以下是代码。在这里,我在按钮点击时动态添加2个文本框和一个按钮。我将文本框标记为动态创建按钮(删除)。所以点击删除按钮我需要删除标记到它的文本框。但只有1个文本框被删除而不是另一个。我无法找出原因。
private void button1_Click(object sender, EventArgs e)
{
int c=0;
int v;
v = c++;
panel1.VerticalScroll.Value = VerticalScroll.Minimum;
Button btn = new Button();
btn.Name = "btn" + v;
btn.Text = "Remove";
btn.Location = new Point(370, 5 + (30 * v));
btn.Click += new EventHandler(btn_Click);
TextBox txt = new TextBox();
txt.Name = "TextBox" + v;
txt.Location = new Point(30, 5 + (30 * v));
txt.Tag = btn;
TextBox txt1 = new TextBox();
txt1.Name = "TextBox2" + v;
txt1.Location = new Point(170, 5 + (30 * v));
txt1.Tag = btn;
panel1.Controls.Add(txt);
panel1.Controls.Add(txt1);
panel1.Controls.Add(btn);
}
private void btn_Click(object sender, EventArgs e)
{
//to remove control by Name
foreach (Control item in panel1.Controls.OfType<Control>())
{
if (item.Tag == sender || item == sender)
panel1.Controls.Remove(item);
}
}
答案 0 :(得分:0)
从列表中删除项目时,请尝试使用foreach
,而不是使用for
,然后向后迭代。以下问题有一些与本文类似的解决方案:
Safely Removing DataRow In ForEach
所以,像这样(我没有测试过这段代码,但这是一般的想法):
// Iterate over each control to remove, and remove it
for (int i = panel1.Controls.Count - 1; i >= 0; i--)
{
var item = panel1.Controls[i];
if (item.Tag == sender || item == sender)
panel1.Controls.Remove(item);
}