IBM Informix Developer's Handbook - IBM Redbooks

Table 8-9 lists the methods that the IfxDataAdapter class provides for accessing
the data.
Table 8-9 IfxDataAdapter public methods
Method Description
Int32 Fill(DataSet) Adds or refreshes rows in the data set
DataTable FillSchema(DataSet,
SchemaType)
IDataParameter
GetFillParameters()
Example 8-10 demonstrates how to retrieve data from the database using the
IfxDataAdapter class. In this example, we retrieve the data rows directly from the
data set.
Example 8-10 The dataadapter_sample.cs sample
using System;
using System.Data;
using IBM.Data.Informix;
class sample {
static void Main(string[] args) {
IfxConnection conn;
268 IBM Informix Developer’s Handbook
conn = new IfxConnection("Server=demo_on;database=stores_demo");
conn.Open();
IfxCommand cmmd = conn.CreateCommand();
cmmd.CommandText = "SELECT * FROM state WHERE code='CA'";
IfxDataAdapter dadap = new IfxDataAdapter();
DataSet dset = new DataSet();
dadap.SelectCommand = cmmd;
dadap.Fill(dset);
Adds a data table to the data set, and
configures the schema to match that in the
database based on the specified SchemaType
Returns the parameters set by the user when
executing a SELECT statement
Int32 Update(DataSet) Executes the SQL statement that is associated
with the InsertCommand, UpdateCommand, or
DeleteCommand for each inserted, updated, or
deleted row in the specified data set
foreach(DataRow dr in dset.Tables[0].Rows) {
Console.WriteLine(String.Format("\tCode\tState\n"));
Console.WriteLine(String.Format("\t{0}\t{1}", dr["code"], dr["sname"]));