如何按多个值对列表框进行排序 [英] How do I sort a listbox by multiple values

问题描述

嗨大家好



目前我有一个问题，试图对列表框进行排序，我遇到的问题是我试图按属性排序但没有任何运气



我需要对3种不同的属性进行排序

排序

 Attribute1 

然后

 Attribute2 

然后

 Attribute3 

但没有运气



我尝试过：

公共类CustomComparer：System.Collections.IComparer 
 {
 public int Compare（object x，object y）
 {
 RadListBoxItem p1 = new RadListBoxItem（）; 
 RadListBoxItem p2 = new RadListBoxItem（）; 
 if（x是RadListBoxItem）
 p1 = x as RadListBoxItem; 
 else 
抛出新的ArgumentException（Object不是RadListBoxItem类型。）; 
 if（y是RadListBoxItem）
 p2 = y作为RadListBoxItem; 
 else 
抛出新的ArgumentException（Object不是RadListBoxItem类型。）; 
 int cmp = 0; 
 if（p1.ListBox.Sort == RadListBoxSort.Ascending）
 {
 //这里我们比较项目的值
 if（String.Compare（p1.Value， p2.Value，！p1.ListBox.SortCaseSensitive）== 0）
 {
 return 0; 
} 
 if（String.Compare（p1.Attributes [Attribute1]，p2.Attributes [AgentHierachy]，！p1.ListBox.SortCaseSensitive）== 0）
 {
返回0; 
} 
 if（String.Compare（p1.Attributes [Attribute2]，p2.Attributes [SubAgentID]，！p1.ListBox.SortCaseSensitive）== 0）
 {
返回0; 
} 
 
} 
 if（p1.ListBox.Sort == RadListBoxSort.Descending）
 {
 //这里我们比较项目的值
 cmp = String.Compare（p1.Value，p2.Value，！p1.ListBox.SortCaseSensitive）* -1; 
} 
返回cmp; 
} 
 

解决方案

如果这是WPF，你可以简单地使用绑定到控件的集合进行排序Linq：

 collection.OrderBy（x => x.Property1）.ThenBy（x => x.Property2）。 ThenBy（x => x.Property3）

当然，这只是一个概念性的代码，你必须适应你的代码。

Hi Guys

Currently i have an issue trying to sort a listbox, issue i am having is i have tried to sort by the attributes but not having any luck

I need to do the sort on 3 different attributes
sort by

Attribute1

then

Attribute2

then

Attribute3

but having no luck

What I have tried:

public class CustomComparer : System.Collections.IComparer
       {
           public int Compare(object x, object y)
           {
               RadListBoxItem p1 = new RadListBoxItem();
               RadListBoxItem p2 = new RadListBoxItem();
               if (x is RadListBoxItem)
                   p1 = x as RadListBoxItem;
               else
                   throw new ArgumentException("Object is not of type RadListBoxItem.");
               if (y is RadListBoxItem)
                   p2 = y as RadListBoxItem;
               else
                   throw new ArgumentException("Object is not of type RadListBoxItem.");
               int cmp = 0;
               if (p1.ListBox.Sort == RadListBoxSort.Ascending)
               {
                   //here we compare the Values of the items
                   if (String.Compare(p1.Value, p2.Value, !p1.ListBox.SortCaseSensitive) == 0)
                   {
                       return 0;
                   }
                   if (String.Compare(p1.Attributes["Attribute1"], p2.Attributes["AgentHierachy"], !p1.ListBox.SortCaseSensitive) == 0)
                   {
                       return 0;
                   }
                   if (String.Compare(p1.Attributes["Attribute2"], p2.Attributes["SubAgentID"], !p1.ListBox.SortCaseSensitive)==0)
                   {
                       return 0;
                   }

               }
               if (p1.ListBox.Sort == RadListBoxSort.Descending)
               {
                   //here we compare the Values of the items
                   cmp = String.Compare(p1.Value, p2.Value, !p1.ListBox.SortCaseSensitive) * -1;
               }
               return cmp;
           }

解决方案

If this is WPF, you could simply sort the collection that's bound to the control using Linq:

collection.OrderBy(x=>x.Property1).ThenBy(x=>x.Property2).ThenBy(x=>x.Property3)

Of course, this is just conceptual code that you'll have to adapt to your code.

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