我是wpf和xaml(一般Windows开发)的新手,我的背景是asp.net,并且在那个经典asp之前。我正在研究一个应用程序,当处理发生时需要将按钮禁用/变为灰色,并在此处阅读帖子以执行以下操作,但它看起来不起作用。请有人帮助我,我失踪了吗?处理请求时禁用按钮
<Window x:Class="SCGen.Application.LoadForecast.EngineExecution"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:igEditors="http://infragistics.com/Editors"
SizeToContent="WidthAndHeight"
Title="Engine Execution"
ResizeMode="NoResize"
WindowStartupLocation="CenterOwner"
Background="{StaticResource {x:Static SystemColors.ControlBrushKey}}">
<Window.Resources>
<Style TargetType="{x:Type Button}" x:Key="myStyle" BasedOn="{StaticResource ButtonStyle}">
<Setter Property="Command" Value="{Binding ExecuteEngine}" />
<Setter Property="Content" Value="Execute Engine" />
<Style.Triggers>
<Trigger Property="Command" Value="{x:Null}">
<Setter Property="IsEnabled" Value="False"/>
</Trigger>
</Style.Triggers>
</Style>
</Window.Resources>
<Border Padding="8">
<StackPanel>
<StackPanel MaxWidth="200" HorizontalAlignment="Left">
<TextBlock Text="Select Forecast Engine" TextAlignment="Center" FontSize="13" />
<igEditors:XamComboEditor ItemsSource="{Binding ForecastEngines}" SelectedItem="{Binding SelectedEngine}" Margin="0,5" />
<Button Style="{StaticResource ResourceKey=myStyle}" />
</StackPanel>
<TextBlock Text="{Binding EngineStatus}" FontSize="15" FontStyle="Italic" Margin="0,14" Width="400" TextWrapping="Wrap" />
</StackPanel>
</Border>
谢谢
我已经改变了XAML为以下:
<Button Content="Execute Weather Import" Command="{Binding ExecuteWeather}" Style="{StaticResource ButtonStyle}" IsEnabled="{Binding IsEnabled}"/>
在视图模型我有以下几点:
private bool _isEnabled = true;
public bool IsEnabled
{
get { return _isEnabled; }
set { _isEnabled = value; }
}
和我设置_isEnabl在这里编辑:
private string LaunchWeatherImport(string strVendor)
{
_isEnabled = false;
string uri = ConfigurationManager.AppSettings["ManualExecutionFacilitatorService"];
ClientConnectionInfo connection = new ClientConnectionInfo(uri) { UseSecurity = true };
connection.SetTimeouts();
Logger.LogInfo("Calling Facilitator service to manually import " + strVendor + " weather data.");
((NetTcpBinding)connection.Binding).Security.Mode = System.ServiceModel.SecurityMode.None;
using (var client = new FacilitatorManualExecutionClient(connection))
{
client.InnerChannel.OperationTimeout = TimeSpan.FromMinutes(int.Parse(ConfigurationManager.AppSettings["OperationTimeOutMinutes"]));
try
{
_isEnabled = true;
return "success";
// uncomment this line before commit
//return client.ExecuteWeather(strVendor);
}
#region catch
catch (Exception ex)
{
Logger.LogError(ex.Message, ex);
return ex.Message;
}
#endregion
}
}
我仍然无法正常工作。对不起,不得不添加到此,但评论的回复字段不足以发布代码。
我想问题已经回答了,但我\'倒要指出的是,当使用命令您可以使用'CanExecute'方法来禁用与特定命令关联的控件。如果感兴趣,可以阅读[msdn](http://msdn.microsoft.com/en-us/library/system.windows.input.routedcommand.canexecute.aspx)上的一些信息。 – icebat 2012-03-12 15:18:59