How to add a new item to the beginning of the list<T> [Answered]RSS

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  garygold2

  Member

  9 Points

  17 Posts

  How to add a new item to the beginning of the list<T>

  Jul 18, 2014 02:26 AM|garygold2|LINK

  Hi,
  I have
  public struct Bar     
  {
      public double Time  { get; set; }
      public double Open  { get; set; }
      public double Close { get; set; }
   }

  public class Bars
  {        
      public static List<Bar> list = new List<Bar>();
  }
  
  My app
  
    Bars.list.Add(new Bar() { Time = 13123121, Open = 1.2345, Close =1.3456 });   // it's OK
  
  then I need to add a new item to the beginning of the list
  
  Bar newBar = new Bar() { Time = 13123555, Open = 1.2375, Close =1.3457 });

  Bars.list.InsertRange(0, newBar);  
  // error   The best overloaded method match for 'System.Collections.Generic.List<Bar>.InsertRange(int, System.Collections.Generic.IEnumerable<Bar>)' has some invalid arguments  
  or
  Bars.list.InsertRange(0, (IEnumerable<Bar>)newBar);
  // error Cannot convert type 'Bar' to 'System.Collections.Generic.IEnumerable<Bar>'
  
  Thanks
  
               
  
  
  
  
  

• • Reply
  MetalAsp.Net

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  101931 Points

  20703 Posts

  Moderator

  Re: How to add a new item to the beginning of the list<T>

  Jul 18, 2014 02:32 AM|MetalAsp.Net|LINK

  Use the Insert method instead of InsertRange.

  Refer: http://msdn.microsoft.com/en-us/library/sey5k5z4(v=vs.110).aspx

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