我需要读取WPF应用程序中数据网格中列的所有值。
for (int i = 0; i < dgridList.Items.Count; i++)
{
DataGridRow row = (DataGridRow)dgridList.ItemContainerGenerator.ContainerFromIndex(i);
TextBlock t_name = dgridList.Columns[0].GetCellContent(row) as TextBlock;
TextBlock t_type = dgridList.Columns[1].GetCellContent(row) as TextBlock;
Tuple<string, string> mod = new Tuple<string, string>(t_name.Text, t_type.Text);
Alist.Add(mod);
}
这是datagrid的XMAL声明
<DataGrid x:Name ="dgridList" Margin="0,0,0,0" Grid.Row="1" IsReadOnly="True" AutoGenerateColumns="False">
如果数据网格仅包含3,4个项目,则此迭代正常工作(如果我们在数据网格迭代中添加更多项目并不起作用。)。如果我们增加项目,婴儿车栏也可见。 (因为数据网格大小设置为小)
An unhandled exception of type 'System.ArgumentNullException' occurred in PresentationFramework.dll
Additional information: Value cannot be null.
如果我尝试读取数据网格中的值(超过4个项目),我收到此错误。
我该如何解决这个问题。
答案 0 :(得分:2)
如果您已将ItemsSource
的{{1}}属性设置为DataGrid
,则可以遍历所有IEnumerable<YourClass>
个对象并获取其属性值:
YourClass
答案 1 :(得分:1)
<强> XAML 强>
<DataGrid ColumnWidth="*"
IsReadOnly="True"
AutoGenerateColumns="False"
SelectionMode="Single"
HorizontalScrollBarVisibility="Auto"
VerticalScrollBarVisibility="Auto"
ScrollViewer.CanContentScroll="True"
ItemsSource="{Binding MyData}"
SelectedItem="{Binding Item}"
>
<DataGrid.Columns>
<DataGridTextColumn Header="Nº." Binding="{Binding NumberProperty}" MinWidth="100" With="Auto"/>
<DataGridTextColumn Header="Name" Binding="{Binding NameProperty}" Width="*"/>
</DataGrid.Columns>
ViewModel (首先需要实施INotifyPropertyChanged
)
private ObservableCollection<MyData> _myData;
private MyData _selectdItem;
public ObservableCollection<MyData> DataCollection
{
get { return _myData; }
set { _myData = value; OnPropertyChanged("DataCollection"); }
}
//Your current selected item in the datagrid
public MyData Item
{
get { return _selectdItem; }
set
{
_selectdItem = value;
OnPropertyChanged("Item");
}
}
private void ReadAllItems()
{
foreach (var item in DataCollection)
{
var mod = new Tuple<string, string>(item.Number, item.Name);
Alist.Add(mod);
}
}
private void LoadDataCollection()
{
using (var db = new YourContext())
{
//Your DataGrid will fill here
DataCollection = new ObservableCollection<MyData> ( db.YourEntity.List() )
}
}