I am new to MVVM and having a problem

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I am new to MVVM and having a problem, I have a user control (view) that I would like to use in other user controls.

TextBoxView.xaml

<UserControl x:Class="SwTest.View.TextBoxView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:vm="clr-namespace:SwTest.ViewModel"
             mc:Ignorable="d" >

    <UserControl.DataContext>
        <vm:TextBoxViewModel />
    </UserControl.DataContext>

    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="110" />
            <ColumnDefinition Width="350" />
        </Grid.ColumnDefinitions>

        <TextBox Grid.Column="0" Text="{Binding TxtLabel}" />
        <TextBox Grid.Column="1" Text="{Binding EdtText}" />
    </Grid>
</UserControl>

TestScreenView.xaml

<UserControl x:Class="SwTest.View.TestScreenView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:v="clr-namespace:SwTest.View"
             xmlns:vm="clr-namespace:SwTest.ViewModel"
             mc:Ignorable="d" >

    <UserControl.DataContext>
        <vm:TestScreenViewModel />
    </UserControl.DataContext>

    <Grid>
        <v:TextBoxView TxtLabel="Label 1" />
        <v:TextBoxView TxtLabel="Label 2" />
    </Grid>
</UserControl>

The property TxtLabel is not found, I am using MVVM light. I have tyied using dependency property. I know I can make it work by puting the code in the codebehind file. Is there a correct way to do this in MVVM.

Thanks.

Posted 14-Nov-12 2:28am

Jorge Montoya

Updated 14-Nov-12 4:20am

v2

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Jorge Montoya 14-Nov-12 8:57am

The DataContext is
<usercontrol.datacontext>
<vm:textboxviewmodel>

the compiler still gives an error
"The Member "TextLabel" is not recognized or is not accesible"

Shmuel Zang 14-Nov-12 9:05am

It can be helpful if you post also the code of your TextBoxView control. Use "Improve question" above.

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Shmuel Zang · Answer 1 · 2012-11-14T02:47:00

What's the DataContext of your TextBoxView? It seems like you want to bind to the properties of the TextBoxView itself. So, you can set the DataContext of the TextBoxView to itself. Something like:

XML

<Grid>
    <v:TextBoxView DataContext="{Binding RelativeSource={RelativeSource Mode=Self}}"
                    TxtLabel="Label 1" />
    <v:TextBoxView DataContext="{Binding RelativeSource={RelativeSource Mode=Self}}"
                    TxtLabel="Label 2" />
</Grid>