1、WPF 获得DataTemplate中的控件, 下面这个示例是从ListBox中获得ListBoxItem模板的控件信息。
前台代码：
<!--获得模板中的控件-->
<ListBox Margin=
"12,32,0,0"
IsSynchronizedWithCurrentItem=
"True"
ItemsSource=
"{Binding}"
Name=
"listBox1"
SelectedIndex=
"0"
Height=
"186"
VerticalAlignment=
"Top"
HorizontalAlignment=
"Left"
Width=
"287"
>
<ListBox.ItemTemplate>
<DataTemplate x:Name=
"gridDataTemplate"
>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width=
"0.5*"
/>
<ColumnDefinition Width=
"0.5*"
/>
<ColumnDefinition Width=
"0.5*"
/>
<ColumnDefinition Width=
"0.5*"
/>
</Grid.ColumnDefinitions>
<TextBlock Text=
"{Binding Path=ID}"
/>
<TextBlock Grid.Column=
"1"
x:Name=
"myName"
Text=
"{Binding Path=Name}"
/>
<TextBlock Grid.Column=
"2"
Text=
"{Binding Path=Age}"
Background=
"{Binding Path=Age, Converter={StaticResource BackgroundConverter}}"
/>
<CheckBox Grid.Column=
"3"
x:Name=
"myCheckBox"
IsChecked=
"{Binding Path= ISBoy, Converter={StaticResource BoolConverter}}"
/>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
|
资源：
<Window.Resources>
<Con:BackgroundConverter x:Key=
"BackgroundConverter"
/>
<Con:BoolConverter x:Key=
"BoolConverter"
/>
</Window.Resources>
|
<Button Height=
"23"
HorizontalAlignment=
"Left"
Margin=
"35,251,0,0"
Name=
"button1"
VerticalAlignment=
"Top"
Width=
"209"
Click=
"button1_Click"
>GetControlFromDataTemplate</Button>
|
后台代码：
public
Window1()
{
InitializeComponent();
listBox1.DataContext = GetDataTable();
}
|
Click事件：关键代码
private
void
button1_Click(
object
sender, RoutedEventArgs e)
{
ListBoxItem myListBoxItem = (ListBoxItem)listBox1.ItemContainerGenerator.ContainerFromItem(listBox1.SelectedItem);
ContentPresenter contentpresenter = FindFirstVisualChild<ContentPresenter>(myListBoxItem);
DataTemplate MyDataTemplate = contentpresenter.ContentTemplate;
TextBlock myTextBlock = MyDataTemplate.FindName(
"myName"
, contentpresenter)
as
TextBlock;
if
(myTextBlock !=
null
)
{
MessageBox.Show(myTextBlock.Text);
}
}
|
数据源：当然也可以自己连接数据库获得数据源
private
DataTable GetDataTable()
{
DataTable data =
new
DataTable(
"MyDataTable"
);
DataColumn ID =
new
DataColumn(
"ID"
);
//第一列
ID.DataType = System.Type.GetType(
"System.Int32"
);
//ID.AutoIncrement = true; //自动递增ID号
data.Columns.Add(ID);
//设置主键
DataColumn[] keys =
new
DataColumn[1];
keys[0] = ID;
data.PrimaryKey = keys;
data.Columns.Add(
new
DataColumn(
"Name"
,
typeof
(
string
)));
//第二列
data.Columns.Add(
new
DataColumn(
"Age"
,
typeof
(
string
)));
//第三列
data.Columns.Add(
new
DataColumn(
"ISBoy"
,
typeof
(Int16)));
//第三列
data.Rows.Add(1,
" XiaoM"
,
" 20"
, 1);
data.Rows.Add(2,
" XiaoF"
,
" 122"
, 0);
data.Rows.Add(3,
" XiaoA"
,
" 29"
, 1);
data.Rows.Add(4,
" XiaoB"
,
" 102"
, 0);
return
data;
}
|
值转换：BackgroundConverter类是改变颜色，BoolConverter是将Bool互相转换Int
public
class
BackgroundConverter : IValueConverter
{
#region IValueConverter Members
public
object
Convert(
object
value, Type targetType,
object
parameter, System.Globalization.CultureInfo culture)
{
Color color =
new
Color();
int
num =
int
.Parse(value.ToString());
if
(num > 100)
color = Colors.Yellow;
else
if
(num < 50)
color = Colors.LightGreen;
else
color = Colors.LightPink;
return
new
SolidColorBrush(color);
}
public
object
ConvertBack(
object
value, Type targetType,
object
parameter, System.Globalization.CultureInfo culture)
{
throw
new
NotImplementedException();
}
#endregion
}
public
class
BoolConverter : IValueConverter
{
#region IValueConverter Members
public
object
Convert(
object
value, Type targetType,
object
parameter, System.Globalization.CultureInfo culture)
{
bool
flag =
false
;
if
(1 ==
int
.Parse(value.ToString()))
{
flag =
true
;
}
if
( 0 ==
int
.Parse(value.ToString()))
flag =
false
;
return
flag;
}
public
object
ConvertBack(
object
value, Type targetType,
object
parameter, System.Globalization.CultureInfo culture)
{
if
((
bool
)value)
{
return
1;
}
else
return
0;
}
#endregion
}
|
//关键函数
public
T FindFirstVisualChild2<T>(DependencyObject obj,
string
childName)
where
T : DependencyObject
{
for
(
int
i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
{
DependencyObject child = VisualTreeHelper.GetChild(obj, i);
if
(child !=
null
&& child
is
T && child.GetValue(NameProperty).ToString() == childName)
{
return
(T)child;
}
else
{
T childOfChild = FindFirstVisualChild2<T>(child, childName);
if
(childOfChild !=
null
)
{
return
childOfChild;
}
}
}
return
null
;
}
|
效果图： 当选中第一项，然后单击"GetControlFromDataTemplate"按钮，则弹出第一项中控件的内容XiaoM。
本文转自Work Hard Work Smart博客园博客，原文链接：http://www.cnblogs.com/linlf03/archive/2011/09/09/2172370.html，如需转载请自行联系原作者
