Windows窗体面板中是否存在如何查找标签

Question

if (panel1.Contains(label1)) // if label1 is exist it shows label is exist if label2 is not exist then mean else part... how to identify it is not exist.
        {
            MessageBox.Show("Label 1 is Exist");
        }

mean to say my else part is not working if the label is not exist.

Answer 1

Just loop the container like this:

foreach(Control ctrl in panel1.Controls)
{
    // Check if control is of type label
    if(ctrl.GetType() == typeof(Label))
    {
        // check the name of the label
        if(ctrl.Name == "label1")
        {
            // do what ever you want
            MessageBox.Show("Label 1 existing");
        }
    }
}

You could also skip the type-check part and straight go for the name:

foreach(Control ctrl in panel1.Controls)
{
    if(ctrl.Name == "label1")
    {
        // check ctrl.Name
    }
}

Note: This is just looping direct controls. If there is a container inside panel1 you wont get its controls.