Question

我是mvvm的新手，并尝试学习。所以我创建了新的项目和学习，但是：我遇到了带有复选框的Silverlight问题（花了两天时间）我不知道，如何在silverlight mvvm中绑定checbox。

在我的xaml文件中，我有

        <sdk:DataGrid x:Name="List_ServicessProcess" AutoGenerateColumns="False">
        <sdk:DataGrid.Columns>
            <sdk:DataGridTemplateColumn>
                <sdk:DataGridTemplateColumn.CellTemplate>
                    <DataTemplate>
                        <TextBlock Text="{Binding Summary[0].Total}" />
                    </DataTemplate>
                </sdk:DataGridTemplateColumn.CellTemplate>
            </sdk:DataGridTemplateColumn>
            <sdk:DataGridTemplateColumn>
                <sdk:DataGridTemplateColumn.CellTemplate>
                    <DataTemplate>
                        <TextBlock Text="{Binding Summary[0].Total}" />
                    </DataTemplate>
                </sdk:DataGridTemplateColumn.CellTemplate>
            </sdk:DataGridTemplateColumn>
        </sdk:DataGrid.Columns>
    </sdk:DataGrid>

在我的C＃代码中：

public class SaleData
{
    public int Categoryid { get; set; }
    public string Category { get; set; }
    public List<YearSummary> Summary { get; set; }
}

public class YearSummary
{
    public int Year { get; set; }
    public double Total { get; set; }
    public List<OnWarehouse> Warehouse { get; set; }
}

public class OnWarehouse
{
    public bool yes { get; set; }
}

public partial class MainPage : UserControl
{
    public MainPage()
    {
        InitializeComponent();

        var data = GetData();
        List_ServicessProcess.ItemsSource = data;
        var firstRow = data.First();

        for (int i = 0; i < firstRow.Summary.Count; i++)
        {
            var monthlySummary = firstRow.Summary[i];
            List_ServicessProcess.Columns.Add(CreateColumn(i, monthlySummary.Year.ToString()));
        }
    }

    public static List<SaleData> GetData()
    {
        List<SaleData> data = new List<SaleData>();
        data.Add(new SaleData() { Category = "Laptop Toshiba xyz", Summary = GetSummaryData() });
        data.Add(new SaleData() { Category = "Laptop Toshiba xyz", Summary = GetSummaryData() });
        data.Add(new SaleData() { Category = "Laptop Toshiba yzx", Summary = GetSummaryData() });
        data.Add(new SaleData() { Category = "Laptop Toshiba yzx", Summary = GetSummaryData() });
        data.Add(new SaleData() { Category = "Laptop Toshiba yzx", Summary = GetSummaryData() });
        return data;
    }

    private static List<YearSummary> GetSummaryData()
    {
        List<YearSummary> data = new List<YearSummary>();
        Random rnd = new Random();

        for (int i = 0; i < 5; i++)
        {
            var summary = new YearSummary() { Total = rnd.Next(-5000, 10000), Year = 2008 + i, Warehouse = GetWarehouse() };
            data.Add(summary);
        }

        return data;
    }

    private static List<OnWarehouse> GetWarehouse()
    {
        List<OnWarehouse> data = new List<OnWarehouse>();

        Random rnd = new Random();

        for (int i = 0; i < 4; i++)
        {
            var summary = new OnWarehouse() { yes = (i % 2 == 0)};

            data.Add(summary);
        }
        return data;
    }

    private DataGridTemplateColumn CreateColumn(int index, string header)
    {
        string cellTemp = string.Format(@"<DataTemplate xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation"" 
            xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml"">
             <CheckBox IsChecked=""{{Binding Path=Warehouse[{0}].yes,Mode=TwoWay}}""/>
        </DataTemplate>", index);

        DataGridTemplateColumn column = new DataGridTemplateColumn();
        column.Header = header;
        column.CellTemplate = (DataTemplate)XamlReader.Load(cellTemp);
        return column;
    }
}

当我启动我的简单项目时，不会选中复选框。

最后结果：

finally result

有任何帮助吗？谢谢。雅各布

Answer 1

根据您的要求，如果我正确理解它，您将显示特定年份仓库中是否存在给定的Category。我不知道为什么你在OnWarehouse YearSummary列出DataGrid，但考虑到SaleData中的每一行代表YearSummary而你每年都会添加一列根据{{1}}中SalesData的列表，xaml不应该像

string.Format(@"<DataTemplate xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation"" 
            xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml"">
             <CheckBox IsChecked=""{{Binding Path=Summary[{0}].Warehouse[0].yes,Mode=TwoWay}}""/>
        </DataTemplate>", index);

带复选框的Silverlight动态列

1 个答案: