zoukankan      html  css  js  c++  java
  • WPF ListBox 图片显示及分页

    界面

        <WindowsFormsHost Grid.Row="1" Grid.RowSpan="2" Opacity="1" FontSize="14">
                <wf:TreeView x:Name="tree" AfterSelect="tree_AfterSelect"></wf:TreeView>
            </WindowsFormsHost>

       <ListBox x:Name="listBox" Grid.Row="1" Grid.Column="1">
                <ListBox.ContextMenu>
                    <ContextMenu>
                        <MenuItem x:Name="upload" Header="下载" Click="upload_Click"></MenuItem>
                    </ContextMenu>
                </ListBox.ContextMenu>
                <ListBox.ItemsPanel>
                    <ItemsPanelTemplate>
                        <UniformGrid x:Name="ufg" Columns="4"/>
                    </ItemsPanelTemplate>
                </ListBox.ItemsPanel>
            </ListBox>

        <StackPanel Grid.Row="2" Grid.Column="1" Style="{StaticResource StackPanelStyle}" HorizontalAlignment="Center">
                <Button Content="First" x:Name="btnFirst" Style="{StaticResource ButtonStyle}" Click="btnFirst_Click"></Button>
                <Button Content="Previous" x:Name="btnPrev" Style="{StaticResource ButtonStyle}" Click="btnPrev_Click"></Button>
                <Button Content="Next" x:Name="btnNext" Style="{StaticResource ButtonStyle}" Click="btnNext_Click"></Button>
                <Button Content="Last" x:Name="btnLast" Style="{StaticResource ButtonStyle}" Click="btnLast_Click"></Button>
                <TextBlock x:Name="tbindex" Style="{StaticResource TextBlockStyle}" Margin="10,5,5,5" FlowDirection="RightToLeft"></TextBlock>
                <TextBlock Text="/" Style="{StaticResource TextBlockStyle}" Width="Auto"></TextBlock>
                <TextBlock x:Name="tbmax" Style="{StaticResource TextBlockStyle}"  HorizontalAlignment="Left"></TextBlock>
            </StackPanel>

    代码

        List<ListBoxItem> ListListBoxItem;
            int index = 0;
            int pagesize = 16;
            int tbindexnum = 1;
            int tbmaxnum;

        //tree点击
            private void tree_AfterSelect(object sender, TreeViewEventArgs e)
            {
                listBox.ItemsSource = ListLbi(pagesize, e.Node.Text);
            }

            //右键下载
            private void upload_Click(object sender, RoutedEventArgs e)
            {
                ListBoxItem lb = listBox.SelectedItem as ListBoxItem;
                StackPanel sp = (StackPanel)lb.Content;
                System.Windows.Controls.Label lable = (System.Windows.Controls.Label)sp.Children[1];
                System.Windows.MessageBox.Show(lable.Content.ToString());
            }

            //首页
            private void btnFirst_Click(object sender, RoutedEventArgs e)
            {
                tbindex.Text = 1.ToString();
                tbindexnum = 1;
                index = 0;
                listBox.ItemsSource = ListListBoxItem.Skip(0).Take(pagesize).ToList();
            }

            //尾页
            private void btnLast_Click(object sender, RoutedEventArgs e)
            {
                tbindex.Text = tbmaxnum.ToString();
                tbindexnum = tbmaxnum;
                index = (tbmaxnum - 1) * pagesize;
                listBox.ItemsSource = ListListBoxItem.Skip(index).Take(pagesize).ToList();
            }

            //上一页
            private void btnPrev_Click(object sender, RoutedEventArgs e)
            {
                if (tbindexnum > 1)
                {
                    tbindex.Text = (--tbindexnum).ToString();
                    index -= 16;
                    listBox.ItemsSource = ListListBoxItem.Skip(index).Take(pagesize).ToList();
                }
                else
                {
                    System.Windows.MessageBox.Show("已经到最前了");
                }
            }

            //下一页
            private void btnNext_Click(object sender, RoutedEventArgs e)
            {
                if (tbindexnum < tbmaxnum)
                {
                    tbindex.Text = (++tbindexnum).ToString();
                    index += 16;
                    listBox.ItemsSource = ListListBoxItem.Skip(index).Take(pagesize).ToList();
                }
                else
                {
                    System.Windows.MessageBox.Show("已经到最后了");
                }
            }

            //加载tree
            public void LoadTree()
            {
                TreeNode root = new TreeNode("全部");
                TreeNode child = new TreeNode("分类");
                TreeNode childNode = new TreeNode("子类");
                child.Nodes.Add(childNode);
                root.Nodes.Add(child);
                tree.Nodes.Add(root);
            }

            //ListBox添加item
            public List<ListBoxItem> ListLbi(int pagesize, string str)
            {
                ListListBoxItem = new List<ListBoxItem>();
                Test test = new Test();
                List<Test> list = test.ReturnTest();
                int listLength = list.Count;
                for (int i = 0; i < listLength; i++)
                {
                    ListBoxItem lbi = new ListBoxItem();
                    lbi.HorizontalContentAlignment = System.Windows.HorizontalAlignment.Center;
                    StackPanel sp = new StackPanel();
                    Image image = new Image();
                    image.Source = new BitmapImage(new Uri(list[i].image, UriKind.Relative));
                    System.Windows.Controls.Label lable = new System.Windows.Controls.Label();
                    lable.Content = str + i;
                    sp.Children.Add(image);
                    sp.Children.Add(lable);
                    lbi.Content = sp;
                    ListListBoxItem.Add(lbi);
                }

                if (listLength % pagesize == 0)
                {
                    tbmaxnum = listLength / pagesize;
                }
                else
                {
                    tbmaxnum = listLength / pagesize + 1;
                }
                tbindex.Text = 1.ToString();
                tbmax.Text = tbmaxnum.ToString();
                index = 0;
                tbindexnum = 1;
                return ListListBoxItem.Skip(0).Take(pagesize).ToList();
            }

    如图

  • 相关阅读:
    JVM调优-Java中的对象
    Spring MVC如何接收浏览器传递来的请求参数--request--形参--实体类封装
    Navicat for MySQL 64位破解版
    Idea详细配置
    数据库--悲观锁【收藏,待尝试】
    性能问题分析
    java 反射机制之 getDeclaredMethod()获取方法,然后invoke执行实例对应的方法
    Mysql show indexes 查看索引状态
    基于(Redis | Memcache)实现分布式互斥锁
    彻底解决每次打开visio都提示windows正在配置visio的问题
  • 原文地址:https://www.cnblogs.com/chendongbky/p/6386205.html
Copyright © 2011-2022 走看看