如何按列名通过SqlDataReader.GetValue获取数据

Question

我使用SqlDataReader.GetValue方法从DB读取值:

Log.WriteLine("Value of CompanyName column:" + thisReader.GetValue(1)); 

作为参数GetValue获取列的索引.我怎样才能指定列名而不是索引？

Answer 1

Log.WriteLine("Value of CompanyName column:" + thisReader["CompanyName"]); 

Answer 2

你也可以这样做.

//find the index of the CompanyName column
int columnIndex = thisReader.GetOrdinal("CompanyName"); 
//Get the value of the column. Will throw if the value is null.
string companyName = thisReader.GetString(columnIndex);