在Excel中从范围中删除单元格

Question

我创建了一个包含两个按钮的自定义Excel功能区。 btnFillColor和btnUndo。

当用户单击btnFillColor按钮时，所选单元格将填充某种颜色。 同时，将显示一个输入框，要求用户为选定的单元格区域命名。

当用户单击btnUndo时，将清除单元格，并以完全相反的顺序删除相应范围的名称。

当用户单击btnFillColor并为选定的单元格命名时，如果已经存在相同的名称，则该范围将以相同的名称附加到现有范围。

现在我的问题是：当用户以相同的名称添加了两个不同的范围后，单击“撤消”按钮时，只有那些单元格应该被清除并移出最后添加到该范围的范围。 另一个应与先前给出的名称保持不变。 如何实现呢？

这是代码。

    private void btnFillColor_Click(object sender, RibbonControlEventArgs e)
    {
        Excel.Worksheet ws = Globals.ThisAddIn.Application.ActiveWorkbook.ActiveSheet;
        string strFilledRangeAddress = Globals.ThisAddIn.Application.Selection.Address.ToString();
        Excel.Range FilledRange = ws.get_Range(strFilledRangeAddress);
        FilledRange.Interior.Color = Color.YellowGreen;
        string tagName = Microsoft.VisualBasic.Interaction.InputBox("Enter tag name:");
        if (lstFilledRangeName.Contains(tagName))
        {
            Excel.Range ExistingRange = ws.get_Range(tagName);
            FilledRange = Globals.ThisAddIn.Application.Union(ExistingRange, FilledRange);
        }
        else
        {
            lstFilledRangeName.Add(tagName);
        }
        FilledRange.Name = tagName;
        lstFilledRangeAddresses.Add(strFilledRangeAddress);
        if (btnUndo.Enabled == false)
            btnUndo.Enabled = true;
    }

    private void btnUndo_Click(object sender, RibbonControlEventArgs e)
    {
        Excel.Worksheet ws = Globals.ThisAddIn.Application.ActiveWorkbook.ActiveSheet;
        Excel.Range FilledRange = ws.get_Range(lstFilledRangeAddresses[lstFilledRangeAddresses.Count - 1]);
        FilledRange.Interior.ColorIndex = 0;
        lstFilledRangeAddresses.RemoveAt(lstFilledRangeAddresses.Count - 1);
        if (lstFilledRangeAddresses.Count == 0)
            btnUndo.Enabled = false;
    }

Answer 1

为了仅清除最后填充的单元格并将其从现有范围中删除，我一直在跟踪用户在数据表中所做的选择。 当用户单击撤消按钮时，在清除单元格和名称之前，我正在检查用户以前是否使用相同名称进行选择。 如果是，则首先清除该名称下的所有单元格，然后也删除该名称。 之后，我再次用颜色填充先前的选择，并为其赋予相同的名称。

这是修改后的代码：

    DataTable dtRangeName_Address = new DataTable();
    private void RnD_Ribbon_Load(object sender, RibbonUIEventArgs e)
    {
        btnUndo.Enabled = false;
        dtRangeName_Address.Columns.Add("Name");
        dtRangeName_Address.Columns.Add("Address");
    }

    private void btnFillColor_Click(object sender, RibbonControlEventArgs e)
    {
        Excel.Worksheet ws = Globals.ThisAddIn.Application.ActiveWorkbook.ActiveSheet;
        string strFilledRangeAddress = Globals.ThisAddIn.Application.Selection.Address.ToString();
        Excel.Range FilledRange = ws.get_Range(strFilledRangeAddress);
        FilledRange.Interior.Color = Color.YellowGreen;
        DataRow drRangeName_Address = dtRangeName_Address.NewRow();
        bool TagAlreadyExists = false;
        string tagName = Microsoft.VisualBasic.Interaction.InputBox("Enter tag name:");
        for (int i = dtRangeName_Address.Rows.Count - 1; i >= 0; i--)
        {
            if (dtRangeName_Address.Rows[i][0].ToString() == tagName)
            {
                Excel.Range ExistingRange = ws.get_Range(dtRangeName_Address.Rows[i][1].ToString());
                FilledRange = Globals.ThisAddIn.Application.Union(ExistingRange, FilledRange);
                drRangeName_Address[1] = FilledRange.Address.ToString();
                drRangeName_Address[0] = tagName;
                TagAlreadyExists = true;
                break;
            }
        }
        if (TagAlreadyExists == false)
        {
            drRangeName_Address[1] = strFilledRangeAddress;
            drRangeName_Address[0] = tagName;
        }
        FilledRange.Name = tagName;
        dtRangeName_Address.Rows.Add(drRangeName_Address);
        if (btnUndo.Enabled == false)
            btnUndo.Enabled = true;
    }

    private void btnUndo_Click(object sender, RibbonControlEventArgs e)
    {
        Excel.Worksheet ws = Globals.ThisAddIn.Application.ActiveWorkbook.ActiveSheet;
        Excel.Range FilledRange = ws.get_Range(dtRangeName_Address.Rows[dtRangeName_Address.Rows.Count - 1][1].ToString());
        string tagName = dtRangeName_Address.Rows[dtRangeName_Address.Rows.Count - 1][0].ToString();
        Excel.Range ExistingRange = null;
        bool TagAlreadyExists = false;
        for (int i = dtRangeName_Address.Rows.Count - 2; i >= 0; i--)
        {
            if (dtRangeName_Address.Rows[i][0].ToString() == tagName)
            {
                ExistingRange = ws.get_Range(dtRangeName_Address.Rows[i][1].ToString());
                TagAlreadyExists = true;
                break;
            }
        }
        FilledRange.Interior.ColorIndex = 0;
        FilledRange.Name.Delete();
        if (TagAlreadyExists == true && ExistingRange != null)
        {
            ExistingRange.Interior.Color = Color.YellowGreen;
            ExistingRange.Name = tagName;
        }
        dtRangeName_Address.Rows.RemoveAt(dtRangeName_Address.Rows.Count - 1);
        if (dtRangeName_Address.Rows.Count == 0)
            btnUndo.Enabled = false;
    }