我已经在不使用MVVM的情况下实现了这个:
private void Del_btn_Click(object sender, RoutedEventArgs e)
{
try
{
List<string> cid = new List<string>();
foreach (DataRowView rw in Xgrid.SelectedItems)
{
cid.Add(rw[1].ToString());
MessageBox.Show("Deleting " + rw[1].ToString());
}
foreach (string cq in cid)
{
SqlConnection con = new SqlConnection(str);
con.Open();
SqlCommand cmd = new SqlCommand("delete_prc", con);
cmd.CommandType = CommandType.StoredProcedure;
SqlParameter param1 = new SqlParameter();
param1.ParameterName = "@Cid";
param1.SqlDbType = SqlDbType.NVarChar;
param1.Value = cq;
cmd.Parameters.Add(param1);
cmd.ExecuteNonQuery();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
现在我想用MVVM做这个。
我有customers.cs模型类,其中包含所有字段。 现在我不知道如何绑定复选框,所以我能够做到这一点。
Xaml代码:
<DataGrid.RowHeaderTemplate>
<DataTemplate>
<Grid>
<CheckBox IsChecked="{Binding Path=ViewModelBase.CheckAll,
Mode=TwoWay, UpdateSourceTrigger=PropertyChanged,
RelativeSource={RelativeSource FindAncestor,
AncestorType={x:Type DataGridRow}}}" Name="delete"/>
</Grid>
</DataTemplate>
</DataGrid.RowHeaderTemplate>
<DataGrid.Columns>
<DataGridTextColumn Header="rowNo." Width="60" Binding="{Binding RowNumber}" IsReadOnly="True">
<DataGridTextColumn.ElementStyle>
<Style TargetType="TextBlock">
<Setter Property="HorizontalAlignment" Value="Center" />
</Style>
</DataGridTextColumn.ElementStyle>
</DataGridTextColumn>
<DataGridTextColumn Header="CustomerID" Width="80" Binding="{Binding CustomerID}" IsReadOnly="True"></DataGridTextColumn>
<DataGridTextColumn Header="CompanyName" Width="100" Binding="{Binding CompanyName}"></DataGridTextColumn>
<DataGridTextColumn Header="ContactName" Width="100" Binding="{Binding ContactName}"></DataGridTextColumn>
<DataGridTextColumn Header="ContactTitle" Width="100" Binding="{Binding ContactTitle}"></DataGridTextColumn>
<DataGridTextColumn Header="Address" Width="80" Binding="{Binding Address}"></DataGridTextColumn>
<DataGridTextColumn Header="City" Width="100" Binding="{Binding City}"></DataGridTextColumn>
<DataGridTextColumn Header="Region" Width="80" Binding="{Binding Region}"></DataGridTextColumn>
<DataGridTextColumn Header="PostalCode" Width="100" Binding="{Binding PostalCode}"></DataGridTextColumn>
<DataGridTextColumn Header="Country" Width="100" Binding="{Binding Country}"></DataGridTextColumn>
<DataGridTextColumn Header="Phone" Width="100" Binding="{Binding Phone}"></DataGridTextColumn>
<DataGridTextColumn Header="Fax" Width="100" Binding="{Binding Fax}"></DataGridTextColumn>
</DataGrid.Columns>
那么如何将其与mvvm集成。请帮我这样做。
我想知道在我的viewmodel类中要定义什么,以及执行此操作的绑定路径应该是什么。
答案 0 :(得分:0)
在你的DataGrid中输入一个命令,你需要添加
的xmlns:ⅰ= “http://schemas.microsoft.com/expression/2010/interactivity”
<DataGrid HorizontalAlignment="Left" VerticalAlignment="Top" Height="103" Width="517">
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseDoubleClick">
<i:InvokeCommandAction Command="{Binding GetItem}" CommandParameter="{Binding Header,ElementName=id}"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</DataGrid>
并访问 ViewModel 中的命令,如下所示
RelayCommand getitem;
public RelayCommand GetItem
{
get
{
if(getitem == null)
{
getitem = new RelayCommand(p=>Executeyourcommand(p));
}
return getitem;
}
}
void Executeyourcommand(object parameter)
{
// parameter is your CustomerID
// do your work here
}
您的Command帮助程序类
public class RelayCommand : ICommand
{
readonly Action<object> execute;
readonly Predicate<object> canexecute;
public RelayCommand(Action<object> execute)
: this(execute, null)
{
}
public RelayCommand(Action<object> Execute, Predicate<object> Canexecute)
{
if(Execute == null)
throw new ArgumentNullException("execute");
execute = Execute;
canexecute = Canexecute;
}
public bool CanExecute(object parameter)
{
if(canexecute == null)
return true;
else
return canexecute(parameter);
}
public event EventHandler CanExecuteChanged
{
add
{
CommandManager.RequerySuggested += value;
}
remove
{
CommandManager.RequerySuggested -= value;
}
}
public void Execute(object parameter)
{
execute(parameter);
}
}
和ofc我没有测试代码,我希望这是你在寻找