WPF：更改listview项目的背景颜色

Question

如何更改listview中项目的前景（甚至是后台会做）。 我有一个程序打开excel并检查给定表单中的断开链接。 我想向用户显示给定链接的列表，而且这些链接已被破坏。我想将前景改为RED。 我将这些值绑定到了observablecollection。该集合只是字符串的集合（WEB​​ LINKS），并且工作正常

我应该像here

那样进行多重绑定

修改： - 的  还有一个问题就是这个问题。创建属性并进行所有更改后。 WPF表单没有使用值进行更新。即列表框没有填满。着色都没有发生（不确定它是否也在发生。我无法看到它们）。

这是我的代码。请原谅我的编码，我是WPF的新手

<Window x:Class="URLValide.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:Local="clr-namespace:URL_Validater.URLValide"
Title="URL Validator" Height="269" Width="525" FontSize="13"
ResizeMode="NoResize">

<Window.Resources>
    <ResourceDictionary>
        <Style x:Key="HighLight" TargetType="{x:Type Control}">
            <Setter Property="Background" Value="Honeydew"/>
            <Setter Property="FontWeight" Value="UltraBlack"/>
            <Style.Triggers>
                <Trigger Property="IsFocused" Value="True">
                    <Setter Property="Effect">
                        <Setter.Value>
                            <DropShadowEffect BlurRadius="40" Color="Beige" Direction="50" Opacity="0.5"/>                                
                        </Setter.Value>
                    </Setter>
                    <Setter Property="Background" Value="White"/>
                </Trigger>
            </Style.Triggers>
        </Style>
    </ResourceDictionary>
</Window.Resources>

<DockPanel LastChildFill="True">
    <Label DockPanel.Dock="Top" Name="WinHeader"  Height="30" Background="BurlyWood" FontFamily="Calibri" FontSize="20" FontWeight="Bold" FontStretch="Medium" VerticalAlignment="Top" HorizontalAlignment="Stretch" Margin="0,0,0,0" HorizontalContentAlignment="Center" VerticalContentAlignment="Top">URL Validator</Label>
    <Grid DockPanel.Dock="Bottom" Background="Beige">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="auto"/>
            <ColumnDefinition Width="auto"/>
            <ColumnDefinition Width="auto"/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="20" MaxHeight="30"/>
        </Grid.RowDefinitions>
        <TextBlock Grid.Column="0" Text="Current URL:"></TextBlock>
        <TextBlock Grid.Column="1"  Text="{Binding strCrnUrl}"  Width="370"></TextBlock>
        <TextBlock Grid.Column="2"  Text="10 of 100" HorizontalAlignment="Left" VerticalAlignment="Center"></TextBlock>
    </Grid>
    <Grid DockPanel.Dock="Right" Width="154">
        <Grid.ColumnDefinitions>
            <ColumnDefinition MaxWidth="300" Width="19*" />
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition MaxHeight="55" MinHeight="10" Height="35*" />
            <RowDefinition Height="165*"  MinHeight="10"  />
        </Grid.RowDefinitions>

        <Label Name="LbleRight" BorderBrush="Black" BorderThickness="1" Margin="0,2" FontSize="13" Content="List Of URL's" Height="30" Grid.ColumnSpan="2" Grid.Row="0"></Label>
        <ListView Grid.Row="1" Background="Azure" ItemsSource="{Binding strPdfLst}" IsEnabled="True" Margin="0,0,0,1"></ListView>            
    </Grid>

    <Grid DockPanel.Dock="Left">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="100*"/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="30*" />
            <RowDefinition Height="60*" />                
        </Grid.RowDefinitions>            
        <Label BorderBrush="Black" Name="lblFleSel" BorderThickness="1" Height="27" Margin="2,2,0,30" HorizontalAlignment="Left" Width="349">Select File To which Contains the list of URL's:</Label>
        <TextBox Name="txtbxFleNme" BorderBrush="Black" BorderThickness="1" Margin="2,34,0,0" Style="{StaticResource ResourceKey=HighLight}" HorizontalAlignment="Left" Width="272"></TextBox>
        <Button Name="btnFleSlec" Width="69" Height="27" Content="Browse" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="276,32,4,0"></Button>
        <Grid Grid.Row="1" Height="118" HorizontalAlignment="Left" Margin="0,1,0,0" Name="OptionGrid" VerticalAlignment="Top" Grid.RowSpan="2">
            <StackPanel HorizontalAlignment="Left" VerticalAlignment="Top" Orientation="Horizontal">
                <Border BorderBrush="Black" BorderThickness="1" Height="117" Margin="3,1,0,0" HorizontalAlignment="Stretch" Width="350">
                    <!--<StackPanel HorizontalAlignment="Left" VerticalAlignment="Top" Width="162" Height="118">                        
                    </StackPanel>-->
                    <Grid Height="auto" HorizontalAlignment="Stretch" Width="335">
                        <Grid.RowDefinitions>
                            <RowDefinition Height="10*"/>
                            <RowDefinition Height="10*"/>
                            <RowDefinition Height="10*"/>
                            <RowDefinition Height="10*"/>
                            <RowDefinition Height="10*"/>
                        </Grid.RowDefinitions>
                        <CheckBox Name="chkboxHas" VerticalAlignment="Center" HorizontalAlignment="Center">Has Column Headers</CheckBox>
                        <Label Name="lblDesc" Height="auto" Margin="0,0,204,0" Grid.Row="1" HorizontalContentAlignment="Right" VerticalAlignment="Top">Description Column:</Label>
                        <ComboBox Grid.Row="1" Name="cmboxDescol"  Margin="131,0,0,0" Style="{StaticResource ResourceKey=HighLight}"></ComboBox>
                        <Label Name="lblUrlCol" Height="auto" Grid.Row="2" Margin="0,0,204,0" HorizontalContentAlignment="Right">URL's Column:</Label>
                        <ComboBox Name="cmboxUrlCol" Grid.Row="2" Margin="131,0,0,0" Style="{StaticResource ResourceKey=HighLight}"></ComboBox>
                        <Label Name="lblResCol" Height="auto" Grid.Row="3" Margin="0,0,196,0" HorizontalContentAlignment="Right">Result Column:</Label>
                        <ComboBox Name="cmboxResCol" Grid.Row="3" Margin="131,0,0,0" Style="{StaticResource ResourceKey=HighLight}"></ComboBox>
                        <Button Grid.Row="4" HorizontalAlignment="Center" VerticalAlignment="Center" Content="Validate URL links" Name="btnValidate"></Button>
                    </Grid>
                </Border>                    
            </StackPanel>
        </Grid>
    </Grid>
</DockPanel>

我不确定我是否应该发布完整的代码。但这是我的课 单击按钮将启动该程序。

我的班级代码： -

    Imports Microsoft
Imports System
Imports System.Net
Imports System.Data
Imports System.Windows
Imports System.Windows.Forms
Imports Excel = Microsoft.Office.Interop.Excel
Imports System.Collections.ObjectModel
Imports System.ComponentModel

Namespace URLValide

    Public Class clsUrlCheck
        Implements INotifyPropertyChanged

        Public Event propertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged

        Public exclApplic As New Excel.Application
        Public exclWkbOpe As Excel.Workbook
        Public exclWksAct As Excel.Worksheet
        Public exclRngUrl As Excel.Range
        Public exclRngDes As Excel.Range
        Public exclRngOut As Excel.Range
        Public intMaxRow As Long
        Public intCrtRow As Long
        Private _strTotlOf As String
        Private _strCrnUrl As String
        Private _ColorIndx As String
        Private _strPdfLst As ObservableCollection(Of String)
        Private _strhdrPdf As ObservableCollection(Of String)

#Region "Region of poperties"
        Public Property strTotlOf() As String
            Get
                Return _strTotlOf
            End Get
            Set(ByVal value As String)
                _strTotlOf = value
                Me.OnPropertyChanged("strTotlOf")
            End Set
        End Property

        Public Property strCrnUrl() As String
            Get
                Return _strCrnUrl
            End Get
            Set(ByVal value As String)
                _strCrnUrl = value
                Me.OnPropertyChanged("strCrnUrl")
            End Set
        End Property

        Public Property strPdfLst As ObservableCollection(Of String)
            Get
                Return _strPdfLst
            End Get
            Set(ByVal value As ObservableCollection(Of String))
                _strPdfLst = value
                Me.OnPropertyChanged("strPdfLst")
            End Set
        End Property

        Public Property strhdrPdf As ObservableCollection(Of String)
            Get
                Return _strhdrPdf
            End Get
            Set(ByVal value As ObservableCollection(Of String))
                _strhdrPdf = value
                Me.OnPropertyChanged("strhdrPdf")
            End Set
        End Property

        Public Property ColorIndx As String
            Get
                Return _ColorIndx
            End Get
            Set(ByVal value As String)
                _ColorIndx = value
                Me.OnPropertyChanged("ColorIndx")
            End Set
        End Property

        Private Sub OnPropertyChanged(ByVal propertyName As String)
            RaiseEvent propertyChanged(Me, New PropertyChangedEventArgs(propertyName))
        End Sub
#End Region

#Region "function of Validating the URL's"
        Public Function UrlCheck(ByVal strUrlReq As String)

            Try

                Dim WebReq As Net.HttpWebRequest = Net.HttpWebRequest.Create(strUrlReq)
                WebReq.Method = "Head"
                WebReq.Timeout = 5000
                Using Response = WebReq.GetResponse()
                    Return True
                End Using

            Catch ex As Exception
                ColorIndx = "True"
                Return False

            End Try

        End Function
#End Region

#Region "Start Function"
        Sub suStart()
            Dim blnValid As Boolean


            'strPdfLst.Clear()
            'strPdfLst = makeList(exclRngUrl.Column, False)
            If exclRngDes.Value = "Make Desc" Then
                strPdfLst = makeList(exclRngUrl.Column, True)
                exclRngDes.Delete()
            Else
                strPdfLst = makeList(exclRngUrl.Column, False)
            End If

            For Each exclRngEch As Excel.Range In exclRngUrl
                strCrnUrl = exclRngEch.Text
                strTotlOf = exclRngEch.Row & "OF" & intMaxRow
                blnValid = UrlCheck(exclRngEch.Value.ToString)
                If blnValid Then
                    exclWksAct.Cells(exclRngEch.Row, exclRngOut.Column).value = "Web Page Present"
                Else
                    exclWksAct.Cells(exclRngEch.Row, exclRngOut.Column).value = "Web Page Error"

                End If

            Next


        End Sub

        Function makeList(ByVal intColNum As Long, ByVal blnMkeStr As Boolean) As ObservableCollection(Of String)

            Dim ObsColTem As ObservableCollection(Of String) = New ObservableCollection(Of String)

            If Not blnMkeStr Then
                For intLopCnt As Int32 = intCrtRow To intMaxRow
                    ObsColTem.Add(exclWksAct.Cells(intLopCnt, intColNum).Text)
                Next
            Else
                For intLopCnt As Int32 = intCrtRow To intMaxRow
                    Dim strDesc As String = Mid(exclWksAct.Cells(intLopCnt, intColNum).Text, InStrRev(exclWksAct.Cells(intLopCnt, intColNum).Text, "/", , CompareMethod.Text) + 1)
                    ObsColTem.Add(strDesc)
                Next
            End If
            Return ObsColTem
        End Function
#End Region

    End Class
End Namespace

Answer 1

这是来自工作代码

<ListView.ItemContainerStyle>
    <Style TargetType="ListViewItem">
        <Style.Triggers>
            <DataTrigger Binding="{Binding Path=RowSelected}" Value="True">
                <Setter Property="Background" Value="Gainsboro"  />
                <Setter Property="FontWeight" Value="Bold" />
            </DataTrigger>
        </Style.Triggers>
    </Style>
</ListView.ItemContainerStyle>

Answer 2

创建一个转换器，它将链接作为参数并发送背景/前景色，转换器检查链接并相应地发送正确的代码，将颜色代码绑定到itemtemplate背景/前景属性。

Answer 3

首先创建一个可以绑定的Broken-Property，然后在Broken-Property上使用DataTrigger为ListViewItem创建一个Style！

<Style TargetType="{x:Type ListViewItem}">
<Style.Triggers>
            <DataTrigger Binding="{Binding Broken}" Value="True">
                <Setter Property="Background" Value="Red"/>
                <Setter Property="Foreground" Value="White"/>
            </DataTrigger>
</Style.Triggers>
</Style>

尚未测试此代码，但它应该可以使用！