C# 添加右键菜单

用户9127601

发布于 2022-03-23 08:55:38

1.6K0

发布于 2022-03-23 08:55:38

文章被收录于专栏：dotNET编程大全dotNET编程大全

这节内容很简单，本来不打算写的，有群友技术群问了，所以就整理了下写出来了。这节实例是给datagrid添加右键操作菜单，接下来开始正文讲解。

01—数据模型

这里模型比较简单，就定义一个学生类，定义三个属性，分别是id、姓名、性别，如下：这里重写了tostring方法，方便打印

    [AddINotifyPropertyChangedInterface]
    public class Students : PropertyChangedBase
    {
        private int id;
        public int Id
        {
            get { return id; }
            set
            {
                id = value;
            }
        }
        public string Name { get; set; }

        private int age;
        public int Age 
        {
            get { return age; }
            set
            {
                age = value;
                if(age < 16 || age > 21 )
                {
                    AgeValidate = true;
                }
                else
                {
                    AgeValidate = false;
                }
            }
        }

        public bool AgeValidate { get; set; }
        public override string ToString()
        {
            StringBuilder report = new StringBuilder();
            report.AppendLine($"[Id]  = [{Id}]");
            report.AppendLine($"[Name]  = [{Name}]");
            report.AppendLine($"[Age]  = [{Age}]");
            report.AppendLine($"[AgeValidate]  = [{AgeValidate}]");
            return report.ToString();
        }
    }

02—前台绑定

这里写了一个datagrid控件，然后菜单绑定ContextMenu="{Binding menu1}"

采用行选择的模式，如果要单元格选择模式这样操作：

 SelectionMode="Single" SelectionUnit="Cell"

右键事件绑定：

 cal:Message.Attach="[Event MouseRightButtonDown]=[datagrid_MouseRightButtonDown($source,$eventArgs)];"

  <DataGrid Name="dgSourceData" AutoGenerateColumns="False" ItemsSource="{Binding StudentList}" 
                  ContextMenu="{Binding menu1}" RowHeaderWidth="30"  SelectedItem ="{Binding SelectedItems}" 
                                cal:Message.Attach="[Event MouseRightButtonDown]=[datagrid_MouseRightButtonDown($source,$eventArgs)];" 
                               CellEditEnding="dgSourceData_BeginningEdit" SelectionChanged="dgSourceData_SelectionChanged" >
            <DataGrid.Columns>
                <DataGridTextColumn Header="Name"  Binding="{ Binding Path=Name}" MinWidth="68"/>
                <DataGridTemplateColumn  Header="Age"  MinWidth="68" >
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <TextBox Text="{Binding Path=Age,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" 
                                     Foreground="{Binding AgeValidate,Converter={StaticResource ShowColorConverter}}" />
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
                <DataGridTextColumn Header="Id"  Binding="{ Binding Path=Id}" MinWidth="48"/>
            </DataGrid.Columns>
        </DataGrid>

03—后台处理

   public System.Windows.Controls.DataGrid dGrid { get; set; }
        public System.Windows.Controls.ContextMenu menu1 { get; set; }
        public string BrowseDataSavePath { get; set; } = @"D:\Temporary";

后台逻辑很简单，感觉也没啥好讲的，详看代码，不懂得加我微信zls20210502咨询，或者来我技术群讨论

 /// <summary>
        /// 右键删除数据
        /// </summary>
        /// <param name="sender">对象</param>
        /// <param name="e">事件</param>
        public void datagrid_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
        {
            dGrid = (System.Windows.Controls.DataGrid)sender;
            menu1 = new System.Windows.Controls.ContextMenu();
            System.Windows.Controls.MenuItem menuitemFunc1 = new System.Windows.Controls.MenuItem();
            System.Windows.Controls.MenuItem menuitemFunc2 = new System.Windows.Controls.MenuItem();
            System.Windows.Controls.MenuItem menuitemFunc3 = new System.Windows.Controls.MenuItem();
            menuitemFunc1.Header = "移动到此位置";
            menuitemFunc2.Header = "删除此行信息";
            menuitemFunc3.Header = "导出数据";
            menuitemFunc1.Click += MoveToPostion_Click;
            menuitemFunc2.Click += DeleteRow_Click;
            menuitemFunc3.Click += ExportData_Click;
            menu1.Items.Add(menuitemFunc1);
            menu1.Items.Add(menuitemFunc2);
            menu1.Items.Add(menuitemFunc3);
            menu1.StaysOpen = true;
        }
        /// <summary>
        /// 点击删除后的事件
        /// </summary>
        /// <param name="sender">对象</param>
        /// <param name="e">事件</param>
        public void DeleteRow_Click(object sender, RoutedEventArgs e)
        {
            StudentList.RemoveAt(dGrid.SelectedIndex);
        }
        /// <summary>
        /// 移动到当前选定的位置
        /// </summary>
        /// <param name="sender">对象</param>
        /// <param name="e">事件</param>
        public void MoveToPostion_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                //此方法省略；
                System.Windows.MessageBox.Show("机台已成功移动到当前坐标");
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }
        }
        /// <summary>
        /// 导出datagrid表格中的数据
        /// </summary>
        /// <param name="sender">对象</param>
        /// <param name="e">事件</param>
        public void ExportData_Click(object sender, RoutedEventArgs e)
        {
            BrowseSavePath();
        }
        /// <summary>
        /// 导出地址浏览
        /// </summary>
        public void BrowseSavePath()
        {
            FolderBrowserDialog browserDialog = new FolderBrowserDialog();
            browserDialog.Description = "请选择路径";
            try
            {
                if (browserDialog.ShowDialog() == DialogResult.OK)
                {
                    if (string.IsNullOrEmpty(browserDialog.SelectedPath))
                    {
                        System.Windows.MessageBox.Show("文件夹路径不能为空");
                        return;
                    }
                    BrowseDataSavePath = browserDialog.SelectedPath;
                    DataExport(BrowseDataSavePath);
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }
        }
        public void DataExport(string path)
        {
            //此方法省略；
            System.Windows.MessageBox.Show("数据已成功导出");
        }