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我有一种方法可以重置表单上的一些控件。ToolStripStatusLabel除了命名的“tsStatusLabelInfo”之外，我能够使该方法正常工作。此控件不会传递给该resetForm()方法。

我相信它是 StatusStrip 控件的一部分，但我还没有弄清楚如何访问ToolStripStatusLabel控件来更新文本。

private void resetButton_Click(object sender, EventArgs e)
{
    Utilities.resetForm(this);
}

public static void resetForm(Control form)
{
    foreach(Control c in GetOffSprings(form))
    {
        if (c.Name == "folderTextBox")
        {
            ((TextBox)c).Clear();
        }
        else if (c.Name == "mfrListTextBox")
        {
            ((RichTextBox)c).Clear();
        }
        else if (c.Name == "mfrListDataGridView")
        {
            ((DataGridView)c).DataSource = null;
        }
        else if (c.Name == "onlyRadioButton")
        {
            ((RadioButton)c).Checked = true;
        }
        else if (c.Name == "usRadioButton")
        {
            ((RadioButton)c).Checked = true;
        }
        else if (c.Name == "otherYearsCheckedListBox")
        {
            ((CheckedListBox)c).SetItemCheckState(0, CheckState.Unchecked);
            ((CheckedListBox)c).SetItemCheckState(1, CheckState.Unchecked);
        }
        else if (c.Name == "yearComboBox")
        {
            ((ComboBox)c).Text = string.Empty;
        }
        else if (c.Name == "tsStatusLabelInfo")
        {
            //Control never pass
        }
        else if (c.Name == "statusStrip1")
        {
            // Exception:Object reference not set to an instance of an object
            ((StatusStrip)c).Controls["tsStatusLabelInfo"].Text = string.Empty;
        }
    }
}

//Loop through the control recursively getting all child controls
public static IEnumerable<Control> GetOffSprings(this Control @this)
{
    foreach(Control child in @this.Controls)
    {
        yield return child;

        //MessageBox.Show(child.Name);

        foreach (var offspring in GetOffSprings(child))
        {
            yield return offspring;
        }
    }
}
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1 回答 1

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正因为如此：https ://msdn.microsoft.com/en-us/library/system.windows.forms.toolstrip.controls(v=vs.110).aspx

该Controls集合不用于ToolStripand ToolStripContainer。您应该Items改用：https ://msdn.microsoft.com/en-us/library/system.windows.forms.toolstrip.items(v=vs.110).aspx

工具条上的项目不是Control对象。它们是ToolStripItem对象。在集合中递归循环Controls不会让您访问这些项目。

于 2015-04-23T17:12:17.157 回答