WPF: Placeholder - wpf

Question

It's the following situation:
I've a WPF project with three textboxes. In these textboxes is the content something like this:
Textbox 1:
net.tcp://server1:61594/printerengine/printerserver
Textbox 2:
net.tcp://server1:61594/printerengine/printeradmin
Textbox 3:
net.tcp://server1:61594/printerengine/printeradmin
Because of the reason the paths stay the same all the time and only the server name changes, there should be an extra textbox for the server name only.
In the textbox 4 should be the server name filled in only:
Textbox 4:
server1
If you want to change the server name, it should be possible to change it in the textbox 4 and it should automatically rename the server name in the path in textbox 1-3.
I'm hoping you can understand me and give me a little bit help.
Greetings,
Lars
thank you for your answer. Not really sure if it would help me but I found this tutorial:
http://msdn.microsoft.com/de-de/library/system.windows.data.ivalueconverter.aspx
This is written in C# but I rewrote it to WPF:
This is my code:
Public Class DateConverter
Implements IValueConverter
Public Function Convert(value As Object, targetType As Type, parameter As Object) As Object
Dim [date] As DateTime = DirectCast(value, DateTime)
Return [date].ToShortDateString()
End Function
Public Function ConvertBack(value As Object, targetType As Type, parameter As Object) As Object
Dim strValue As String = value.ToString()
Dim resultDateTime As DateTime
If DateTime.TryParse(strValue, resultDateTime) Then
Return resultDateTime
End If
Return value
End Function
Public Function Convert1(value As Object, targetType As System.Type, parameter As Object, culture As System.Globalization.CultureInfo) As Object Implements System.Windows.Data.IValueConverter.Convert
End Function
Public Function ConvertBack1(value As Object, targetType As System.Type, parameter As Object, culture As System.Globalization.CultureInfo) As Object Implements System.Windows.Data.IValueConverter.ConvertBack
End Function
End Class
And this is my XAML:
<Window x:Class="MainWindow"
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>
<src:DateConverter x:Key="dateConverter"/>
<TextBlock Grid.Row="2" Grid.Column="0" Margin="0,0,8,0"
Name="startDateTitle"
Style="{StaticResource smallTitleStyle}">Start Date:</TextBlock>
<TextBlock Name="StartDateDTKey" Grid.Row="2" Grid.Column="1"
Text="{Binding Path=StartDate, Converter={StaticResource dateConverter}}"
Style="{StaticResource textStyleTextBlock}"/>
</Grid>
</Window>
Not really working. Anyone who can help me? Thank you.
Greetings,
Lars

Answer 1

Try to use StringFormat, something like this -
<TextBlock Text="{Binding Path=Text, ElementName=Textbox4Name,
StringFormat='net.tcp://\{0\}/printerengine/printerserver' />
refer - http://elegantcode.com/2009/04/07/wpf-stringformat-in-xaml-with-the-stringformat-attribute/