概述
JHRS开发框架之公用组件WPF用户控件封装,这个系列的文章旨在记录工作中使用WPF开发新的医疗项目中,有感于必须统一掉一些规范上的事情,并且提高团队开发效率,遂折腾了这么一个半吊子的框架,这个标题WPF企业级开发框架搭建指南,2020从入门到放弃可能会唬住一些人,但看到这些零碎文字的朋友就凑和着看吧,如果能帮助到你,那也荣幸了。
继上一篇介绍了怎样封装ViewModel的基类,但随着项目大了,一个功能点一个功能点的做,真的累,很多系统里面,在局部有很多相似的功能,数据展示几乎一样的,或许不一样的只是摆放的位置,显示的样式不同罢了;这种东西,一个功能一个功能的实现,那就有点朝着996的状态发展了;因此在JHRS框架中,也体现了懒人干活的思想,那就是能封装成控件的,坚决搞成一个控件,供大家享乐。
JHRS开发框架之公用组件WPF用户控件封装
当然,用户控件可以套在用户控件里面,一个拥有复杂功能的页面,可以由众多的用户控件组成,最终你会发现,用户控件封装得越优雅,做复杂的功能页面也不会很难了,只需要像搭积木那样,把控件丢上去,数据绑定上就完事了,最后如果要调整样式,稍微调整下就OK了。
WPF用户控件封装
因为框架中引入了Prism将各子系统模块化了,所以我们在WPF用户控件封装的时候,分为两种情况,一种是封装整个系统公用的用户控件,另外一种是各子模块自己的用户控件;整个系统公用的用户控件,需要保持着高扩展性,灵活性,即使后期对该控件增加功能,也要尽量做到不影响已经使用该控件的页面(Page),还需要让使用的页面可以灵活的设置一些属性以满足不同页面(Page)的功能需求。
在框架中只封装了3个基本的用户控件,动态列的DataGrid,可调接口的Combobox,动态分页表格。
JHRS开发框架动态列的DataGrid
大部分管理系统,都离不开表格展示数据,而WPF项目中,基本上都会使用DataGrid来展示数据;熟悉WPF开发的朋友都知道,如果手工撸一个表格,那代码贼烦人,需要一个列一个列的写代码并绑定数据;而在JHRS框架中提供的思路是基于注解的方式(自定义BindDescriptionAttribute类用于描述每列)动态生成每一列数据并自动绑定数据,对于复杂的列,如某一列里面展示为下拉框(ComoboBox)或者更复杂的展示,只需要在资源(Resources)里面定义DataTemplate即可,然后动态加载就可以了。对于最每一行的操作列,也是一样的套路。
动态列的DataGrid封装思路是:编写一个DataGridEx类,继承自DataGrid类,在DataGridEx类中,需要定义一个依赖属性我们称为DataSource,用它来绑定数据,然后在DataSourceProperty的回调函数里面把DataSource赋值给原本的 ItemSource属性,最后重写OnInitialized方法,将数据源传入DataGrid的扩展方法GenerateColumns动态生成列就完成了WPF用户控件封装,详见下方代码。
DataGridEx类源码
/// <summary>
/// 輕量級的DataGrid擴展
/// </summary>
public class DataGridEx : DataGrid
{
/// <summary>
/// 構造函數
/// </summary>
public DataGridEx()
{
this.AutoGenerateColumns = false;
this.Loaded += DataGridEx_Loaded;
this.LoadingRow += PagingDataList_LoadingRow;
}
/// <summary>
/// 给表格添加样式
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void DataGridEx_Loaded(object sender, RoutedEventArgs e)
{
this.CanUserAddRows = false;
}
/// <summary>
/// 生成序号
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void PagingDataList_LoadingRow(object sender, DataGridRowEventArgs e)
{
if (EnableRowNumber)
//需要分页
e.Row.Header = e.Row.GetIndex() + 1;
}
/// <summary>
/// 操作列key
/// </summary>
public string OperatingKey { get; set; } = string.Empty;
/// <summary>
/// 操作列的宽度
/// </summary>
public DataGridLength OperationWidth { get; set; }
/// <summary>
/// 是否启用序号
/// </summary>
public bool EnableRowNumber { get; set; } = true;
/// <summary>
/// 禁止显示的列
/// </summary>
public string DisableCloumn { get; set; }
public IEnumerable<object> DataSource
{
get { return (IEnumerable<object>)GetValue(DataSourceProperty); }
set { SetValue(DataSourceProperty, value); }
}
private bool IsGenerateColumns = false;
// Using a DependencyProperty as the backing store for DataSource. This enables animation, styling, binding, etc...
public static readonly DependencyProperty DataSourceProperty =
DependencyProperty.Register("DataSource", typeof(IEnumerable<object>), typeof(DataGridEx), new PropertyMetadata((d, e) =>
{
DataGridEx u = d as DataGridEx;
u.ItemsSource = u.DataSource;
if (u.IsGenerateColumns || u.DataSource == null || u.DataSource.Count() == 0) return;
var index = 0;
if (u.EnableRowNumber)
{
var acolumn = new DataGridTextColumn
{
Header = "序号",
Width = new DataGridLength(50),
Binding = new Binding("Header") { RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(DataGridRow), 1) }
};
u.Columns.Insert(0, acolumn);
index++;
}
u.GenerateColumns(index, u.ItemsSource, u.OperatingKey, u.OperationWidth);
u.IsGenerateColumns = true;
}));
//protected override void OnInitialized(EventArgs e)
//{
// if (IsGenerateColumns || ItemsSource == null) return;
// var index = 0;
// if (EnableRowNumber)
// {
// var acolumn = new DataGridTextColumn
// {
// Header = "序号",
// Width = new DataGridLength(50),
// Binding = new Binding("Header") { RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(DataGridRow), 1) }
// };
// this.Columns.Insert(0, acolumn);
// index++;
// }
// this.GenerateColumns(index, ItemsSource, OperatingKey, OperationWidth);
// IsGenerateColumns = true;
//}
}
以上的基本上是完整的源码,github是参见这里。
DataGridExtensions扩展类源码
/// <summary>
/// DataGrid扩展方法
/// </summary>
public static class DataGridExtensions
{
/// <summary>
/// 动态生成列
/// </summary>
/// <param name="dataGrid">DataGrid控件实例</param>
/// <param name="index">列插入位置</param>
/// <param name="data">数据源</param>
/// <param name="operationKey">操作列资源</param>
/// <param name="operationWidth">操作列宽度</param>
public static void GenerateColumns(this DataGrid dataGrid, int index, object data, string operationKey, DataGridLength operationWidth)
{
IList<BindDescriptionAttribute> list = GetColumns(data);
//Window win = Application.Current.Windows.OfType<Window>().SingleOrDefault(x => x.IsActive);
//Page page = win.GetChildObject<Page>("page");
//if (page == null) throw new Exception("未獲取到當前窗口名稱爲page的(Page)頁面對象,原因:沒有爲Page設置Name,且名稱必須爲【page】!");
Page page = GetParentObject<Page>(dataGrid, "page");
for (int i = 0; i < list.Count; i++)
{
switch (list[i].ShowAs)
{
case ShowScheme.普通文本:
dataGrid.Columns.Insert(i + index, new DataGridTextColumn
{
Header = list[i].HeaderName,
Binding = new Binding(list[i].PropertyName),
Width = list[i].Width
});
break;
case ShowScheme.自定义:
if (page.FindResource(list[i].ResourceKey) != null)
{
DataGridTemplateColumn val = new DataGridTemplateColumn();
val.Header = list[i].HeaderName;
val.Width = list[i].Width;
val.CellTemplate = page.FindResource(list[i].ResourceKey) as DataTemplate;
dataGrid.Columns.Insert(i + index, val);
}
break;
}
}
if (!string.IsNullOrWhiteSpace(operationKey) && page != null)
{
var resource = page.FindResource(operationKey);
if (resource!=null)
{
var col = new DataGridTemplateColumn() { Header = "操作", Width = operationWidth };
col.CellTemplate = resource as DataTemplate;
dataGrid.Columns.Add(col);
}
}
}
/// <summary>
/// 获取数据源对象到列的映射关系
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
private static IList<BindDescriptionAttribute> GetColumns(object data)
{
List<BindDescriptionAttribute> list = new List<BindDescriptionAttribute>();
var pros = data.GetType().GenericTypeArguments[0].GetProperties();
foreach (var item in pros)
{
var a = item.GetCustomAttribute<BindDescriptionAttribute>();
if (a != null) { a.PropertyName = item.Name; list.Add(a); }
}
return list.OrderBy(x => x.DisplayIndex).ToArray();
}
/// <summary>
/// 查找父级控件
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="obj"></param>
/// <param name="name"></param>
/// <returns></returns>
public static T GetParentObject<T>(DependencyObject obj, string name) where T : FrameworkElement
{
DependencyObject parent = VisualTreeHelper.GetParent(obj);
while (parent != null)
{
if (parent is T && (((T)parent).Name == name | string.IsNullOrEmpty(name)))
{
return (T)parent;
}
parent = VisualTreeHelper.GetParent(parent);
}
return null;
}
}
完整的参见这里。
BindDescriptionAttribute注解类
在调用web api从服务器端返回的数据中,需要在本地的WPF项目定义相关的实体类,并且在实体类的属性上标记绑定描述类(BindDescriptionAttribute),这个类直接描述了展面如何展示(一般用DataGrid,可按此思路扩展不规则表单),这也是WPF用户控件封装之前的准备工作。
/// <summary>
/// DataGrid绑定数据源描述
/// </summary>
public class BindDescriptionAttribute : Attribute
{
/// <summary>
/// 列名
/// </summary>
public string HeaderName { get; set; }
/// <summary>
/// 显示为
/// </summary>
public ShowScheme ShowAs { get; set; }
/// <summary>
/// 显示顺序
/// </summary>
public int DisplayIndex { get; set; }
/// <summary>
/// DataGrid列绑定属性名称
/// </summary>
public string PropertyName { get; set; }
/// <summary>
/// 应用内的容模板Key
/// </summary>
public string ResourceKey { get; set; }
/// <summary>
/// 列宽
/// </summary>
public DataGridLength Width { get; set; }
/// <summary>
/// 列宽ByGrid
/// </summary>
public GridLength CloumnWidth { get; set; }
/// <summary>
/// DataGrid绑定数据源描述
/// </summary>
/// <param name="headerName">列名</param>
/// <param name="showAs">显示为</param>
/// <param name="width">宽度</param>
/// <param name="displayIndex">显示顺序</param>
/// <param name="resourceKey">自定义列Key</param>
public BindDescriptionAttribute(string headerName, ShowScheme showAs = ShowScheme.普通文本, string width = "Auto", int displayIndex = 0, string resourceKey = "")
{
HeaderName = headerName;
DisplayIndex = displayIndex;
ResourceKey = resourceKey;
ShowAs = showAs;
var convert = new DataGridLengthConverter();
Width = (DataGridLength)convert.ConvertFrom(width);
var gridCOnvert = new GridLengthConverter();
CloumnWidth = (GridLength)gridCOnvert.ConvertFrom(width);
if (showAs == ShowScheme.自定义 && string.IsNullOrWhiteSpace(resourceKey))
throw new ArgumentException($"自定义列时需要指定{nameof(resourceKey)}参数!");
}
}
/// <summary>
/// 展示方式
/// </summary>
public enum ShowScheme
{
普通文本 = 1,
自定义 = 4
}
上方的枚举ShowScheme则描述了对应的列的显示方案,是该使用普通的文本还是加载数据模板(DataTemplate)。
如何使用DataGridEx实现动态表格功能
要使用自己扩展的动态DataGrid其实是跟使用常规的DataGrid是一样的,只是区别是绑定数据是使用DataSource属性而已,下面就是WPF用户控件封装之动态表格xaml,如下代码所示:
<Page
x:Class="JHRS.RegisterManagement.Views.RegisterList"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:prism="http://prismlibrary.com/"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:c="clr-namespace:JHRS.Core.Controls.Common;assembly=JHRS.Core"
xmlns:b="http://schemas.microsoft.com/xaml/behaviors"
prism:ViewModelLocator.AutoWireViewModel="True"
mc:Ignorable="d"
d:DesignHeight="450" d:DesignWidth="800"
x:Name="page"
Title="RegisterList" Background="White">
<b:Interaction.Triggers>
<b:EventTrigger EventName="Loaded" >
<b:InvokeCommandAction Command="{Binding LoadedCommand}" CommandParameter="{Binding ElementName=page}" />
</b:EventTrigger>
</b:Interaction.Triggers>
<Grid x:Name="maskContainer">
<c:DataGridEx DataSource="{Binding PageData}" IsReadOnly="True"/>
</Grid>
</Page>
上面代中<c:DataGridEx DataSource=”{Binding PageData}” IsReadOnly=”True”/>这行就是WPF用户控件封装的动态表格绑定数据的用法,而PageData则是来自ViewModel定义的一个IEnumerable<object>属性,只需要在当前页面(Page)的ViewModel里面调用接口获取数据给PageData赋值就可以了,如下代码所示:
/// <summary>
/// 綁定分頁數據
/// </summary>
[WaitComplete]
protected async override Task<object> BindPagingData()
{
List<Account> list = new List<Account>();
for (int i = 0; i < 15; i++)
{
list.Add(new Account
{
Name = "趙佳仁" + i,
RegTime = DateTime.Now.AddDays(i),
RoleName = "管理員" + i,
Title = "無職" + i,
UserID = 100 + i
});
}
PageData = list;
await Task.Delay(200);
return true;
}
而Account类则是这样定义的。
public class Account
{
[BindDescription("用戶ID")]
public int UserID { get; set; }
[BindDescription("用戶名")]
public string Name { get; set; }
[BindDescription("註冊時間")]
public DateTime RegTime { get; set; }
[BindDescription("角色名穩")]
public string RoleName { get; set; }
[BindDescription("職級")]
public string Title { get; set; }
}
完整的代码参见这里。下图是最终的效果:
WPF用户控件封装
Combobox扩展控件
原生的Combobox是WPF提供的下拉框控件,如果约定在整个系统里面,所有的下拉框控件默认项为请选择,如下图所示:
统一的给加上这个的话,在框架中是这样做的,先自定义一个BaseComboBox类,继承自ComboBox类,并在代码里面添加一个默认项,代码如下:
using JHRS.Http;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
namespace JHRS.Core.Controls.Common
{
/// <summary>
/// 下拉框控件基类
/// </summary>
public abstract class BaseComboBox : ComboBox
{
/// <summary>
/// 下拉框数据源
/// </summary>
public IList Data
{
get { return (IList)GetValue(DataProperty); }
set
{
AddDefault(value);
SetValue(DataProperty, value);
}
}
/// <summary>
/// 已登录获取到Token客户端对象
/// </summary>
protected HttpClient AuthClient => AuthHttpClient.Instance;
/// <summary>
/// 服务器配置
/// </summary>
protected string BaseUrl => AuthHttpClient.Instance.BaseAddress!.ToString();
// Using a DependencyProperty as the backing store for Data. This enables animation, styling, binding, etc...
public static readonly DependencyProperty DataProperty =
DependencyProperty.Register("Data", typeof(IList), typeof(BaseComboBox), new PropertyMetadata(null, (d, e) =>
{
BaseComboBox c = (BaseComboBox)d;
var list = e.NewValue as IList;
if (list != null)
c.AddDefault(list);
c.Data = list;
c.ItemsSource = list;
}));
/// <summary>
/// 构造函数
/// </summary>
public BaseComboBox()
{
this.Initialized += OnInitialized;
}
/// <summary>
/// 下拉框初始化事件,子类实现,可以加载各自数据。
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected abstract void OnInitialized(object sender, EventArgs e);
private string DefaultSelectedValue = "-1";
private string DefaultSelectedText = "—請選擇—";
/// <summary>
/// 添加默认项:请选择
/// </summary>
/// <param name="data"></param>
private void AddDefault(IList data)
{
if (data == null || data.Count == 0) return;
var pros = data[0].GetType().GetProperties();
bool hasSelect = false;
var s = pros.FirstOrDefault(x => x.Name == SelectedValuePath);
var d = pros.FirstOrDefault(x => x.Name == DisplayMemberPath);
if (s == null) throw new Exception("未給ComboBox指定SelectedValuePath屬性,注意:屬性區分大小寫!");
if (d == null) throw new Exception("未给ComboBox指定DisplayMemberPath屬性,注意:屬性區分大小寫!");
foreach (var item in data)
{
if (s == d && (s.GetValue(item, null) + "") == DefaultSelectedText)
{
hasSelect = true;
break;
}
else if ((s.GetValue(item, null) + "") == DefaultSelectedValue && (d.GetValue(item, null) + "") == DefaultSelectedText)
{
hasSelect = true;
break;
}
}
if (hasSelect == false)
{
var subType = data.GetType().GenericTypeArguments[0];
if (subType.Name.StartsWith("<>f__AnonymousType")) return;
var m = Activator.CreateInstance(subType);
if (s != d)
{
s.SetValue(m, Convert.ChangeType(DefaultSelectedValue, s.PropertyType), null);
d.SetValue(m, Convert.ChangeType(DefaultSelectedText, d.PropertyType), null);
}
else
{
d.SetValue(m, Convert.ChangeType(DefaultSelectedText, d.PropertyType), null);
}
data.Insert(0, m);
}
}
}
}
上面的就是完整代码,需要注意的是,在上面的代码中,处理匿名类型有Bug,并没有修复,强类型的绑定是会添加【—請選擇—】这个默认项的。
业务相关的ComboBox下拉框
在实际项目里面,会有很多下拉框的数据源是需要调用接口获取的,将它封装后就可以避免在很多的功能页面(Page)或者控件里面再调接口来获取数据给ComboBox绑定数据,因此封装后直接拖过去用就完事了,这是WPF用户控件封装之下拉框。
在框架里面封装了像科室,字典,通用业务状态的下拉框,这里只放一个科室的下拉框示例代码,因为科室是需要调接口获取的,下方注释掉的WPF用户控件封装代码就是真实项目中调用接口获取数据来绑定的代码。
using JHRS.Core.Controls.Common;
using JHRS.Core.Models;
using System;
using System.Collections.Generic;
namespace JHRS.Core.Controls.DropDown
{
/// <summary>
/// 科室下拉框
/// </summary>
public class DepartmentComboBox : BaseComboBox
{
/// <summary>
/// 初始化科室數據,可調用接口獲取數據。
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected override void OnInitialized(object sender, EventArgs e)
{
this.DisplayMemberPath = "Name";
this.SelectedValuePath = "Id";
//var response = await RestService.For<IDepartmentApi>(AuthHttpClient.Instance).GetAll();
//if (response.Succeeded)
//{
// Data = response.Data as IList;
//}
List<DepartmentOutputDto> list = new List<DepartmentOutputDto>();
for (int i = 0; i < 20; i++)
{
list.Add(new DepartmentOutputDto
{
Id = i + 1,
Name = $"測試科室{i + 1}"
});
}
base.Data = list;
}
}
}
封装后下拉框怎样使用
如下图所示一样,在演示框架中,WPF用户控件封装之后的控件是直接将其拖到用户控件相关位置,然后绑定你需要获取的值即可,使用的地方不需要关注科室的数据从哪儿来的,你只需要知道你用什么属性取接收选中的值即可。
以上就是使用的方法,接下来看看如何封装分页表格。
动态分页表格
每个系统里面分页表格是大头,或者说是比较复杂的功能,而在框架里面是将表格和分页控件封装到一起形成一个用户控件,在需要使用的地方,也是直接拖过去,并调用分页接口获取数据绑定即可;WPF用户控件封装表格的每一列展示什么数据,也是采用最上面介绍的最基础的动态表格思想解决的。
分页表格控件XAML代码
<UserControl x:Class="JHRS.Core.Controls.DataGrids.PagingDataGrid"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:b="http://schemas.microsoft.com/xaml/behaviors"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:hc="https://handyorg.github.io/handycontrol"
xmlns:local="clr-namespace:JHRS.Core.Controls.DataGrids"
Loaded="UserControl_Loaded">
<Grid Name="ucDataGrid">
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition Height="5"/>
<RowDefinition Height="30"/>
</Grid.RowDefinitions>
<DataGrid x:Name="pagingDataList" Grid.Row="0" IsReadOnly="True"
ItemsSource="{Binding PageData}" CanUserAddRows="False" SelectionMode="Single"
LoadingRow="pagingDataList_LoadingRow">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Header, RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}, Mode=FindAncestor}}" CanUserSort="False" Header="序号" IsReadOnly="True" Width="40"/>
<DataGridTemplateColumn Width="40" x:Name="isCheckbox">
<DataGridTemplateColumn.Header>
<CheckBox Click="CheckBox_Click"></CheckBox>
</DataGridTemplateColumn.Header>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<CheckBox Click="chkItem_Click" x:Name="chkItem" VerticalAlignment="Center" HorizontalAlignment="Center"></CheckBox>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
<hc:Pagination x:Name="ucPagination" Grid.Row="2" HorizontalAlignment="Right" MaxPageCount="{Binding PagingData.MaxPageCount}" PageIndex="{Binding PagingData.PageIndex, Mode=TwoWay}">
<b:Interaction.Triggers>
<b:EventTrigger EventName="PageUpdated" >
<b:InvokeCommandAction Command="{Binding ChangePageIndexCommand}"/>
</b:EventTrigger>
</b:Interaction.Triggers>
</hc:Pagination>
</Grid>
</UserControl>
在这个WPF用户控件封装的xaml代码中,主要放了两个控件,一个DataGrid表格控件,一个Pagination分页控件。后台的C#代码如下:
using JHRS.Core.Extensions;
using JHRS.Filter;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace JHRS.Core.Controls.DataGrids
{
/// <summary>
/// PagingDataGrid.xaml 的交互逻辑
/// </summary>
public partial class PagingDataGrid : UserControl
{
public PagingDataGrid()
{
InitializeComponent();
pagingDataList.AutoGenerateColumns = false;
}
/// <summary>
/// 生成序号
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void pagingDataList_LoadingRow(object sender, DataGridRowEventArgs e)
{
if (EnablePagination)
//需要分页
e.Row.Header = (PagingData.PageIndex - 1) * PagingData.PageSize + e.Row.GetIndex() + 1;
else
//不需要分页
e.Row.Header = e.Row.GetIndex() + 1;
}
/// <summary>
/// 表格数据源
/// </summary>
public IEnumerable<object> PageData
{
get { return (IEnumerable<object>)GetValue(PageDataProperty); }
set { SetValue(PageDataProperty, value); }
}
//是否已经生成了列并建立了绑定关系
private bool IsGenerateColumns = false;
// Using a DependencyProperty as the backing store for PageData. This enables animation, styling, binding, etc...
public static readonly DependencyProperty PageDataProperty =
DependencyProperty.Register("PageData", typeof(IEnumerable<object>), typeof(PagingDataGrid), new PropertyMetadata((d, e) =>
{
PagingDataGrid pagingDataGrid = d as PagingDataGrid;
if (pagingDataGrid.IsGenerateColumns) return;
int num = 0;
if (pagingDataGrid.EnableRowNumber) num++;
if (pagingDataGrid.EnableCheckBoxColumn) num++;
pagingDataGrid.pagingDataList.GenerateColumns(num, e.NewValue, pagingDataGrid.OperatingKey, pagingDataGrid.OperatingWidth);
pagingDataGrid.IsGenerateColumns = true;
}));
/// <summary>
/// 分页控件数据源
/// </summary>
public PagingData PagingData
{
get { return (PagingData)GetValue(PagingDataProperty); }
set { SetValue(PagingDataProperty, value); }
}
// Using a DependencyProperty as the backing store for PagingData. This enables animation, styling, binding, etc...
public static readonly DependencyProperty PagingDataProperty =
DependencyProperty.Register("PagingData", typeof(PagingData), typeof(PagingDataGrid));
/// <summary>
/// 是否启用分页功能
/// </summary>
public bool EnablePagination { get; set; } = true;
/// <summary>
/// 是否启用序号
/// </summary>
public bool EnableRowNumber { get; set; } = true;
/// <summary>
/// 是否复选框列
/// </summary>
public bool EnableCheckBoxColumn { get; set; } = false;
/// <summary>
/// 复选框列是否启用全选功能
/// </summary>
public bool EnableSelectAll { get; set; } = false;
/// <summary>
/// 操作列的Key
/// </summary>
public string OperatingKey { get; set; }
/// <summary>
/// 操作列宽
/// </summary>
public DataGridLength OperatingWidth { get; set; }
/// <summary>
/// 当前选中数据
/// </summary>
public IEnumerable<object> CheckedList
{
get { return (IEnumerable<object>)GetValue(SelectedListProperty); }
set { SetValue(SelectedListProperty, value); }
}
// Using a DependencyProperty as the backing store for SelectedList. This enables animation, styling, binding, etc...
public static readonly DependencyProperty SelectedListProperty =
DependencyProperty.Register("CheckedList", typeof(IEnumerable<object>), typeof(PagingDataGrid),
new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault));
/// <summary>
/// 初始化表格行为
/// </summary>
private void InintBehavior()
{
if (!EnablePagination) ucDataGrid.Children.Remove(ucPagination);
if (!EnableRowNumber) pagingDataList.Columns.Remove(pagingDataList.Columns.FirstOrDefault(x => x.Header.ToString() == "序号"));
if (!EnableCheckBoxColumn) pagingDataList.Columns.Remove(isCheckbox);
if (!EnableSelectAll) isCheckbox.Header = "选择";
}
/// <summary>
/// 用户控件初始化
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
InintBehavior();
}
/// <summary>
/// 复选框全选事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void CheckBox_Click(object sender, RoutedEventArgs e)
{
var c = sender as CheckBox;
CheckedAll(pagingDataList, c.IsChecked);
CheckedList = GetSelected();
}
/// <summary>
/// 全选
/// </summary>
/// <param name="parent"></param>
/// <param name="isChecked"></param>
private void CheckedAll(DependencyObject parent, bool? isChecked)
{
int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < numVisuals; i++)
{
DependencyObject v = VisualTreeHelper.GetChild(parent, i);
CheckBox child = v as CheckBox;
if (child == null)
{
CheckedAll(v, isChecked);
}
else
{
child.IsChecked = isChecked;
break;
}
}
}
/// <summary>
/// 获取所有选中项
/// </summary>
/// <returns></returns>
private List<object> GetSelected()
{
List<object> list = new List<object>();
foreach (var item in pagingDataList.ItemsSource)
{
var m = isCheckbox.GetCellContent(item);
var c = m.GetChildObject<CheckBox>("chkItem");
if (c != null && c.IsChecked == true)
{
list.Add(item);
}
}
return list;
}
/// <summary>
/// 单击选中事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void chkItem_Click(object sender, RoutedEventArgs e)
{
CheckedList = GetSelected();
}
}
}
如何使用动态分页表格
在需要使用的页面(Page)或者控件里面,将WPF用户控件封装后的控件拖进来就可以了,完整的xaml代码如下
<Page x:Class="JHRS.OutpatientSystem.Views.Reservation"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:JHRS.OutpatientSystem.Views"
xmlns:prism="http://prismlibrary.com/"
xmlns:b="http://schemas.microsoft.com/xaml/behaviors"
prism:ViewModelLocator.AutoWireViewModel="True"
xmlns:f="clr-namespace:JHRS.Core.Controls.Layouts;assembly=JHRS.Core"
xmlns:p="clr-namespace:JHRS.Core.Controls.DataGrids;assembly=JHRS.Core"
xmlns:c="clr-namespace:JHRS.Core.Controls.DropDown;assembly=JHRS.Core"
x:Name="page"
Title="Reservation" Background="#FFFFFFFF">
<b:Interaction.Triggers>
<b:EventTrigger EventName="Loaded" >
<b:InvokeCommandAction Command="{Binding LoadedCommand}" CommandParameter="{Binding ElementName=page}" />
</b:EventTrigger>
</b:Interaction.Triggers>
<Page.Resources>
<DataTemplate x:Key="Status">
<c:StatusComboBox Name="cboStatus" SelectedValue="{Binding Status, Mode=TwoWay, UpdateSourceTrigger=Explicit,Converter={StaticResource EnumToIntConverter}}">
<b:Interaction.Triggers>
<b:EventTrigger EventName="SelectionChanged" >
<b:InvokeCommandAction Command="{Binding DataContext.SelectionChangedCommand,RelativeSource={RelativeSource AncestorType=Page}}" CommandParameter="{Binding ElementName=cboStatus}"/>
</b:EventTrigger>
</b:Interaction.Triggers>
</c:StatusComboBox>
</DataTemplate>
<DataTemplate x:Key="OperationKey">
<StackPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center">
<Button Name="btnEdit" Content="編輯" Background="#00FFFFFF" Style="{StaticResource MaterialDesignOutlinedButton}" Command="{Binding DataContext.EditCommand, RelativeSource={RelativeSource AncestorType=Page}}" CommandParameter="{Binding Path=DataContext, ElementName=btnEdit}" />
<Button Name="btnView" Content="詳情" Margin="10,0,0,0" ToolTip="详情" Command="{Binding DataContext.ViewDetailsCommand, RelativeSource={RelativeSource AncestorType=Page}}" CommandParameter="{Binding Path=DataContext, ElementName=btnView}" />
</StackPanel>
</DataTemplate>
</Page.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="50" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid VerticalAlignment="Top">
<f:FunctionArea AddButtonText="新增預約" />
</Grid>
<Grid Name="maskContainer" Row="1">
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition Height="5" />
<RowDefinition Height="30" />
</Grid.RowDefinitions>
<p:PagingDataGrid Name="ucDataGrid" OperatingKey="OperationKey" OperatingWidth="150*" EnableSelectAll="True" PageData="{Binding PageData}" PagingData="{Binding PagingData}" />
</Grid>
</Grid>
</Page>
上面代码中<p:PagingDataGrid Name=”ucDataGrid” OperatingKey=”OperationKey” OperatingWidth=”150*” EnableSelectAll=”True” PageData=”{Binding PageData}” PagingData=”{Binding PagingData}” />就是应用动态分页表格的方法,注意绑定数据是你封装的用户控件的PageData依赖属性,而里面绑定的数据源PageData则是ViewModel基类定义的分页数据属性,需要在各子类的ViewModel里面调用接口赋值,如下代码所示:
/// <summary>
/// 綁定分頁數據
/// </summary>
[WaitComplete]
protected async override Task<object> BindPagingData()
{
var request = this.GetQueryRules(Query);
var response = await RestService.For<IReservationApi>(AuthClient).GetPageingData(request);
if (response.Succeeded)
{
PageData = response.Data.Rows;
this.PagingData.Total = response.Data.Total;
}
return response;
}
总结一下
合理的进行WPF用户控件封装,可以减少很多重复的代码,本文阐述了怎样封装用户控件的思想,实际项目中,可以结合团队情况和项目状况来封装,总之身处IT江湖,名正言顺的偷偷懒也是向老板多要工资的理由,因为你干活又快又好,哪个包工头不喜欢呢?
下一篇将介绍一下在团队开发中,关于目录文件遵循的一些原则,如果有更好的方式,也欢迎大家提出来。
- 开源地址:https://github.com/jhrscom/jhrs
- 官方博客:https://jhrs.com
本系列相关阅读
- WPF企业级开发框架搭建指南(启示录)
- JHRS开发框架之基础类库
- JHRS开发框架之第三方框架选型
- JHRS开发框架之WPF调用Web API封装
- JHRS开发框架之客户端入口项目
- JHRS开发框架之各子系统如何整合
- JHRS开发框架之怎样设计合理的ViewModel基类
- JHRS开发框架之公用组件用户控件的封装
- JHRS开发框架之建议遵循的一些建目录文件原则
- JHRS开发框架之WPF数据验证
- JHRS开发框架之ViewModel相互传参和弹框回传参的解决办法
- JHRS开发框架之踩坑记(终章)
最后
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