如何从textBox的名称中获取价值? [英] How to get value from textBox by its name?

问题描述

我想使用Control类通过textBox的名称获取值吗?有我的代码:

I am trying to get value from textBox by its name using Control class? There is my code:

Control ctl = FindControl(this，"B1");如果(ctl是TextBox)listBox1.Items.Add((((TextBox)ctl).Text); //"B1"-它是文本框名称

Control ctl = FindControl(this, "B1"); if (ctl is TextBox) listBox1.Items.Add(((TextBox)ctl).Text); //"B1" - it's textBox name

public static Control FindControl(Control parent, string ctlName)
    {
        foreach (Control ctl in parent.Controls)
        {
            if (ctl.Name.Equals(ctlName))
            {
                return ctl;
            }

            FindControl(ctl, ctlName);
        }
        return null;
    }

问题在于编译器没有进入该函数.可能是什么问题?

The problem is that the compiler does not go into the function. What could be the problem?

推荐答案

        public Form1()
        {
            InitializeComponent();
            B1.Text = "LOL";
            Control ctl = FindControl(this, "B1");
            if (ctl is TextBox)
                listBox1.Items.Add(((TextBox)ctl).Text);
        }
        public static Control FindControl(Control parent, string ctlName)
        {
            foreach (Control ctl in parent.Controls)
            {
                if (ctl.Name.Equals(ctlName))
                {
                    return ctl;
                }

                FindControl(ctl, ctlName);
            }
            return null;
        }

如果您像上面的示例中那样操作，那么一切都很好.
我想您使用Windows Froms.
P.S.我没有50的声誉，因此无法发表评论.
正确答案
如果TextBoxes位于FlowLayout上，则父级为FlowLayout，并且您需要在Control ctl = FindControl(this，"B1");行中使用FlowLayout名称而不是"this".因为"this"是MainWindow控件.

If you did it like in sample above then all be right.
I suppose you use Windows Froms.
P.S. I can't write a commentary because I haven't 50 reputation.
Correct Answer
If TextBoxes are on the FlowLayout then the parent is FlowLayout and you need use the FlowLayout name instead of "this" in line Control ctl = FindControl(this, "B1");. Because "this" it's the MainWindow control.

这篇关于如何从textBox的名称中获取价值?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！