将DataTable绑定到DataGrid。 WPF MVVM

时间:2017-08-30 10:01:01

标签: c# mvvm datatable binding datagrid

我正在尝试在Datagrid上绑定Datatable以便能够动态填充它。 Datagrid似乎找到了Datatable,因为当我填充它并且在RaisePropertyChanged之后我有很多空行。也没有专栏。

我的观点:

<UserControl x:Class="NWViewer.View.DataGridView"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
         xmlns:local="clr-namespace:NWViewer.View"
         mc:Ignorable="d" 
         d:DesignHeight="300" d:DesignWidth="300"
         DataContext="{Binding DataGrid, Source={StaticResource Locator}}">
<Grid>
    <DataGrid ItemsSource="{Binding oTable.DefaultView}" AutoGenerateColumns="True" ColumnWidth="25">
    </DataGrid>
</Grid>
</UserControl>

我的ViewModel:

public DataTable oTable { get;set;}

private void getNewData(List<ElementBaseViewModel> rootElement)
{    
    oTable.Clear();
    foreach (var element in rootElement)
    {
        buildFromChildren(element);                      
    }
    RaisePropertyChanged("oTable");                
}        
private void buildFromChildren(ElementBaseViewModel element)
    {
        if(element.Children != null)
        {
            if (isAttributeChildren(element))
            {
                DataRow oRow = oTable.NewRow();
                foreach (var attribute in element.AttributeChildren)
                {
                    Model.Attribute attr = (Model.Attribute)attribute.Element;
                    if (!oTable.Columns.Contains(attr.name))
                    oTable.Columns.Add(attr.name);
                    oRow[attr.name] = attr.Value;
                }
                oTable.Rows.Add(oRow);
            }
            foreach (var elem in element.ElementChildren)
            {
                buildFromChildren(elem);
            }
        }
    }

这是图形渲染:

Datagrid

但是当我调试它时,DataTable似乎正确填充:

DataTable when debugging

1 个答案:

答案 0 :(得分:1)

问题很可能与DataTable初始化有关,DataGrid会在设置新的ItemsSource时自动生成列,但是当列为时,它不会重新生成列初始化后添加到基础表。

解决方案1:

DataTable初始化之前创建所有列,然后将其绑定到DataGrid

解决方案2:

强制刷新ItemsSource。它应该像这样工作,但如果可能的话,我强烈推荐解决方案1:

var tempTable = oTable;
oTable = null;
RaisePropertyChanged("oTable");
oTable = tempTable;
RaisePropertyChanged("oTable");