C#操作VFP的dbf数据库文件实例
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实例中分别使用Oledb和Odbc操作vfp数据库dbf文件，操作包括：读取，增删改。
已测试可直接使用，使用方法：下面代码分两个部分aspx和cs，在vs2005中新建网站项目，分别copy文件到想要的文件中即可。
aspx页面： <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>无标题页</title> </head> <body> <form id="form1" runat="server"> <div> <center> <h2>C#操作VFP的dbf数据库文件实例</h2><hr /> <asp:gridview Width="400px" ID="Gridview1" runat="server"></asp:gridview> <asp:Button ID="btnInti" runat="server" OnClick="btnInti_Click" Text="createTable" /> <br /> <asp:Button ID="btnInsert" runat="server" OnClick="btnInsert_Click" Text="btnInsert" /> <asp:Button ID="btnUpdate" runat="server" OnClick="btnUpdate_Click" Text="btnUpdate" /> <asp:Button ID="btnDelete" runat="server" OnClick="btnDelete_Click" Text="btnDelete" /> <br /> <asp:Button ID="btnShowWithOledb" runat="server" OnClick="btnShowWithOledb_Click" Text="showWithOledb" /> <asp:Button ID="btnShowWithOdbc" runat="server" OnClick="btnShowWithOdbc_Click" Text="showWithOdbc" /> </center> </div> <span style="color: red">* 首先:在d盘下创建testDB的VFP数据库.然后可使用vs2005测试. 其中必须要先创建表，即：点击createTable按钮。</span> </form> </body> </html>
cs代码：
using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.Odbc; using System.Data.OleDb; public partial class _Default : System.Web.UI.Page { /// <summary> /// 数据文件 /// </summary> private static string table = @"D:User.dbf"; /// <summary> /// Odbc链接字符串 ,其中SourceDB可以是dbf文件所在的目录也可以制定到文件,作用是一样的,如:SourceDB=d:;或SourceDB==D:Allart.dbf /// </summary> private static string strConn = @"Driver={Microsoft Visual FoxPro Driver};SourceType=DBF;SourceDB=d:;Exclusive=No;NULL=NO;Collate=Machine;BACKGROUNDFETCH=NO;DELETED=NO"; /// <summary> /// Oledb链接字符串 /// 1,到微软网站下载<Microsoft OLE DB Provider for Visual FoxPro 9.0>并安装,这样oledb才能识别provider=VFPOLEDB.1, /// http://www.microsoft.com/downloads/thankyou.aspx?familyId=e1a87d8f-2d58-491f-a0fa-95a3289c5fd4&displayLang=en /// 2,其中SourceDB可以是dbf文件所在的目录也可以制定到文件,作用是一样的,如:data source=d:;或data source==D:Allart.dbf /// </summary> private static string strOledbConn = @"provider=VFPOLEDB.1;data source=d:;user id=admin;password="; protected void Page_Load(object sender, EventArgs e) { } /// <summary> /// 初始化vfp数据库，创建user表 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void btnInti_Click(object sender, EventArgs e) { string strOledbConn = @"provider=VFPOLEDB.1;data source=d: estDB.dbc;user id=admin;password="; OleDbConnection conn = new OleDbConnection(strOledbConn); OleDbCommand cmd = new OleDbCommand(); string sql = "CREATE TABLE User (ID c(6) ,Name C(20),BirthDay t,Salary n(6,2))"; cmd.CommandText = sql; cmd.Connection = conn; conn.Open(); cmd.ExecuteNonQuery(); conn.Close(); showDataWithOdbc(); Response.Write("表格生成成功！"); } /// <summary> /// 插入数据 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void btnInsert_Click(object sender, EventArgs e) { OdbcConnection conn = new OdbcConnection(strConn); OdbcCommand cmd = new OdbcCommand(); //字符c,时间t,数字n string sql = "insert into " + table + "(id,name,birthday,salary) values('1','haha',{^1985-09-10},3300.1)"; cmd.CommandText = sql; cmd.Connection = conn; conn.Open(); cmd.ExecuteNonQuery(); conn.Close(); showDataWithOdbc(); Response.Write("表格插入成功！"); } /// <summary> /// 更新数据 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void btnUpdate_Click(object sender, EventArgs e) { OdbcConnection conn = new OdbcConnection(strConn); OdbcCommand cmd = new OdbcCommand(); string sql = "update " + table + " set ID ='2',name='haha2'"; cmd.CommandText = sql; cmd.Connection = conn; conn.Open(); cmd.ExecuteNonQuery(); conn.Close(); showDataWithOdbc(); Response.Write("表格更新成功！"); } /// <summary> /// 删除数据 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void btnDelete_Click(object sender, EventArgs e) { OdbcConnection conn = new OdbcConnection(strConn); OdbcCommand cmd = new OdbcCommand(); string sql = "delete from " + table; cmd.CommandText = sql; cmd.Connection = conn; conn.Open(); cmd.ExecuteNonQuery(); conn.Close(); showDataWithOdbc(); Response.Write("表格删除成功！"); } /// <summary> /// 使用Oledb显示数据中数据 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void btnShowWithOledb_Click(object sender, EventArgs e) { showDataWithOledb(); Response.Write("成功调用Oledb显示数据！"); } /// <summary> /// 使用Odbc显示数据中数据 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void btnShowWithOdbc_Click(object sender, EventArgs e) { showDataWithOdbc(); Response.Write("成功调用Odbc显示数据！"); } /// <summary> /// 使用Odbc驱动链接数据库并显示数据 /// </summary> private void showDataWithOdbc() { OdbcConnection conn = new OdbcConnection(); conn.ConnectionString = strConn; conn.Open(); string sql = @"select * from " + table; OdbcDataAdapter da = new OdbcDataAdapter(sql, conn); DataTable dt = new DataTable(); da.Fill(dt); Gridview1.DataSource = dt.DefaultView; Gridview1.DataBind(); conn.Close(); } /// <summary> /// 使用OleDb驱动链接数据库并显示数据 /// </summary> private void showDataWithOledb() { OleDbConnection conn = new OleDbConnection(); conn.ConnectionString = strOledbConn; conn.Open(); string sql = @"select * from " + table ; OleDbDataAdapter da = new OleDbDataAdapter(sql, conn); DataTable dt = new DataTable(); da.Fill(dt); Gridview1.DataSource = dt.DefaultView; Gridview1.DataBind(); conn.Close(); } }