一个DataGridColumn SortMemberPath上MultiBinding [英] DataGridColumn SortMemberPath on MultiBinding

问题描述

我想对数字内容的列排序。多结合转换器工作正常。
该解决方案将设置SortMemberPath为空

I'm trying to have column sort on numeric content. Multi-binding converter works fine. This solution will set SortMemberPath to null

我已经尝试了多种方式，大幅度冲刷互联网。

I've tried a variety of ways, and scoured the internet substantially.

code已经从原来的修改为安全起见。

Code has been modified from original for security purposes.

<DataGridTemplateColumn x:Name="avgPriceColumn">
<DataGridTemplateColumn.CellTemplate>
    <DataTemplate>
        <TextBlock>
            <TextBlock.Text>
                <MultiBinding Converter="{StaticResource avgPriceConverter}">
                    <Binding Path="NumberToDivideBy" />
                    <Binding Path="TotalDollars" />
                </MultiBinding>
            </TextBlock.Text>
        </TextBlock>
    </DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.SortMemberPath>
    <MultiBinding Converter="{StaticResource avgPriceConverter}">
        <Binding Path="NumberToDivideBy" />
        <Binding Path="TotalDollars" />
    </MultiBinding>
</DataGridTemplateColumn.SortMemberPath>
</DataGridTemplateColumn>

编辑：
我找到一种方式来获得数据绑定不multibinding工作，但排序仍然无法正常工作。由于DataGrid绑定到一个自定义类，我采取整体价值，并从该转换，从而减少了MultiBinding的需求。

I found a way to get data binding to work without multibinding, but sorting still doesn't work. Since DataGrid is bound to a custom class, I take in whole value and convert from that, thus reducing the need for MultiBinding.

<DataGridTextColumn x:Name="avgPriceColumn" Binding="{Binding Converter={StaticResource avgPriceConverter}}" SortMemberPath="{Binding Converter={StaticResource avgPriceConverter}}" />

在这两个选项SortMemberPath是默认设置为绑定，所以我并不需要明确地定义它，因为我有

On both these options SortMemberPath is default set to Binding so I don't need to explicitly define it as I have

不过，这最终设置SortMemberPath值设置为null它适用于我的code环境自定义约束，矛盾，不排序。所以，我仍然有兴趣更好的解决方案。

However this ends up setting SortMemberPath value to null which conflicts with custom constraints applicable to my code environment, and doesn't sort. So I am still interested in better solutions.

编辑：

变更冲突的code别处允许重复SortMemberPath的，不支持对某些列排序，以及一些邻国断柱值

Changed conflicting code elsewhere to allow duplicate SortMemberPath's, don't support sorting on some columns, and for some sort off neighbouring-column value

推荐答案

<一个href=\"http://msdn.microsoft.com/en-us/library/system.windows.controls.datagridcolumn.sortmemberpath%28v=vs.110%29.aspx\">SortMemberPath期待一个属性的名称（例如，TotalDollars），而不是个人计算行值。认为它像头，你整个列设置一次。你的转换器会返回一个数字，如15，其中SortMemberPath想要一个绑定路径字符串。

SortMemberPath is expecting the name of a property (e.g. "TotalDollars") not an individual computed row value. Think of it like the header, you set it once for the whole column. Your converter would be returning a number like 15 where SortMemberPath wants a binding path string.

这浮现在脑海中有两个选项：

Two options that come to mind:

1. 提供您的支持对象（例如AveragePrice），并绑定到一个计算的属性。没有必要转换器或排序成员路径。

1. Provide a computed property on your backing object (e.g. "AveragePrice") and bind to that. No converter or sort member path necessary.

public double AveragePrice
{
    get { return TotalDollars / NumberToDivideBy; }
}

指定的<一个href=\"http://msdn.microsoft.com/en-us/library/system.windows.controls.datagrid.onsorting.aspx\">OnSorting事件处理像这样的question.

希望它帮助。 ：）

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