小编don*_*yte的帖子

我有一张桌子,我跟踪特定项目的费用.这些费用可能会随着时间的推移而变化,所以我有两列(startDate,endDate),当前的费用总是在不久的将来有一个endDate.我已经有一个触发器用于对输入的新行进行一些计算,但我想要发生的是如果我输入一个已经有条目的项目我想将前一个条目的endDate设置为前一天新条目的startDate和新的endDate到预定的远期日期.这是我首先尝试的代码:

CREATE
DEFINER=`root`@`%`
TRIGGER `im`.`splitBeforeIns`
BEFORE INSERT ON `im`.`split`
FOR EACH ROW
BEGIN
    SET NEW.tcPercent = (NEW.tcOfficeFee / NEW.globalFee) * 100 , NEW.proPercent = 100 - NEW.tcPercent, NEW.endDate = 20501231;
    UPDATE im.split set endDate = ADDDATE(NEW.startDate, -1) where procKey = NEW.procKey AND endDate = 20501231;
END$$

我得到的错误是:

ERROR 1442: Can't update table 'split' in stored function/trigger because it is already used by statement which invoked this stored function/trigger.

可能重复：将
WPF属性绑定到变量的数据

如何将我的module1属性绑定到WPF TextBox1？

WPF代码：

<Window x:Class="MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
    <Grid>
        <TextBox Height="23" HorizontalAlignment="Left" Margin="210,146,0,0" Name="TextBox1" VerticalAlignment="Top" Width="120" />
    </Grid>
</Window>

VB.net代码：

Module Module1
    ReadOnly Property tbBinding As String
        Get
            Return "Success!"
        End Get
    End Property
End Module

下面是根据我得到的反馈和我正在做的阅读工作的代码。/ ####### progres中的当前代码（尝试使用类而不是模块）####### /

XAML：

<Window x:Class="MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
    <Grid DataContext="Class1">
        <TextBox Height="23" HorizontalAlignment="Left" Margin="210,146,0,0" Name="TextBox1" VerticalAlignment="Top" Width="120" Text="{Binding Path=tbBinding2}"/>
        <Button Content="Button" Height="23" HorizontalAlignment="Left" Margin="192,74,0,0" Name="Button1" VerticalAlignment="Top" Width="75" />
    </Grid>
</Window>

第1类：

Imports System.ComponentModel

Public Class Class1 …