На этой странице есть код, который выполняет обратное действие - извлекает данные из SQL Server и вставляет их в Excel. Все, что вам нужно сделать, это поменять строки подключения.
Как это:
private System.Data.OleDb.OleDbDataAdapter da ;
private System.Data.DataSet ds;
string sqlSelect="SELECT ProductId, ProductName, QuantityPerUnit, UnitPrice, UnitsInStock, GETDATE() as TimeExtracted from Products order by UnitPrice";
string sqlInsert="INSERT INTO Foo (ProductId, ProductName, QuantityPerUnit, UnitPrice, UnitsInStock, TimeExtracted) VALUES (@ProductId, @ProductName, @QuantityPerUnit, @UnitPrice, @UnitsInStock, @TimeExtracted)";
string ExtractedTableName= "ExtractedData";
private void ReadFromSource()
{
System.Console.WriteLine("Reading from Source...");
string ConnStringSource=
"Provider=Microsoft.Jet.OLEDB.4.0;" +
"Data Source=" + ExcelFilename + ";" +
"Extended Properties=\"Excel 8.0;HDR=yes;\""; // FIRSTROWHASNAMES=1;READONLY=false\"
using (var conn= new System.Data.OleDb.OleDbConnection(ConnStringSource))
{
da= new System.Data.OleDb.OleDbDataAdapter();
da.SelectCommand= new System.Data.OleDb.OleDbCommand(sqlSelect);
da.SelectCommand.Connection= conn;
// this tells the DA to mark all rows as newly inserted.
// upon calling da.Update() (later), all those rows will
// be inserted into the DB.
da.AcceptChangesDuringFill= false;
ds= new System.Data.DataSet();
da.Fill(ds, ExtractedTableName);
}
}
private void InsertIntoDestination()
{
System.Console.WriteLine("Inserting data into Destination...");
string ConnStringDest= "Provider=sqloledb;Data Source=(local);Initial Catalog=Northwind;Integrated Security=SSPI;";
using (var conn= new System.Data.OleDb.OleDbConnection(ConnStringDest))
{
System.Data.OleDb.OleDbCommand cmd= new System.Data.OleDb.OleDbCommand(sqlInsert);
cmd.Parameters.Add("@ProductId", System.Data.OleDb.OleDbType.Integer, 4, "ProductId");
cmd.Parameters.Add("@ProductName", System.Data.OleDb.OleDbType.VarWChar, 40, "ProductName");
cmd.Parameters.Add("@QuantityPerUnit", System.Data.OleDb.OleDbType.VarWChar, 20, "QuantityPerUnit");
cmd.Parameters.Add("@UnitPrice", System.Data.OleDb.OleDbType.Currency, 8, "UnitPrice");
cmd.Parameters.Add("@UnitsInStock", System.Data.OleDb.OleDbType.SmallInt, 2, "UnitsInStock");
cmd.Parameters.Add("@TimeExtracted", System.Data.OleDb.OleDbType.Date, 8, "TimeExtracted");
da.InsertCommand= cmd;
da.InsertCommand.Connection= conn;
da.Update(ds, ExtractedTableName);
// in the event you want to update a datasource via a different DataAdapter --
// for example you want to fill from a System.Data.SqlClient.DataAdapter and
// then Update via a System.Data.Oledb.OledbDataAdapter -- then you could define
// two distinct DataAdapters. Fill the DataSet with the first DA, then Update
// with the second DA.
}
}