WPF-xaml 计算文本框值的总和 [英] WPF-xaml Calculating Total of text box values
本文介绍了WPF-xaml 计算文本框值的总和的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个 wpf xaml 表单,其中有 5 个文本框显示订单价格.在 5 个文本框下方,我有另一个文本框:[subTotal] 显示订单价格的小计.SubTotal"文本框应自动显示订单价格的小计.
I have a wpf xaml form which has 5 text boxes shows order price. Below the 5 text boxes i have another textbox:[subTotal] which displays the subtotal of order price's."SubTotal" Textbox should display the subtotal of order prices automatically.
当用户在订单价格文本框中输入一个值时,是否有任何 XAMl 编码方式可以让我在SubTotal"文本框中自动计算和显示总计.
Is there any XAMl coding way where i can calculate and dispaly total in the "SubTotal" text box automatically, when user enters a value in the order prices text boxes.
推荐答案
使用这个转换器:
public class SumConverter : IMultiValueConverter
{
public object Convert(object[] values, Type targetType,
object parameter, System.Globalization.CultureInfo culture)
{
double _Sum = 0;
if (values == null)
return _Sum;
foreach (var item in values)
{
double _Value;
if (double.TryParse(item.ToString(), out _Value))
_Sum += _Value;
}
return _Sum;
}
public object[] ConvertBack(object value, Type[] targetTypes,
object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
这样做:
<Window.Resources>
<local:SumConverter x:Key="MySumConverter" />
</Window.Resources>
<StackPanel>
<TextBox Name="TextBox1" Text="1" />
<TextBox Name="TextBox2" Text="2" />
<TextBox Name="TextBox3" Text="3" />
<TextBox Name="TextBox4" Text="4" />
<TextBox Name="TextBox5" Text="5" />
<TextBlock>
<TextBlock.Text>
<MultiBinding Converter="{StaticResource MySumConverter}"
StringFormat="{}{0:C}"
FallbackValue="Error" TargetNullValue="Null">
<Binding Path="Text" ElementName="TextBox1" />
<Binding Path="Text" ElementName="TextBox2" />
<Binding Path="Text" ElementName="TextBox3" />
<Binding Path="Text" ElementName="TextBox4" />
<Binding Path="Text" ElementName="TextBox5" />
</MultiBinding>
</TextBlock.Text>
</TextBlock>
</StackPanel>
看起来像:
这篇关于WPF-xaml 计算文本框值的总和的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文