipToken = SkipTokenHelper.MakeFilterSkipToken(e.SortOrder, defaultUniqueSortProperty, issues.LastOrDefault());
return(new FetchRowsResult(issues, nextSkipToken: nextSkipToken));
}
static Expression <Func <SCIssuesDemo, bool> > MakeFilterExpression(CriteriaOperator filter)
{
var converter = new GridFilterCriteriaToExpressionConverter <SCIssuesDemo>();
return(converter.Convert(filter));
}
static Func <IssueData, bool> MakeFilterPredicate(CriteriaOperator filter)
{
var converter = new GridFilterCriteriaToExpressionConverter <IssueData>();
return(converter.Convert(filter).Compile());
}
