我正在开发Windows Phone 7.1应用程序,并在Coding4fun库中使用PasswordInputPrompt
控件。 我初始化控件并为Completed
事件添加EventHandler,然后显示控件。
PasswordInputPrompt passwordInput = new PasswordInputPrompt
{
Title = "Application Password",
Message = "Please Enter App Password",
};
passwordInput.Completed += Pwd_Entered;
passwordInput.Show();
在Completed
事件处理程序中,我检查如果密码为空白,则我想保留提示。
void Pwd_Entered(object sender, PopUpEventArgs<string, PopUpResult> e)
{
if (!string.IsNullOrWhiteSpace(passwordInput.Value))
{
//Do something
}
else
{
passwordInput.Show(); //This is not working. Is this the correct way???
}
}
else
零件不起作用。即使输入的密码为空白,该提示也关闭。有人可以向我展示正确的方法吗?
我对此进行了一些快速测试,似乎有效。控件的源代码具有
public virtual void OnCompleted(PopUpEventArgs<T, TPopUpResult> result)
{
this._alreadyFired = true;
if (this.Completed != null)
this.Completed((object) this, result);
if (this.PopUpService != null)
this.PopUpService.Hide();
if (this.PopUpService == null || !this.PopUpService.BackButtonPressed)
return;
this.ResetWorldAndDestroyPopUp();
}
暗示您可以覆盖方法。
因此,创建一个从控制
继承的类public class PasswordInputPromptOveride : PasswordInputPrompt
{
public override void OnCompleted(PopUpEventArgs<string, PopUpResult> result)
{
//Validate for empty string, when it fails, bail out.
if (string.IsNullOrWhiteSpace(result.Result)) return;
//continue if we do not have an empty response
base.OnCompleted(result);
}
}
在您的代码后面:
PasswordInputPrompt passwordInput;
private void PasswordPrompt(object sender, System.Windows.Input.GestureEventArgs e)
{
InitializePopup();
}
private void InitializePopup()
{
passwordInput = new PasswordInputPromptOveride
{
Title = "Application Password",
Message = "Please Enter App Password",
};
passwordInput.Completed += Pwd_Entered;
passwordInput.Show();
}
void Pwd_Entered(object sender, PopUpEventArgs<string, PopUpResult> e)
{
//You should ony get here when the input is not null.
MessageBox.Show(e.Result);
}
XAML触发密码提示
<Grid VerticalAlignment="Top" x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<Button Content="ShowPasswordPrompt" Tap="PasswordPrompt"></Button>
</Grid>