使用C#使用Excel进行范围验证

Question

我一直在网上看了4个小时,我就是做不到.

我的目标:创建一个组合,我可以对我的项目进行排序,当我点击其中一个时,该项目就会单独出现.

在Excel中,很容易做到,但我不能用C#来做.

我找到了这个答案:其他话题,但我无法理解"this.Controls"的来源.

谢谢你的帮助

Answer 1

如果你想为此目的使用验证,我会编写以下方法来添加验证和用户点击单元格时出现的小型信息框:

/// <summary>
/// Adds a small Infobox and a Validation with restriction (only these values will be selectable) to the specified cell.
/// </summary>
/// <param name="worksheet">The excel-sheet</param>
/// <param name="rowNr">1-based row index of the cell that will contain the validation</param>
/// <param name="columnNr">1-based column index of the cell that will contain the validation</param>
/// <param name="title">Title of the Infobox</param>
/// <param name="message">Message in the Infobox</param>
/// <param name="validationValues">List of available values for selection of the cell. No other value, than this list is allowed to be used.</param>
/// <exception cref="Exception">Thrown, if an error occurs, or the worksheet was null.</exception>
public static void AddDataValidation(Worksheet worksheet, int rowNr, int columnNr, string title, string message, List<string> validationValues)
{
    //If the message-string is too long (more than 255 characters, prune it)
    if (message.Length > 255)
        message = message.Substring(0, 254);

    try
    {
        //The validation requires a ';'-separated list of values, that goes as the restrictions-parameter.
        //Fold the list, so you can add it as restriction. (Result is "Value1;Value2;Value3")
        //If you use another separation-character (e.g in US) change the ; appropriately (e.g. to the ,)
        string values = string.Join(";", validationValues);
        //Select the specified cell
        Range cell = worksheet.Cells[rowNr, columnNr];
        //Delete any previous validation
        cell.Validation.Delete();
        //Add the validation, that only allowes selection of provided values.
        cell.Validation.Add(XlDVType.xlValidateList, XlDVAlertStyle.xlValidAlertStop, XlFormatConditionOperator.xlBetween, values, Type.Missing);
        cell.Validation.IgnoreBlank = true;
        //Optional put a message there
        cell.Validation.InputTitle = title;
        cell.Validation.InputMessage = message;

   }
   catch (Exception exception)
    {
         //This part should not be reached, but is used for stability-reasons
         throw new Exception(String.Format("Error when adding a Validation with restriction to the specified cell Row:{0}, Column:{1}, Message: {2}", rowNr, columnNr, message), exception);

    }
}

如果您不需要信息框,只需省略变量标题或消息出现的部分.