我正在尝试使用正则表达式反向引用，但遇到了一些非常简单的情况。
正则表达式与整个输入不匹配：
int iCellCount = 3; // In this example, i am defining cell count = 3 as static value. In the real time, cell count is picked from the excel file.
var cellValue = string.Empty;
DataTable dt = new DataTable();
DataRow row; //Create a DataRow
foreach (ExcelReportCell excelCell in excelRow) // Iterating the excel cell row by row in the Excel Sheet
{
cellValue = excelCell.GetText().ToString(); // cellValue is assigned dynamically through excel file cell by cell iteration logic
for (int i = 1; i <= iCellCount; i++)
{
row = dt.NewRow();
row["Your_Column_Name_Here"] = cellValue;
dt.Rows.Add(row);
}
}
输入：
([\D\s]+)(\d+)\1
链接：https://regex101.com/r/yfFLmc/1/
另一方面，不带反向引用（但重复第一个捕获组）的同一个正则表达式正确匹配整个输入：Foo 12 bar
为什么带有反向引用的正则表达式与整个输入不匹配？