使用ClosedXML设置单元格的文本长度

为了验证,您可以如下设置文本长度:

worksheet.Cell(1,1).SetDataValidation().TextLength.EqualOrLessThan(10);

对于完整的列,请使用以下内容:

worksheet.Column(1).AsRange().SetDataValidation().TextLength.EqualOrLessThan(10);

检查此解决方案

请注意,ErrorStyle和ErrorTitle是可选的

worksheet.Range("A1", "A1").SetDataValidation().TextLength.EqualOrGreaterThan(5);
worksheet.Range("A1", "A1").SetDataValidation().ErrorStyle = ClosedXML.Excel.XLErrorStyle.Stop; 
//XLErrorStyle.Stop will prevent adding data, 
//XLErrorStyle.Information will show hint, 
//XLErrorStyle.Warning will let user choose to continue or not
worksheet.Range("A1", "A1").SetDataValidation().ErrorTitle = "Text Length should be greater than 4 charachters";