Question

I need to retrieve the text from a textbox within a custom control. The custom control is part of an ArrayList so there can be multiple custom controls displayed on a Form. How do I access the text from a single textbox within one of the controls in the ArrayList?

The code below shows how I’m creating the dynamic custom control:

    ArrayList assessmentInfo = new ArrayList();

    int length = (int)moduleInfoLevel6.numericUpDownModuleAssessmentNum.Value;
    for (int i = 0; i < length; i++)
    {
        assessmentInfo.Add(new AssessmentInfo());
        System.Drawing.Point p = new System.Drawing.Point(10, 160 + i * 32);
        (assessmentInfo[i] as AssessmentInfo).Location = p;
        (assessmentInfo[i] as AssessmentInfo).Size = new System.Drawing.Size(440, 32);                
        tabPageLevel6.Controls.Add((assessmentInfo[i] as AssessmentInfo));
    }

Here are screenshots showing how the custom control is displayed:

assessmentInfo custom control

https://i.stack.imgur.com/EjbRw.jpg

How the custom control is displayed on the form

https://i.stack.imgur.com/1hm1A.jpg

Answer 1

you could add a name to each control

something like:

(assessmentInfo[i] as AssessmentInfo).Name = "assessmentInfo" + i.ToString();

then you could access it in the following way

foreach (object control in tabPageLevel6.Controls)
{
    if (control is AssessmentInfo)
    {
        if ((control as AssessmentInfo).Name == "assessmentInfo1")
            // do something with the control
            MessageBox.Show((control as AssessmentInfo).Name);                    
    }
}