Question

我有以下代码用于构建固定长度的文本文件。

                TestFile.WriteLine(string.Format(
                    //Formats with negative numbers are left justified. e.g. {1,-10}
                    "{0,50}" + //SPACER 50
                    "{1,-10}" + //NCSBN ID
                    "{2,10}" + //SPACER 10
                    "{3,-50}" + //LAST NAME
                    "{4,-30}" + //FIRST NAME
                    "{5,-30}" + //MIDDLE NAME
                    "{6,90}" + //SPACER 90
                    "{7,-8}" + //DOB
                    "{8,-1}" + //GENDER
                    "{9,-9}" + //SOCIAL SECURITY NUMBER
                    "{10,41}" + //SPACER 41
                    "{11,-60}" + //ADDRESS 1
                    "{12,-60}", //ADDRESS 2

                    DbReader.GetString(0),DbReader.GetString(1),DbReader.GetString(2),
                    DbReader.GetString(3), DbReader.GetString(4),DbReader.GetString(5),
                    DbReader.GetString(6), DbReader.GetString(7), DbReader.GetString(8),
                    DbReader.GetString(9), DbReader.GetString(10), DbReader.GetString(11),
                    DbReader.GetString(12)));

在我添加第12个索引之前，一切都很好，然后我收到以下错误：

System.IndexOutOfRangeException was unhandled
  Message="Index was outside the bounds of the array."
  Source="System.Data"
  StackTrace:
       at System.Data.Odbc.DbCache.AccessIndex(Int32 i)
       at System.Data.Odbc.OdbcDataReader.internalGetString(Int32 i)
       at System.Data.Odbc.OdbcDataReader.GetString(Int32 i)
       at BuildFile_EXE.Program.Main(String[] args) in G:\IT Development\SSIS\Reports\NursysAPRN_ToNatCouncil\BuildFile_EXE\BuildFile_EXE\Program.cs:line 69
       at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()

string.format是否有11个索引限制，或者我错过了一些明显的东西？

感谢。

Answer 1

请阅读您的例外情况。它声明您的SqlDataReader类访问的数据库中的表只有11列

指数超出范围。 string.format可以保存多少个索引项？

1 个答案: