有没有办法分组或暂时禁用 RichTextBox 的撤消历史? [英] Is there a way to group or temporarily disable the undo history for a RichTextBox?

问题描述

我目前正在处理 WPF 中 RichTextBox 中的表格.在 WPF 中，表没有行和列，它们只有行，每个行都有一定数量的单元格.当用户按下添加列"按钮时，我的程序会向每一行添加一个新单元格.

I'm currently wrestling with Tables inside RichTextBoxs in WPF. In WPF, tables don't have rows and columns, they just have rows, each having a certain number of cells. When a user presses the "Add Column" button, my program adds a new cell to each row.

使用这种方法的问题是在用户添加一列后，如果他们按下撤消，它会一个一个地删除每个单元格，显然不是用户所期望的.

The problem with using this method is after a user adds a column, if they press undo, it removes each cell one by one, obviously not what the user would expect.

有谁知道暂时禁止向撤消队列添加操作的方法，或将撤消操作分组的方法，或任何其他解决我问题的方法?

Does anyone know a way to temporarily disable the addition of actions to the undo queue, or a way to group undo actions, or any other solution to my problem?

推荐答案

如果您想分组撤消操作(而不是完全禁用撤消)，您可以通过 TextBoxBase.BeginChange() 然后，在进行更改后，TextBoxBase.EndChange()，即:

If you want to group undo actions (rather than disable undo entirely), you can group a set of programmatic changes via TextBoxBase.BeginChange() then, after making the changes, TextBoxBase.EndChange(), i.e.:

        richTextBox.BeginChange();
        try
        {
            // Add column

            // For each row, add a cell to the column.
        }
        finally
        {
            richTextBox.EndChange();
        }

或者，等效地，您可以调用 TextBoxBase.DeclareChangeBlock() 位于 using 语句:

Or, equivalently, you can call TextBoxBase.DeclareChangeBlock() inside a using statement:

        using (richTextBox.DeclareChangeBlock())
        {
            // Add column

            // For each row, add a cell to the column.
        }

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