晚上,我在静态类中有以下代码,这有助于我的userInterface分部类.每当我到达检查组合框/文本框是否可见的部分时：

if (cb.Visible == true)

&安培;

if (tb.Visible == true)

即使控件在表单上可见,它也总是假的.

有任何想法吗？

谢谢

public static bool VerifyTableLayoutControlsContainData(TableLayoutPanel tlp)
    {
        foreach (Control input in tlp.Controls)
        {
            ComboBox cb = input as ComboBox;
            if(cb != null)
            {
                if (cb.Visible == true)
                {
                    if (string.IsNullOrEmpty(cb.SelectedItem.ToString()))
                    {
                        return false;
                    }
                }
            }

            TextBox tb = input as TextBox;
            if (tb != null)
            {
                if (tb.Visible == true)
                {
                    if (string.IsNullOrEmpty(tb.Text))
                    {
                        return false;
                    }
                }
            }
        }
        return true;
    }

EDIT1：

UserInterface代码

    private void uiBtnDataVerification_Click(object sender, EventArgs e)
    {
        if (VerifyingData != true)
        {
            AllInputsContainDataCsvFileVerificationStage = true;
            //Check all inputs have something in them
            InputsContainDataCsvFileVerificationStage();

            if (AllInputsContainDataCsvFileVerificationStage == false)
            {
                UiHelper.UpdateLog("One or more inputs has not been specified.", uiTxtOperationLog);
                return;
            }

            ...
        }
        else
        {
            //Cancel permanent cancellation token.
        }
    }

    public void InputsContainDataCsvFileVerificationStage()
    {

        ....

        if (UiHelper.VerifyTableLayoutControlsContainData(uiTableLayoutPanelColumnDataTypes)) { }
        else
        {
            AllInputsContainDataCsvFileVerificationStage = false;
        }

        ....
    }

原始代码在UiHelper类中

编辑2：根据汤姆斯的建议,我做了以下更改

public userInterface()
    {
        InitializeComponent();

        uiTableLayoutPanelColumnDataTypes.VisibleChanged += new EventHandler(notifyMe);
        uiCBColumn1DataType.VisibleChanged += new EventHandler(notifyMe1);

        SortedColumnNames = new List<TextBox>();
        SortedDataTypes = new List<ComboBox>();
        AllInputsContainDataCsvFileVerificationStage = true;
    }

    public void notifyMe1(object sender, EventArgs e)
    {
        bool temp = uiCBColumn1DataType.Visible;
        MessageBox.Show("its been changed");
    }

    public void notifyMe(object sender, EventArgs e)
    {
        bool temp = uiTableLayoutPanelColumnDataTypes.Visible;
        MessageBox.Show("its been changed");
    }

在单击按钮之前,我确定了cb1可见性属性设置为什么,它是真的.当我尝试通过原始方法检查时,我仍然是假的.

我很难受!!

EDIT3：

似乎当我点击第二个选项卡时,comboBox的visible属性= false.

有谁知道为什么会这样？

解决方法:

从我的评论：

The TableLayoutPanel control has to be visible on the screen when you run your verification code. If it’s behind an inactive TabPage, then it isn’t on the screen and the control will report the Visible property as false, regardless if the property is set to true in the designer.