Question

我是wpf的新手。这是我的oneUserControl，其中有一个数据网格。

   <DataGrid ItemsSource="{Binding TraceMessages}" 
                    AutoGenerateColumns="False"
                    CanUserReorderColumns="True" 
                    CanUserSortColumns="True">

            <DataGrid.Columns>
                <DataGridTextColumn Header="Severity" Binding="{Binding Path=Severity}"/>
                <DataGridTextColumn Header="Context" Width="300" Binding="{Binding Path=Context}"/>
                <DataGridTextColumn Header="Correlation Id" Binding="{Binding Path=CorrelationId}"/>
                <DataGridTextColumn Header="Message Body" Width="600" Binding="{Binding Path=Data}"/>
            </DataGrid.Columns>
        </DataGrid>

我还有另一个用户控件，我需要访问哪个视图模型才能从datagrid上访问数据。？

Answer 1

如果视图的ViewModel中有另一个ViewModel，则可以在创建2个VM之后执行此操作。在OnYourFirstVMPropertyChanged方法更改中设置的任何属性之后，这将使您的第一个VM与第二个VM并存：

public class YourVMDataSource
{
    #region Attributes

    private readonly YourFirstVM yourFirstVM;
    private readonly YourSecondVM yourSecondVM;

    #endregion

    #region Public Methods

    public NumeracionFacturasDisponiblesVMDataSource(YourFirstVM yourFirstVM, YourSecondVM yourSecondVM)
    {
        this.yourFirstVM = yourFirstVM;
        this.yourSecondVM = yourSecondVM;
    }


    public void Initialize()
    {
        this.yourFirstVM.PropertyChanged += this.OnYourFirstVMPropertyChanged;
    }

    #endregion

    #region Event Handlers

    private void OnYourFirstVMPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
    {
        YourFirstVM yourFirstVMSender = (YourFirstVM) sender;
        switch (e.PropertyName)
        {
            case "WhateverPropertyYouWantToSincronize":
                 this.YourSecondVM.PropertyYouWantToGet = sender. WhateverPropertyYouWantToSincronize;
                 break;
        }
    }

    #endregion
}

请再次询问是否还没有收到。

如何从另一个用户控件的DataGrid读取数据

1 个答案: