Question

I’ve created a custom UserControl which consists of 12 labels.

Now, when the program loads, the labels with “Default” as the content need to be changed.

// This is called in my main forms constructor, right before InitializeComponent()
public void ShowRigInfo()
{
    // This is here because if I try to call PopluateLabels, I get an "Object not
    // set to an instance of object" error
    grdRigInfo = new RigInfoGrid();

    var contractor = SplitString("contractor", _rigInfo);
    var projectName = SplitString("projectname", _rigInfo);
    var location = SplitString("location", _rigInfo);
    var operatorName = SplitString("operator", _rigInfo);
    var rigName = SplitString("rigsite_name", _rigInfo);
    var rigManager = SplitString("rigmanager", _rigInfo);

    grdRigInfo.PopulateLabels(contractor, projectName, location, operatorName,
                              rigName, rigManager);
    }

// A public method of my custom UserControl to update label content
public void PopulateLabels(string contractor, string project, string location, 
                           string operatorName, string rigName, string manager)
{
    lblContractor.Content = contractor;
    lblProjectName.Content = project;
    lblLocation.Content = location;
    lblOperator.Content = operatorName;
    lblRigName.Content = rigName;
    lblRigManager.Content = manager;            
}

My question is, how can I get the labels to update upon program start up? Thanks for any and all help.

EDIT

I have tried to call ShowRigInfo() both before and after InitializeComponent() of my main form. Neither of them changed the labels.

EDIT 2

Okay, I solved this before I actually saw the answers. What I did was moved my ShowRigInfo() into my custom UserControl, instead of my main form. I don’t know why I didn’t do that from the start, but there it is. I’ll be looking into the DataBinding portion of the answers. Thank you guys.

Answer 1

Well, because this is WPF, I would recommend binding those labels to properties in some sort of model which supports (implements) INotifyPropertyChanged.

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