CODEWITHSUNDEEP
c#linq
Max Li
Max Li

Reputation: 5199

Get the content of a row from sqlDataReader as a list

I have a SqlDataReader reader, where I don't know the data structure in advance, i.e. the number of columns is unkown. I'd like to put the table in csv file. I retrieve the columns from

System.Data.DataTable dt = reader.GetSchemaTable();

So I have them in dt.Columns() after it. Then, I want to do something like this:

while (reader.Read())
{
    writer.WriteLine(string.Join(";",ListWithRowContent))
}

However, I have it hard to put the content of a row into ListWithRowContent list with something like linq .Select , but "reader" object can't be queried.
Question: how to do it (please no for loop!)?

Upvotes: 2

Views: 3265

Answers (1)

Dennis
Dennis

Reputation: 37770

Assuming, that reader is positioned on any record:

var values = new Object[reader.FieldCount];

reader.GetValues(values);

writer.WriteLine(string.Join(";", values.Select(v => v.ToString())));

or more convenient way (FW 4.0 or higher):

var values = new Object[reader.FieldCount];

reader.GetValues(values);

writer.WriteLine(string.Join(";", values));

Upvotes: 6

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