C# 无法将结果加载到data.grid中

我有利息计算器，在计算之后，我想把数据（开始日期、结束日期、原则、日利率、总利率和总额）发送到数据网格

<DataGrid x:Name="table_interestResultsTable" Height="700" HorizontalAlignment="Left" Margin="12,21,0,0" VerticalAlignment="Top" Width="1000" AutoGenerateColumns="False">
            <DataGrid.Columns>
                <DataGridTextColumn Header="Start date" Binding="{Binding interest_SDATE}"/>
                <DataGridTextColumn Header="End date" Binding="{Binding interest_EDATE}"/>
                <DataGridTextColumn Header="Principle" Binding="{Binding interest_PRINCIPLE}"/>
                <DataGridTextColumn Header="ANNUAL RATE" Binding="{Binding interest_ANNUALRATE}"/>
                <DataGridTextColumn Header="Daily interest" Binding="{Binding interest_DAILYINTEREST}"/>
                <DataGridTextColumn Header="Total interest" Binding="{Binding interest_TOTALINTEREST}"/>
                <DataGridTextColumn Header="Total" Binding="{Binding interest_TOTAL}"/>
               
            </DataGrid.Columns>
           
        </DataGrid>

为什么我没有错误

interest_SDATE = start_date.ToShortDateString()

但当我想在下一列中插入第二个日期时出现了错误

interest_EDATE = end_date.ToShortDateString()

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我无法将字符串转换为system.datetime

我发现一个问题，我已将公共类用户更改为：

public class User
    {
        public int Id { get; set; }

        public DateTime interest_SDATE { get; set; }

        public DateTime interest_EDATE { get; set; }

        public decimal interest_PRINCIPLE { get; set; }

        public decimal interest_ANNUALRATE { get; set; }

        public decimal interest_DAILYINTEREST { get; set; }

        public decimal interest_TOTALINTEREST { get; set; }

        public decimal interest_TOTAL { get; set; }

然后：

users.Add(new User() { Id = 4, interest_SDATE = start_date, interest_EDATE = end_date, interest_PRINCIPLE = principle, interest_ANNUALRATE = annualRate_decimal,
            interest_DAILYINTEREST = dailyRate, interest_TOTALINTEREST = totalRate, interest_TOTAL = total});

开始好好工作。

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谢谢大家

但是错误是什么？如果错误是“无法将字符串转换为日期时间”，那么很可能字符串是空的或空的，或者格式不正确！您将开始日期设置为某人的姓名interest\u SDATE=“John Doe”

interest_EDATE = end_date.ToShortDateString()

public class User
    {
        public int Id { get; set; }

        public DateTime interest_SDATE { get; set; }

        public DateTime interest_EDATE { get; set; }

        public decimal interest_PRINCIPLE { get; set; }

        public decimal interest_ANNUALRATE { get; set; }

        public decimal interest_DAILYINTEREST { get; set; }

        public decimal interest_TOTALINTEREST { get; set; }

        public decimal interest_TOTAL { get; set; }

users.Add(new User() { Id = 4, interest_SDATE = start_date, interest_EDATE = end_date, interest_PRINCIPLE = principle, interest_ANNUALRATE = annualRate_decimal,
            interest_DAILYINTEREST = dailyRate, interest_TOTALINTEREST = totalRate, interest_TOTAL = total});