Tar*_*ryn 15 .net c# textbox winforms
我有一个winforms应用程序,在屏幕上有37个文本框.每一个都按顺序编号:
DateTextBox0
DateTextBox1 ...
DateTextBox37
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我试图遍历文本框并为每个文本框分配一个值:
int month = MonthYearPicker.Value.Month;
int year = MonthYearPicker.Value.Year;
int numberOfDays = DateTime.DaysInMonth(year, month);
m_MonthStartDate = new DateTime(year, month, 1);
m_MonthEndDate = new DateTime(year, month, numberOfDays);
DayOfWeek monthStartDayOfWeek = m_MonthStartDate.DayOfWeek;
int daysOffset = Math.Abs(DayOfWeek.Sunday - monthStartDayOfWeek);
for (int i = 0; i <= (numberOfDays - 1); i++)
{
//Here is where I want to loop through the textboxes and assign values based on the 'i' value
DateTextBox(daysOffset + i) = m_MonthStartDate.AddDays(i).Day.ToString();
}
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让我澄清一下,这些文本框出现在单独的面板上(其中37个).因此,为了让我循环使用foreach,我必须遍历主控件(面板),然后遍历面板上的控件.它开始变得复杂.
有关如何将此值分配给文本框的任何建议?
aba*_*hev 37
要以递归方式获取指定类型的所有控件和子控件,请使用以下扩展方法:
public static IEnumerable<TControl> GetChildControls<TControl>(this Control control) where TControl : Control
{
var children = (control.Controls != null) ? control.Controls.OfType<TControl>() : Enumerable.Empty<TControl>();
return children.SelectMany(c => GetChildControls<TControl>(c)).Concat(children);
}
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用法:
var allTextBoxes = this.GetChildControls<TextBox>();
foreach (TextBox tb in allTextBoxes)
{
tb.Text = ...;
}
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您可以循环显示表单中的所有控件,如果它是"文本框",则逐一返回它们的完整列表.
public List GetTextBoxes(){
var textBoxes = new List();
foreach (Control c in Controls){
if(c is TextBox){
textBoxes.add(c);
}
}
return textBoxes;
}
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由于这篇文章似乎会时不时地重新出现,并且由于上面的解决方案没有在控件内部(例如在组框中)找到控件,因此这将找到它们。只需添加您的控件类型:
public static IList<T> GetAllControls<T>(Control control) where T : Control
{
var lst = new List<T>();
foreach (Control item in control.Controls)
{
var ctr = item as T;
if (ctr != null)
lst.Add(ctr);
else
lst.AddRange(GetAllControls<T>(item));
}
return lst;
}
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及其用途:
var listBoxes = GetAllControls<ListBox>(this);
foreach (ListBox lst in listBoxes)
{
//Do Something
}
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