sas获取文件名及列名

研究了两天SAS，总算能实现 sas获取文件名及列名功能了。
//获取文件列名
libname da "C:\test";
data ex;
set da.qq;
run;
proc transpose data=ex out=ex2;
var _all_;            //没添加前，不能完整进行转置，总会缺少某些列
run;
proc print data=ex2;
run;

//获取某一文件夹中文件名
filename indata pipe 'dir C:\tes /b';
data file_list;
length fname $50.;
infile indata truncover; /* infile statement for file names */
input fname $50.; /* read the file names from the directory */
call symput ('num_files',_n_); /* store the record number in a macro variable */
run;

//vs.net 调用
string[] sasDataText ={
                    "filename indata pipe 'dir C:\\tes /b';data file_list;",
                    " length fname $50.;",
                    " infile indata truncover;",
                    " input fname $50.;",
                    " call symput ('num_files',_n_);",
                    "run;",
                    "proc print;",
                    "run;"
                };
                System.Array sasArray = sasDataText;
                SasWorkSpace.LanguageService.SubmitLines(ref sasDataText);              
                const int len = 100;               
                WSAS.LanguageServiceCarriageControl[] CCs;
                WSAS.LanguageServiceLineType[] lineType;
                string[] logLine;
                SasWorkSpace.LanguageService.FlushListLines(len, out CCs, out lineType, out logLine);  
上面我们调用Language Service来提交SAS DATA步和过程步，并接收LOG和LIST输出；至于如何执行SQL语句，可参考下面链接
Reading SAS Data in .Net Using ADO and ADO.NET
http://support.sas.com/kb/25/276.html