How to convert DataSet to DataTable

Question

I am retrieving data from a SQL table so I can display the result on the page as a HTML table  Later I need to be able to save that table as a CSV file    So far I have figured out how to retrieve the data and fill them in a dataset for display purpose  which is working perfectly              string selectQuery    SELECT Name  ProductNumber  ListPrice FROM Poduction Product               Establish the connection to the SQL database          SqlConnection conn   ConnectionManager GetConnection            conn Open                Connect to the SQL database using the above query to get all the data from table          SqlDataAdapter myCommand   new SqlDataAdapter selectQuery  conn               Create and fill a DataSet          DataSet ds   new DataSet            myCommand Fill ds     and how to save them in a CSV file with the help of following code from  http   www evontech com login topic 1983 html      private void exportDataTableToCsv DataTable formattedDataTable  string filename               DataTable toExcel   formattedDataTable Copy           HttpContext context   HttpContext Current         context Response Clear            foreach  DataColumn column in toExcel Columns                     context Response Write column ColumnName                          context Response Write Environment NewLine          foreach  DataRow row in toExcel Rows                     for  int i   0  i  lt  toExcel Columns Count  i                             context Response Write row ToString   Replace      string Empty                                 context Response Write Environment NewLine                    context Response ContentType    text csv          context Response AppendHeader  Content-Disposition    attachment  filename     filename     csv           context Response End            Now my problem is how do I convert this DataSet to DataTable  I have tried the way described here with NO luck  http   www ezineasp net post ASP-Net-C-sharp-Convert-DataSet-to-DataTable aspx  Can anyone help me

User · Answer

DataSet is collection of DataTables     you can get the datatable from DataSet as below     here ds is dataset DatTable dt   ds Table 0       table of dataset

User · Answer

A DataSet already contains DataTables  You can just use   DataTable firstTable   dataSet Tables 0     or by name   DataTable customerTable   dataSet Tables  Customer      Note that you should have using statements for your SQL code  to ensure the connection is disposed properly   using  SqlConnection conn                 Code here

User · Answer

Here is my solution   DataTable datatable    DataTable dataset datatablename

[c#] How to convert DataSet to DataTable

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