我有一个带有动态ItemSource的RadAutoCompleteBox,它可以在某些地方工作,而不是其他地方。在SearchText的setter中,我运行搜索并填充ItemSource。在我正在处理的框中,当我尝试向其添加项目时,ItemSource的ObservableCollection给我“在System.Core.dll中抛出异常:'System.ArgumentException'”。此方法适用于其他地方的许多地方,如果我在其他地方手动设置SearchText,则违规代码运行时没有错误。任何帮助将不胜感激。
这是XAML:
<telerik:RadAutoCompleteBox
Grid.Column="2" Grid.Row="3"
x:Name="AutoCompleteBoxMakeModel"
ItemsSource="{Binding MakeModelCollection}"
SearchText="{Binding MakeModelTerm, Mode=TwoWay}"
SelectedItem="{Binding SelectedMakeModel, Mode=TwoWay}"
SelectionMode="Single"
HorizontalAlignment="Left"
TextSearchPath="Display"
TextSearchMode="Contains"
AutoCompleteMode="Suggest"
IsDropDownOpen="{Binding IsMakeModelDropDownOpen, Mode=TwoWay}"
DropDownItemTemplate="{StaticResource MakeModelSearchTemplate}"
DropDownWidth="300"
VerticalAlignment="Top" Width="275" Height="25" Margin="0,3,0,0" >
<telerik:StyleManager.Theme>
<telerik:VisualStudio2013Theme/>
</telerik:StyleManager.Theme>
</telerik:RadAutoCompleteBox>
这是违规代码:
private string makeModelTerm;
public string MakeModelTerm
{
get { return makeModelTerm; }
set
{
if (makeModelTerm == value)
{
return;
}
makeModelTerm = value;
RaisePropertyChanged("MakeModelTerm");
if (value.Length > 2)
{
SearchMakeModel(value);
}
}
}
private void SearchMakeModel(string value)
{
LookUpRepository er = new LookUpRepository();
var list = er.SearchMakeModel(value);
MakeModelCollection.Clear();
list.ForEach(MakeModelCollection.Add); // This triggers the System.ArgumentException on each value in list
this.IsMakeModelDropDownOpen = true;
}
您应该将委托传递给list.ForEach,如下所示。
list.ForEach(item => MakeModelCollection.Add(item));
供您参考,请在此处查看microsoft实现:
https://referencesource.microsoft.com/#mscorlib/system/collections/generic/list.cs,0e5a9cf0a310b9e5
TextSearchPath与模型不匹配。
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