C# UIC文本框随着鼠标单击或失去焦点而消失

iam在visual c express 2010中使用UIAutomation 我试图在UI applicton中自动输入文本框，我成功地选择了需要输入数据的窗口，但如果我切换窗口或更改聚焦字段，输入数据后会发生什么？文本突然消失这里是我处理的字段的UIspy日志

AutomationElement
General Accessibility
AccessKey:  ""
AcceleratorKey: ""
IsKeyboardFocusable:    "True"
LabeledBy:  "(null)"
HelpText:   ""

State
IsEnabled:  "True"
HasKeyboardFocus:   "False"

Identification
ClassName:  "Edit"
ControlType:    "ControlType.Edit"
Culture:    "(null)"
AutomationId:   "100"
LocalizedControlType:   "edit"
Name:   ""
ProcessId:  "5172 (Winpoint)"
RuntimeId:  "42 267278"
IsPassword: "False"
IsControlElement:   "True"
IsContentElement:   "True"

Visibility
BoundingRectangle:  "(611, 286, 90, 20)"
ClickablePoint: "(null)"
IsOffscreen:    "False"

  ControlPatterns
  Text
  DocumentRange
  Text: ""
  Length:   "0"
  Bounding Rectangles:  ""
  AnimationStyleAttribute:  "(not supported)"
  BackgroundColorAttribute: "16777215"
  BulletStyleAttribute: "(not supported)"
  CapStyleAttribute:    "None"
  CultureAttribute: "(not supported)"
  FontNameAttribute:    "Microsoft Sans Serif"
  FontSizeAttribute:    "8"
  FontWeightAttribute:  "400"
  ForegroundColorAttribute: "0"
  HorizontalTextAlignmentAttribute: "Left"
  IndentationFirstLineAttribute:    "(not supported)"
  IndentationLeadingAttribute:  "(not supported)"
  IndentationTrailingAttribute: "(not supported)"
  IsHiddenAttribute:    "(not supported)"
  IsItalicAttribute:    "False"
  IsReadOnlyAttribute:  "False"
  IsSubscriptAttribute: "(not supported)"
  IsSuperscriptAttribute:   "(not supported)"
  MarginBottomAttribute:    "(not supported)"
  MarginLeadingAttribute:   "(not supported)"
  MarginTopAttribute:   "(not supported)"
  MarginTrailingAttribute:  "(not supported)"
  OutlineStylesAttribute:   "(not supported)"
  OverlineColorAttribute:   "(not supported)"
  OverlineStyleAttribute:   "(not supported)"
  StrikethroughColorAttribute:  "(not supported)"
  StrikethroughStyleAttribute:  "None"
  TabsAttribute:    "(not supported)"
  TextFlowDirectionsAttribute:  "(not supported)"
  UnderlineColorAttribute:  "(not supported)"
  UnderlineStyleAttribute:  "None"

 Value
  Value:    ""
  IsReadOnly:   "False"

这是我正在使用的代码，当然我的目标是这个自动化id为100的文件

                    AutomationElement firstname = GetTextElement(appElement, "100");
                if (firstname != null)
                {
                    LogMessage("OK " + Environment.NewLine);
                    LogMessage("typing in  the first name...");

                    {


                        ValuePattern firstnameval =
                          firstname.GetCurrentPattern(ValuePattern.Pattern) as ValuePattern;
                        firstnameval.SetValue("basem22");
                      //  firstnameval.Text("basem");
                       // var textbox = AutomationElement(scope, id);
                        ValuePattern p = firstname.GetCurrentPattern(ValuePattern.Pattern) as ValuePattern;
                        p.SetValue("value");

---

因此，当我运行此代码时，该值会输入到文本框中，但如果我更改了foucs，它将消失我试图自动输入该表单并保存的任何想法。。谢谢

如果有人遇到同样的情况，我会简单地使用这个答案。我发现，如果按下键盘键，文本会被保存，不会消失，看起来像是某种wpf延迟或其他什么，这里是修复代码

//add a letter and delete so text stay
                        System.Windows.Forms.SendKeys.SendWait("A");
                        System.Windows.Forms.SendKeys.SendWait("{HOME}{DELETE}");