"无法确定呼叫者&QUOT的应用程序标识;对于ViewModelLocator [英] "Unable to determine application identity of the caller" for ViewModelLocator

问题描述

在App.xaml中，我有一个错误在定义ViewModelLocator。应用程序启动并运行良好，但它让我很烦，在Studio。想知道，有什么可以成为理由。亮的行是

 < VM：ViewModelLocator X：键=ViewModelLocatorD：IsDataSource =真/> 
  

错误：

错误1无法确定呼叫者的应用程序标识。

如果为VM内得到：ViewModelLocator，有没有错误的存在迹象。我应该重新检查我所有的ViewModels，并添加IsoStorage designtime保护？

 如果（！System.ComponentModel.DesignerProperties.IsInDesignTool）
 {
设置= IsolatedStorageSettings.ApplicationSettings; 
} 
  

解决方案

在万一有人有相同问题。只是建议：尽量在Blend中打开你的项目并附加VS它。你会立即看到，这里的问题是（通常，它是关于designtime期间访问IsoStorage）

编辑：更准确，加入的designMode检查解决我的问题高亮。

 公共ViewModelLocator（）
 {
如果（ViewModelBase.IsInDesignModeStatic）
返回; 
 
 **** 
  

In app.xaml, i have an error while defining ViewModelLocator. App launches and runs fine, but it annoys me in Studio. Wondering, what can be a reason. Highlighted line is

<vm:ViewModelLocator x:Key="ViewModelLocator" d:IsDataSource="True"/>

Error:

Error 1 Unable to determine application identity of the caller.

If to get inside of vm:ViewModelLocator, there's no sign of errors there. Should i re-check all my viewmodels and add IsoStorage designtime protection?

if (!System.ComponentModel.DesignerProperties.IsInDesignTool)
{
    settings = IsolatedStorageSettings.ApplicationSettings; 
}

解决方案

In case someone has the same issue. Just recommendation: try to open your project in Blend and attach VS to it. You'll immediately see, where problem is (usually, it is about accessing IsoStorage during designtime).

EDIT: to be more accurate, adding DesignMode check solves my problem with highlighting.

public ViewModelLocator()
    {
        if (ViewModelBase.IsInDesignModeStatic)
            return;

    ****

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