在PropertyGrid中设置时间填写功能

PropertyGrid中如设置datetime类型字段，会自动使用DateTimePicker控件，但此DateTimePicker只能使用默认格式，无法输入时间。

使用PropertyGrid自定格式功能后，使用效果如下：
可以直接输入时间，或者点击下拉三角，调出 DateTimePicker控件选择时间

1. 定义PropertyGrid控件绑定的对象
   注意此处使用字符串类型，在MSSQL2008以上可以直接保存在time类型数据列中。
   
   C#

   public class AppSettings{ [Category("\t排程信息"), Editor(typeof(TimePickerEditor),typeof(UITypeEditor))] public string 开工时间 { get; set; } }

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   public class AppSettings{ [Category("\t排程信息"), Editor(typeof(TimePickerEditor),typeof(UITypeEditor))] public string 开工时间 { get; set; } }

2. 自定义控件编辑UI
   点击下拉三角后，出现DateTimePicker 控件，并设置此DateTimePicker  CustomFormat = “HH:mm” 。
   从PropertyGrid中取值，修改DateTimePicker值后更新回PropertyGrid。
   
   C#

   internal class TimePickerEditor : UITypeEditor { IWindowsFormsEditorService editorService; DateTimePicker picker = new DateTimePicker(); public TimePickerEditor() { picker.Format = DateTimePickerFormat.Custom; picker.CustomFormat = "HH:mm"; picker.ShowUpDown = true; } public override UITypeEditorEditStyle GetEditStyle(System.ComponentModel.ITypeDescriptorContext context) { return UITypeEditorEditStyle.DropDown;//显示下拉按钮 } public override object EditValue(System.ComponentModel.ITypeDescriptorContext context, IServiceProvider provider, object value) { string time; if (provider != null) { this.editorService = provider.GetService(typeof(IWindowsFormsEditorService)) as IWindowsFormsEditorService; } if (this.editorService != null) { if (value == null) { picker.Value = DateTime.Parse("00:00" as string); } else { time = value.ToString(); picker.Value = DateTime.Parse(time); } this.editorService.DropDownControl(picker); value = picker.Value.ToString("HH:mm"); } return value; } }

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   internal class TimePickerEditor : UITypeEditor { IWindowsFormsEditorService editorService; DateTimePicker picker = new DateTimePicker();   public TimePickerEditor() {     picker.Format = DateTimePickerFormat.Custom;     picker.CustomFormat = "HH:mm";     picker.ShowUpDown = true; }   public override UITypeEditorEditStyle GetEditStyle(System.ComponentModel.ITypeDescriptorContext context) {     return UITypeEditorEditStyle.DropDown;//显示下拉按钮 }   public override object EditValue(System.ComponentModel.ITypeDescriptorContext context, IServiceProvider provider, object value) {     string time;     if (provider != null)     { this.editorService = provider.GetService(typeof(IWindowsFormsEditorService)) as IWindowsFormsEditorService;     }     if (this.editorService != null)     { if (value == null) {     picker.Value = DateTime.Parse("00:00" as string); } else {     time = value.ToString();     picker.Value = DateTime.Parse(time); } this.editorService.DropDownControl(picker); value = picker.Value.ToString("HH:mm");     }     return value; } }

   
    
3. 设置PropertyGrid值更新事件，检查输入的时间格式合法性，并自动转换
   
   设置PropertyGrid值更新事件

   C#

   private void _mTaskGrid_PropertyValueChanged(object s, PropertyValueChangedEventArgs e) { var value = e.ChangedItem.Value; var obj = (AppSettings)((PropertyGrid)s).SelectedObject; switch (e.ChangedItem.Label.ToString()) { default: break; case "开工时间": try { var time = value.ToString().Substring(0, 5); obj.开工时间 = DateTime.Parse(time).ToString("HH:mm"); } catch (Exception ex) { DateTime dtDate; string time; if (value.ToString().Length < 2) { time = ("00"+value.ToString()).Substring(value.ToString().Length) + ":00"; }else { time = value.ToString().Substring(0,2) + ":00"; } if (DateTime.TryParse(time, out dtDate)) { obj.开工时间 = dtDate.ToString("HH:mm"); } else { MessageBox.Show("时间格式不正确(HH: mm)"); obj.开工时间 = "00:00"; } } break; } }

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   private void _mTaskGrid_PropertyValueChanged(object s, PropertyValueChangedEventArgs e) {     var value = e.ChangedItem.Value;     var obj = (AppSettings)((PropertyGrid)s).SelectedObject;     switch (e.ChangedItem.Label.ToString())     { default: break; case "开工时间":     try     { var time = value.ToString().Substring(0, 5); obj.开工时间 = DateTime.Parse(time).ToString("HH:mm");     }     catch (Exception ex)     { DateTime dtDate; string time; if (value.ToString().Length < 2) {     time = ("00"+value.ToString()).Substring(value.ToString().Length) + ":00"; }else {     time = value.ToString().Substring(0,2) + ":00"; }   if (DateTime.TryParse(time, out dtDate)) {     obj.开工时间 = dtDate.ToString("HH:mm"); } else {     MessageBox.Show("时间格式不正确(HH: mm)");     obj.开工时间 = "00:00"; }     }     break;     } }

   
    

参考资料：
https://stackoverflow.com/questions/4460489/choose-time-using-datetimepicker-in-propertygrid
https://blog.csdn.net/luyifeiniu/article/details/5426960

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