C#里面做一个ListBox点击Add添加

qq_34656079 2018-09-14 10:37:16

如下图，这个效果怎么做，点击Add，ListBox中会有一行等待添加，填完鼠标离开自动添加完成，这个效果使用C#怎么来做？

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苏克贝塔03 2018-09-17

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不知道winform的flowlayoutpanel行吗？控件都往上添加或移除，好像也能实现你的功能



 public Form2()

        {

            InitializeComponent();

            listTextBoxs = new List<TextBox>();

        }



        List<TextBox> listTextBoxs;

        private void Form2_Load(object sender, EventArgs e)

        {

            this.flowLayoutPanel1.Dock = DockStyle.Fill;

        }

        private void button1_Click(object sender, EventArgs e)

        {

            TextBox t1 = new TextBox();



            listTextBoxs.Add(t1);



            ShowTextBoxs();

        }



        private void button2_Click(object sender, EventArgs e)

        {

            if (listTextBoxs.Count>0)

            {

                listTextBoxs.RemoveAt(listTextBoxs.Count - 1);

                ShowTextBoxs();

            }

        }



        private void ShowTextBoxs()

        {

            this.flowLayoutPanel1.Controls.Clear();

            foreach (TextBox t in listTextBoxs)

            {

                this.flowLayoutPanel1.Controls.Add(t);

            }

        }

yanghao1 2018-09-17

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最后一步是鼠标离开事件，有关内容写在其中。

番茄爱上蛋 2018-09-15

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MainWindow.xaml:

<Window x:Class="ListBoxTest.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

        xmlns:local="clr-namespace:ListBoxTest"

        mc:Ignorable="d"

        Title="MainWindow" Height="350" Width="525" Background="Gray">

    <Window.Resources>

        <DataTemplate x:Key="ListBoxTemplate">

            <TextBox  HorizontalAlignment="Left" VerticalAlignment="Top" Width="97" Margin="0,5,0,5" FontFamily="Arial" Foreground="Black" FontSize="20" Background="White"/>

        </DataTemplate>

        <Style TargetType="ListBoxItem" x:Key="ListBoxBack">

            <Style.Resources>

                <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="#FF38474E"/>

                <SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="#FF38474E"/>

                <SolidColorBrush x:Key="{x:Static SystemColors.InactiveSelectionHighlightBrushKey}" Color="#FF38474E"/>

            </Style.Resources>

        </Style>

    </Window.Resources>

    <Grid>

        <ListBox x:Name="listBox" HorizontalAlignment="Left" Height="100" BorderThickness="0" Margin="125,80,0,0" VerticalAlignment="Top" Width="100"  ItemContainerStyle="{StaticResource  ListBoxBack}" ItemsSource="{Binding TextBoxList}" ItemTemplate="{StaticResource  ListBoxTemplate}" SelectedIndex="{Binding SelectIndex}"/>

        <Button x:Name="AddBtn" Content="Add" HorizontalAlignment="Left" Margin="283,89,0,0" VerticalAlignment="Top" Width="75" Command="{Binding AddCommand}"/>

        <Button x:Name="DeleteBtn" Content="Delete" HorizontalAlignment="Left" Margin="283,149,0,0" VerticalAlignment="Top" Width="75" Command="{Binding DeleteCommand}"/>

    </Grid>

</Window>

MainWindow.xaml.cs:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;



namespace ListBoxTest

{

    /// <summary>

    /// MainWindow.xaml 的交互逻辑

    /// </summary>

    public partial class MainWindow : Window

    {

        public MainWindow()

        {

            InitializeComponent();



            var vm = new MainWindowViewModel();

            this.DataContext = vm;

        }

    }

}

MainWindowViewModel.cs:

using System;

using System.Collections.Generic;

using System.Collections.ObjectModel;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using Microsoft.Practices.Prism.ViewModel;

using Microsoft.Practices.Prism.Commands;

using System.Windows.Controls;



namespace ListBoxTest

{

    public class MainWindowViewModel : NotificationObject

    {

        private ObservableCollection<TextBox> _textBoxList = new ObservableCollection<TextBox>();

        public ObservableCollection<TextBox> TextBoxList

        {

            get

            {

                return _textBoxList;

            }

            set

            {

                if (_textBoxList != value)

                {

                    _textBoxList = value;

                    this.RaisePropertyChanged(() => this.TextBoxList);

                }

            }

        }



        private int _selectIndex = 0;

        public int SelectIndex

        {

            get

            {

                return _selectIndex;

            }

            set

            {

                _selectIndex = value;

                this.RaisePropertyChanged(() => this.SelectIndex);

            }

        }



        protected DelegateCommand<object> _addCommand = null;

        public DelegateCommand<object> AddCommand

        {

            get

            {

                if (_addCommand == null)

                {

                    _addCommand = new DelegateCommand<object>(OnAddCommand, CanAddCommand);

                }

                return _addCommand;

            }

        }



        private bool CanAddCommand(object para)

        {

            return true;

        }



        private void OnAddCommand(object para)

        {

            Add();

        }



        private void Add()

        {

            if (TextBoxList != null)

            {

                TextBoxList.Add(new TextBox { Text = "None"});

            }

        }



        protected DelegateCommand<object> _deleteCommand = null;

        public DelegateCommand<object> DeleteCommand

        {

            get

            {

                if (_deleteCommand == null)

                {

                    _deleteCommand = new DelegateCommand<object>(OnDeleteCommand, CanDeleteCommand);

                }

                return _deleteCommand;

            }

        }



        private bool CanDeleteCommand(object para)

        {

            return true;

        }



        private void OnDeleteCommand(object para)

        {

            Delete();

        }



        private void Delete()

        {

            if (SelectIndex >= 0 && SelectIndex <= TextBoxList.Count)

            {

                TextBoxList.RemoveAt(SelectIndex);

            }

        }

    }