Null data issue RSS

• • Reply
  shafiqkr

  Member

  96 Points

  386 Posts

  Null data issue

  Feb 27, 2012 03:38 AM|shafiqkr|LINK

  Hi all,

  i have a field in class as below

   public int remDays { get; set; }

  this get the number of days (days difference betweeen two dates)......start and end date may be null in database.

  when this return null then i m getting exception here(Cannot cast DBNull.Value to type 'System.Int32'. Please use a nullable type)

   var query = from o in dsResult.Tables[0].AsEnumerable()
                              select new ban
                              {
                                 
                                  remDays = o.Field<int>("remDays")
  
  
                              };
                  List<ban> lstDisplay = new List<ban>();
                  lstDisplay.AddRange(query);

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• • Reply
  Steelymar

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  10925 Points

  2218 Posts

  Re: Null data issue

  Feb 27, 2012 03:55 AM|Steelymar|LINK

  use :

  public int? remDays { get; set; }

  and get the value with:

  remDays.Value

   

• • Reply
  vinay13mar

  Contributor

  5745 Points

  1899 Posts

  Re: Null data issue

  Feb 27, 2012 04:03 AM|vinay13mar|LINK

  Hi try this

  public int? remDays { get; set; }

  after tis assign value in below way

  remDays = (int)o.Field<int>("remDays") 
  

  Thanks
  V.K.Singh
  
  
  
• • Reply
  vinay13mar

  Contributor

  5745 Points

  1899 Posts

  Re: Null data issue

  Feb 27, 2012 04:03 AM|vinay13mar|LINK

  Hi try this

  public int? remDays { get; set; }

  after this assign value in below way

  remDays = (int)o.Field<int>("remDays") 
  

  Thanks
  V.K.Singh
  
  
  
• • Reply
  shafiqkr

  Member

  96 Points

  386 Posts

  Re: Null data issue

  Feb 27, 2012 04:14 AM|shafiqkr|LINK

  vinay13mar

  public int? remDays { get; set; }

  this give me this error

  Cannot cast DBNull.Value to type 'System.Int32'. Please use a nullable type...

  i am sure that i have null in table and it return me null(wehn i run query in sqlserver)

  Please 'Mark as Answer' if this post helps you