码迷,mamicode.com
首页 > Windows程序 > 详细

C# WPF 表单更改提示

时间:2020-01-06 14:28:04      阅读:107      评论:0      收藏:0      [点我收藏+]

标签:resize   代码下载   ucf   family   二维   padding   oat   namespace   ane   

微信公众号:Dotnet9,网站:Dotnet9,问题或建议,请网站留言;
如果您觉得Dotnet9对您有帮助,欢迎赞赏

C# WPF 表单更改提示

内容目录

  1. 实现效果
  2. 业务场景
  3. 编码实现
  4. 本文参考
  5. 源码下载

1.实现效果

未做修改的表单展示
技术图片

表单变化,关闭窗体提示
技术图片

来个Gif动态操作看看
技术图片

2.业务场景

表单修改后,关闭窗体前检查提示

3.编码实现

3.1 添加Nuget库

使用 .Net Core 3.1 创建名为“ValidateDataChange”的WPF解决方案,添加两个Nuget库:MaterialDesignThemes和MaterialDesignColors。

MaterialDesign控件库

3.2 工程结构

4个文件变动:

  1. App.xaml:添加MD控件样式
  2. MainWindow.xaml:主窗口实现效果
  3. MainWindow.xaml.cs:主窗口后台绑定及关闭验证
  4. Contact.cs:绑定的实体

3.3 App.xaml引入MD控件样式

<Application x:Class="ValidateDataChange.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:ValidateDataChange"
             StartupUri="MainWindow.xaml">
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Light.xaml"/>
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml"/>
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Primary/MaterialDesignColor.DeepPurple.xaml"/>
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Accent/MaterialDesignColor.Blue.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>

3.4 主窗体 MainWindow.xaml

表单展示,使用MD控件的Snackbar作为消息提示

<Window x:Class="ValidateDataChange.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:ValidateDataChange"
        mc:Ignorable="d"
        xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
        Title="编辑联系人" Height="500" Width="400" ResizeMode="NoResize" FontFamily="Roboto" 
        FontSize="14" WindowStartupLocation="CenterScreen" Closing="Window_Closing">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="100"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        <materialDesign:ColorZone Mode="PrimaryMid" Grid.Row="0" VerticalAlignment="Stretch">
            <TextBlock Text="联系人" VerticalAlignment="Center" Margin="20" FontSize="30"/>
        </materialDesign:ColorZone>

        <StackPanel Margin="10 30" Grid.Row="1">
            <Grid>
                <materialDesign:PackIcon Kind="Face" VerticalAlignment="Bottom" Margin="2 12" Foreground="{Binding BorderBrush, ElementName=TextBoxName}"/>
                <TextBox x:Name="TextBoxName" Margin="5" materialDesign:HintAssist.Hint="名字" Padding="8 0 0 0" Text="{Binding Name}"
                         Style="{StaticResource MaterialDesignFloatingHintTextBox}"/>
            </Grid>
            <Grid>
                <materialDesign:PackIcon Kind="At" VerticalAlignment="Bottom" Margin="2 12" Foreground="{Binding BorderBrush, ElementName=TextBoxEmail}"/>
                <TextBox x:Name="TextBoxEmail" Margin="5" materialDesign:HintAssist.Hint="邮件" Padding="8 0 0 0" Text="{Binding Email}"
                         Style="{StaticResource MaterialDesignFloatingHintTextBox}"/>
            </Grid>
            <Grid>
                <StackPanel Orientation="Horizontal" VerticalAlignment="Bottom" Margin="2 10">
                    <materialDesign:PackIcon Kind="Facebook" Foreground="{Binding BorderBrush, ElementName=TextBoxFacebook}"/>
                    <TextBlock Text="facebook.com/" Foreground="{Binding BorderBrush, ElementName=TextBoxFacebook}"/>
                </StackPanel>
                <TextBox x:Name="TextBoxFacebook" Margin="5" materialDesign:HintAssist.Hint="Facebook" Padding="54 0 0 0" Text="{Binding Facebook}"
                         Style="{StaticResource MaterialDesignFloatingHintTextBox}"/>
            </Grid>
        </StackPanel>
        <Button Grid.RowSpan="2" Margin="50 72" HorizontalAlignment="Right" VerticalAlignment="Top" Style="{StaticResource MaterialDesignFloatingActionAccentButton}"
                Click="Button_Click">
            <materialDesign:PackIcon Kind="ContentSave"/>
        </Button>

        <materialDesign:Snackbar Grid.Row="1" HorizontalAlignment="Stretch" x:Name="SnackbarUnsavedChanges" VerticalAlignment="Bottom">
            <materialDesign:SnackbarMessage
                Content="有未保存的更改,是否放弃修改?"
                ActionContent="放弃" ActionClick="SnackbarMessage_ActionClick"/>
        </materialDesign:Snackbar>
    </Grid>
</Window>

3.5 MainWindow.xaml.cs

数据绑定,窗体关闭前表单验证:简单使用hashcode判断绑定实体是否有变化。

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 ValidateDataChange
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        int hash;
        bool discardChanges;

        public MainWindow()
        {
            InitializeComponent();

            discardChanges = false;

            var contact = new Contact("Dotnet9", "632871194@qq.com", "Dotnet9");
            hash = contact.GetHashCode();

            this.DataContext = contact;
        }

        private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
        {
            if (this.DataContext.GetHashCode() != hash && !discardChanges)
            {
                SnackbarUnsavedChanges.IsActive = true;
                e.Cancel = true;
            }
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            //保存数据
        }

        private void SnackbarMessage_ActionClick(object sender, RoutedEventArgs e)
        {
            SnackbarUnsavedChanges.IsActive = false;
            discardChanges = true;
            this.Close();
        }
    }
}

3.6 Contact.cs

联系人实体类

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;

namespace ValidateDataChange
{
    internal class Contact : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        private void NotifyPropertyChanged(string info)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(info));
            }
        }


        private string name;
        public string Name
        {
            get { return name; }
            set { name = value; NotifyPropertyChanged("Name"); }
        }
        private string email;
        public string Email
        {
            get { return email; }
            set { email = value; NotifyPropertyChanged("Email"); }
        }
        private string facebook;
        public string Facebook
        {
            get { return facebook; }
            set { facebook = value; NotifyPropertyChanged("Facebook"); }
        }

        public Contact(string name, string email, string facebook)
        {
            this.name = name;
            this.email = email;
            this.facebook = facebook;
        }

        public override int GetHashCode()
        {
            return (name + email + facebook).GetHashCode();
        }

    }
}

4.本文参考

Design com WPF 大神的学习视频:Validate Data Change

开源控件库:MaterialDesignInXamlToolkit

本站对MD开源控件库的介绍:控件介绍

5.代码下载

Github源码下载:下载

除非注明,文章均由 Dotnet9 整理发布,欢迎转载。

转载请注明本文地址:https://dotnet9.com/6823.html

欢迎扫描下方二维码关注 Dotnet9 的微信公众号,本站会及时推送最新技术文章

技术图片

C# WPF 表单更改提示

标签:resize   代码下载   ucf   family   二维   padding   oat   namespace   ane   

原文地址:https://www.cnblogs.com/Dotnet9-com/p/12155815.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!