SelectionItemPattern
支持SelectionItemPattern的控件有ListView、ListBox、RadioButton、GridView等。
SelectionItemPattern的三个重要方法：
- AddToSelection：将当前元素添加到所选项的集合。
- RemoveFromSelection: 从选定项的集合中移除当前元素。
- Select: 取消所有已选中的项，然后选择当前元素。
SelectionItemPattern的Current属性
可通过Current属性的IsSelected属性来判断AutomationElement是否被selected。
如下代码演示了使用SelectionItemPattern来操作RadioButton控件。
Code
| 1using System; 2using System.Text; 3using System.Diagnostics; 4using System.Threading; 5using System.Windows.Automation; 6 7namespace UIATest 8{ 9 class Program 10 { 11 static void Main(string[] args) 12 { 13 Process process = Process.Start(@"F:\CSharpDotNet\AutomationTest\ATP\WpfApp\bin\Debug\WpfApp.exe"); 14 int processId = process.Id; 15 16 AutomationElement element = FindElementById(processId, "radioButton1"); 17 SelectionItemPattern selectionItemPattern = GetSelectionItemPattern(element); 18 selectionItemPattern.Select(); 19 } 20 21 /**//// <summary> 22 /// Get the automation elemention of current form. 23 /// </summary> 24 /// <param name="processId">Process Id</param> 25 /// <returns>Target element</returns> 26 public static AutomationElement FindWindowByProcessId(int processId) 27 { 28 AutomationElement targetWindow = null; 29 int count = 0; 30 try 31 { 32 Process p = Process.GetProcessById(processId); 33 targetWindow = AutomationElement.FromHandle(p.MainWindowHandle); 34 return targetWindow; 35 } 36 catch (Exception ex) 37 { 38 count++; 39 StringBuilder sb = new StringBuilder(); 40 string message = sb.AppendLine(string.Format("Target window is not existing.try #{0}", count)).ToString(); 41 if (count > 5) 42 { 43 throw new InvalidProgramException(message, ex); 44 } 45 else 46 { 47 return FindWindowByProcessId(processId); 48 } 49 } 50 } 51 52 53 /**//// <summary> 54 /// Get the automation element by automation Id. 55 /// </summary> 56 /// <param name="windowName">Window name</param> 57 /// <param name="automationId">Control automation Id</param> 58 /// <returns>Automatin element searched by automation Id</returns> 59 public static AutomationElement FindElementById(int processId, string automationId) 60 { 61 AutomationElement aeForm = FindWindowByProcessId(processId); 62 AutomationElement tarFindElement = aeForm.FindFirst(TreeScope.Descendants, 63 new PropertyCondition(AutomationElement.AutomationIdProperty, automationId)); 64 return tarFindElement; 65 } 66 67 SelectItemPattern#region SelectItemPattern 68 69 /**//// <summary> 70 /// Get SelectItemPattern 71 /// </summary> 72 /// <param name="element">AutomationElement instance</param> 73 /// <returns>SelectItemPattern instance</returns> 74 public static SelectionItemPattern GetSelectionItemPattern(AutomationElement element) 75 { 76 object currentPattern; 77 if (!element.TryGetCurrentPattern(SelectionItemPattern.Pattern, out currentPattern)) 78 { 79 throw new Exception(string.Format("Element with AutomationId '{0}' and Name '{1}' does not support the SelectionItemPattern.", 80 element.Current.AutomationId, element.Current.Name)); 81 } 82 return currentPattern as SelectionItemPattern; 83 } 84 85 #endregion 86 } 87} 88 |
