编程使用c#连接到IBM db2的两种方式

一：使用c#通过odbc连接到IBM db2
使用 ConnectionString 属性连接到各种数据源。

部署：只要在客户端安装IBM DB2 ODBC driver。配置DSn即可。

1)：可以单独下载DB2 Run-Time Client，大约（86.6m)，安装后则odbc驱动程序安装成功。下载地址：ftp://ftp.software.ibm.com/ps/products/db2/fixes2/english-us/db2winIA32v8/fixpak/FP17a_WR21440/FP17a_WR21440_RTCL.exe
2)：也可以直接安装ibm db2数据库后，该驱动程序自动安装。下载地址http://www6.software.ibm.com/sdfdl/v2/regs2/db2pmopn/Express-C/DB2ExpressC9/Xa.2/Xb.AjZr_0m973fVBNZX63eCwwrnyaoISX2bvOX3Ehc/Xc.db2exc_952_WIN_x86.zip/Xd./Xf.LPr.D1vk/Xg.4854742/Xi.swg-db2expresscviper2/XY.regsrvs/XZ.C7tZ8b_Fn0_ruc3stDVpbwY2QpI/db2exc_952_WIN_x86.zip

测试通过
1:dsn
2:driver

代码：
private const string dsn = "DSN=OutBound";
private const string conn = "Driver={IBM DB2 ODBC DRIVER};Database=sample;hostname=192.168.1.46;port=50000;protocol=TCPIP; uid=admin; pwd=admin";

private void button1_Click(object sender, EventArgs e)
{
// OdbcDataReader reader = ExecuteReader(dsn, "select * from admin.vi_cs_precalloutcust");
OdbcDataReader reader = ExecuteReader(conn, "select * from admin.vi_cs_precalloutcust");
while (reader.Read())
{

if (!reader.IsDBNull(0))
{
this.textBox1.Text += reader[0].ToString() + "\r\n";
}
}
reader.Close();

}

public static OdbcDataReader ExecuteReader(string connectionStr, string strSQL)
{
OdbcConnection connection = new OdbcConnection(connectionStr);

OdbcCommand cmd = new OdbcCommand(strSQL, connection);
try
{
connection.Open();
OdbcDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return myReader;
}
catch (SqlException E)
{
WriteLogFile.WriteMessage("DBOper.log", "error DBHelper.ExecuteReader " + E.Message.ToString());
}
return null;
}

二：使用c#通过


连接到IBM db2

参见https://www6.software.ibm.com/developerworks/cn/dmdd/library/tutorials/dm0504hoy/tutorial/index.html

部署：需要客户端安装DB2 Runtime Client Lite。大约500多M。下载地址ftp://ftp.software.ibm.com/ps/products/db2/fixes2/english-us/db2winIA32v8/fixpak/FP17_WR21416/FP17_WR21416_RTLITE.zip

测试未通过。发布到另外一台机器，总是显示“Length cannot be less than zero. Parameter name: length ”的错误。
代码：
vs2005测试通过，引用IBM.Data.DB2.dll（net2.0版本）,引用IBM.Data.ApplicationBlocks.DB2.dll

private void button1_Click(object sender, EventArgs e)
{
DB2DataReader dr = null;
string connString = "DATABASE=SAMPLE;SERVER=192.168.1.46:50000;User ID=admin;Password=admin;";
try
{
dr = DB2Helper.ExecuteReader(connString, CommandType.Text, "select * from vi_cs_precalloutcust");

while (dr.Read())
{
txtResults.Text = txtResults.Text + dr.GetValue(0) + " (" + dr.GetValue(1) + ")" + Environment.NewLine;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString());
}

if (dr != null)
{
((IDisposable)dr).Dispose();

}

}