のIQueryable変換はint - はsortOrderとFiltring

Question

intは含まれてい「の定義が含まれていない 『』と最高の拡張メソッドのオーバーロード 『Queryable.Contains（のIQueryable、文字列）』タイプの受信機を必要とする」のIQueryable

これは、コントローラのコードの一部です：

 var projects = db.Projects.Include(p => p.Engineer).Include(p => p.SiteLocation); 

     // var projects = from p in db.Projects 
     // select p; 

     if (!String.IsNullOrEmpty(searchString)) 
     { 
      projects = projects.Where(p => p.NumberMCP.Contains(searchString) 
      || p.nameProject.Contains(searchString) || 
      p.Ptype.Contains(searchString) || p.EngineerID.Contains(searchString)); 
     } 

プロジェクトモデル

public partial class Project 
{ 
    public int ProjectID { get; set; } 
    [DisplayName("MCP")] 
    [Required(ErrorMessage = "NumberMCP es requerido")] 
    public string NumberMCP { get; set; } 
    [DisplayName("Ingeniero")] 
    [Required(ErrorMessage = "Tarjeta Ingeniero es requerido")] 
    public int EngineerID { get; set; } 
    [DisplayName("Localidad")] 
    [Required(ErrorMessage = "ID Localidad es requerido")] 
    public int SiteLocationID { get; set; } 
    [DisplayName("Descripción")] 
    [Required(ErrorMessage = "Descripción es requerido")] 
    public string nameProject { get; set; } 
    [DisplayName("Tipo Proyecto")] 
    [Required(ErrorMessage = "Tipo Proyecto es requerido")] 
    public string Ptype { get; set; } 
    [DisplayName("Año")] 
    [Required(ErrorMessage = "Año es requerido")] 
    public Nullable<int> Pyear { get; set; } 
    [DisplayName("Link del Proyecto")] 
    [Required(ErrorMessage = "Link del Proyecto")] 
    public string Plink { get; set; } 

    public virtual Engineer Engineer { get; set; } 
    public virtual SiteLocation SiteLocation { get; set; } 
} 

}

Answer 1

使用int.TryParseと文字通りint型にint型を比較します

if (!String.IsNullOrEmpty(searchString)) 
{ 
    int searchInt = 0; 
    var isInt = int.TryParse(searchString, out searchInt); 

    projects = projects.Where(p => 
      (isInt && p.NumberMCP == searchInt) || 
      (!isInt && p.nameProject.Contains(searchString)) || 
      (!isInt && p.Ptype.Contains(searchString)) || 
      (isInt && p.EngineerID == searchInt) 
    ); 
}