Control does not contain a definition for "xxx" when in an array of controls-CodePudding

I have an array of controls that I have created:

public static string[] ldcNames = new string[16] {"ledIndicator0", "ledIndicator1", "ledIndicator2", "ledIndicator3", "ledIndicator4", "ledIndicator5", "ledIndicator6", "ledIndicator7", "ledIndicator8", "ledIndicator9", "ledIndicator10", "ledIndicator11", "ledIndicator12", "ledIndicator13", "ledIndicator14", "ledIndicator15"};

In other arrays of General Winform controls that I have made, I can access the properties of the controls. The above Array is an array of LedIndicators from TA.Winforms.Controls package.

I access the other controls in this manner:

var lbl1 = this.Controls[Global.lblNames[rangeLabel]];` and `lbl1.Text = "xxxxx"

This works perfectly. Attempting to do the same for the LedIndicator control results in the following error: (Where "Cadence" is underlined with a red squiggly line in the VS IDE

var ld1 = this.Controls[Global.ldcNames[rowNum]];
ld1.Cadence = CadencePattern.SteadyOn;

Error CS1061 'Control' does not contain a definition for 'Cadence' and no accessible extension method 'Cadence' accepting a first argument of type 'Control' could be found.

I am able to access the standard properties but not any of the, I don't know, extended or unique properties of this control.

Completely lost here and desperately need help. Thanks in advance.

CodePudding user response：

As others have stated, you need to CAST the control to the correct type, LedIndicator in your case:

LedIndicator ld1 = (LedIndicator)this.Controls[Global.ldcNames[rowNum]];
ld1.Cadence = CadencePattern.SteadyOn;

You can also use the as keyword:

LedIndicator ld1 = this.Controls[Global.ldcNames[rowNum]] as LedIndicator;
ld1.Cadence = CadencePattern.SteadyOn;