c# 以编程方式创建后删除标签

本文关键字:删除 标签 创建 方式 编程 | 更新日期: 2023-09-27 18:37:21

当我在数据库上搜索时,我使用以下代码在 panel1 上创建多个新标签。如果我删除数据库上的一个名称,是否有机会删除标签?

public void labelLocate(string name, string labelLocate, int x, int y)
{
    // name is the ID in the database
    var label = this.Controls.OfType<Label>().FirstOrDefault(l => l.Name == name);
    if (label != null) this.Controls.Remove(label);
    Label labelstring = new Label();
    labelstring.Width = 0;
    labelstring.Text = name;
    labelstring.Name = name;            
    labelstring.AutoSize = true;
    this.Controls.Remove(labelstring);
    this.Controls.Add(labelstring);
    labelstring.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
    labelstring.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
    labelstring.BringToFront();
    switch (labelLocate)
    {
        case "Up": labelstring.Location = new Point(x + (panel1.Location.X + 3), (y - 20) + (panel1.Location.Y + 3));
            break;
        case "Down": labelstring.Location = new Point(x + (panel1.Location.X + 3), (y) + 5 + (panel1.Location.Y + 3));
            break;
        case "Left": labelstring.Location = new Point(x - 5 - (labelstring.Width) + (panel1.Location.X + 3), y + 5 + (panel1.Location.Y + 3));
            break;
        case "Right": labelstring.Location = new Point(x + 10 + (panel1.Location.X + 3), y + 5 + (panel1.Location.Y + 3));
            break;
    }
}

c# 以编程方式创建后删除标签

您可以使用ControlCollection.Remove和LINQ:

var label = this.Controls.OfType<Label>().FirstOrDefault(l => l.Name == "TheID");
if(label != null)
    this.Controls.Remove(label); 

找到你的cotrol,然后:

if(label != null)
          label.Dispose();

您可以使用以下代码更轻松地删除标签:

this.Controls.Remove(label1); .

this是当前的形式。 Controls是位于表单上的标签、按钮等。 Remove()删除目标控件。