Question

我有两个文本框。我想将第一个文本框镜像到第二个文本框，但是如果您在镜像文本后手动更新第二个框，则无论您是否再次更新第一个文本框，它都应保持不变。

<TextBox x:Name="TextBoxUserLogonNameUPN" HorizontalAlignment="Left" Height="23" Margin="10,41,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="300"/>
<TextBox x:Name="TextBoxUserLogonNameSamAccountName" HorizontalAlignment="Left" Height="23" Margin="326,100,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="310" Text="{Binding Path=Text, ElementName=TextBoxUserLogonNameUPN, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}"/>

我已经尝试了上面的方法，但是在Binding中使用Mode = OneWay。如果我第二次更新第一个文本框，则在手动更新第二个文本框后，它将擦除第二个文本框并再次镜像。

我正在使用WPF和PowerShell。如果无法在Xaml中完成，我很乐意通过Powershell进行管理。

Answer 1

假设textbox1丢失focus是应将textbox1文本复制到textbox2的事件，那么此代码应该对您有用。所有动作都在函数textBox1_LostFocus中。第一次使用时，只需将textbox2 Tag属性设置为您要通过第二次及以后测试的值即可

注意：该表单有两个标签和两个文本框

WpfWindow1.xaml.ps1是该程序的入口点

WpfWindow1.xaml.ps1

function Add-ControlVariables {

New-Variable -Name 'textBox1' -Value $window.FindName('textBox1') -Scope 1 -Force   
New-Variable -Name 'textBox2' -Value $window.FindName('textBox2') -Scope 1 -Force
}

function Load-Xaml {
    [xml]$xaml = Get-Content -Path $PSScriptRoot\WpfWindow1.xaml
    $manager = New-Object System.Xml.XmlNamespaceManager -ArgumentList $xaml.NameTable
    $manager.AddNamespace("x", "http://schemas.microsoft.com/winfx/2006/xaml");
    $xaml.SelectNodes("//*[@x:Name='textBox1']", $manager)[0].RemoveAttribute('TextChanged')
    $xaml.SelectNodes("//*[@x:Name='textBox2']", $manager)[0].RemoveAttribute('TextChanged')
    $xaml.SelectNodes("//*[@x:Name='textBox1']", $manager)[0].RemoveAttribute('LostFocus')
    $xamlReader = New-Object System.Xml.XmlNodeReader $xaml
    [Windows.Markup.XamlReader]::Load($xamlReader)
}

function Set-EventHandlers {

    $textBox1.add_TextChanged({
        param([System.Object]$sender,[System.Windows.Controls.TextChangedEventArgs]$e)
        textBox1_TextChanged($sender,$e)
    })
    $textBox2.add_TextChanged({
        param([System.Object]$sender,[System.Windows.Controls.TextChangedEventArgs]$e)
        textBox2_TextChanged($sender,$e)
    })
    $textBox1.add_LostFocus({
        param([System.Object]$sender,[System.Windows.RoutedEventArgs]$e)
        textBox1_LostFocus($sender,$e)
    })
}

$window = Load-Xaml
Add-ControlVariables
Set-EventHandlers

function textBox1_TextChanged
{
    param($sender, $e)
    #do stuff you want to do when textBox1.Text changes
}

function textBox2_TextChanged
{
    param($sender, $e)

    #do stuff you want to do when textBox2.Text changes
}

function textBox1_LostFocus
{
    param($sender, $e)

    if ($textBox2.Tag -ne "mirrored")
    {
        #turn off textBox2 TextChanged event so that code in textBox2_TextChanged is not executed
        $textBox2.remove_TextChanged({
            param([System.Object]$sender,[System.Windows.Controls.TextChangedEventArgs]$e)
            textBox2_TextChanged($sender,$e)
        })

        $textBox2.Text = $sender.Text
        $textBox2.Tag = "mirrored"

        #turn textBox2 TextChanged event back on
        $textBox2.add_TextChanged({
            param([System.Object]$sender,[System.Windows.Controls.TextChangedEventArgs]$e)
            textBox2_TextChanged($sender,$e)
        })
    }
}


$window.ShowDialog()

WpfWindow1.xaml

<Window

  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

  Title="MainWindow" Height="350" Width="525">

    <Grid>
        <TextBox x:Name="textBox1" HorizontalAlignment="Left" Height="29" Margin="79,45,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="132" TextChanged="textBox1_TextChanged" LostFocus="textBox1_LostFocus"/>
        <TextBox x:Name="textBox2" HorizontalAlignment="Left" Height="29" Margin="298,45,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="105" TextChanged="textBox2_TextChanged"/>
        <Label Content="Text1:" HorizontalAlignment="Left" Height="25" Margin="32,45,0,0" VerticalAlignment="Top" Width="63"/>
        <Label Content="Text2:" HorizontalAlignment="Left" Height="25" Margin="242,45,0,0" VerticalAlignment="Top" Width="56"/>

    </Grid>

</Window>

WPF和Powershell：镜像/同步文本框

1 个答案: