Xaml中的动态列绑定 [英] Dynamic column binding in Xaml

问题描述

这是以前发布的后续问题（这里）。

This is a follow up question from an earlier post (here).

我有一些标题信息存储为：
字典< string，string> - 第一个字符串表示字段名称，第二个字符串表示要显示的标题。

I have some 'header' information stored as: Dictionary<string,string> - where the first string represents the field name, and the second the heading I want displayed.

我有一组动态数据存储为：
字典< string，object> - 其中string是字段名。

I have a set of dynamic data that is stored as: Dictionary<string, object> - where string is the field name.

我绑定到这在xaml中为：

I bind to this in xaml as:

<data:DataGrid Name="_dataGrid" AutoGenerateColumns="True"  IsReadOnly="False" Margin="5" Height="200">
            <data:DataGrid.Columns>
                <data:DataGridTextColumn Header="Forename" CanUserSort="True" SortMemberPath="Forename" 
                                          Binding="{Binding Converter={StaticResource RowIndexConverter},
                                            ConverterParameter=Forename}"/>
                <data:DataGridTextColumn Header="Surname" CanUserSort="True" SortMemberPath="Surname" 
                                         Binding="{Binding Converter={StaticResource RowIndexConverter},
                                            ConverterParameter=Surname}"/>
                <data:DataGridTextColumn Header="Age" CanUserSort="True" SortMemberPath="Age" 
                                         Binding="{Binding Converter={StaticResource RowIndexConverter},
                                            ConverterParameter=Age}"/>
                <data:DataGridTextColumn Header="Shoesize" CanUserSort="True" SortMemberPath="Shoesize" 
                                         Binding="{Binding Converter={StaticResource RowIndexConverter},
                                            ConverterParameter=Shoesize}"/>                
            </data:DataGrid.Columns>
        </data:DataGrid> 

问题1 我想自动生成这些列（使用提供的标题信息）

Problem 1 I want to autogenerate these columns (using the header information supplied)

问题2 我希望根据它们的数据类型生成列（即布尔=复选框）

Problem 2 I want the columns to be generated based on what datatype they are (i.e. boolean = checkbox)

问题3 理想情况下，我还要指定天气，一个按钮应该存在于第一列或不存在（即编辑/查看按钮）通过数据绑定

Problem 3 Ideally I would also like to specify weather a button should exist in the first column or not (i.e. an edit / view button) via databinding

推荐答案

我使用了一种遵循这个伪代码的模式的方法

I've used an approach that follows the pattern of this pseudocode

columns = New DynamicTypeColumnList()
columns.Add(New DynamicTypeColumn("Name", GetType(String)))
dynamicType = DynamicTypeHelper.GetDynamicType(columns)

DynamicTypeHelper.GetDynamicType（）生成具有简单属性的类型。请参阅此帖关于如何生成这样的类型的细节

DynamicTypeHelper.GetDynamicType() generates a type with simple properties. See this post for the details on how to generate such a type

然后实际使用该类型，做这样的事情

Then to actually use the type, do something like this

Dim rows as List(Of DynamicItem)
Dim row As DynamicItem = CType(Activator.CreateInstance(dynamicType), DynamicItem)
row("Name") = "Foo"
rows.Add(row)
dataGrid.DataContext = rows

这篇关于Xaml中的动态列绑定的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！