Question

我在groupbox中有几个文本框，我想循环遍历它们并从List（数组）中添加字符串。

我试过了：

foreach (var textBox in Controls.OfType<GroupBox>().SelectMany(groupBox1 => groupBox1.Controls.OfType<TextBox>()))
                   {
                       textBox.Text = List[counter];
                       counter++;
                   }

但它对我不起作用，没有任何反应。

Answer 1

这是一种方式：它假设组框中有多种类型的控件。如果只有文本框，则可以简化它。

private void button1_Click(object sender, EventArgs e)
{
    int Counter = 0;

    foreach (Control control in groupBox1.Controls)
    {
        TextBox textBox = control as TextBox;

        if (textBox != null)
            textBox.Text = Counter++.ToString();   
    }
}

Answer 2

试试这个

foreach(var groupBox in Controls.OfType<GroupBox>()) {
     foreach(var textBox in groupBox.Controls.OfType<TextBox>()) { 
    // Do Something 
    } 
}

Answer 3

你能尝试一下。

foreach (TextBox txt in Controls.OfType<GroupBox>().SelectMany(g=>g.Controls.OfType<TextBox>()).ToList())
        {
            //Write your logic here
        }

Answer 4

更清洁的方法是

foreach(Control control in groupBox1.Controls)
{
    // Check if the object is indeed what we need
    if(!(control is TextBox))
        continue;

    // "Cast" the object to a TextBox
    TextBox textBox = control as TextBox;

    // Do your thing with the textboxes
}

C＃循环通过GroupBox中的文本框

4 个答案: