如何将textblock.前台绑定到变量？（WPF C#）
所以我希望修改我的程序，这样我就可以运行一个函数来检查前景色是黑色还是银色。我希望把那些“不可接近”的领域涂成灰色 我的表单当前看起来像： 我希望将“无需维护”字段“灰显”。但是我在数据模板中定义字体前景的绑定元素时遇到了问题 我尝试了一切，从在主窗口代码隐藏中定义IValueConverter类，到定义窗口键资源，但似乎无法在textblock元素本身的数据模板中实现这一点 如有任何建议/帮助，将不胜感激。谢谢 XAML：如何将textblock.前台绑定到变量？（WPF C#）,c#,wpf,visual-studio-2013,textblock,C#,Wpf,Visual Studio 2013,Textblock,所以我希望修改我的程序，这样我就可以运行一个函数来检查前景色是黑色还是银色。我希望把那些“不可接近”的领域涂成灰色 我的表单当前看起来像： 我希望将“无需维护”字段“灰显”。但是我在数据模板中定义字体前景的绑定元素时遇到了问题 我尝试了一切，从在主窗口代码隐藏中定义IValueConverter类，到定义窗口键资源，但似乎无法在textblock元素本身的数据模板中实现这一点 如有任何建议/帮助，将不胜感激。谢谢 XAML： C#代码隐藏： using System; using Sy
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Data.SqlClient;
namespace SiteMaintenance
{
public partial class MainWindow : Window
{
/**
* CLASS VARIABLES
* */
private SqlConnection localdbConnection; // Connection to Site Maintenance DB (LOCAL)
private System.Data.DataSet allSitesResults;
// MAIN THREAD
public MainWindow()
{
InitializeComponent();
// try to open SQL Connection
try {
localdbConnection = new SqlConnection(Properties.Settings.Default.localdb);
localdbConnection.Open();
} catch(Exception ex) {
System.Windows.MessageBox.Show("local SQL connection unable to connect");
return;
}
viewHistory_BTN.IsEnabled = false;
startMaintenance_BTN.IsEnabled = false;
startMaintenance_BTN.IsDefault = true;
}
/**
* Load dataset into datagrid
* LAZY LOADING
* */
private void DataGrid_Loaded(object sender, RoutedEventArgs e)
{
// init command object
SqlCommand myCommand = new SqlCommand();
myCommand.CommandText = "dbo.usp_GetSites";
myCommand.CommandType = System.Data.CommandType.StoredProcedure;
myCommand.Connection = localdbConnection;
// init data adaptor
SqlDataAdapter sites = new SqlDataAdapter();
sites.SelectCommand = myCommand;
//init DataSet
allSitesResults = new System.Data.DataSet();
sites.Fill(allSitesResults, "tblSites");
int tableCount = allSitesResults.Tables.Count;
System.Data.DataTable test = allSitesResults.Tables[0];
int rowCount = test.Rows.Count;
}
private void sites_DG_CurrentCellChanged(object sender, EventArgs e)
{
String siteName = allSitesResults.Tables[0].Rows[0][1].ToString();
}
private void allSites_LB_Loaded(object sender, RoutedEventArgs e)
{
// init command object
SqlCommand myCommand = new SqlCommand();
myCommand.CommandText = "dbo.usp_GetSitesANDCompletedDate";
myCommand.CommandType = System.Data.CommandType.StoredProcedure;
myCommand.Connection = localdbConnection;
// init data adaptor
SqlDataAdapter sites = new SqlDataAdapter();
sites.SelectCommand = myCommand;
//init DataSet
allSitesResults = new System.Data.DataSet();
sites.Fill(allSitesResults, "tblSites");
allSites_LB.ItemsSource = allSitesResults.Tables["tblSites"].DefaultView;
}
// do not allow selection of maintenance records that do not exist
private void allSites_LB_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
// grab the index
int selectedIndex = allSites_LB.SelectedIndex;
if (selectedIndex == -1) return; //WITHOUT THIS CHECK, UN-SELECTION WILL CAUSE LOGIC FAILURE
System.Data.DataRowView tempData = (System.Data.DataRowView)allSites_LB.Items[allSites_LB.SelectedIndex];
// grab the completed date field
String completedDate = tempData["CompletedDate"].ToString();
String siteMaintID = tempData["SiteMaintID"].ToString();
// remove selected index if completed date and site Maint ID is null
if (siteMaintID != "" && completedDate == "")
{
startMaintenance_BTN.IsEnabled = true;
}
else
{
allSites_LB.SelectedIndex = -1;
startMaintenance_BTN.IsEnabled = false;
}
}
private String maintRequired(object sender, SelectionChangedEventArgs e)
{
int selectedIndex = allSites_LB.SelectedIndex;
if (selectedIndex < 0) return null;
System.Data.DataRowView tempData = (System.Data.DataRowView)allSites_LB.Items[allSites_LB.SelectedIndex];
// grab the completed date field
String completedDate = tempData["CompletedDate"].ToString();
String siteMaintID = tempData["SiteMaintID"].ToString();
if (siteMaintID != "" && completedDate == "")
{
return "Maintenance Required";
}
else
{
return "No Maintenance";
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Data.SqlClient;
namespace SiteMaintenance
{
public partial class MainWindow : Window
{
/**
* CLASS VARIABLES
* */
private SqlConnection localdbConnection; // Connection to Site Maintenance DB (LOCAL)
private System.Data.DataSet allSitesResults;
// MAIN THREAD
public MainWindow()
{
InitializeComponent();
// try to open SQL Connection
try {
localdbConnection = new SqlConnection(Properties.Settings.Default.localdb);
localdbConnection.Open();
} catch(Exception ex) {
System.Windows.MessageBox.Show("local SQL connection unable to connect");
return;
}
viewHistory_BTN.IsEnabled = false;
startMaintenance_BTN.IsEnabled = false;
startMaintenance_BTN.IsDefault = true;
}
/**
* Load dataset into datagrid
* LAZY LOADING
* */
private void DataGrid_Loaded(object sender, RoutedEventArgs e)
{
// init command object
SqlCommand myCommand = new SqlCommand();
myCommand.CommandText = "dbo.usp_GetSites";
myCommand.CommandType = System.Data.CommandType.StoredProcedure;
myCommand.Connection = localdbConnection;
// init data adaptor
SqlDataAdapter sites = new SqlDataAdapter();
sites.SelectCommand = myCommand;
//init DataSet
allSitesResults = new System.Data.DataSet();
sites.Fill(allSitesResults, "tblSites");
int tableCount = allSitesResults.Tables.Count;
System.Data.DataTable test = allSitesResults.Tables[0];
int rowCount = test.Rows.Count;
}
private void sites_DG_CurrentCellChanged(object sender, EventArgs e)
{
String siteName = allSitesResults.Tables[0].Rows[0][1].ToString();
}
private void allSites_LB_Loaded(object sender, RoutedEventArgs e)
{
// init command object
SqlCommand myCommand = new SqlCommand();
myCommand.CommandText = "dbo.usp_GetSitesANDCompletedDate";
myCommand.CommandType = System.Data.CommandType.StoredProcedure;
myCommand.Connection = localdbConnection;
// init data adaptor
SqlDataAdapter sites = new SqlDataAdapter();
sites.SelectCommand = myCommand;
//init DataSet
allSitesResults = new System.Data.DataSet();
sites.Fill(allSitesResults, "tblSites");
allSites_LB.ItemsSource = allSitesResults.Tables["tblSites"].DefaultView;
}
// do not allow selection of maintenance records that do not exist
private void allSites_LB_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
// grab the index
int selectedIndex = allSites_LB.SelectedIndex;
if (selectedIndex == -1) return; //WITHOUT THIS CHECK, UN-SELECTION WILL CAUSE LOGIC FAILURE
System.Data.DataRowView tempData = (System.Data.DataRowView)allSites_LB.Items[allSites_LB.SelectedIndex];
// grab the completed date field
String completedDate = tempData["CompletedDate"].ToString();
String siteMaintID = tempData["SiteMaintID"].ToString();
// remove selected index if completed date and site Maint ID is null
if (siteMaintID != "" && completedDate == "")
{
startMaintenance_BTN.IsEnabled = true;
}
else
{
allSites_LB.SelectedIndex = -1;
startMaintenance_BTN.IsEnabled = false;
}
}
private String maintRequired(object sender, SelectionChangedEventArgs e)
{
int selectedIndex = allSites_LB.SelectedIndex;
if (selectedIndex < 0) return null;
System.Data.DataRowView tempData = (System.Data.DataRowView)allSites_LB.Items[allSites_LB.SelectedIndex];
// grab the completed date field
String completedDate = tempData["CompletedDate"].ToString();
String siteMaintID = tempData["SiteMaintID"].ToString();
if (siteMaintID != "" && completedDate == "")
{
return "Maintenance Required";
}
else
{
return "No Maintenance";
}
}
}
public class MaintenenceColorConverter : IValueConverter
{
public Color NormalColor { get; set; }
public Color NoMaintenanceRequiredColor { get; set; }
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value.ToString() == "No Maintenance Required") return NoMaintenanceRequiredColor.ToString();
return NormalColor.ToString();
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
使用系统；
使用System.Collections.Generic；
使用System.Linq；
使用系统文本；
使用System.Threading.Tasks；
使用System.Windows；
使用System.Windows.Controls；
使用System.Windows.Data；
使用System.Windows.Documents；
使用System.Windows.Input；
使用System.Windows.Media；
使用System.Windows.Media.Imaging；
使用System.Windows.Navigation；
使用System.Windows.Shapes；
使用System.Data.SqlClient；
命名空间站点维护
{
公共部分类主窗口：窗口
{
/**
*类变量
* */
专用SqlConnection localdbConnection；//到站点维护数据库的连接（本地）
private System.Data.DataSet所有站点结果；
//主线
公共主窗口（）
{
初始化组件（）；
//尝试打开SQL连接
试一试{
localdbConnection=newsqlconnection（Properties.Settings.Default.localdb）；
localdbConnection.Open（）；
}捕获（例外情况除外）{
System.Windows.MessageBox.Show（“本地SQL连接无法连接”）；
返回；
}
viewHistory_BTN.IsEnabled=false；
startMaintenance_BTN.IsEnabled=错误；
startMaintenance_BTN.IsDefault=真；
}
/**
*将数据集加载到数据网格中
*延迟加载
* */
已加载私有void数据网格（对象发送方，RoutedEventArgs e）
{
//初始化命令对象
SqlCommand myCommand=新的SqlCommand（）；
myCommand.CommandText=“dbo.usp_GetSites”；
myCommand.CommandType=System.Data.CommandType.StoredProcess；
myCommand.Connection=localdbConnection；
//初始化数据适配器
SqlDataAdapter站点=新的SqlDataAdapter（）；
sites.SelectCommand=myCommand；
//初始化数据集
allSitesResults=new System.Data.DataSet（）；
现场填充（所有现场结果，“TBLSite”）；
int tableCount=allSitesResults.Tables.Count；
System.Data.DataTable test=所有站点结果表[0]；
int rowCount=test.Rows.Count；
}
私有无效站点\u DG\u CurrentCellChanged（对象发送方，事件参数e）
{
字符串siteName=allSitesResults.Tables[0]。行[0][1]。ToString（）；
}
私有无效所有站点已加载（对象发送方、路由目标方）
{
//初始化命令对象
SqlCommand myCommand=新的SqlCommand（）；
myCommand.CommandText=“dbo.usp_getsite和completedDate”；
myCommand.CommandType=System.Data.CommandType.StoredProcess；
myCommand.Connection=localdbConnection；
//初始化数据适配器
SqlDataAdapter站点=新的SqlDataAdapter（）；
sites.SelectCommand=myCommand；
//初始化数据集
allSitesResults=new System.Data.DataSet（）；
现场填充（所有现场结果，“TBLSite”）；
allSites_LB.ItemsSource=allSitesResults.Tables[“tblSites”]。默认视图；
}
//不允许选择不存在的维护记录
private void allSites\u LB\u SelectionChanged（对象发送者，SelectionChangedEventArgs e）
{
//抓取索引
int selectedIndex=所有站点\u LB.selectedIndex；
如果（selectedIndex==-1）返回；//如果没有此检查，取消选择将导致逻辑失败
System.Data.DataRowView tempData=（System.Data.DataRowView）所有站点项[所有站点选择的索引]；
//抓取完成日期字段
字符串completedDate=tempData[“completedDate”].ToString（）；
字符串siteMaintID=tempData[“siteMaintID”].ToString（）；
//如果完成日期和站点维护ID为空，则删除所选索引
如果（siteMaintID！=“”&completedDate=“”）
{
startMaintenance_BTN.IsEnabled=真；
}
其他的
{
所有站点选择的索引=-1；
startMaintenance_BTN.IsEnabled=错误；
}
}
需要维护专用字符串（对象发送方，选择ChangedEventArgs e）
{
int selectedIndex=所有站点\u LB.selectedIndex；
if（selectedIndex<0）返回null；
System.Data.DataRowView tempData=（System.Data.DataRowView）所有站点项[所有站点选择的索引]；
//抓取完成日期字段
字符串completedDate=tempData[“completedDate”].ToString（）；
字符串siteMaintID=tempData[“siteMaintID”].ToString（）；
如果（siteMaintID！=“”&completedDate=“”）
{
返回“需要维护”；
}
其他的
{
返回“无维护”；
}
}
}
}比您要求的要多，但这是来自某些现有代码
<Style TargetType="ListViewItem">
<Style.Triggers>
<DataTrigger Binding="{Binding Path=IsMaintenance}" Value="True">
<Setter Property="Background" Value="Gainsboro" />
<Setter Property="Foreground" Value="Red" />
</DataTrigger>
<Trigger Property="IsSelected" Value="True" >
<Setter Property="FontWeight" Value="Bold" />
</Trigger>
</Style.Triggers>
</Style>
通常有两种很好的方法供您选择
<Style TargetType="TextBlock">
<Setter Property="Foreground" Value="Black" /> <!-- default value -->
<Style.Triggers>
<DataTrigger Binding="{Binding Text, RelativeSource={RelativeSource Self}" Value="No Maintenance Required">
<Setter Property="Foreground" Value="Gray" /> <!-- special behavior -->
</DataTrigger>
</Style.Triggers>
</Style>
public class MaintenaceColorConverter : IValueConverter
{
public Color NormalColor { get; set; }
public Color NoMaintenanceRequiredColor { get; set; }
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value.ToString() == "No Maintenance Required")
return NoMaintenanceRequiredColor;
return NormalColor;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
<Window.Resources>
<local:MaintenaceColorConverter x:Key="myColorConverter" NormalColor="Black" NoMaintenanceRequiredColor="Gray" />
</Window.Resources>
<TextBlock Text="{Binding MaintStatus}" Foreground="{Binding MaintStatus, Converter={StaticResource myColorConverter}}" />
XAML:
<Window x:Class="SiteMaintenance.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:SiteMaintenance"
Title="MainWindow"
Height="600"
Width="1000">
<Window.Resources>
<local:MaintenenceColorConverter x:Key="MyColorConverter" NormalColor="Black" NoMaintenanceRequiredColor="Gray" />
</Window.Resources>
<Grid Margin="0,0,2,0">
<ListBox x:Name="allSites_LB"
HorizontalAlignment="Left"
Height="400"
Margin="20,60,0,0"
VerticalAlignment="Top"
Width="945"
Loaded="allSites_LB_Loaded"
BorderThickness="1" SelectionChanged="allSites_LB_SelectionChanged"
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
>
<ListBox.ItemTemplate >
<DataTemplate >
<Border BorderBrush="Black" BorderThickness="0,0,0,1" Margin="-20,1,0,1" Padding="0,5,0,5" >
<Grid Margin="75,3" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="200" />
<ColumnDefinition Width="400" />
<ColumnDefinition Width="345" />
</Grid.ColumnDefinitions>
<TextBlock Text="{Binding SiteNo}" Grid.Column="0" FontSize="16" Foreground="{Binding MaintStatus, Converter={StaticResource MyColorConverter}}" />
<TextBlock Text="{Binding Address}" Grid.Column="1" FontSize="16" Margin="50,1" Foreground="{Binding MaintStatus, Converter={StaticResource MyColorConverter}}" />
<TextBlock Text="{Binding MaintStatus}" Grid.Column="2" FontSize="16" Foreground="{Binding MaintStatus, Converter={StaticResource MyColorConverter}}" />
</Grid>
</Border>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<Button x:Name="viewHistory_BTN"
Content="View History"
HorizontalAlignment="Left"
Height="52"
Margin="20,496,0,0"
VerticalAlignment="Top"
Width="172" FontSize="20"
/>
<Button x:Name="startMaintenance_BTN"
Content="Start Maintenance"
HorizontalAlignment="Left"
Height="52"
Margin="793,496,0,0"
VerticalAlignment="Top"
Width="172" FontSize="20"
/>
<TextBox x:Name="Site_Address"
HorizontalAlignment="Left"
Height="21"
Margin="51,39,0,0"
TextWrapping="Wrap"
Text="Site Number"
VerticalAlignment="Top"
Width="75"
BorderBrush="White"
IsReadOnly="True"
IsEnabled="False"
/>
<TextBox x:Name="Address_Title"
HorizontalAlignment="Left"
Height="21"
Margin="380,34,0,0"
TextWrapping="Wrap"
Text="Address"
VerticalAlignment="Top"
Width="75"
BorderBrush="White"
IsReadOnly="True"
IsEnabled="False"
/>
<TextBox x:Name="maint_Title"
HorizontalAlignment="Left"
Height="21"
Margin="699,34,0,0"
TextWrapping="Wrap"
Text="Maintenance Record"
VerticalAlignment="Top"
Width="117"
BorderBrush="White"
IsReadOnly="True"
IsEnabled="False"
/>
</Grid>
</Window>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Data.SqlClient;
namespace SiteMaintenance
{
public partial class MainWindow : Window
{
/**
* CLASS VARIABLES
* */
private SqlConnection localdbConnection; // Connection to Site Maintenance DB (LOCAL)
private System.Data.DataSet allSitesResults;
// MAIN THREAD
public MainWindow()
{
InitializeComponent();
// try to open SQL Connection
try {
localdbConnection = new SqlConnection(Properties.Settings.Default.localdb);
localdbConnection.Open();
} catch(Exception ex) {
System.Windows.MessageBox.Show("local SQL connection unable to connect");
return;
}
viewHistory_BTN.IsEnabled = false;
startMaintenance_BTN.IsEnabled = false;
startMaintenance_BTN.IsDefault = true;
}
/**
* Load dataset into datagrid
* LAZY LOADING
* */
private void DataGrid_Loaded(object sender, RoutedEventArgs e)
{
// init command object
SqlCommand myCommand = new SqlCommand();
myCommand.CommandText = "dbo.usp_GetSites";
myCommand.CommandType = System.Data.CommandType.StoredProcedure;
myCommand.Connection = localdbConnection;
// init data adaptor
SqlDataAdapter sites = new SqlDataAdapter();
sites.SelectCommand = myCommand;
//init DataSet
allSitesResults = new System.Data.DataSet();
sites.Fill(allSitesResults, "tblSites");
int tableCount = allSitesResults.Tables.Count;
System.Data.DataTable test = allSitesResults.Tables[0];
int rowCount = test.Rows.Count;
}
private void sites_DG_CurrentCellChanged(object sender, EventArgs e)
{
String siteName = allSitesResults.Tables[0].Rows[0][1].ToString();
}
private void allSites_LB_Loaded(object sender, RoutedEventArgs e)
{
// init command object
SqlCommand myCommand = new SqlCommand();
myCommand.CommandText = "dbo.usp_GetSitesANDCompletedDate";
myCommand.CommandType = System.Data.CommandType.StoredProcedure;
myCommand.Connection = localdbConnection;
// init data adaptor
SqlDataAdapter sites = new SqlDataAdapter();
sites.SelectCommand = myCommand;
//init DataSet
allSitesResults = new System.Data.DataSet();
sites.Fill(allSitesResults, "tblSites");
allSites_LB.ItemsSource = allSitesResults.Tables["tblSites"].DefaultView;
}
// do not allow selection of maintenance records that do not exist
private void allSites_LB_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
// grab the index
int selectedIndex = allSites_LB.SelectedIndex;
if (selectedIndex == -1) return; //WITHOUT THIS CHECK, UN-SELECTION WILL CAUSE LOGIC FAILURE
System.Data.DataRowView tempData = (System.Data.DataRowView)allSites_LB.Items[allSites_LB.SelectedIndex];
// grab the completed date field
String completedDate = tempData["CompletedDate"].ToString();
String siteMaintID = tempData["SiteMaintID"].ToString();
// remove selected index if completed date and site Maint ID is null
if (siteMaintID != "" && completedDate == "")
{
startMaintenance_BTN.IsEnabled = true;
}
else
{
allSites_LB.SelectedIndex = -1;
startMaintenance_BTN.IsEnabled = false;
}
}
private String maintRequired(object sender, SelectionChangedEventArgs e)
{
int selectedIndex = allSites_LB.SelectedIndex;
if (selectedIndex < 0) return null;
System.Data.DataRowView tempData = (System.Data.DataRowView)allSites_LB.Items[allSites_LB.SelectedIndex];
// grab the completed date field
String completedDate = tempData["CompletedDate"].ToString();
String siteMaintID = tempData["SiteMaintID"].ToString();
if (siteMaintID != "" && completedDate == "")
{
return "Maintenance Required";
}
else
{
return "No Maintenance";
}
}
}
public class MaintenenceColorConverter : IValueConverter
{
public Color NormalColor { get; set; }
public Color NoMaintenanceRequiredColor { get; set; }
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value.ToString() == "No Maintenance Required") return NoMaintenanceRequiredColor.ToString();
return NormalColor.ToString();
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}