设置新行占位符的文本 [英] Setting text for new row placeholder
本文介绍了设置新行占位符的文本的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个启用了CanUserAddRows的简单数据网格:
I have a simple datagrid with CanUserAddRows enabled:
<DataGrid Name="TestCasesDataGrid" Padding="0 0 5 0" AutoGenerateColumns="False" CanUserAddRows="True" CanUserDeleteRows="True" CanUserSortColumns="False">
<DataGrid.Columns>
<DataGridTextColumn Width="100" Binding="{Binding Name}" />
</DataGrid.Columns>
</DataGrid>
现在我想在新行中使用灰色的默认文本新行...占位符,当我单击它时会消失(添加新行)。
在另一个问题我找到了以下设置前景色的方法:
Now I want to to have a gray default text "new row..." in the new row placeholder, which disappears, when I click on it (to add a new row).
In another question I found the following way to set the foreground color:
<DataGrid Name="TestCasesDataGrid" Padding="0 0 5 0" AutoGenerateColumns="False" CanUserAddRows="True" CanUserDeleteRows="True" CanUserSortColumns="False">
<DataGrid.Resources>
<Style TargetType="{x:Type DataGridRow}">
<Style.Triggers>
<DataTrigger Binding="{Binding}" Value="{x:Static CollectionView.NewItemPlaceholder}">
<Setter Property="Foreground" Value="Gray" />
</DataTrigger>
</Style.Triggers>
</Style>
</DataGrid.Resources>
<DataGrid.Columns>
<DataGridTextColumn Width="100" Binding="{Binding Name}" />
</DataGrid.Columns>
</DataGrid>
但是我也找不到一种添加文本的方法。
But I fail to find a way to add a text as well.
推荐答案
下面是我发现的解决方案的代码(使用帮助方法在可视化树中找到子级):
Here is a code behind solution I found (using a helper method to find children in the visual tree):
public static DependencyObject FindChild(DependencyObject parent, Func<DependencyObject, bool> predicate)
{
if (parent == null) return null;
int childrenCount = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < childrenCount; i++)
{
var child = VisualTreeHelper.GetChild(parent, i);
if (predicate(child))
{
return child;
}
else
{
var foundChild = FindChild(child, predicate);
if (foundChild != null)
return foundChild;
}
}
return null;
}
在DataGrid可见并完全加载后进行以下调用:
Make the following call after the DataGrid became visible and is fully loaded:
var dataGridRow = Tools.FindChild(testCasesDataGrid, x =>
{
var element = x as DataGridRow;
if (element != null && element.Item == System.Windows.Data.CollectionView.NewItemPlaceholder)
return true;
else
return false;
}) as DataGridRow;
var textBlock = Tools.FindChild(dataGridRow, x =>
{
return x is TextBlock;
}) as TextBlock;
textBlock.Text = "new row...";
textBlock.Foreground = System.Windows.Media.Brushes.Gray;
这篇关于设置新行占位符的文本的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
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