wpf custom control 不显示

Question

各位老师好！   我做了一个wpf的自定义控件（custom control）。
Generic.xaml文件代码如下：
<ResourceDictionary
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:FileSelectorControl">
    <Style TargetType="{x:Type local:FileSelector}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type local:FileSelector}">
                    <Border Background="{TemplateBinding Background}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}">
                     
                            <ScrollViewer  Name="scrolls" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto">
                                <ScrollViewer.Content>
                                    <StackPanel Name= "multi_item" Orientation="Vertical" ScrollViewer.VerticalScrollBarVisibility="Auto">
                                        <StackPanel Orientation="Horizontal" Height="30" Margin="0,5,0,0">
                                            <Button Name="add_item" Content="增加" Margin="5,0,0,0" Width="80" ></Button>
                                            <Button Name="del_item" Content="删除" Margin="5,0,0,0" Width="80"  />
                                        </StackPanel>                                        <StackPanel Name="stack_static" Orientation="Horizontal" Height="30" Margin="0,5,0,0">
                                            <TextBox Name="textBox_FileFullName"  Margin="5,0,5,0" Width="330"></TextBox>
                                            <Label Content="名称"    Margin="5,0,5,0"></Label>
                                            <TextBox Name="displayName" Margin="5,0,5,0" Width="200"></TextBox>
                                            
                                            <Button Name="button_browser"  Content="浏览"/>
                                        </StackPanel>                                        <StackPanel Name="dynamic_item">
                                        </StackPanel>
                                    </StackPanel>
                                </ScrollViewer.Content>
                            </ScrollViewer>                        
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>
类的代码如下FileSelector.csusing System;
using System.Linq;              //程序用到LINQ 
using System.Windows;           //TemplatePartAttribute
using System.Collections.Generic;
using System.Windows.Controls;  //Control
using System.Windows.Input;     //RoutedUICommand
using Microsoft.Win32;          //对话框OpenFileDialognamespace FileSelectorControl
{
    [TemplatePart(Name = "textBox_FileFullName", Type = typeof(TextBox))]
    public class FileSelector : Control
    {
        static FileSelector()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(FileSelector), new FrameworkPropertyMetadata(typeof(FileSelector)));
        }        public FileSelector():base()
        {
          
        }
               #region 控件模板        
        Button add_item;
        Button del_item;
        Button btn1;
        StackPanel multi_item;
        StackPanel dynamic_item;        TextBox tbx ;
        
        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();            add_item = Template.FindName("add_item", this) as Button;
            del_item = Template.FindName("del_item", this) as Button;            add_item.Click += new RoutedEventHandler(add_item_click);
            del_item.Click += new RoutedEventHandler(del_item_click);            btn1 = Template.FindName("button_browser",this) as Button;
            btn1.Click += new RoutedEventHandler(btn_click);            multi_item = Template.FindName("stackPanel_multiItem", this) as StackPanel;
            dynamic_item = Template.FindName("stackPanel_dynamicItem", this) as StackPanel;            
            tbx = Template.FindName("textBox_FileFullName", this) as TextBox;
        }        #endregion        #region 对话框处理        public string PredefinedExts { get; set; }        string GetFilterString(out string first)
        {
            first = null;
            var exts = PredefinedExts.Split(new string[] { "," }, StringSplitOptions.RemoveEmptyEntries);
            string head = string.Empty;
            if (exts.Length != 0)
            {
                var trim = exts.Where(s => s.Trim() != String.Empty);
                first = trim.FirstOrDefault();
                head = String.Join("|", trim.Select(s => String.Format("{0}文件|*.{1}", s.ToUpper(), s.ToLower())));
            }            if (head != String.Empty)
                head += "|";            return head + "所有文件|*.*";
        }        string OpenDialog()
        {
            var dlg = new OpenFileDialog();
            string defExt;
            dlg.Filter = GetFilterString(out defExt);
            dlg.DefaultExt = defExt;            if (dlg.ShowDialog() == true)
                return dlg.FileName;
            return null;
        }        #endregion                     void add_item_click(object sender, RoutedEventArgs e)
        {
            StackPanel panel = new StackPanel();
            panel.Orientation = Orientation.Horizontal;
            panel.Margin = new Thickness(0, 5, 0, 0);            TextBox tbx = new TextBox();
            tbx.Width = 330;
            tbx.Height = 30;            tbx.Margin = new Thickness(5, 0, 5, 0);
            Button btn = new Button();            
            btn.Content = "浏览";
            btn.Click += new RoutedEventHandler(btn_click);
            
            panel.Children.Add(tbx);
            panel.Children.Add(btn);            //multi_item.Children.Remove();            dynamic_item.Children.Add(panel);
            
        }
        void del_item_click(object sender, RoutedEventArgs e)
        {
            int count = dynamic_item.Children.Count;
            if(count>0){
                dynamic_item.Children.RemoveAt(count-1);
            }            
        }        void btn_click(object sender,RoutedEventArgs e) {
           string path =  OpenDialog();
            Button btn = sender as Button;
            StackPanel parent = btn.Parent as StackPanel;            foreach(var child in parent.Children){
                if(child is TextBox){
                    ((TextBox)child).Text = path;
                }
            }
        }
        
    }
}工程编译完事之后，在toolbox能看到自定义控件的图标，但是当在其他的xaml文件中引用FileSelector的时候，不显示这个控件。主窗体的xaml文件如下
<Window x:Class="metadataTool.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        
        xmlns:my="clr-namespace:DevComponents.WpfEditors;assembly=DevComponents.WpfEditors"  
        
        Background="Chocolate" Title="元数据录入系统" Height="706" Width="1095" xmlns:my1="clr-namespace:FileSelectorControl;assembly=FileSelectorControl" xmlns:my2="clr-namespace:FileSelectorControl.Themes;assembly=FileSelectorControl">    <Grid Width="1009" Height="675">        
        <Menu Height="25" HorizontalAlignment="Left" Name="menu" VerticalAlignment="Top" Width="881" Margin="4,4,0,0">
            <MenuItem Header="文件" Name="file" Margin="20,0,20,0">
                <MenuItem Header="退出" Name="exit"></MenuItem>
            </MenuItem>            
            
            <MenuItem Header="操作" Name="view" Margin="0,0,20,0"></MenuItem>            
            <MenuItem Header="帮助" Name="help" Margin="0,0,20,0"></MenuItem>
        </Menu>        <my1:FileSelector Name="fileSelector1" Width="200" Height="300"/>        <StackPanel Name="inputArea" Margin="0,30,2,12" Background="Green">
            
        </StackPanel>
    </Grid>
    
</Window>系统运行加载这个窗体，自定义控件FileSeletor不显示。这是问什么呢？

Answer 1

调试了下 布局问题
把主窗体最外面的grid改成stackpanel就可以显示了

Answer 2

谢谢，可是我把主窗体代码修改为如下  <Window x:Class="metadataTool.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        
        xmlns:my="clr-namespace:DevComponents.WpfEditors;assembly=DevComponents.WpfEditors"  
        
        Background="Chocolate" Title="元数据录入系统" Height="706" Width="1095" xmlns:my1="clr-namespace:FileSelectorControl;assembly=FileSelectorControl" xmlns:my2="clr-namespace:FileSelectorControl.Themes;assembly=FileSelectorControl">    <StackPanel Width="1009" Height="675">        
        <Menu Height="25" HorizontalAlignment="Left" Name="menu" VerticalAlignment="Top" Width="881" Margin="4,4,0,0">
            <MenuItem Header="文件" Name="file" Margin="20,0,20,0">
                <MenuItem Header="退出" Name="exit"></MenuItem>
            </MenuItem>            
            
            <MenuItem Header="操作" Name="view" Margin="0,0,20,0"></MenuItem>            
            <MenuItem Header="帮助" Name="help" Margin="0,0,20,0"></MenuItem>
        </Menu>                <StackPanel Name="inputArea" Margin="0,10,2,12" Background="Green">
            
        </StackPanel>
        <my1:FileSelector Name="fileSelector1" Height="177" />
    </StackPanel>
    
</Window>还是出不来，是什么原因呢？

Answer 3

我调试通过了啊 不过运行的时候点击添加的按钮会报错而已
代码就不贴了 改了几个地方 
app.xaml里面添加了资源字典
<Application.Resources>
        <ResourceDictionary Source="./Themes/Generic.xaml"/>
    </Application.Resources>给资源添加了key
 <Style TargetType="{x:Type local:FileSelector}" x:Key="sssss">调用的时候加了key
<local:FileSelector Style="{StaticResource sssss}" x:Name="fileSelector1" Width="200" Height="300"/>你试试看看

Answer 4

很感谢您的及时和热心的回复。您说在app.xaml增加一个资源字典，但是我创建的这个工程自定义控件工程没有app.xmal这个文件。
工程的目录FileSelectorControl(工程名)
FileSelectorControl
     Properties
     References
     Themes
       Generic.xaml
     FileSelector.cs

Answer 5

实际上 就是需要给你的
<local:FileSelector Style="{StaticResource sssss}" x:Name="fileSelector1" Width="200" Height="300"/>
给个style 这个style在哪里定义 随便你 只要能取到 不报错应该就ok了吧