QueryParamsModel

using System; using System.Collections.Generic; using System.Linq; using System.Linq.Expressions; using System.Text; namespace Model.Model { public class QueryParamsModel { public string Filter { get; set; } public string SortOrder { get; set; } public string SortField { get; set; } public int PageSize { get; set; } public int PageNumber { get; set; } public IQueryable Sort(IQueryable query) { if (!string.IsNullOrEmpty(this.SortField)) { var entityType = typeof(T); var property = entityType .GetProperties() .FirstOrDefault(c => c.Name.ToLowerInvariant() == this.SortField.ToLowerInvariant()); if (property != null) { var parameterExp = Expression.Parameter(entityType); var memberExp = Expression.MakeMemberAccess(parameterExp, property); var bodyExp = Expression.Convert(memberExp, typeof(object)); var lambdaExp = Expression.Lambda>(bodyExp, parameterExp); if (this.SortOrder == "desc") { query = query.OrderByDescending(lambdaExp); } else { query = query.OrderBy(lambdaExp); } } } return query; } } }

karakter veya metin tekrar ettirme

string.Concat(Enumerable.Repeat("ab", 2));

Returns

"abab"

And

Foreach döngü sırasını bulma

 foreach (var x in list.Select((value, index) => new { value, index }))
 {
     // Use x.value and x.index in here
 }

LINQ ile rastgele şifre üretmek

var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
var random = new Random();
var result = new string(
    Enumerable.Repeat(chars, 8)
              .Select(s => s[random.Next(s.Length)])
              .ToArray());

Model doğrulama

 private IList<ValidationResult> ValidateModel(object model)
        {
            var validationResults = new List<ValidationResult>();
            var ctx = new ValidationContext(model);
            Validator.TryValidateObject(model, ctx, validationResults, true);
            return validationResults;
        }

içine aldığı modelin [Required] attributelerinden girilmeyenleri yakalıyor.

linq tekrar eden string

formControl.SendKeys(new string(Enumerable.Repeat('a', Convert.ToInt32(lengtMin) + 1).ToArray()));