数据读取器到数据表复制Rcore [英] Data Reader to DataTable Copy the Rcore

问题描述

如何从DataReader传输Datatable中记录的所有内容

当我使用
datatable.load(datareader);

第一条记录丢失了
表示
我的查询给出4条记录数据表只有3条记录缺少第一条记录；

How To Transfer the all Recored in Datatable From DataReader

when i use
datatable.load(datareader);

the first record is missing
means
my query is giving 4 record dataTable Has only 3 record the first record is missing;

推荐答案

有根据的猜测:
您在执行此操作吗?

Without seeing your code, I can only make an educated guess:
Are you doing this:

SqlDataReader reader = cmd.ExecuteReader();
DataTable dt = new DataTable();
if (reader.Read())
    {
    dt.Load(reader);
    }

因为这是问题所在:Read方法从列表中删除了一条记录...


此代码已成功运行，但缺少最高记录"


是的-Read()方法调用将删除第一条记录.不要叫Read.相反，请检查 reader.HasRows [


试试:

Because, if you are, that''s your problem: the Read method removes one of the records from the list...


"this code is run succesfully but top record is missing"


Yes - the Read() method call removes the first record. Don''t call Read. Instead, check reader.HasRows[^]


"but any option to send data into datatable from datareader"


Try:

SqlDataReader reader = cmd.ExecuteReader();
DataTable dt = new DataTable();
if (reader.HasRows)
    {
    dt.Load(reader);
    }

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