如何清除富文本框中的某些内容 [英] how to clear a certain content in a rich text box

问题描述

我有一个显示项目的富文本框。这些项目具有列名称。列表名称在表单加载时加载。它们将值保存为行。单击一个按钮即可添加这些行（当添加按钮时点击）。



在底部，让我说我在rtb中有另一个字段（总金额），显示金额列的总值。这也显示当点击计算按钮时。



如果有人想要添加另一行进行计算，它将创建显示的格式。所以我想在另一行时清除总金额字段项目得到了补充。有没有办法做到这一点。

i have a rich text box that displays items.These items have column names.The column names are loaded when the form loads.They hold values as rows.These rows are appended at a click of a button (when add button is clicked).

At the bottom,let me say i have another field(total amount) in the rtb which displays total value of a Amount column.This is also displayed when calculate button is clicked.

If someone wants to add another row to be calculated it would create the format displayed.so i wanted to clear the total amount field when another item gets added.Is there a way to do that.

推荐答案

每次将新记录添加到rtb时重新计算总和。

这样你就拥有了最新的总数而且你不必删除总数。

Recalculate the sum total every time a new record is added to the rtb.
This way you have the latest total and you don't have to remove the total.

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