asp.net 通用的连接金沙国际官网实例代码

 更新时间:2013年08月14日 11:14:14   作者:   我要评论

金沙国际官网连接是所有程序开发是会用到的,只是不同程序与金沙国际官网连接的方法不一样,下面我来介绍asp.net中金沙国际官网连接代码,有需要的朋友可以参考一下

View Code

复制代码 代码如下:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>


<center>
<h2><font face="宋体">访问金沙国际官网的通用代码实例</font>
</h2>
</center>
<body>
    <form id="form1" runat="server">
    <div>

    <font face="宋体">
<p align="center">1.请输入相应金沙国际官网连接字符串</p>
<p align="center">
<asp:TextBox id="ConnStrTextBox" runat="server" Width="600"></asp:TextBox>
</p>
<p align="center">2.请输入相应SQL查询命令语句</p>
<p align="center">
<asp:TextBox id="SqlTextTextBox" runat="server" Width="600"></asp:TextBox>
</p>
<p align="center">3.请选择所连接的金沙国际官网类型</p>
<p align="center">
    <asp:DropDownList ID="DBDropDownList" runat="server" Width="204px">
        <asp:ListItem Selected="True">Access</asp:ListItem>
        <asp:ListItem>SQLServer</asp:ListItem>
        <asp:ListItem>Oracle</asp:ListItem>
        <asp:ListItem>DB2</asp:ListItem>
    </asp:DropDownList>
</p>
<p align="center">

<asp:Button ID="Button1" runat="server" onclick="Button1_Click"  Text="通用金沙国际官网连接代码测试" />

</p>
<p align="center">
<asp:Label id="lblMessage" runat="server" Font-Bold="True" ForeColor="Red"></asp:Label>
</p>
    </form>
</font>
</div>

asp.net页面

复制代码 代码如下:

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        //通用金沙国际官网连接代码,这里以连接Access金沙国际官网为测试示例
        if (!IsPostBack)
        {
           ConnStrTextBox.Text = "Provider=Microsoft.Jet.OLEDB.4.0; Data source=" + Server.MapPath("User.mdb");
           SqlTextTextBox.Text = "Select COUNT(*) From Info Where Name='小顾'";
            lblMessage.Text = "";
        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {

        //定义金沙国际官网连接字符串
        string MyConnectionString = this.ConnStrTextBox.Text;
        //定义查询操作的SQL语句
        string MySQL = this.SqlTextTextBox.Text;
        //定义所要连接的金沙国际官网类型为Access
        string MyType = this.DBDropDownList.SelectedValue;
        System.Data.IDbConnection MyConnection = null;
        // 根据金沙国际官网类型,创建相应的 Connection 对象
        switch (MyType)
        {
            //选择的金沙国际官网类型为“SQLServer”,创建SqlConnection类金沙国际官网连接对象
            case "SQLServer":
                MyConnection = new System.Data.SqlClient.SqlConnection(MyConnectionString);
                break;
            case "Oracle":
                MyConnection = new System.Data.OracleClient.OracleConnection(MyConnectionString);
                break;
            //选择的金沙国际官网类型为“Access”,创建OleDbConnection类金沙国际官网连接对象
            case "Access":
                MyConnection = new System.Data.OleDb.OleDbConnection(MyConnectionString);
                break;
            //选择的金沙国际官网类型为“DB2”,创建OleDbConnection类金沙国际官网连接对象
            case "DB2":
                MyConnection = new System.Data.Odbc.OdbcConnection(MyConnectionString);
                break;
            default:
                MyConnection = new System.Data.OleDb.OleDbConnection(MyConnectionString);
                break;
        }
        Execute(MyConnection, MySQL);
    }
    public void Execute(System.Data.IDbConnection MyConnection, string strquery)
    {
        //使用 CreateCommand() 方法生成 Command 对象
        System.Data.IDbCommand MyCommand = MyConnection.CreateCommand();
        //执行定义的SQL查询语句
        MyCommand.CommandText = strquery;
        try
        {
            //打开金沙国际官网连接
            MyConnection.Open();
            //定义查询的结果信息
            String MyInfo = "测试连接成功!符合查询要求的记录共有:" + MyCommand.ExecuteScalar().ToString() + "条!";
            //输出查询结果信息
            lblMessage.Text = MyInfo;
        }
        catch (Exception ex)
        {
            //输出错误异常
            Response.Write(ex.ToString());
        }
        finally
        {
            //关闭金沙国际官网连接
            MyConnection.Close();
        }
    }
}

本段程序的核心代码为

复制代码 代码如下:

//选择的金沙国际官网类型为“SQLServer”,创建SqlConnection类金沙国际官网连接对象
case "SQLServer":
           MyConnection = new System.Data.SqlClient.SqlConnection(MyConnectionString);
                break;
case "Oracle":
           MyConnection = new System.Data.OracleClient.OracleConnection(MyConnectionString);
                break;
            //选择的金沙国际官网类型为“Access”,创建OleDbConnection类金沙国际官网连接对象
case "Access":
           MyConnection = new System.Data.OleDb.OleDbConnection(MyConnectionString);
                break;
            //选择的金沙国际官网类型为“DB2”,创建OleDbConnection类金沙国际官网连接对象
case "DB2":
           MyConnection = new System.Data.Odbc.OdbcConnection(MyConnectionString);
                break;
default:
            MyConnection = new System.Data.OleDb.OleDbConnection(MyConnectionString);
                break;


如果你要其它连接我们还可以增加一些连接代码哦。

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