【发布时间】：2015-12-30 04:47:18
【问题描述】：
我还是 wpf - mvvm 的初学者。我有一个与集合绑定的数据网格。
我需要用我的文本框的内容填充第一列。 所以每次我添加一个新行时，第一列应该已经有我的文本框的内容了。
我该怎么做？
查看：
<Grid DataContext="{Binding Source={StaticResource invoice}}">
<StackPanel Orientation="Horizontal">
<TextBox Width="71"
Name="InvoiveNumber"
Text="{Binding ??, Mode=OneWay}">
<!-- My textbox -->
</TextBox>
<DatePicker></DatePicker>
<Label Content="Shop" />
<ComboBox Margin="5"
ItemsSource="{Binding Collection, Source={StaticResource shop}}"
DisplayMemberPath="shop1"
Width="53" />
<Label Content="Supplier" />
<ComboBox Margin="5"
ItemsSource="{Binding Collection, Source={StaticResource supplier}}"
DisplayMemberPath="supplier"
SelectedItem="{Binding Selected, Source={StaticResource supplier}, Mode=TwoWay}"
Width="46" />
</StackPanel>
<DataGrid x:Name="dataGridInvoice"
Margin="5"
Grid.Row="1"
ItemsSource="{Binding Collection}"
AutoGenerateColumns="False">
<DataGrid.Columns>
<!-- My column -->
<DataGridTextColumn x:Name="dataGridTextColumn"
Header="Supplier Invoice Nb"
Binding="{Binding suppInvNumber, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
Width="*" />
<DataGridComboBoxColumn Header="Ref Supplier"
ItemsSource="{Binding Products, Source={StaticResource supplier}, Mode=TwoWay}"
DisplayMemberPath="refsup"
SelectedValueBinding="{Binding refSupp}"
SelectedValuePath="refsup"
Width="*" />
<DataGridTextColumn Header="Quantity"
Binding="{Binding quantity, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
Width="*" />
<DataGridTextColumn Header="Prix/MOQ"
Binding="{Binding unitPrice, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
Width="*" />
<DataGridTextColumn Header="Total Price"
Binding="{Binding totalPrice, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
Width="*" />
</DataGrid.Columns>
</DataGrid>
<Button x:Name="BtnAdd"
Content="Save"
Command="{Binding SaveCommand}"
Margin="94,0" />
</StackPanel>
</Grid>
视图模型：
public class InvoiceViewModel : ViewModelBase
{
public Context ctx = new Context();
public InvoiceViewModel()
{
Get(false);
}
private ObservableCollection<Invoice> collection;
public ObservableCollection<Invoice> Collection
{
get
{
return collection;
}
set
{
collection = value;
OnPropertyChanged("Collection");
}
}
private Invoice _selected;
public Invoice Selected
{
get
{
return _selected;
}
set
{
_selected = value;
OnPropertyChanged("Selected");
}
}
private void Get(bool loadDataFirst)
{
if (loadDataFirst) ctx.Invoices.Load();
Collection = ctx.Invoices.Local;
}
private void Save()
{
ctx.SaveChanges();
}
private void Delete()
{
var id = Selected;
var invoice = (from i in ctx.Invoices
where i.idInvoice == id.idInvoice
select i).SingleOrDefault();
Collection.Remove(invoice);
}
private Invoice _currentItem;
public Invoice CurrentItem
{
get
{
return _currentItem;
}
set
{
_currentItem = value;
OnPropertyChanged("CurrentItem");
}
}
#region "Command"
private ICommand saveCommand;
private ICommand removeCommand;
public ICommand SaveCommand
{
get
{
return saveCommand ?? (saveCommand = new RelayCommand(p => this.Save(), p => this.CanSave()));
}
}
private bool CanSave()
{
return true;
}
public ICommand DeleteCommand
{
get
{
return removeCommand ?? (removeCommand = new RelayCommand(p => this.Delete(), p => this.CanDelete()));
}
}
public bool CanDelete()
{
if (Selected != null)
return true;
else
return false;
}
#endregion
}
【问题讨论】：
-
你能解释一下“我在文本框中写的内容应该在每个 dataGridRow 的第一列”是什么意思...详细说明一下以了解
-
第一栏？还是 StackPanel 中的文本框？为什么要绑定到静态资源而不是所有堆栈面板控件中的默认 DataContext (ViewModel)？这真的是你打算做的吗？
-
尝试 Text="{Binding CurrentItem.suppInvNumber}"> 对于 TextBox，我猜 add 函数会将 CurrentItem 存储到数据库并添加到 Collection。
-
文本框的值必须放在每一行的第一列。在我的堆栈面板中，我将组合框与静态资源绑定，因为我正在从其他 ViewModel（ShopViewModel、SupplierViewModel、...）填充它们
-
对不起@daniel，它不起作用
标签： c# wpf mvvm binding datagrid