Using OracleParameter : Oracle « ADO.Net « C# / CSharp Tutorial

Home
C# / CSharp Tutorial
1.Language Basics
2.Data Type
3.Operator
4.Statement
5.String
6.struct
7.Class
8.Operator Overload
9.delegate
10.Attribute
11.Data Structure
12.Assembly
13.Date Time
14.Development
15.File Directory Stream
16.Preprocessing Directives
17.Regular Expression
18.Generic
19.Reflection
20.Thread
21.I18N Internationalization
22.LINQ
23.GUI Windows Forms
24.Windows Presentation Foundation
25.Windows Communication Foundation
26.Workflow
27.2D
28.Design Patterns
29.Windows
30.XML
31.XML LINQ
32.ADO.Net
33.Network
34.Directory Services
35.Security
36.unsafe
C# / C Sharp
C# / C Sharp by API
C# / CSharp Open Source
C# / CSharp Tutorial » ADO.Net » Oracle 
32.3.10.Using OracleParameter
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.OracleClient;



  public class Form1 : System.Windows.Forms.Form
  {
    private System.Windows.Forms.Button btnConnect;
    private System.Windows.Forms.Button btnGetIDs;
    private System.Windows.Forms.Label label1;
    private System.Windows.Forms.ComboBox cbEmpIds;
    private System.Windows.Forms.Label lblFirstName;
    private System.Windows.Forms.Label lblLastName;
    private System.Windows.Forms.Label label4;
    private System.Windows.Forms.Label label5;
    private System.Windows.Forms.Button btnLookup1;
    private System.Windows.Forms.Button btnLookup2;
    private System.Windows.Forms.Label lblEmail;
    private System.Windows.Forms.Label lblPhone;
    private System.Windows.Forms.Label lblEmailText;
    private System.Windows.Forms.Label lblPhoneText;
    private System.Windows.Forms.Button btnReset;
    private System.Windows.Forms.Button btnNoBinds;
    private System.ComponentModel.Container components = null;

    public Form1()
    {
      this.btnConnect = new System.Windows.Forms.Button();
      this.btnGetIDs = new System.Windows.Forms.Button();
      this.cbEmpIds = new System.Windows.Forms.ComboBox();
      this.label1 = new System.Windows.Forms.Label();
      this.lblFirstName = new System.Windows.Forms.Label();
      this.lblLastName = new System.Windows.Forms.Label();
      this.label4 = new System.Windows.Forms.Label();
      this.label5 = new System.Windows.Forms.Label();
      this.btnLookup1 = new System.Windows.Forms.Button();
      this.btnLookup2 = new System.Windows.Forms.Button();
      this.lblEmail = new System.Windows.Forms.Label();
      this.lblPhone = new System.Windows.Forms.Label();
      this.lblEmailText = new System.Windows.Forms.Label();
      this.lblPhoneText = new System.Windows.Forms.Label();
      this.btnReset = new System.Windows.Forms.Button();
      this.btnNoBinds = new System.Windows.Forms.Button();
      this.SuspendLayout();
      this.btnConnect.Location = new System.Drawing.Point(3244);
      this.btnConnect.Text = "C&onnect";
      this.btnConnect.Click += new System.EventHandler(this.btnConnect_Click);
      this.btnGetIDs.Location = new System.Drawing.Point(3280);
      this.btnGetIDs.Text = "&Get IDs";
      this.btnGetIDs.Click += new System.EventHandler(this.btnGetIDs_Click);
      this.cbEmpIds.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
      this.cbEmpIds.Location = new System.Drawing.Point(14444);
      this.cbEmpIds.Size = new System.Drawing.Size(6821);
      this.label1.Location = new System.Drawing.Point(14424);
      this.label1.Size = new System.Drawing.Size(7216);
      this.label1.Text = "&Employee ID:";
      this.lblFirstName.Location = new System.Drawing.Point(22848);
      this.lblFirstName.Size = new System.Drawing.Size(11616);
      this.lblLastName.Location = new System.Drawing.Point(36448);
      this.lblLastName.Size = new System.Drawing.Size(12816);
      this.label4.Location = new System.Drawing.Point(22824);
      this.label4.Size = new System.Drawing.Size(10016);
      this.label4.Text = "&First Name:";
      this.label5.Location = new System.Drawing.Point(36424);
      this.label5.Size = new System.Drawing.Size(10016);
      this.label5.Text = "&Last Name:";
      this.btnLookup1.Location = new System.Drawing.Point(32116);
      this.btnLookup1.Text = "Lookup &1";
      this.btnLookup1.Click += new System.EventHandler(this.btnLookup1_Click);
      this.btnLookup2.Location = new System.Drawing.Point(32152);
      this.btnLookup2.Text = "Lookup &2";
      this.btnLookup2.Click += new System.EventHandler(this.btnLookup2_Click);
      this.lblEmail.Location = new System.Drawing.Point(22888);
      this.lblEmail.Size = new System.Drawing.Size(10016);
      this.lblEmail.Text = "E&mail:";
      this.lblPhone.Location = new System.Drawing.Point(36488);
      this.lblPhone.Size = new System.Drawing.Size(10016);
      this.lblPhone.Text = "Phone &Number:";
      this.lblEmailText.Location = new System.Drawing.Point(228112);
      this.lblEmailText.Size = new System.Drawing.Size(11616);
      this.lblPhoneText.Location = new System.Drawing.Point(364112);
      this.lblPhoneText.Size = new System.Drawing.Size(12816);
      this.btnReset.Location = new System.Drawing.Point(32224);
      this.btnReset.Text = "&Reset";
      this.btnReset.Click += new System.EventHandler(this.btnReset_Click);
      this.btnNoBinds.Location = new System.Drawing.Point(32188);
      this.btnNoBinds.Text = "No &Binds";
      this.btnNoBinds.Click += new System.EventHandler(this.btnNoBinds_Click);
      this.AutoScaleBaseSize = new System.Drawing.Size(513);
      this.ClientSize = new System.Drawing.Size(534264);
      this.Controls.Add(this.btnNoBinds);
      this.Controls.Add(this.btnReset);
      this.Controls.Add(this.lblPhoneText);
      this.Controls.Add(this.lblEmailText);
      this.Controls.Add(this.lblPhone);
      this.Controls.Add(this.lblEmail);
      this.Controls.Add(this.btnLookup2);
      this.Controls.Add(this.btnLookup1);
      this.Controls.Add(this.label5);
      this.Controls.Add(this.label4);
      this.Controls.Add(this.lblLastName);
      this.Controls.Add(this.lblFirstName);
      this.Controls.Add(this.label1);
      this.Controls.Add(this.cbEmpIds);
      this.Controls.Add(this.btnGetIDs);
      this.Controls.Add(this.btnConnect);
      this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Fixed3D;
      this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
      this.Text = "Oracle Parameter Sample";
      this.Load += new System.EventHandler(this.Form1_Load);
      this.ResumeLayout(false);

    }
    static void Main() 
    {
      Application.Run(new Form1());
    }

    private OracleConnection oraConn;

    private void btnConnect_Click(object sender, System.EventArgs e)
    {
      string connString = "User Id=hr; Password=demo; Data Source=oranet";
      if (oraConn.State != ConnectionState.Open)
      {
        try
        {
          oraConn = new OracleConnection(connString);
          oraConn.Open();
          MessageBox.Show(oraConn.ConnectionString, "Successful Connection");
        }
        catch (Exception ex)
        {
          MessageBox.Show(ex.Message,"Exception Caught");
        }
      }
    }

    private void btnGetIDs_Click(object sender, System.EventArgs e)
    {
      OracleCommand cmdEmpId = new OracleCommand();
      cmdEmpId.CommandText = "select employee_id from employees order by employee_id";
      cmdEmpId.Connection = oraConn;

      try
      {
        OracleDataReader dataReader = cmdEmpId.ExecuteReader();
        while (dataReader.Read())
        {
          cbEmpIds.Items.Add(dataReader.GetDecimal(0));
        }

        dataReader.Dispose();
      }
      catch (Exception ex)
      {
        MessageBox.Show(ex.Message,"Exception Caught");
      }
      finally
      {
        cmdEmpId.Dispose();
      }
    }

    private void Form1_Load(object sender, System.EventArgs e)
    {
      oraConn = new OracleConnection();
    }

    private void btnLookup1_Click(object sender, System.EventArgs e)
    {
      object selectedItem = cbEmpIds.SelectedItem;

      if (selectedItem != null)
      {
        OracleCommand cmdEmpName = new OracleCommand();
        cmdEmpName.CommandText = "select first_name, last_name from employees where employee_id = :p_id";
    
        cmdEmpName.Connection = oraConn;

        OracleParameter p_id = new OracleParameter();

        p_id.DbType = DbType.Decimal;
        p_id.Value = Convert.ToDecimal(selectedItem.ToString());
        p_id.ParameterName = "p_id";

        cmdEmpName.Parameters.Add(p_id);
        OracleDataReader dataReader = cmdEmpName.ExecuteReader();
        if (dataReader.Read())
        {
          lblFirstName.Text = dataReader.GetString(0);
          lblLastName.Text = dataReader.GetString(1);
        }

        dataReader.Close();

        dataReader.Dispose();
        cmdEmpName.Dispose();
      }    
    }

    private void btnLookup2_Click(object sender, System.EventArgs e)
    {
      OracleCommand cmdEmpInfo = new OracleCommand();
      cmdEmpInfo.CommandText = "select email, phone_number from employees where first_name = :p_first and last_name = :p_last";
      cmdEmpInfo.Connection = oraConn;
      OracleParameter p1 = new OracleParameter();
      OracleParameter p2 = new OracleParameter();
      p1.ParameterName = "p_first";
      p2.ParameterName = "p_last";

      p1.Value = lblFirstName.Text;
      p2.Value = lblLastName.Text;
      cmdEmpInfo.Parameters.Add(p2);
      cmdEmpInfo.Parameters.Add(p1);
      OracleDataReader dataReader = cmdEmpInfo.ExecuteReader();
      if (dataReader.Read())
      {
        lblEmailText.Text = dataReader.GetString(0);
        lblPhoneText.Text = dataReader.GetString(1);
      }

      dataReader.Close();

      dataReader.Dispose();
      cmdEmpInfo.Dispose();
    }

    private void btnReset_Click(object sender, System.EventArgs e)
    {
      cbEmpIds.SelectedIndex = -1;
      lblFirstName.Text = "";
      lblLastName.Text = "";
      lblEmailText.Text = "";
      lblPhoneText.Text = "";
    }

    private void btnNoBinds_Click(object sender, System.EventArgs e)
    {
      object selectedItem = cbEmpIds.SelectedItem;

      if (selectedItem != null)
      {
        OracleCommand cmdNoBinds = new OracleCommand();
        cmdNoBinds.Connection = oraConn;
        OracleDataReader dataReader;

        cmdNoBinds.CommandText = "select first_name, last_name from employees where employee_id = " + selectedItem.ToString();

        dataReader = cmdNoBinds.ExecuteReader();
        if (dataReader.Read())
        {
          lblFirstName.Text = dataReader.GetString(0);
          lblLastName.Text = dataReader.GetString(1);
        }

        dataReader.Close();
        cmdNoBinds.CommandText = "select email, phone_number from employees where first_name = '" + lblFirstName.Text + "' and last_name = '" + lblLastName.Text +"'";
        dataReader = cmdNoBinds.ExecuteReader();
        if (dataReader.Read())
        {
          lblEmailText.Text = dataReader.GetString(0);
          lblPhoneText.Text = dataReader.GetString(1);
        }

        dataReader.Close();
        dataReader.Dispose();
        cmdNoBinds.Dispose();
      }
    }
  }
32.3.Oracle
32.3.1.how to use an OleDbConnection object to connect to an Oracle database
32.3.2.A connection string using integrated security for Oracle database
32.3.3.A connection string without integrated security for Oracle database
32.3.4.Get connection state and server version
32.3.5.Using OracleCommand to do query
32.3.6.Using OracleCommand to do the query sql
32.3.7.Using OracleCommandBuilder
32.3.8.Using OracleDataAdapter
32.3.9.Using OracleDataReader to read from Oracle database
32.3.10.Using OracleParameter
32.3.11.Connect to an Oracle Database using .NET data provider for OLE DB
32.3.12.Connect to an Oracle Database using OdbcConnection
32.3.13.Connecting to an Oracle Database with OracleConnection
32.3.14.Do a delete command to Oracle database
32.3.15.Do an insert command to Oracle database
32.3.16.Do an update to Oracle database
32.3.17.Manual Loopup for Oracle database
32.3.18.Read string from OracleDataReader
32.3.19.Use OracleConnection to connect to Oracle database
32.3.20.Rollback for Oracle database
32.3.21.Runs the CustomerAdd stored procedure.
32.3.22.No Connection Pooling
32.3.23.Read decimal from OracleDataReader
32.3.24.Connection String for Oracle database
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.