DataGrid数据绑定

后台数据绑定

用户场景是生成报表，展示公司各员工每个月的绩效

数据结构

包括报表和单个员工绩效两个实体

public class Report
{
    /// <summary>
    /// 统计时间
    /// </summary>
    public string StatisticalDate { get; set; }
    public List<ReportDetail> ReportDetails { get; set; }
}

public class ReportDetail
{
    /// <summary>
    /// 职员姓名
    /// </summary>
    public string EmployeeName { get; set; }
    /// <summary>
    /// 统计数据
    /// </summary>
    public decimal Data { get; set; }
}

关键代码

DataGrid dataGrid = new DataGrid();
var _ds = new DataSet("Test");
Dt = _ds.Tables.Add("月度绩效表");
//create columns
//创建列
Dt.Columns.Add("月份");
foreach (var item in reports[0].ReportDetails)
{
    Dt.Columns.Add(item.EmployeeName);
}
//fill data to rows
//赋值数据
for(int i=0;i< reports.Count;i++)
{
    var theRow = Dt.NewRow();
    theRow[0] = reports[i].StatisticalDate;
    for (int j = 0; j < reports[i].ReportDetails.Count; j++)
    {
        theRow[j+1] = reports[i].ReportDetails[j].Data;
    }
    Dt.Rows.Add(theRow);
}
//数据绑定
dataGrid.ItemsSource = Dt.AsDataView();
//将控件添加到Grid
MyGrid.Children.Add(dataGrid);

示例代码

https://github.com/zLulus/NotePractice/blob/dev3/WPF/WpfDemo/Bind/DataGridBackgroundBind.xaml
https://github.com/zLulus/NotePractice/blob/dev3/WPF/WpfDemo/Bind/DataGridBackgroundBind.xaml.cs

其他：列头重复解决方案

当前用户场景，如果遇到行列互换，即将员工姓名和月份互换，可能出现列名相同的问题（员工同名），则最好将列头绑定改为员工姓名+员工编号，保证唯一性，前端只显示名称，绑定"名称+ID"

前端数据绑定

数据结构

包括教师和教师信息扩展两个实体

public class Teacher
{
    public string SchoolNumber { get; set; }
    public string Name { get; set; }
    public string Sex { get; set; }
    public TeacherDetailInfo TeacherDetailInfo { get; set; }
}

public class TeacherDetailInfo
{
    public DateTime EntryTime { get; set; }
    public string Address { get; set; }
}

关键代码

<DataGrid ItemsSource="{Binding }" AutoGenerateColumns="False" CanUserAddRows="False">
    <DataGrid.Columns>
        <DataGridTextColumn Header="编号" Binding="{Binding SchoolNumber}"/>
        <DataGridTextColumn Header="姓名" Binding="{Binding Name}"/>
        <DataGridTextColumn Header="性别" Binding="{Binding Sex}"/>
        <!--格式化日期-->
        <DataGridTextColumn Header="入职时间" Binding="{Binding Path=TeacherDetailInfo.EntryTime, StringFormat={0:yyyy年MM月dd日}}"/>
        <!--如果这里是双向绑定，则是下面的写法，Mode是双向(TwoWay)，触发器是变化即触发-->
        <!--<DataGridTextColumn Header="入职时间" Binding="{Binding Path=TeacherDetailInfo.EntryTime,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>-->
        <DataGridTextColumn Header="住址" Binding="{Binding Path=TeacherDetailInfo.Address}"/>
    </DataGrid.Columns>
</DataGrid>

示例代码

https://github.com/zLulus/NotePractice/blob/dev3/WPF/WpfDemo/Bind/DataGridBindMultiData.xaml
https://github.com/zLulus/NotePractice/blob/dev3/WPF/WpfDemo/Bind/DataGridBindMultiData.xaml.cs