C＃中没有行位置 [英] No row position in C#

问题描述

发生错误0位没有排



我尝试过：

there is error occurred "There is no row at position 0"

What I have tried:

i try this code

if (ds.Tables[0].Rows[0]["NRType"].ToString() == "0002")
                {

                    ReportObj.ReportFileName = "report1.rpt";
                }
                else if (ds.Tables[0].Rows[0]["NRType"].ToString() == "0011")
                {
                    ReportObj.ReportFileName = "report2.rpt";
                }
                else if (ds.Tables[0].Rows[0]["NRType"].ToString() == "0007")
                {
                    ReportObj.ReportFileName = "report3.rpt";
                }


Any solutions?

推荐答案

在使用前验证对象

Validate the objects before usage

if (ds != null && ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)
           {
               string nrType = ds.Tables[0].Rows[0]["NRType"] + "";
               if(nrType =="0002" )
                   ReportObj.ReportFileName = "report1.rpt";
               else if (nrType =="0011")
                   ReportObj.ReportFileName = "report2.rpt";
               else if (nrType == "0007")
                   ReportObj.ReportFileName = "report3.rpt";

           }

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