在运行时创建标签

使用此代码，我可以在运行时创建标签：

ArrayList CustomLabel = new ArrayList(); foreach (string ValutaCustomScelta in Properties.Settings.Default.ValuteCustom) { CustomLabel.Add(new Label()); (CustomLabel[CustomLabel.Count - 1] as Label).Location = new System.Drawing.Point(317, 119 + CustomLabel.Count*26); (CustomLabel[CustomLabel.Count - 1] as Label).Parent = tabPage2; (CustomLabel[CustomLabel.Count - 1] as Label).Name = "label" + ValutaCustomScelta; (CustomLabel[CustomLabel.Count - 1] as Label).Text = ValutaCustomScelta; (CustomLabel[CustomLabel.Count - 1] as Label).Size = new System.Drawing.Size(77, 21); Controls.Add(CustomLabel[CustomLabel.Count - 1] as Control); } 

我需要在tabPage2上创建标签，但这行不起作用：

  (CustomLabel[CustomLabel.Count - 1] as Label).Parent = tabPage2; 

哪个是在运行时在tabPage2上创建标签的正确指令？ （我使用visual studio 2010，windows窗体）

Answer 1

您需要将标签添加到选项卡页面的Controls集合：

 tabPage2.Controls.Add(CustomLabel[CustomLabel.Count - 1] as Control); 

顺便说一句：你不应该使用ArrayList 。 而是使用List 。 此外，首先初始化标签，然后将其添加到列表中。 这使您的代码更具可读性：

 List customLabels = new List(); foreach (string ValutaCustomScelta in Properties.Settings.Default.ValuteCustom) { Label label = new Label(); label.Location = new System.Drawing.Point(317, 119 + customLabels.Count*26); label.Parent = tabPage2; label.Name = "label" + ValutaCustomScelta; label.Text = ValutaCustomScelta; label.Size = new System.Drawing.Size(77, 21); customLabels.Add(label); tabPage2.Controls.Add(label); }