* UIForm: 增加了查找页面的方法

SunnyUI.Demo/FMain.cs

@@ -88,6 +88,14 @@ namespace Sunny.UI.Demo
 
             Text = Version + " Build " + Properties.Resources.BuildDate;
             RegisterHotKey(UI.ModifierKeys.Shift, Keys.F8);
+
+            //根据页面类型获取页面
+            FButton page = GetPage<FButton>();
+            page?.Text.WriteConsole();
+
+            //根据页面索引获取页面
+            UIPage page1 = GetPage(1002);
+            page1?.Text.WriteConsole();
         }
 
         /// <summary>

SunnyUI.Demo/Forms/Frames/FCustomMain.cs

@@ -8,7 +8,8 @@
 
             //新建一个窗体，改继承Form为UIForm
             //窗体上只要放一个UITabControl，并关联到UIForm，这样多页面框架就已经打好了，其余的可以自由发挥
-            MainTabControl = uiTabControl1;
+            //窗体上如果只有一个UITabControl，也会自动关联，超过一个需要手动关联
+            //MainTabControl = uiTabControl1;
 
             //有三个UIPage，分别为：
             //FPage1，其属性PageIndex为1001
@@ -17,7 +18,7 @@
 
             //设置FTitlePage1为主页面，不能被关闭
             var mainPage = new FPage1();
-            MainTabControl.MainPage = mainPage.Text = "主页";
+            uiTabControl1.MainPage = mainPage.Text = "主页";
             AddPage(mainPage);
         }
 

SunnyUI/Common/UControl.cs

@@ -36,10 +36,11 @@ namespace Sunny.UI
     /// </summary>
     public static class ControlEx
     {
-        public static void ReStart(this Timer timer)
+        public static Timer ReStart(this Timer timer)
         {
             timer.Stop();
             timer.Start();
+            return timer;
         }
 
         public static Rectangle ScreenRectangle(this Control ctrl)
@@ -63,6 +64,27 @@ namespace Sunny.UI
             return ctrl as Form;
         }
 
+        public static Control SettingToCenter(this Control ctrl)
+        {
+            return ctrl.SettingToXCenter().SettingToYCenter();
+        }
+
+        public static Control SettingToXCenter(this Control ctrl)
+        {
+            if (ctrl != null && ctrl.Parent != null)
+                ctrl.Left = (ctrl.Parent.Width - ctrl.Width) / 2;
+
+            return ctrl;
+        }
+
+        public static Control SettingToYCenter(this Control ctrl)
+        {
+            if (ctrl != null && ctrl.Parent != null)
+                ctrl.Top = (ctrl.Parent.Height - ctrl.Height) / 2;
+
+            return ctrl;
+        }
+
         public static Form GetParentForm(this Control ctrl)
         {
             while (!IsForm(ctrl.Parent))
@@ -124,15 +146,17 @@ namespace Sunny.UI
             return pt;
         }
 
-        public static void ShowContextMenuStrip(this Control ctrl, ContextMenuStrip menu, Point offset)
+        public static ContextMenuStrip ShowContextMenuStrip(this Control ctrl, ContextMenuStrip menu, Point offset)
         {
             //设置显示的位置为鼠标所在的位置
             menu.Show(ctrl, offset);
+            return menu;
         }
 
-        public static void ShowContextMenuStrip(this Control ctrl, ContextMenuStrip menu, int offsetX, int offsetY)
+        public static ContextMenuStrip ShowContextMenuStrip(this Control ctrl, ContextMenuStrip menu, int offsetX, int offsetY)
         {
             menu.Show(ctrl, offsetX, offsetY);
+            return menu;
         }
 
         //https://www.codeproject.com/Tips/1264882/Extension-Methods-for-Multiple-Control-Tags

SunnyUI/Controls/UIDataGridView.cs

@@ -783,5 +783,10 @@ namespace Sunny.UI
             column.SortMode = sortMode;
             return column;
         }
+
+        public static bool IsDBNull(this DataGridViewCell cell)
+        {
+            return cell.Value is DBNull;
+        }
     }
 }

SunnyUI/Controls/UINavMenuHelper.cs

@@ -22,6 +22,7 @@
 
 using System;
 using System.Collections.Concurrent;
+using System.Collections.Generic;
 using System.Drawing;
 using System.Windows.Forms;
 
@@ -379,6 +380,32 @@ namespace Sunny.UI
             return null;
         }
 
+        public T GetPage<T>() where T : UIPage
+        {
+            List<T> result = GetPages<T>();
+            return result.Count > 0 ? result[0] : null;
+        }
+
+        public List<T> GetPages<T>() where T : UIPage
+        {
+            List<T> result = new List<T>();
+            foreach (var item in PageItems)
+            {
+                if (item.Key != null)
+                {
+                    var tabPage = item.Key;
+                    var pages = tabPage.GetControls<UIPage>();
+                    for (int i = 0; i < pages.Count; i++)
+                    {
+                        if (pages[i] is T pg)
+                            result.Add(pg);
+                    }
+                }
+            }
+
+            return result;
+        }
+
         public UIPage GetPage(Guid guid)
         {
             if (guid == Guid.Empty) return null;

SunnyUI/Controls/UITabControl.cs

@@ -223,6 +223,10 @@ namespace Sunny.UI
 
         public void AddPage(Guid guid, UITabControlMenu page) => Helper.AddPage(guid, page);
 
+        public T GetPage<T>() where T : UIPage => Helper.GetPage<T>();
+
+        public List<T> GetPages<T>() where T : UIPage => Helper.GetPages<T>();
+
         public string Version
         {
             get;

SunnyUI/Forms/UIForm.cs

@@ -30,6 +30,7 @@
  * 2022-01-03: V3.0.9 标题栏按钮可以设置颜色
  * 2022-02-09: V3.1.0 增加页面间传值方法SetParamToPage
  * 2022-03-19: V3.1.1 重构主题配色
+ * 2022-03-28: V3.1.1 增加了查找页面的方法
 ******************************************************************************/
 
 using System;
@@ -1978,57 +1979,44 @@ namespace Sunny.UI
 
         public UIPage AddPage(UIPage page)
         {
+            SetDefaultTabControl();
             page.Frame = this;
             MainTabControl?.AddPage(page);
             return page;
         }
 
-        public virtual void SelectPage(int pageIndex)
+        private UIForm SetDefaultTabControl()
         {
-            MainTabControl?.SelectPage(pageIndex);
+            if (MainTabControl == null)
+            {
+                List<UITabControl> ctrls = this.GetControls<UITabControl>();
+                if (ctrls.Count == 1) MainTabControl = ctrls[0];
             }
 
-        public virtual void SelectPage(Guid guid)
+            return this;
-        {
-            MainTabControl?.SelectPage(guid);
         }
 
-        public bool RemovePage(int pageIndex)
+        public virtual void SelectPage(int pageIndex) => SetDefaultTabControl().MainTabControl?.SelectPage(pageIndex);
-        {
-            return MainTabControl?.RemovePage(pageIndex) ?? false;
-        }
 
-        public bool RemovePage(Guid guid)
+        public virtual void SelectPage(Guid guid) => SetDefaultTabControl().MainTabControl?.SelectPage(guid);
-        {
-            return MainTabControl?.RemovePage(guid) ?? false;
-        }
 
-        public virtual void FeedbackFormPage(int fromPageIndex, params object[] objects)
+        public bool RemovePage(int pageIndex) => MainTabControl?.RemovePage(pageIndex) ?? false;
-        {
-        }
 
-        public UIPage GetPage(int pageIndex)
+        public bool RemovePage(Guid guid) => MainTabControl?.RemovePage(guid) ?? false;
-        {
-            return MainTabControl?.GetPage(pageIndex);
-        }
 
-        public UIPage GetPage(Guid guid)
+        public virtual void FeedbackFormPage(int fromPageIndex, params object[] objects) { }
-        {
-            return MainTabControl?.GetPage(guid);
-        }
 
-        public bool ExistPage(int pageIndex)
+        public UIPage GetPage(int pageIndex) => SetDefaultTabControl().MainTabControl?.GetPage(pageIndex);
-        {
-            return GetPage(pageIndex) != null;
-        }
 
-        public bool ExistPage(Guid guid)
+        public UIPage GetPage(Guid guid) => SetDefaultTabControl().MainTabControl?.GetPage(guid);
-        {
+
-            return GetPage(guid) != null;
+        public bool ExistPage(int pageIndex) => GetPage(pageIndex) != null;
-        }
+
+        public bool ExistPage(Guid guid) => GetPage(guid) != null;
 
         public bool SetParamToPage(int toPageIndex, int fromPageIndex, params object[] objects)
         {
+            SetDefaultTabControl();
             UIPage page = GetPage(toPageIndex);
             if (page == null) return false;
             return page.SetParam(fromPageIndex, objects);
@@ -2036,11 +2024,16 @@ namespace Sunny.UI
 
         public bool SetParamToPage(Guid toPageGuid, Guid fromPageGuid, params object[] objects)
         {
+            SetDefaultTabControl();
             UIPage page = GetPage(toPageGuid);
             if (page == null) return false;
             return page.SetParam(fromPageGuid, objects);
         }
 
+        public T GetPage<T>() where T : UIPage => SetDefaultTabControl().MainTabControl?.GetPage<T>();
+
+        public List<T> GetPages<T>() where T : UIPage => SetDefaultTabControl().MainTabControl?.GetPages<T>();
+
         #endregion IFrame实现
     }
 }