如何使用字符串变量-c＃获取标签名称

Question

I want to use a string variable to get a label name to change its text. for example, I have the following code:

string labelName = "lbl_text";
lbl_Heart_Rate.Invoke((MethodInvoker)(() => lbl_Heart_Rate.Text = displayValue.ToString()));

How do I use the string variable labelName to change the lbl_text's value?

Answer 1

You have to find Label Control from the list of form control for a given name.

var control = this.Controls.OfType<Label>()
                           .FirstOrDefault(c=>c.Name == labelName");

if(control != null)
{
    // Now you can play with your logic.
    control.Invoke((MethodInvoker)(() => control.Text = displayValue.ToString())); 
}

Answer 2

I think the form has a function for this: Control.ControlCollection.Find

Full Code:

string labelName = "lbl_text";
TextBox lbl_text = this.Controls.Find(labelName , true).FirstOrDefault() as TextBox;
//You can access 'lbl_text' here...