Have a look at the sample below. Here two parameters
@Country
and
@City
are used.
Each of these has the type varchar associated with it.
OleDbDataAdapter da = new OleDbDataAdapter();
OleDbCommand cmd;
OleDbParameter parm;
cmd = new OleDbCommand("SELECT * FROM Customers " +
"WHERE Country = @Country AND City = @City", conn);
cmd.Parameters.Add("@Country", OleDbType.VarChar, 15);
cmd.Parameters.Add("@City", OleDbType.VarChar, 15);
da.SelectCommand = cmd;
cmd = new OleDbCommand("UPDATE Customers SET CustomerID = @CustomerID, CompanyName = @CompanyName " +
"WHERE CustomerID = @oldCustomerID", conn);
cmd.Parameters.Add("@CustomerID", OleDbType.Char, 5, "CustomerID");
cmd.Parameters.Add("@CompanyName", OleDbType.VarChar, 40, "CompanyName");
parm = cmd.Parameters.Add("@oldCustomerID", OleDbType.Char, 5, "CustomerID");
parm.SourceVersion = DataRowVersion.Original;
da.UpdateCommand = cmd;
return da;
Have a look at
this[
^] msdn link for more information.