Accessing WPF Template for Custom Control from Code behind
i am trying to access a named grid inside a default template for a custom control from code behind.
But it seems that the template for the control is null, even after calling ApplyTemplate(). Is that impossible inside the controls constuctor? Here's the code:Generic.xaml:
...
<ControlTemplate TargetType="{x:Type local:TimeTableControl}">
<Grid Name="ContentGrid">
开发者_StackOverflow </Grid>
</ControlTemplate>
...
TimeTableControl.cs:
public TimeTableControl()
{
ApplyTemplate();
contentGrid = (Grid)(Template.FindName("ContentGrid", this));
//Line above causes null-pointer-exception
...
}
You should move your code into an overridden OnApplyTemplate and use the GetTemplateChild method like so:
public class TimeTableControl {
private Grid contentGrid;
protected override void OnApplyTemplate() {
base.OnApplyTemplate();
contentGrid = GetTemplateChild("ContentGrid") as Grid;
}
}
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