CODEWITHSUNDEEP
c#wpf
user857521
user857521

Reputation:

Find WPF control by Name

I'm after some help finding the best way to refer to controls that have been programmtically built in C#

If I pre include a label in XAML and name it marketInfo then in code I can set the Tag property with something like 

marketInfo.Tag = timeNow;

However, I'm building controls and assigning each a name using something similar to 

System.Windows.Controls.Label lbl = new System.Windows.Controls.Label();
lbl.Content = market.name + " - " + DateTime.Now.ToLocalTime().ToLongTimeString();
lbl.HorizontalContentAlignment = System.Windows.HorizontalAlignment.Left;
lbl.Height = 40;
lbl.Name = @"_" + "marketInfo" + countMarket;

How do I refer to these controls from another method? I've read a few posts which suggest using the visualtreehelper but this appears to require looping controls to find a particular control. Is there a way to access a control by name to avoid looping?

eg something similar to

//pseudo code
SomeControl("_marketInfo5").Tag = timeNow;

Thank you

Upvotes: 15

Views: 42099

Answers (2)

Kevin Gosse
Kevin Gosse

Reputation: 39007

There's at least two ways to do that:

  • Use the FindName method of the parent container to find the control (but it'll internally involve looping, like the visualtreehelper)

  • Create a dictionary to store a reference for each control you create

    var controls = new Dictionary<string, FrameworkElement>();
controls.Add("_marketInfo5", lbl);

    Then you can do:

    controls["_marketInfo5"].Tag = timeNow;

Upvotes: 35

mehdi
mehdi

Reputation: 685

You can use XamlQuery for finding your controls at run-time.XamlQuery In CodePlex

XamlQuery.Search(RegisterGrid, "Label[Name=_marketInfo5]").SetValue(Control.TagProperty, timeNow);

Upvotes: 0

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