Author:  veeresh Member Level: Diamond Member Rank: 0 Date: 23/Jan/2007 Rating:  Points: 2 |
One way to fill a DataSet with multiple tables is to send the database multiple requests. Another way to do this is to use multiple SELECT statements in a single request.
There are a couple of problems with doing it this way:
The DataTables don't have the same name as the tables in the database, you have to set them yourself
You can't update/save the tables to the database; to do that you must use a seperate DataAdapter for each table.
Dim myAdapter as SqlDataAdapter = new SqlDataAdapter(
“SELECT * FROM Customers; SELECT * FROM Orders“, connection)
myAdapter.Fill(dsTables)
dsTables.Tables(0).TableName = “Customers“)
dsTables.Tables(1).TableName = “Orders“)
It would be so much easier if they made it so you can use the same DataAdapter to update all the tables you load into the DataSet with the DataAdapter.
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| Author: veeresh Member Level: Diamond Member Rank: 0 Date: 23/Jan/2007 Rating: Points: 2 |
Populate a DataSet with multiple DataTable objects using multiple SELECT statements
using System;
using System.Data;
using System.Data.SqlClient;
class MultipleDataTables
{
public static void Main()
{
SqlConnection mySqlConnection =new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI;");
SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
mySqlCommand.CommandText =
"SELECT TOP 2 ID, FirstName, LastName " +
"FROM Employee " +
"ORDER BY ID;" +
"SELECT ID, LastName " +
"FROM MyEmployee " +
"WHERE ID = 9;";
SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
mySqlDataAdapter.SelectCommand = mySqlCommand;
DataSet myDataSet = new DataSet();
mySqlConnection.Open();
int numberOfRows = mySqlDataAdapter.Fill(myDataSet);
Console.WriteLine("numberOfRows = " + numberOfRows);
mySqlConnection.Close();
myDataSet.Tables["Table"].TableName = "Employee";
myDataSet.Tables["Table1"].TableName = "MyEmployee";
}
}
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Author:  Vadivel Mohanakrishnan Member Level: Diamond Member Rank: 0 Date: 23/Jan/2007 Rating: Points: 2 |
There are multiple ways of doing it.
1. Make use of multiple select statements within your adapter. The only pt to note is, you need to make use of semicolon (;) between two queries.
2. Easiest of the lot is to make use of Stored procedure. Within a stored procedure write multiple select statements. Recordset returned by each query would get filled within one datatable in the given Dataset.
Best Regards
Vadivel
MVP SQL Server
http://vadivel.blogspot.com
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Author:  Venkatesh Murali Member Level: Gold Member Rank: 0 Date: 19/Dec/2007 Rating: Points: 2 |
Populate a DataSet with multiple DataTable objects using multiple SELECT statements
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| Author: Venkatesh Murali Member Level: Gold Member Rank: 0 Date: 19/Dec/2007 Rating: Points: 2 |
Populate a DataSet with multiple DataTable objects using multiple SELECT statements
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Author:  pappan Member Level: Gold Member Rank: 0 Date: 29/Mar/2008 Rating: Points: 2 |
adp=new SqldataAdpter=("select * from TN1",con);
adp=new SqldataAdpter=("select * from TN2",con);
adp.Fill(DS);
DS.Tables(0).TableName = “TN1“)
Ds.Tables(1).TableName = “TN2“)
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