在.NET中调用DataWindow操作数据库

在.NET中调用DataWindow操作数据库

Sybase在2004/1/19日推出了Pb 10 beta1版本，其中包含DataWindow.NET 1.0,这真是一个另人兴奋的消息! 在PB市场日益萎缩的今天，在.NET大行其道的今天Sybase公司终于推出了DataWindow.NET,它支持DataWindow绝大部份原有事件和属性，PB技术终于可以重新又派上用场了!!

下过来安装程序，便急不可待的在VS.NET2003下面做了一个简单的例子，发现真的很好用!源代码、界面如下：



using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;

namespace cjgl.Report
{
/// <summary>
/// DataWindowTest 的摘要说明。
/// </summary>
public class DataWindowTest : System.Windows.Forms.Form
{
private Sybase.DataWindow.DataWindowControl dw;
private Sybase.DataWindow.Transaction Trans;
private System.Windows.Forms.Button btnRetrieve;
private System.Windows.Forms.Button btnDelete;
private System.Windows.Forms.Button btnInsert;
private System.Windows.Forms.Button btnSave;
private System.ComponentModel.IContainer components;

public DataWindowTest()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();

//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//

}

/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.btnRetrieve = new System.Windows.Forms.Button();
this.btnDelete = new System.Windows.Forms.Button();
this.btnInsert = new System.Windows.Forms.Button();
this.dw = new Sybase.DataWindow.DataWindowControl();
this.Trans = new Sybase.DataWindow.Transaction(this.components);
this.btnSave = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// btnRetrieve
//
this.btnRetrieve.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
this.btnRetrieve.Location = new System.Drawing.Point(360, 297);
this.btnRetrieve.Name = "btnRetrieve";
this.btnRetrieve.TabIndex = 1;
this.btnRetrieve.Text = "Retrieve";
this.btnRetrieve.Click += new System.EventHandler(this.btnRetrieve_Click);
//
// btnDelete
//
this.btnDelete.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
this.btnDelete.Location = new System.Drawing.Point(260, 296);
this.btnDelete.Name = "btnDelete";
this.btnDelete.TabIndex = 2;
this.btnDelete.Text = "Delete";
this.btnDelete.Click += new System.EventHandler(this.btnDelete_Click);
//
// btnInsert
//
this.btnInsert.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
this.btnInsert.Location = new System.Drawing.Point(152, 295);
this.btnInsert.Name = "btnInsert";
this.btnInsert.TabIndex = 3;
this.btnInsert.Text = "Insert";
this.btnInsert.Click += new System.EventHandler(this.btnInsert_Click);
//
// dw
//
this.dw.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.dw.DataWindowObject = "dw_customer";
this.dw.LibraryList = "D://Program Files//Sybase10//DataWindow Builder 1.0//dwb100.pbl";
this.dw.Location = new System.Drawing.Point(5, 5);
this.dw.Name = "dw";
this.dw.ScrollBars = System.Windows.Forms.ScrollBars.Both;
this.dw.Size = new System.Drawing.Size(432, 280);
this.dw.TabIndex = 4;
this.dw.Text = "dataWindowControl1";
this.dw.TypeOfDataWindow = Sybase.DataWindow.DataWindowType.Grid;
//
// Trans
//
this.Trans.Database = "asademo9.dba";
this.Trans.Dbms = Sybase.DataWindow.DbmsType.OleDb;
this.Trans.DbParameter = "PROVIDER=/'ASAProv.90/'";
this.Trans.Password = "sql";
this.Trans.ServerName = "asademo9";
this.Trans.UserID = "dba";
//
// btnSave
//
this.btnSave.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
this.btnSave.Location = new System.Drawing.Point(46, 296);
this.btnSave.Name = "btnSave";
this.btnSave.TabIndex = 5;
this.btnSave.Text = "&Save";
this.btnSave.Click += new System.EventHandler(this.btnSave_Click);
//
// DataWindowTest
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(444, 333);
this.Controls.Add(this.btnSave);
this.Controls.Add(this.dw);
this.Controls.Add(this.btnInsert);
this.Controls.Add(this.btnDelete);
this.Controls.Add(this.btnRetrieve);
this.Name = "DataWindowTest";
this.Text = "利用DataWindow.NET设计";
this.ResumeLayout(false);

}
#endregion

private void btnRetrieve_Click(object sender, System.EventArgs e)
{
try
{
if ( !Trans.IsConnected)
{
Trans.Connect();
}
dw.SetTransObject(Trans);
dw.Retrieve();

}
catch( Sybase.DataWindow.DbErrorException ee)
{
MessageBox.Show("数据库连接出错！"+ee.SqlErrorText);
return;
}
}

private void btnInsert_Click(object sender, System.EventArgs e)
{
//插入一行
int insertRow = dw.InsertRow(0);
dw.Scroll(insertRow);
//赋初值
dw.SetItemDouble(insertRow,"id",9999);
dw.SetItemString(insertRow,"fName","Huang");
dw.SetItemString(insertRow,"lName","Yong");
dw.SetItemString(insertRow,"address","ChangSha");
dw.SetItemString(insertRow,"city","ChangSha");
}

private void btnDelete_Click(object sender, System.EventArgs e)
{
dw.DeleteRow(dw.CurrentRow);
}

private void btnSave_Click(object sender, System.EventArgs e)
{
try
{
dw.Update();
Trans.Commit();
}
catch (Sybase.DataWindow.DbErrorException ee)
{
MessageBox.Show("更新不成功！原因："+ee.SqlErrorText);
Trans.Rollback();
}
catch (Sybase.DataWindow.DataWindowNotCreatedException ee)
{
MessageBox.Show("数据窗口还没有创建！");
Trans.Rollback();
}
catch(Sybase.DataWindow.MethodFailureException ee)
{
MessageBox.Show("更新不成功！原因："+ee.Message.ToString());
Trans.Rollback();
}
}

}
}
通过PB,或DataWindow Builder创建PBL库和DataWindow对象后，就像在PB中操作一样，指定PBL库位置和DataWindow控件相关连DataWindow对象,就可对DataWindow进行相关的操作如dw.SetTransObject(Trans);dw.Retrieve();怎么样？对原PB
程序员来说很熟悉吧!

如果觉得不错，可以到陶清网站去下载PB10Bete1版本：) http://www.pdriver.com/display.asp?key_id=1563