WPF项目学习.三

Posted 叶耶①

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工具代码记录

版权声明:本文为博主初学经验,未经博主允许不得转载。

一、前言

   记录在学习与制作WPF过程中遇到的解决方案。

   分页控件的制作,邮件发送,站点请求代码,excel导入导出等代码的实现过程;

 

二、配置

系统环境:win10

开发工具:Visual Studio 2017

开发语言:C#.WPF (MVVM框架)

 

三、功能

  1. 分页控件的制作

1.1 前端xaml代码

<UserControl x:Class="SCB.RPS.Client.Controls.UcPager"
  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:SCB.RPS.Client.Controls"
  mc:Ignorable="d" >
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition />
            <ColumnDefinition Width="20" />
            <ColumnDefinition />
            <ColumnDefinition Width="20" />
            <ColumnDefinition />
            <ColumnDefinition Width="20" />
            <ColumnDefinition />
            <ColumnDefinition />
        </Grid.ColumnDefinitions>
        <StackPanel Grid.Column="0" Orientation="Horizontal">
            <Label Content="每页显示"/>
            <ComboBox Text="{Binding PagerSize}" 
            Foreground="Orange" VerticalContentAlignment="Center"> <ComboBoxItem Content="10"/> <ComboBoxItem Content="20"/> <ComboBoxItem Content="50"/> </ComboBox> <Label Content=""/> </StackPanel> <StackPanel Grid.Column="2" Orientation="Horizontal"> <Label Content="当前显示数目:"/> <Label Content="{Binding PagerRecord}" Foreground="Orange"/> </StackPanel> <StackPanel Grid.Column="4" Orientation="Horizontal"> <Label Content="查询总量:"/> <Label Content="{Binding PagerQuantity}" Foreground="Orange"/> <Label Content="页,共"/> <Label Content="{Binding TotalRecord}" Foreground="Orange"/> <Label Content=""/> </StackPanel> <StackPanel Grid.Column="6"
            
Orientation="Horizontal" VerticalAlignment="Center"> <Button Content="首页" Width="40" Height="20"
            Template="{StaticResource DefaultButton}"
            Command="{Binding PagerFirst}"/> <Button Content="上页" Width="60" Height="20"
            Template="{StaticResource DefaultButton}"
            Command="{Binding PagerBefore}" /> <Label Content="{Binding PagerIndex}"
            Foreground="Orange" ToolTip="当前所在页码"/> <Button Content="下页" Width="60"
            Template="{StaticResource DefaultButton}"
            Command="{Binding PagerAfter}" /> <Button Content="末页" Width="40" Height="20"
            Template="{StaticResource DefaultButton}"
            Command="{Binding PagerEnd}" /> </StackPanel> </Grid> </UserControl>

 1.2 style代码

<ControlTemplate TargetType="{x:Type Button}" x:Key="DefaultButton">
   <Border BorderBrush="{TemplateBinding Control.BorderBrush}" 
       BorderThickness="0" Name="btn_modify_bg"> <Border.Background> <LinearGradientBrush EndPoint="0,1" StartPoint="0,0"> <GradientStop Color="#5CACEE" Offset="1.0" /> </LinearGradientBrush> </Border.Background>     <ContentPresenter Content="{TemplateBinding ContentControl.Content}"
          HorizontalAlignment="Center" VerticalAlignment="Center" />   </Border> <ControlTemplate.Triggers> <Trigger Property="UIElement.IsMouseOver" Value="True"> <Setter Property="Border.Background" TargetName="btn_modify_bg"> <Setter.Value> <LinearGradientBrush EndPoint="0,1" StartPoint="0,0"> <GradientStop Color="#1C86EE" Offset="0.0" /> </LinearGradientBrush> </Setter.Value> </Setter> </Trigger> <Trigger Property="ButtonBase.IsPressed" Value="True"> <Setter Property="UIElement.Effect"> <Setter.Value> <DropShadowEffect BlurRadius="10" Color="#1C86EE"
                Direction="0" Opacity="0.6"
                RenderingBias="Performance" ShadowDepth="0" /> </Setter.Value> </Setter> </Trigger> </ControlTemplate.Triggers> </ControlTemplate>

1.3 ViewModel业务代码

/// 分页控件 页面模型
public class PagerViewModel : BindableBase
{
   //定义一个委托
   public delegate void PageChangedHandle(object sender);

   //上一页下一页的触发事件
   public event PageChangedHandle PageChanged;

   // 默认显示的页容量
   public static int DefaultSize = 20;

   public PagerViewModel()
   {
       PagerFirst = new RelayCommand(PageFirst);
       PagerBefore = new RelayCommand(PageBefore);
       PagerAfter = new RelayCommand(PageAfter);
       PagerEnd = new RelayCommand(PageEnd);
   }

   private int _pagerSize = DefaultSize; //每页容量
   private int _pagerIndex = 1; //第几页
   private int _pagerQuantity; //多少页
   private int _pagerRecord; //当前页大小
   private int _totalRecord; //总量多少

   // 每页容量
   public int PagerSize
   {
       get => _pagerSize;
       set
       {
           _pagerSize = value;
           RaisePropertyChanged();
       }
   }

   // 第几页
   public int PagerIndex
   {
       get => _pagerIndex;
       set
       {
            _pagerIndex = value;
            RaisePropertyChanged();
       }
   }

   // 总共有多少页
   public int PagerQuantity
   {
       get => _pagerQuantity;
       set
       {
            _pagerQuantity = value;
            RaisePropertyChanged();
       }
   }

   // 当前页有多少条数据
   public int PagerRecord
   {
       get => _pagerRecord;
       set
       {
            _pagerRecord = value;
            RaisePropertyChanged();
       }
   }

   // 查询记录的总量
   public int TotalRecord
   {
       get => _totalRecord;
       set
       {
            _totalRecord = value;
            RaisePropertyChanged();
       }
   }

   // 首页
   public RelayCommand PagerFirst { get; set; }

   // 上一页
   public RelayCommand PagerBefore { get; set; }

   // 下一页
   public RelayCommand PagerAfter { get; set; }

   // 末页
   public RelayCommand PagerEnd { get; set; }

   // 首页事件
   private void PageFirst()
   {
        PagerIndex = 1;
        PageChanged?.Invoke(1);
   }

   // 上一页事件
   private void PageBefore()
   {
        PagerIndex--;
        if (PagerIndex < 1)
        {
            PagerIndex = 1;
            MessageBoxHelper.ShowTips("已经是首页");
            return;
        }
        PageChanged?.Invoke(PagerIndex);
   }

   // 下一页事件
   private void PageAfter()
   {
        PagerIndex++;
        if (PagerIndex > PagerQuantity)
        {
            PagerIndex = PagerQuantity;
            MessageBoxHelper.ShowTips("已经是末页");
            return;
        }
        PageChanged?.Invoke(PagerIndex);
   }

   // 末页事件
   private void PageEnd()
   {
        PagerIndex = PagerQuantity;
        PageChanged?.Invoke(PagerQuantity);
   }

   // 重置分页数据
   public void ResetPage()
   {
        PagerIndex = 1;
        PagerSize = DefaultSize;
        PagerRecord = 0;
        PagerQuantity = 0;
        TotalRecord = 0;
   }
}

MessageBoxHelper.ShowTip 是我封装的弹框提示信息类,等价于MessageBox.Show,只是便于以后统一修改样式或者更改提示信息时的业务处理;

自定义控件不涉及业务逻辑代码,在业务场景使用的时候,需要返回当前页容量、查询总量和查询页数;

PagerView.PagerRecord = result.Count;
PagerView.TotalRecord = result.FirstOrDefault()?.TotalRecord ?? 0;
PagerView.PagerQuantity=PagerView.TotalRecord / PagerView.PagerSize + 1;

PageChanged是控件的委托方法,在调用该控件时,需绑定委托的事件;

//代码放置在类初始化事件中
PagerView.PageChanged += SearchPageData; //委托给分页控件的查询方法

可以增加比如缓存效果,点击下一页时保存当前页面数据到内存中,重新刷新再清理内存的数据;


  private Dictionary<int, List<BatchProductShiftModel>> _tempPage =

          new Dictionary<int, List<BatchProductShiftModel>>(); //列表内容

 private int _tempIndex = 1; //记录当前页

// 分页查询 [加了缓存效果,保存查过的页码数据]
// 缓存后,不会根据选择的页面大小进行调整
// 缓存已处理的数据,点击下一页时,查询总量会产生变化,因为根据条件查询,状态变了
public void SearchPageData(object str)
{
   //记录当前页面数据 _tempPage[_tempIndex]
= LstReceiveOrder.ToList();    //为下次点击分页操作做准备 在内存中记录当前页码
_tempIndex = PagerView.PagerIndex;//判断该页码是否已经在缓存中 if (_tempPage.ContainsKey(PagerView.PagerIndex)) { LstReceiveOrder.Clear();
     //清理后加载数据 LstReceiveOrder.AddRange(_tempPage[PagerView.PagerIndex]);
//汇总当前页数量
     PagerView.PagerRecord = LstReceiveOrder.Count; //清理下面明细页的列表内容
     OrderVolumes.Clear(); SelectItemOrder = string.Empty; } else SearchProductShiftData(false); }

LstReceiveOrder 是查询的列表数据;

SearchProductShifData 是查询数据的方法;具体代码不贴了;

OrderVolumes 是明细页,可以去掉该代码;

 

  2.中文转拼音代码

using System.Linq;
using System.Collections.Generic;
using System.Text.RegularExpressions;
using Microsoft.International.Converters.PinYinConverter;

namespace Common
{  
    public class PinyinResult
    {
        public List<string> FirstPingYin { get; set; }
        public List<string> FullPingYin { get; set; }
    }
    /// <summary>
    ///汉字转为拼音
    /// </summary>
    public static class PinYinHelper
    { 
        /// <summary>
        /// 汉字转为拼音
        /// </summary>
        /// <param name="str">需要转换的汉字</param>
        public static PinyinResult ToPinYin(string str)
        {
            var chs = str.ToCharArray(); 
            var totalPingYins = new Dictionary<int, List<string>>();
            for (int i = 0; i < chs.Length; i++)
            {
                var pinyins = new List<string>();
                var ch = chs[i];
                //是否是有效的汉字
                if (ChineseChar.IsValidChar(ch))
                {
                  var cc = new ChineseChar(ch);
                  pinyins = cc.Pinyins.Where(
            p => !string.IsNullOrWhiteSpace(p)).ToList(); } else pinyins.Add(ch.ToString()); //去除声调,转小写 pinyins = pinyins.ConvertAll(
            p => Regex.Replace(p, @"\\d", "").ToLower()); //去重 pinyins = pinyins.Where(p => !string.IsNullOrWhiteSpace(p))
                .Distinct().ToList();
if (pinyins.Any()) totalPingYins[i] = pinyins; } var result = new PinyinResult(); foreach (var pinyins in totalPingYins) { var items = pinyins.Value; if (result.FullPingYin==null||result.FullPingYin.Count<=0) { result.FullPingYin = items; result.FirstPingYin = items.ConvertAll(
                    p => p.Substring(0, 1))
                    .Distinct().ToList(); }
else { //全拼循环匹配 var newTotalPingYins = new List<string>(); foreach (var totalPingYin in result.FullPingYin) { newTotalPingYins.AddRange(
                items.Select(item
=>totalPingYin+item)); } newTotalPingYins = newTotalPingYins.Distinct().ToList(); result.FullPingYin = newTotalPingYins; //首字母循环匹配 var newFirstPingYins = new List<string>(); foreach (var firstPingYin in result.FirstPingYin) { newFirstPingYins.AddRange(
             items.Select(item
=>firstPingYin + item.Substring(0, 1))); } newFirstPingYins = newFirstPingYins.Distinct().ToList(); result.FirstPingYin = newFirstPingYins; } } return result; } } }

 

  3.站点请求代码

//添加引用Newtonsoft.Json.dll

// webapi客户端
public class WebApiClient
{
   private readonly string _requestUrl;
   private readonly string _urlString;

   // 构造函数
   public WebApiClient(string urlString, string requestUrl)
   {
      _urlString = urlString;
      _requestUrl = requestUrl;
   }

   // 发起webapi请求
   public T WebApiPost<T>(object value, 
        List<Tuple<string, List<string>>> heads = null, List<string> accepts = null, int timeoutSeconds = 100) { using (var httpClient = new HttpClient()) { httpClient.Timeout = TimeSpan.FromSeconds(timeoutSeconds); httpClient.BaseAddress = new Uri(_urlString); heads?.ForEach(head =>
          httpClient.DefaultRequestHeaders.Add(head.Item1, head.Item2)); httpClient.DefaultRequestHeaders.Accept.Clear(); httpClient.DefaultRequestHeaders.Accept.Add(
          
new MediaTypeWithQualityHeaderValue("application/json")); accepts?.ForEach( accept => httpClient.DefaultRequestHeaders.Accept.Add(
                  new MediaTypeWithQualityHeaderValue(accept))); return httpClient.PostAsJsonAsync(_requestUrl, value) .Result.Content.ReadAsAsync<T>() .Result; } } // 发起webapi请求 public T WebApiGet<T>(List<Tuple<string, List<string>>> heads = null, List<string> accepts = null, bool isResponseJson = true) { using (var httpClient = new HttpClient()) { httpClient.BaseAddress = new Uri(_urlString); heads?.ForEach(head =>
           httpClient.DefaultRequestHeaders.Add(
                      head.Item1, head.Item2)); httpClient.DefaultRequestHeaders.Accept.Clear(); httpClient.DefaultRequestHeaders.Accept.Add(
           new MediaTypeWithQualityHeaderValue("application/json")); accepts?.ForEach( accept => httpClient.DefaultRequestHeaders.Accept.Add( new MediaTypeWithQualityHeaderValue(accept))); if (isResponseJson) { return httpClient.GetAsync(_requestUrl) .Result.Content.ReadAsAsync<T>() .Result; } var content = httpClient.GetAsync(_requestUrl) .Result.Content.ReadAsStringAsync() .Result; return JsonConvert.DeserializeObject<T>(content); } } public static T Post<T>(
    string url, object param, string rpsToken = null) where T : class { var json = JsonConvert.SerializeObject(param); var byteData = Encoding.UTF8.GetBytes(json); var httpRequest = (HttpWebRequest)WebRequest.Create(url); httpRequest.Method = "POST"; httpRequest.KeepAlive = false; httpRequest.ContentType = "application/json;charset=utf-8"; if (!string.IsNullOrWhiteSpace(rpsToken)) httpRequest.Headers.Add("RpsToken", rpsToken); httpRequest.ContentLength = byteData.Length; httpRequest.GetRequestStream().Write(byteData, 0, byteData.Length); httpRequest.Timeout = 15000; var strResponse = string.Empty; Action act = () => { using (var httpResponse = httpRequest.GetResponse()) using (var respStream = httpResponse.GetResponseStream()) using (var reader = new StreamReader(respStream, Encoding.UTF8)) strResponse = reader.ReadToEnd(); }; TryMultiTime(act, 3); return JsonConvert.DeserializeObject<T>(strResponse); } public static void TryMultiTime(
      Action act, int tryTimes, int interval = 2000) { var i = 0; while (true) { try { i++; act(); break; } catch (Exception ex) { if (i >= tryTimes) throw new Exception("请求超时", ex); System.Threading.Thread.Sleep(interval); } } } /// <summary> /// 提交带token的请求 /// </summary> /// <typeparam name="T">返回类型</typeparam> /// <param name="url">地址</param> /// <param name="param">json参数</param> /// <param name="rpsToken">token检验</param> public static T PostByToken<T>(
    string url, object param, string rpsToken = null) where T : class { var json = JsonConvert.SerializeObject(param); var httpContent = new StringContent(json, Encoding.UTF8); httpContent.Headers.Add("RpsToken", rpsToken); httpContent.Headers.ContentType =
              new MediaTypeHeaderValue("application/json"); var response = new HttpClient().PostAsync(url, httpContent); var strResponse = response.Result.Content.ReadAsStringAsync().Result; return JsonConvert.DeserializeObject<T>(strResponse); } }

 

  4.邮件发送代码

//使用System.Net.Mail

/// <summary>
/// 发送信息
/// </summary>
public static void SendMessage(string msg = null)
{
   try
   {
      using (var client = new SmtpClient("主机地址", 25)
      {
         Credentials = new NetworkCredential("发送人地址", "发送人邮箱密码")
      })
      {
         client.Send(SetMail(msg));
      }
   }
   catch (Exception ex)
   {
      NLog.Logger.Debug($"异常:{ex.ToJson()}");
   }
}

/// <summary>
/// 邮件内容
/// </summary>
private static MailMessage SetMail(string msg = null)
{
    var fileName = 
$"{AppDomain.CurrentDomain.BaseDirectory}/logs/{DateTime.Now:yyyy-MM-dd}.log"; Stream stream = null; if (File.Exists(fileName)) { // 打开文件 var fileStream = new FileStream(
      fileName, FileMode.Open, FileAccess.Read, FileShare.Read);
// 读取文件的 byte[] var bytes = 以上是关于WPF项目学习.三的主要内容,如果未能解决你的问题,请参考以下文章

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