Add Dropdown Validation to an entire Excel Column using OpenXML

Question

在 Excel 中，我能够向一系列单元格添加验证规则，并将接受的输入限制为下拉列表中显示的值列表。这是使用数据验证工具完成的，如下图所示：

我有一些生成 Excel 工作表的 C# 代码，我想将这种相同类型的验证添加到其中一列。

使用Microsoft.Office.Interop.Excel，我可以将这种下拉验证添加到整个列中：

string flatList = "FirstChoice,SecondChoice,ThirdChoice";

//select the entire first row as the range
Microsoft.Office.Interop.Excel.Range range = worksheet.get_Range("A1").EntireColumn;

//remove any previously existing validation           
range.Validation.Delete();               

//add new validation
range.Validation.Add(
    Microsoft.Office.Interop.Excel.XlDVType.xlValidateList,
    Microsoft.Office.Interop.Excel.XlDVAlertStyle.xlValidAlertInformation,
    Microsoft.Office.Interop.Excel.XlFormatConditionOperator.xlBetween,
    flatList,
    Type.Missing);

range.Validation.IgnoreBlank = true;
range.Validation.InCellDropdown = true;

问题是，我不能保证我的用户安装了 Microsoft Office。因此，我想改为使用DocumentFormat.OpenXML.

是否可以使用 OpenXML 添加这种相同类型的下拉验证？

我已经看到一些帖子使用DataValidation，但一直无法弄清楚如何让它工作，以及如果这能解决我的问题。

Answer 1

您需要使用该类，DataValidation但您也需要该类，这是完全正确的DataValidations。

AWorkSheet可以有零个或一个，DataValidations而 A 又可以包含一个或多个DataValidation'。

以下代码将创建您正在寻找的数据验证：

using (SpreadsheetDocument myDoc = SpreadsheetDocument.Create(filename, SpreadsheetDocumentType.Workbook))
{
    /*** GENERAL SETUP ***/
    WorkbookPart workbookpart = myDoc.AddWorkbookPart();
    workbookpart.Workbook = new Workbook();
    // Add a WorksheetPart to the WorkbookPart.
    WorksheetPart worksheetPart = workbookpart.AddNewPart<WorksheetPart>();
    SheetData sheetData = new SheetData();
    // Add a WorkbookPart to the document.
    worksheetPart.Worksheet = new Worksheet(sheetData);
    Sheets sheets = myDoc.WorkbookPart.Workbook.AppendChild(new Sheets());
    sheets.AppendChild(new Sheet()
    {
        Id = myDoc.WorkbookPart.GetIdOfPart(myDoc.WorkbookPart.WorksheetParts.First()),
        SheetId = 1,
        Name = "Sheet1"
    });

    /***  DATA VALIDATION CODE ***/
    DataValidations dataValidations = new DataValidations();
    DataValidation dataValidation = new DataValidation() 
    { 
        Type = DataValidationValues.List, 
        AllowBlank = true,
        SequenceOfReferences = new ListValue<StringValue>() { InnerText = "A1:A1048576" }
    };
    Formula1 formula = new Formula1();
    formula.Text = "\"FirstChoice,SecondChoice,ThirdChoice\"";

    dataValidation.Append(formula);
    dataValidations.Append(dataValidation);

    worksheetPart.Worksheet.AppendChild(dataValidations);
}

Answer 2

通过更多的挖掘，我能够弄清楚如何使用以下方法DataValidation向我的 Excel 工作表中的整个列添加下拉验证DocumentFormat.OpenXml：

string flatList = "FirstChoice,SecondChoice,ThirdChoice";

DataValidation dataValidation = new DataValidation
{
    Type = DataValidationValues.List,
    AllowBlank = true,

    //Use A:A or A1:A1048576 to select the entire column A
    //1048576 (2^20) is the max row number since Excel 2007.
    SequenceOfReferences = new ListValue<StringValue>() { InnerText = "A:A" },

    //Set the formula to the list of dropdown values. Escape the double quotes.
    Formula1 = new Formula1("\"" + flatList + "\"")
};

//Check if there are any other DataValidations already in the worksheet
DataValidations dvs = worksheet.GetFirstChild<DataValidations>();
if (dvs != null)
{
    //If you already have existing validation for column A, you may need to Remove()
    //or Replace() the current validation to get the new validation to show.          

    //Add the new DataValidation to the list of DataValidations
    dvs.Count = dvs.Count + 1;
    dvs.Append(dataValidation);
}
else
{
    DataValidations newDVs = new DataValidations();
    newDVs.Append(dataValidation);
    newDVs.Count = 1;

    //Append the validation to the DocumentFormat.OpenXml.SpreadSheet.Worksheet variable
    worksheet.Append(newDVs);
}