0
我有一个Datagrid,它显示列,通过设置ItemsSource-属性通过代码添加。我还有两列,它们是由XAML添加的(一个按钮以及一个网格中的图像和按钮的组合)。 现在我正在编辑一些单元格并希望读取它们。 在Windows窗体中可以读取特定的单元格,但这在WPF中是不可能的或推荐的,我读过。所以我想使用SelectedItem-Binding。我的问题是,SelectedItem始终为空。也许Datagrid存在一个问题,因为列的“混合添加”或者我做错了什么。Datagrid中的SelectedItem绑定WPF
这里是我的代码的一部分:
XAML:
<DataGrid AutoGenerateColumns="True" Margin="12,162,12,12" Name="dgExisting" CanUserAddRows="False" RowHeight="24" VerticalGridLinesBrush="#50000000" HorizontalGridLinesBrush="#50000000" SelectionMode="Single" CellStyle="{StaticResource DataGridCell_Centering}" CellEditEnding="dgExisting_CellEditEnding" SelectedItem="{Binding SelectedItem, Mode=TwoWay}">
<DataGrid.Columns>
<DataGridTemplateColumn Header="Password" Width="60" IsReadOnly="True">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Button Style="{StaticResource Flat}" Click="btnDgChangePassword_Click">
<Grid>
<Image Source="{Binding imgStatus}" Margin="0,0,0,0" HorizontalAlignment="Left" VerticalAlignment="Top"/>
<Label Content="{Binding PasswordState}" Margin="16,-5,0,0" HorizontalAlignment="Left" VerticalAlignment="Top" Height="25" />
</Grid>
</Button>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
<DataGridTemplateColumn Header="Delete" Width="50" IsReadOnly="True">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Button Click="btnDgRemove_Click" Style="{StaticResource Flat}">
<Image Source="Images/redcross16.png" />
</Button>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
和代码我如何通过代码添加列:
//Create Table for Gridview
DataTable dtList = new DataTable();
dtList.Columns.Add(new DataColumn("Username"));
dtList.Columns.Add(new DataColumn("PasswordState"));
dtList.Columns.Add(new DataColumn("Domain"));
dtList.Columns.Add(new DataColumn("Description"));
dtList.Columns.Add(new DataColumn("id"));
foreach (UserCredential uc in credentialList)
{
DataRow dR = dtList.NewRow();
dR["Username"] = uc.getUsername();
dR["PasswordState"] = (uc.getPassword().Length > 0 ? "yes":"no");
dR["Domain"] = uc.getDomain();
dR["Description"] = uc.getDescription();
dR["id"] = uc.getId();
dtList.Rows.Add(dR);
}
dtList.Columns.Add("imgStatus");
for (int i = 0; i < dtList.Rows.Count; i++)
{
dtList.Rows[i]["imgStatus"] = (dtList.Rows[i]["PasswordState"].ToString() == "yes" ? "Images/key16.png" : "");
}
dgExisting.ItemsSource = dtList.DefaultView;
dgExisting.Columns[getColumnId("Password")].DisplayIndex = 2; //reorder Key-Image
dgExisting.Columns[getColumnId("PasswordState")].Visibility = System.Windows.Visibility.Hidden;
dgExisting.Columns[getColumnId("imgStatus")].Visibility = System.Windows.Visibility.Hidden;
dgExisting.Columns[getColumnId("id")].Visibility = System.Windows.Visibility.Hidden;
SelectedItem属性在哪里?它是什么数据类型?网格的DataContext是否设置在任何位置? –
您是否尝试在代码隐藏中添加'SelectionChanged'事件处理程序以查看问题是否在DataGrid中选择未更改,或者问题是否与绑定有关? – CodingGorilla
@KDiTraglia'SelectedItem'在XAML的第一行的末尾,你必须滚动很长一段时间,但它在那里。如果他可以看到他的行(从而做出选择),那么假设'DataContext'设置正确是合理的。 – CodingGorilla