我有多个标签，如何在 C# 中以编程方式遍历它们

Question

我有多个标签（label1、label2、label3 等），我想以编程方式遍历它们。我在 vb.net 中完成了此操作，但同样在 C# 中不起作用。

我收到错误

An explicit conversion exist.

正确的做法是什么？

下面是适用于 VB.net 的代码，它适用于 C#

C#

UserControl uc1 = tabPage1.Controls["lblprice" + control];

vb.net

Do While count < 18

        Dim uc1 As UserControl = TabPage3.Controls("AbsenceUC" & count.ToString & "")
        Dim TxtEmployeeID As TextBox = uc1.Controls("txtEmpId")
        Dim TxtAbsenteeCode As TextBox = uc1.Controls("TextBox2")
        Dim txttext As String = TxtEmployeeID.Text
Loop

Answer 1

您可以使用以下代码遍历该表单上的所有标签：

var labels = tabPage1.Controls.OfType<Label>();
foreach (Label lbl in labels)
{
    // lbl.Content = "Do stuff here..."
}

错误是因为你需要转换结果。

Label uc1 = (Label)tabPage1.Controls["lblprice" + control];

Answer 2

你可以像这样遍历所有控件

 foreach (Control c in this.Controls)
  {
            if (c is Label) // Here check if the control is label 
            {
                c.BackColor = Color.Red; // you code goes here

            }
  }

Answer 3

while(count < 18)
{      
    //Find string key 
    var uc1 = tabPage3.Controls.Find("AbsenceUC", true).Where(x=> YOUR WHERE CLAUSE HERE).Single();

    //Cast your controls to TextBoxes
    TextBox TxtEmployeeID = uc1.Controls.Find("txtEmpId", true).Single() as TextBox;
    TextBox TxtAbsenteeCode = uc1.Controls.Find("TextBox2", true).Single() as TextBox;
    String txttext = TxtEmployeeID.Text;
}

我有多个标签，如何在 C# 中以编程方式遍历它们

I have multiple labels how do I go to loop through them programmatically in C#

.net

c#

vb.net