我有一个显示列的数据网格,通过代码设置 ItemsSource-Property 添加。我还有两列,它们是由 XAML 添加的(一个按钮以及网格中图像和按钮的组合)。现在我正在编辑一些单元格并想阅读它们。在 Windows 窗体中,可以读取特定的单元格,但在 WPF 中这是不可能或不推荐的,我读过。所以我想使用 SelectedItem-Binding。我的问题是, SelectedItem 始终为空。由于列的“混合添加”或者我做错了什么,Datagrid 可能存在问题。
这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>
以及我如何通过代码添加列的代码:
//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;