如何在更改数量时计算文本框中产品的总价值

问题描述

嗨我有一个wpf数据网格视图，其中有列数量的价格和总数，当我添加一个产品总数将按qty *价格计算我有一个文本框，它将存储总和的总和但当我更改数值时文本框不会更改，除非它从数量上失去焦点帮助



我尝试过：



十进制总数= 0;



for（int i = 0; i< dgvProducts.Items.Count; i ++）

{

BLProducts blpro = dgvProducts.Items [i] as BLProducts;

total + = blpro.qty * blpro.price;

}





txtproductTotal.Text = Parsing.ParsetoRound（total，CommonVariables.DecimalPlaces）;



我在celleditending中使用过这种方法

hi I had a wpf datagrid view for products which have columns qty price and total when I add one product total will be calculated by qty * price I had a text box which will store sum of total but when I change qty value in textbox is not changed until and unless it loses its focus from qty kindly help

What I have tried:

decimal total= 0;

for (int i = 0; i < dgvProducts.Items.Count; i++)
{
BLProducts blpro = dgvProducts.Items[i] as BLProducts;
total+= blpro.qty * blpro.price;
}


txtproductTotal.Text = Parsing.ParsetoRound(total, CommonVariables.DecimalPlaces);

I had used this method in celleditending

推荐答案

[]写道：

（ ...）当我更改文本框中的数值时，除非它从qty失去焦点，否则不会更改

(...) when I change qty value in textbox is not changed until and unless it loses its focus from qty

这是WPF控件的正常行为。请阅读： [] - WPF输入事件部分以找出原因。

This is normal behviour of WPF controls. Please read this: Routed Events Overview[^] - WPF Input Events part to find out why.

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