colortbl 中的 \doublerulesepcolor 问题

Question

我想要一个表格，其中第一行的背景是灰色，其余部分的背景是白色。问题是表格有双列线。我试过了，\doublerulesepcolor但它允许我在两列线之间为所有表格添加颜色，而不仅仅是第一行。

\documentclass{report}
\usepackage{colortbl}
\begin{document}

\begin{verbatim}
\definecolor{Lightgray}{gray}{.80}
\doublerulesepcolor{Lightgray}
 \begin{tabular}[t]{|c|c||c|}\hline
 \rowcolor[gray]{.8} CityFrom & CityTo & Count\\\hline
 \doublerulesepcolor{white}
 a & c & 2\\
 a & e & 1\\\hline
\end{tabular}
\end{verbatim}

\begin{center}
\definecolor{Lightgray}{gray}{.80}
\doublerulesepcolor{Lightgray}
 \begin{tabular}[t]{|c|c||c|}\hline
 \rowcolor[gray]{.8} CityFrom & CityTo & Count\\\hline
 \doublerulesepcolor{white}
 a & c & 2\\
 a & e & 1\\\hline
 \end{tabular}
\end{center}

While trying to solve the problem I realized that \verb+\arrayrulecolor+ can be changed at each line
but this not the case with \verb+\doublerulesepcolor+

\begin{verbatim}
\definecolor{Lightgray}{gray}{.80}
\setlength\arrayrulewidth{2pt}
\doublerulesepcolor{Lightgray}
 \begin{tabular}[t]{|c|c||c|}\hline
 \rowcolor[gray]{.8} CityFrom & CityTo & Count\\\hline
 \arrayrulecolor{red}\doublerulesepcolor{red}
 a & c & 2\\
 \arrayrulecolor{blue}\doublerulesepcolor{blue} 
 a & e & 1\\\hline
 \end{tabular}
\end{verbatim}

\begin{center}
\definecolor{Lightgray}{gray}{.80}
\setlength\arrayrulewidth{2pt}
\doublerulesepcolor{Lightgray}
 \begin{tabular}[t]{|c|c||c|}\hline
 \rowcolor[gray]{.8} CityFrom & CityTo & Count\\\hline
 \arrayrulecolor{red}\doublerulesepcolor{red}
 a & c & 2\\
 \arrayrulecolor{blue}\doublerulesepcolor{blue} 
 a & e & 1\\\hline
 \end{tabular}
\end{center}

What is needed is that \verb+\doublerulesepcolor+ has a ``local" behavior as \verb+\arrayrulecolor+.

Any hint how to obtain this ?

Regards

Esteban

\end{document}

Answer 1

呃，抱歉，这似乎是未记录的功能。

将此添加到文档序言中

\makeatletter
\let\old@mkpream\@mkpream
\def\@mkpream{%
\ifx\CT@drsc@\relax\else\let\CT@drsc@ @\fi
\let\CT@arc@\relax
\old@mkpream}
\makeatother

Answer 2

使用，您{NiceTabular}可以nicematrix直接获得预期的输出。

\documentclass{report}
\usepackage{nicematrix}
\begin{document}

\begin{center}
 \begin{NiceTabular}{|c|c||c|}[colortbl-like]
 \hline
 \rowcolor[gray]{.8} CityFrom & CityTo & Count\\\hline
 a & c & 2\\
 a & e & 1\\\hline
 \end{NiceTabular}
\end{center}

\end{document}

我已经使用了键，colortbl-like以便能够使用具有与\rowcolor相应命令的语法类似的语法的命令来为行着色colortbl。

但是，也可以将行、列和单元格的颜色指令放在主数组之前的 中\CodeBefore。