C#实战之备忘录的制作详解
时间：2022-09-02 08:38:08 | 栏目：.NET代码 | 点击：次
1.概述
前几天群里有人问如何制作备忘录，感觉这样一个小实例挺适合新手们入门学习使用，所以就抽空做了出来。界面如下图
这个备忘录主要包括了如下功能：
① 备忘录信息的增、删、改、查；
② 备忘录时间到了以后进行语音播报。
功能很简单，但是要实现这么一个功能，也涉及众多的知识点，接下来详细进行分解。
2.内容详述
①界面button的图标
图标图片可以上网上下载，下载好以后放到项目目录中，然后在项目中找到你的图片——>右键包括在项目中——>再右键，点击属性：
复制到输出目录，更改为始终复制。
生成操作，更改为内容。
前台XMAL操作：
<Button Margin="15,5" MinWidth="60" cal:Message.Attach="[Event Click] = [Action SearchClick]" >
<WrapPanel >
<Image Source="/Images/search.png" Width="15" Height="15" />
<TextBlock Text="查找" VerticalAlignment="Center" />
</WrapPanel>
</Button>
② 数据源：这里我采用从xml读取并绑定到界面，界面如果有修改，在页面退出时进行数据保存，当然你也可以使用数据库去操作
XML文件位置：根目录的RawData下
XML文件数据内容如下：
MemorandumModel数据模型定义：
public class MemorandumModel
{
public string Title { get; set; }
public EvenType EvenType { get; set; }
public DateTime DateTime { get; set; }
public bool IsComplete { get; set; }
}
③XML文件的读取和保存：MemorandumRealList是我们所有数据的集合，为了方便界面查询，界面绑定了MemorandumShowList 这个集合
xml读取：
public void XmlDocReader()
{
//XmlDocument读取xml文件
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(XmlDocPath);
//获取xml根节点
XmlNode xmlRoot = xmlDoc.DocumentElement;
if (xmlRoot == null)
return;
//读取所有的节点
foreach (XmlNode node in xmlRoot.SelectNodes("MemorandumModel"))
{
MemorandumRealList.Add(new MemorandumModel()
{
Title = node.SelectSingleNode("Title").InnerText,
EvenType = (EvenType)Enum.Parse(typeof(EvenType), node.SelectSingleNode("EvenType").InnerText),
DateTime = Convert.ToDateTime(node.SelectSingleNode("DateTime").InnerText),
IsComplete = Convert.ToBoolean(node.SelectSingleNode("IsComplete").InnerText)
});
}
MemorandumShowList = new ObservableCollection<MemorandumModel>(MemorandumRealList);
}
xml文件保存：
public void SaveXmlDoc()
{
//获取根节点对象
XDocument document = new XDocument();
XElement xmlRoot = new XElement("MemorandumModels");
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XElement memorandumModel;
foreach (var memorandumReal in MemorandumRealList)
{
memorandumModel = new XElement($"MemorandumModel");
memorandumModel.SetElementValue("Title", memorandumReal.Title);
memorandumModel.SetElementValue("EvenType", memorandumReal.EvenType);
memorandumModel.SetElementValue("DateTime", memorandumReal.DateTime);
memorandumModel.SetElementValue("IsComplete", memorandumReal.IsComplete);
xmlRoot.Add(memorandumModel);
}
xmlRoot.Save(XmlDocPath);
}
④查询：如果全选选中，则显示全部内容，未勾选，则采用link去匹配选中信息去筛选，我这里是所有信息去匹配的，你也可以自己修改下，去只匹配某一项或几项内容
public void SearchClick()
{
SaveXmlDoc();
if (SelectAll)
{
MemorandumShowList = new ObservableCollection<MemorandumModel>(MemorandumRealList);
return;
}
MemorandumShowList = new ObservableCollection<MemorandumModel>(
MemorandumRealList.Where(
t => t.EvenType == EvenTypeList[SelectedIndex]
).Where(s => s.IsComplete == IsCompleteStatus
).Where(p => p.Title == TitleText
).Where(x => x.DateTime == DateTime.Parse(DataTimeContext)
) .ToList() );
}
⑤标题栏未输入内容时显示灰色提示字体，有输入时输入内容显示黑色字体：
这里采用事件处理：获取到光标时
public void LostFocus()
{
if (string.IsNullOrEmpty(TitleText))
{
TitleText = "备忘录标题";
TitleColor = Color.DimGray;
}
}
光标离开时：
public void GotFocus()
{
TitleText = "";
TitleColor = Color.Black;
}
⑥选中行删除：
public void DeleteClick()
{
MemorandumRealList.Remove(SelectedItem);
MemorandumShowList.Remove(SelectedItem);
}
⑦行号获取：在行选择改变事件中去做
public void GridControl_SelectedItemChanged(object sender, SelectedItemChangedEventArgs e)
{
GridControl gd = sender as GridControl;
SelectRow = gd.GetSelectedRowHandles()[0];//选中行的行号
}
⑧添加信息：
public void Add()
{
MemorandumRealList.Add(new MemorandumModel()
{
Title = titleText,
DateTime =DateTime.Parse(DataTimeContext),
EvenType = EvenTypeList[SelectedIndex],
IsComplete = IsCompleteStatus
});
MemorandumShowList.Add(new MemorandumModel()
{
Title = titleText,
DateTime = DateTime.Parse(DataTimeContext),
EvenType = EvenTypeList[SelectedIndex],
IsComplete = IsCompleteStatus
});
}
⑨修改信息：
public void Modify()
{
MemorandumRealList[SelectRow] = new MemorandumModel()
{
Title = titleText,
DateTime = DateTime.Parse(DataTimeContext),
EvenType = EvenTypeList[SelectedIndex],
IsComplete = IsCompleteStatus
};
MemorandumShowList[SelectRow] = new MemorandumModel()
{
Title = titleText,
DateTime = DateTime.Parse(DataTimeContext),
EvenType = EvenTypeList[SelectedIndex],
IsComplete = IsCompleteStatus
};
}
⑩定时器查询：采用using System.Threading.Tasks;下的单线程定时器DispatcherTimer，
定义和初始化：
private DispatcherTimer timer;
timer = new DispatcherTimer();
timer.Interval = TimeSpan.FromMinutes(1);
timer.Tick += timer1_Tick;
timer.Start();
定时器事件：我这里每隔一分钟查询一次，查询到当前事件到了提醒时间就进行一次语音播报：
private void timer1_Tick(object sender, EventArgs e)
{
foreach (var memorandum in MemorandumRealList)
{
if(DateTime.Now >= memorandum.DateTime)
{
SpeakAsync(memorandum.Title);
}
}
}
⑩①：语音播报：这里开了task线程执行
/// <summary>
/// 微软语音识别
/// </summary>
/// <param name="content">提示内容</param>
public static void SpeakAsync(string content)
{
try
{
Task.Run(() =>
{
SpVoice voice = new SpVoice();
voice.Rate = 1;//速率[-10,10]
voice.Volume = 10;//音量[0,100]
voice.Voice = voice.GetVoices().Item(0);//语音库
voice.Speak(content);
});
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}
catch (Exception ex)
{
throw ex;
}
}
⑩② 界面时间处理：
界面的表格采用的dev控件gridcontrol，默认情况下，时间只显示年月日，如果需要显示时分，需要设定：EditSettings如下
<dxg:GridColumn Header="提醒时间" FieldName="DateTime" MinWidth="120" >
<dxg:GridColumn.EditSettings>
<!--<xctk:DateEditSettings DisplayFormat="dd-MM-yyyy HH:mm:ss.fff"/>-->
<xctk:DateEditSettings DisplayFormat="yyyy-MM-dd HH:mm"/>
</dxg:GridColumn.EditSettings>
</dxg:GridColumn>
如果使用的是wpf 自带的表格控件datagrid，相对好处理
<DataGridTextColumn Header="提醒时间" Binding="{Binding Path=DateTime,StringFormat='yyyy年MM月dd日 HH:mm:ss'}" MinWidth="300" />
界面顶端的时间控件采用：toolkit下的xctk1:DateTimeUpDown这个控件，她绑定的是一个字符串类型的数据，所以添加时候，需要将他转换为datetime类型， DateTime.Parse(DataTimeContext)，或者DateTime = Convert.ToDateTime(DataTimeContext)
<xctk1:DateTimeUpDown x:Name="_minimum" Format="Custom" FormatString="yyyy/MM/dd HH:mm"
Text="{Binding DataTimeContext}"
HorizontalAlignment="Left" VerticalAlignment="Center"
Value="2016/01/01T12:00" Margin="15,5"/>
⑩③combobox枚举内容绑定：
public ObservableCollection<EvenType> EvenTypeList { get; set; } = new ObservableCollection<EvenType>();
foreach (EvenType evenType in Enum.GetValues(typeof(EvenType)))
{
EvenTypeList.Add(evenType);
}
⑩④关于gridcontrol TableView 的常用属性介绍
TableView 的常用属性： ? AllowPerPixelScrolling //逐像素滚动； AllowScrollAnimation //滚动动画，当下拉滚动条时有动画效果 NavigationStyle //选中方式是一行还是单元格 ShowIndicator //是否在每一行之前显示小方块 UseEvenRowBackground //隔行其背景颜色会有所区分 AllowScrollToFocusedRow //允许滚动到选中行 AllowResizing //允许调整尺寸 AllowSorting //允许排序 AutoWidth //允许自动调整列宽 AllowMoveColumnToDropArea //允许将一列拖到空白处进行分组 AllowGrouping //允许分组 AllowFilterEditor //允许显示过滤盘 AllowEditing //允许编辑 ShowGroupPanel//显示分组panel ShowHorizontalLines ShowVerticalLines //显示表格中每行每列垂直和水平线 IsColumnMenuEnabled //是否关闭右键列菜单
3.前台代码
直接上代码，比较简单，不展开讲解了：
<UserControl
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:Caliburn.Micro.Hello"
xmlns:cal="http://www.caliburnproject.org"
xmlns:sys="clr-namespace:System;assembly=mscorlib"
xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid" xmlns:xctk="http://schemas.devexpress.com/winfx/2008/xaml/editors" xmlns:xctk1="http://schemas.xceed.com/wpf/xaml/toolkit" x:Class="Caliburn.Micro.Hello.MemorandumView"
mc:Ignorable="d"
d:DesignHeight="450" d:DesignWidth="800" >
<UserControl.Resources>
<local:FontColorConverter x:Key="FontColorConverter" />
<Style TargetType="{x:Type TextBox}">
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="Width" Value="100"/>
</Style>
<Style TargetType="{x:Type CheckBox}">
<Setter Property="HorizontalAlignment" Value="Center"/>
<Setter Property="VerticalAlignment" Value="Center"/>
<Setter Property="Foreground" Value="Black"/>
</Style>
<Style TargetType="Button">
<Setter Property="Foreground" Value="Black"/>
</Style>
<DataTemplate x:Key="rowIndicatorContentTemplate">
<StackPanel VerticalAlignment="Stretch"
HorizontalAlignment="Stretch">
<TextBlock Text="{Binding RowHandle.Value}"
TextAlignment="Center"
Foreground="Black"/>
</StackPanel>
</DataTemplate>
</UserControl.Resources>
<StackPanel Orientation="Vertical">
<StackPanel Orientation="Horizontal">
<TextBox Text="{Binding TitleText}" Margin="15,5"
cal:Message.Attach="[Event GotFocus] = [Action GotFocus];[Event LostFocus] = [Action LostFocus]"
Foreground="{Binding TitleColor, Converter={StaticResource FontColorConverter}}"/>
<ComboBox ItemsSource="{Binding EvenTypeList}" Margin="15,5" SelectedIndex="{Binding SelectedIndex}" MinWidth="100" Foreground="Black"/>
<!--<DatePicker Text="{Binding DataTimeContext,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"
SelectedDate="{x:Static sys:DateTime.Now}"
HorizontalAlignment="Left" VerticalAlignment="Center" Margin="15,5" />-->
<xctk1:DateTimeUpDown x:Name="_minimum" Format="Custom" FormatString="yyyy/MM/dd HH:mm"
Text="{Binding DataTimeContext}"
HorizontalAlignment="Left" VerticalAlignment="Center"
Value="2016/01/01T12:00" Margin="15,5"/>
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<CheckBox IsChecked="{Binding IsCompleteStatus}" Margin="15,5" Content="是否完成" Foreground="Black"/>
<Button Margin="15,5" MinWidth="60" cal:Message.Attach="[Event Click] = [Action SearchClick]" >
<WrapPanel >
<Image Source="/Images/search.png" Width="15" Height="15" />
<TextBlock Text="查找" VerticalAlignment="Center" />
</WrapPanel>
</Button>
</StackPanel>
<Border BorderBrush="LightBlue" CornerRadius="2" BorderThickness="2" >
<dxg:GridControl AutoGenerateColumns="AddNew" EnableSmartColumnsGeneration="True" AllowLiveDataShaping="True"
cal:Message.Attach="[Event SelectedItemChanged] = [Action GridControl_SelectedItemChanged($source,$event)];"
ItemsSource="{Binding MemorandumShowList}" SelectedItem="{Binding SelectedItem}"
Height="330" Foreground="Black">
<dxg:GridControl.View>
<dxg:TableView ShowTotalSummary="True" AllowMoveColumnToDropArea="False"
AllowGrouping="False" AutoExpandOnDrag="False"
ShowDragDropHint="False" ShowGroupPanel="False"
AllowColumnMoving="False" AllowResizing="False" Foreground="Black"
RowIndicatorContentTemplate="{StaticResource rowIndicatorContentTemplate}" />
</dxg:GridControl.View>
<dxg:GridColumn Header="标题" FieldName="Title" MinWidth="100"/>
<dxg:GridColumn Header="类型" FieldName="EvenType" MinWidth="100"/>
<dxg:GridColumn Header="提醒时间" FieldName="DateTime" MinWidth="120" >
<dxg:GridColumn.EditSettings>
<!--<xctk:DateEditSettings DisplayFormat="dd-MM-yyyy HH:mm:ss.fff"/>-->
<xctk:DateEditSettings DisplayFormat="yyyy-MM-dd HH:mm"/>
</dxg:GridColumn.EditSettings>
</dxg:GridColumn>
<dxg:GridColumn Header="状态" FieldName="IsComplete" MinWidth="100"/>
</dxg:GridControl>
</Border>
<StackPanel Orientation="Horizontal">
<CheckBox IsChecked="{Binding SelectAll}" Margin="35,5" Content="全选"/>
<Button Margin="35,5" MinWidth="60" cal:Message.Attach="[Event Click] = [Action DeleteClick]" >
<WrapPanel >
<Image Source="/Images/delete.png" Width="15" Height="15" />
<TextBlock Text="删除" VerticalAlignment="Center" />
</WrapPanel>
</Button>
<Button Margin="35,5" MinWidth="60" Name="Add">
<WrapPanel >
<Image Source="/Images/add.png" Width="15" Height="15" />
<TextBlock Text="添加" VerticalAlignment="Center" />
</WrapPanel>
</Button>
<Button Margin="35,5" MinWidth="60" Name="Modify">
<WrapPanel >
<Image Source="/Images/modify.png" Width="15" Height="15"/>
<TextBlock Text="修改" VerticalAlignment="Center" />
</WrapPanel>
</Button>
</StackPanel>
</StackPanel>
</UserControl>
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4.效果演示
