• wpf DataGrid CheckBox列全选


    最近在wpf项目中遇到当DataGrid的header中的checkbox选中,让该列的checkbox全选问题,为了不让程序员写自己的一堆事件,现写了一个自己的自定义控件

    在DataGrid的 <DataGridTemplateColumn.HeaderTemplate> 中使用此控件即可

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    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 _UserControls
    {
        public class DataGridHeaderCheckBox : CheckBox
        {
            public DataGridHeaderCheckBox()
            {
                this.Click += new System.Windows.RoutedEventHandler(DataGridHeaderCheckBox_Click);
            }

            private int thisColumnIndex = 0;

            /// <summary>
            /// 当前 CheckBox 列的索引,默认是 0
            /// </summary>
            public int ThisColumnIndex
            {
                get { return thisColumnIndex; }
                set { thisColumnIndex = value; }
            }

            /// <summary>
            /// 当header列的checkbox选中时设置本列的checkbox全选或全不选
            /// </summary>
            /// <param name="sender"></param>
            /// <param name="e"></param>
            protected void DataGridHeaderCheckBox_Click(object sender, System.Windows.RoutedEventArgs e)
            {
                DependencyObject parent = this;
                while ((parent = VisualTreeHelper.GetParent(parent)) != null)
                {
                    if (parent is DataGrid)
                    {
                        List<CheckBox> checkList = null;
                        DataGrid currentDataGrid = ((DataGrid)parent);
                        foreach (var item in currentDataGrid.Items)
                        {
                            DataGridTemplateColumn templeColumn = currentDataGrid.Columns[this.thisColumnIndex] as DataGridTemplateColumn;

                            FrameworkElement fwElement = currentDataGrid.Columns[this.thisColumnIndex].GetCellContent(item);

            ////有时  fwElement 会为 NULL 原因是datagrid是默认开启了ui virtualization ,VisualTree并不是所有的控件,为了显示加速,virtualization        ////默认的只会加载一定范围的控件,不显示的控件并不加载

            ////需要修改 DataGrid 的属性  EnableColumnVirtualization="False"     EnableRowVirtualization="False" 就可以了
                            if (fwElement != null)
                            {
                                checkList = ControlManager.GetChildObjects<CheckBox>(fwElement, typeof(CheckBox));
                                foreach (CheckBox ch in checkList)
                                {
                                    ch.IsChecked = this.IsChecked;
                                }
                            }
                        }
                        break;
                    }
                }
            }


        }
    }

    xaml中的代码

    <DataGridTemplateColumn Header="操作" Width="60">
                                <DataGridTemplateColumn.HeaderTemplate>
                                    <DataTemplate>                                   
                                        <ctrls:DataGridHeaderCheckBox ThisColumnIndex="1" Content="操作" />
                                    </DataTemplate>
                                </DataGridTemplateColumn.HeaderTemplate>
                                <DataGridTemplateColumn.CellTemplate>
                                    <DataTemplate>
                                        <CheckBox Name="cb"></CheckBox>
                                    </DataTemplate>
                                </DataGridTemplateColumn.CellTemplate>
                            </DataGridTemplateColumn>

  • 相关阅读:
    误区30日谈25-30
    误区30日谈21-24
    误区30日谈16-20
    误区30日谈11-15
    误区30日谈6-10
    eclipse如何导入java项目文件
    Spring配置bean文件的底层实现方式
    hibernate中get,load,list,iterate的用法及比较
    MySQL数据库的事务管理
    单元格样式
  • 原文地址:https://www.cnblogs.com/renzhendewo/p/3161312.html
Copyright © 2020-2023  润新知