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要求是創建可重複使用的多選組合框自定義控件。爲了做到這一點,我通過代碼動態創建DataTemplate並設置了組合框ItemTemplate。我可以動態加載數據模板並設置ItemTemplate,但在選擇組合框時會出現未處理的異常(代碼:7054)。使用Silverlight 3.0動態創建DataTemplate時獲取未處理的異常
下面是代碼
Class MultiSelCombBox: ComboBox
{
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
CreateTemplate();
}
void CreateTemplate()
{
DataTemplate dt = null;
if (CreateItemTemplate)
{
if (string.IsNullOrEmpty(CheckBoxBind))
{
dt = XamlReader.Load(@"<DataTemplate xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' x:Name=""DropDownTemplate""><Grid xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' x:Name=""CheckboxGrid""><TextBox xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' x:Name=""test"" xml:space=""preserve"" Text='{Binding " + TextContent + "}'/></Grid></DataTemplate>") as DataTemplate;
this.ItemTemplate = dt;
}
}
}
//Other code goes here }}
我到底做錯了什麼?建議?