Accessing inner controls of UserControl

I am building a custom UserControl which would allow me to place text inside a ProgressBar. The problem is, none of the ProgressBar's DependencyProperties get transferred over. Here is the XAML for my custom UserControl.

<UserControl
    x:Class = "MyProgram.MyCustomProgressBar"
    xmlns   = "http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x = "http://schemas.microsoft.com/winfx/2006/xaml" >

    <Grid>
        <ProgressBar    Name="uiProgressBar"    />
        <Label          Nam开发者_StackOverflow中文版e="uiLabel"          />
    </Grid>
</UserControl>

How can I access and set the Minimum, Maximum, Value, etc. from XAML when I start using this UseControl.

<local:MyCustomProgressBar x:Name="uiLoadTime" ??.uiProgressBar.Maximum="50" />

I am hoping I don't need to redefine a bunch of DependencyProperties in order to get this functionality.

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The usual way is to use a DependencyProperty... it's not so bad once you got used to it really.

Use the "propdp" built in snippet in the code-behind of your usercontrol.

Let's take the ProgressBar.Maximum example:

Make an integer dependencyproperty with a default value of 100 (or whatever you like), name it InnerProgressBarMax.

In your UserControl's XAML, you bind it this way:

<ProgressBar Maximum="{Binding InnerProgressBarMax, ElementName=myUsrCtrl}" />

When you use the control in another part of your application, simply enter a value like this:

<local:MyCustomProgressBar x:Name="uiLoadTime" InnerProgressBarMax="50" />

Rinse & repeat for each property you want to expose.

Edit: If you really need to have 50+ DP exposed, you could bring down the hastle by specifying smart default values for your DPs.

To do that, when you create a DP, set the parameter of new PropertyMetadata(YOUR_DEFAULT_VALUE)

Once that is done, your control may expose many DPs, but you'll only have to set a few manually in the XAML code that uses the control.

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The alternative to wrapping everything in DependencyProperties is to let the UserControl's consumer provide the ProgressBar. It could look like this:

<local:MyCustomProgressBar x:Name="uiLoadTime"> <local:MyCustomProgressBar.ProgressBar> <ProgressBar Maximum="50" /> </local:MyCustomProgressBar.ProgressBar> </local:MyCustomProgressBar>

Then in MyCustomProgressBar.xaml.cs, you would expose a public property for a ProgressBar. In its setter, modify the properties however you see fit, then add it to the UserControl's root Grid.