WPF+SqlSugar+MVVM实现增删改查
1、新建一个WPF应用(NET Framework）
2、安装SqlSugar NuGet包
3、在SqlSugar4.x下载代码生成器:https://www.donet5.com/Doc/8/1137
4、在WPF中新建三个文件夹 Models 主要放实体类、Views 主要放窗体、ViewModels 主要是View逻辑的实现
5、把生成的实体类放到Models文件夹内，在ViewModels 新建一个类DelegateCommands.cs
切记在实体类的加上
public object Clone()
{
return (Object)this.MemberwiseClone();
}
public class DelegateCommands : ICommand
{
//当命令可执行状态发生改变时,应当被激发
public event EventHandler CanExecuteChanged;
public Action<object> ExecuteCommand = null;
public Func<object, bool> CanExecuteCommand = null;
/// <summary>
/// 用于判断命令是否可以执行
/// </summary>
/// <param name="parameter"></param>
/// <returns></returns>
public bool CanExecute(object parameter)
{
if (CanExecuteCommand !=null)
{
return CanExecuteCommand(parameter);
}
else
{
return true;
}
}
/// <summary>
/// 命令执行
/// </summary>
/// <param name="parameter"></param>
public void Execute(object parameter)
{
if (ExecuteCommand !=null)
{
ExecuteCommand(parameter);
}
}
6、ViewModel新建UserViewModel.cs
public class UserViewModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(string PropertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(PropertyName));
}
}
SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
{
//数据库配置
ConnectionString = "Data Source=.;Initial Catalog=Test;Persist Security Info=True;User ID=sa;Password=123456",
DbType = DbType.SqlServer,//设置数据库类型
IsAutoCloseConnection = true,//自动释放数据务，如果存在事务，在事务结束后释放
InitKeyType = InitKeyType.Attribute //从实体特性中读取主键自增列信息
});
private ObservableCollection<Users> userList;
/// <summary>
/// 用户集合
/// </summary>
public ObservableCollection<Users> UserList
{
get
{
if (userList == null)
{
userList = new ObservableCollection<Users>();
//设置数据源 //也可以直接写查询
userList = new ShowDataViewModel().GetUsers();
}
return userList;
}
set {
if (userList == null)
{
userList = new ObservableCollection<Users>();
}
userList = value;
OnPropertyChanged("UserList");
}
}
public Users selectUser;
/// <summary>
/// 被选中的用户
/// </summary>
public Users SelectUser
{
get
{
if (selectUser == null)
{
selectUser = new Users();
}
return selectUser;
}
set
{
if (selectUser == null)
{
selectUser = new Users();
}
selectUser = value; OnPropertyChanged("SelectUser");
}
}
/// <summary>
/// 注册命令
/// </summary>
private void RegisterCommands()
{
AddCommand = new DelegateCommands();
AddCommand.ExecuteCommand = new Action<object>(AddUser);
UpdateCommand = new DelegateCommands();
UpdateCommand.ExecuteCommand = new Action<object>(UpdateUser);
DeleteCommand = new DelegateCommands();
DeleteCommand.ExecuteCommand = new Action<object>(DeleteUser);
SelectionCommand = new DelegateCommands();
SelectionCommand.ExecuteCommand = new Action<object>(SelectionUser);
}
public UserViewModel()
{
RegisterCommands();
}
/// <summary>
/// 显示提示信息
/// </summary>
/// <param name="txt"></param>
public void MsgShow(string txt)
{
System.Windows.MessageBox.Show(txt);
//删除后清空选择用户
SelectUser = null;
}
#region 注册命令
/// <summary>
/// 新增用户
/// </summary>
public DelegateCommands AddCommand { get; set; }
/// <summary>
/// 更新用户
/// </summary>
public DelegateCommands UpdateCommand { get; set; }
/// <summary>
/// 删除用户
/// </summary>
public DelegateCommands DeleteCommand { get; set; }
/// <summary>
/// 选择用户
/// </summary>
public DelegateCommands SelectionCommand { get; set; }
public void AddUser(object parameter)
{
Users us = new Users();
us.U_Name = SelectUser.U_Name;
us.U_Age = SelectUser.U_Age;
us.U_Sex = SelectUser.U_Sex;
us.U_Tel = SelectUser.U_Tel;
us.U_Pwd = "123";
us.D_ID = 1;
var t3 = db.Insertable(us).ExecuteReturnEntity();
MsgShow("用户编号:" + t3.U_ID + "\n新增成功！");
UserList = new ShowDataViewModel().GetUsers();
}
public void UpdateUser(object parameter)
{
if (SelectUser.U_ID < 1)
{
MsgShow("请选择修改项！");
return;
}
//查找需要修改的对象
Users user = UserList.Where(a => a.U_ID == SelectUser.U_ID).SingleOrDefault();
//查找需要修改的对象索引
int index = UserList.IndexOf(user);
//使数据的复制变为深复制,需要实现ICloneable接口
var t1 = db.Updateable((Users)SelectUser.Clone()).ExecuteCommand(); //这种方式会以主键为条件
MsgShow("用户编号:" + SelectUser.U_ID + "\n修改成功！");
UserList = new ShowDataViewModel().GetUsers();
}
public void DeleteUser(object parameter)
{
if (SelectUser.U_ID < 1)
{
MsgShow("请选择修改项！");
return;
}
Users user = UserList.Where(a => a.U_ID == SelectUser.U_ID).SingleOrDefault();
var t0 = db.Deleteable<Users>().Where(u => u.U_ID == user.U_ID).ExecuteCommand();
MsgShow("用户编号:" + SelectUser.U_ID + "\n删除成功！");
UserList = new ShowDataViewModel().GetUsers();
}
public void SelectionUser(object parameter)
{
DataGrid grid = (DataGrid)parameter;
//使数据的复制变为深复制,需要实现ICloneable接口
if (grid.SelectedItem!=null)
{
SelectUser = (Users)((Users)grid.SelectedItem).Clone();
}
}
#endregion
}
7、View新建窗体
点击查看代码
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="5*"/>
<RowDefinition Height="3*"/>
<RowDefinition Height="1.5*"/>
</Grid.RowDefinitions>
<DataGrid x:Name="dgUser" IsReadOnly="True" AutoGenerateColumns="False" CanUserAddRows="False" HorizontalAlignment="Left" ItemsSource="{Binding UserList}" Width="444">
<i:Interaction.Triggers>
<i:EventTrigger EventName="SelectionChanged" >
<i:InvokeCommandAction Command="{Binding SelectionCommand}" CommandParameter="{Binding ElementName=dgUser}" />
</i:EventTrigger>
</i:Interaction.Triggers>
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding U_ID}" Header="编号"/>
<DataGridTextColumn Binding="{Binding U_Name}" Header="姓名" Width="100"/>
<DataGridTextColumn Binding="{Binding U_Age}" Header="年龄"/>
<DataGridTextColumn Binding="{Binding U_Sex}" Header="性别" Width="60"/>
<DataGridTextColumn Binding="{Binding U_Tel}" Header="电话" Width="172"/>
</DataGrid.Columns>
</DataGrid>
<GroupBox Header="用户基本信息" Grid.Row="1">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<StackPanel Grid.Column="0" Grid.Row="0" Orientation="Horizontal">
<Label x:Name="lblID" Content="编号：" VerticalAlignment="Center" />
<TextBox x:Name="tbxID" IsEnabled ="False" Text="{Binding SelectUser.U_ID}" VerticalAlignment="Center" MaxLength="5" Height="22" Width="90"/>
</StackPanel>
<StackPanel Grid.Column="1" Grid.Row="0" Orientation="Horizontal">
<Label x:Name="lblName" Content="姓名：" VerticalAlignment="Center" />
<TextBox x:Name="tbxName" Text="{Binding SelectUser.U_Name}" VerticalAlignment="Center" Height="22" MaxLength="6" Width="90"/>
</StackPanel>
<StackPanel Grid.Column="2" Grid.Row="0" Orientation="Horizontal">
<Label x:Name="lblAge" Content="年龄：" VerticalAlignment="Center" />
<TextBox x:Name="tbxAge" Text="{Binding SelectUser.U_Age}" VerticalAlignment="Center" Height="22" MaxLength="4" Width="90"/>
</StackPanel>
<StackPanel Grid.Column="0" Grid.Row="1" Orientation="Horizontal">
<Label x:Name="lblSex" Content="性别：" VerticalAlignment="Center"/>
<ComboBox Text="{Binding SelectUser.U_Sex}" SelectedIndex="0" x:Name="cbxSex" VerticalAlignment="Center" Width="90">
<ComboBoxItem Tag="1" Content="男"/>
<ComboBoxItem Tag="2" Content="女"/>
</ComboBox>
</StackPanel>
<StackPanel Grid.Column="1" Grid.ColumnSpan="2" Grid.Row="2" Orientation="Horizontal">
<Label x:Name="lblRemarks" Content="电话：" VerticalAlignment="Center"/>
<TextBox x:Name="tbxRemarks" Text="{Binding SelectUser.U_Tel}" VerticalAlignment="Center" Height="22" Width="235" />
</StackPanel>
</Grid>
</GroupBox>
<GroupBox Header="功能操作" Grid.Row="2">
<StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
<Button x:Name="btnSave" Command="{Binding AddCommand}" Content="新增" VerticalAlignment="Center" Width="69" Height="19" Margin="10,0,10,0" />
<Button x:Name="btnUpdate" Command="{Binding UpdateCommand}" Content="修改" VerticalAlignment="Center" Width="69" Height="19" Margin="10,0,10,0"/>
<Button x:Name="btnDelete" Command="{Binding DeleteCommand}" Content="删除" VerticalAlignment="Center" Width="69" Height="19" Margin="10,0,10,0"/>
</StackPanel>
</GroupBox>
</Grid>
ps:下载地址：链接：链接：https://pan.baidu.com/s/1GECuLU3OwwtnPQDv-TvuhA?pwd=pqio
