C#删除DBF中的记录不成功，请大家指教
打开一个DBF数据文件后将数据绑定到一个Gridview中显示，同时给Gridview增加了删除事件的处理来删除文件中的某一行，问题是删除不了，出现下面的错误：ERROR [42000] [Microsoft][ODBC Visual FoxPro Driver]Syntax error. 前台代码：
<html xmlns="http://www. >
<head runat="server">
<title>本科单位数据导入</title>
</head>
<body>
<form id="form1" runat="server">
<div id="main" style="width:100%; height:700px; background-color:#DEDFD">
<table>
<tr><td style="width: 179px; height: 23px;">
<asp:FileUpload ID="FileUpload1" runat="server" Height="28px" Width="225px" /></td><td style="width: 188px; height: 23px;">
<asp:Button ID="Button1" runat="server" Height="33px" OnClick="Button1_Click" Text="预览数据"
Width="116px" /></td><td style="width: 295px; height: 23px">
<asp:Button ID="Button2" runat="server" Height="31px" Text="导入表中" Width="123px" OnClick="Button2_Click" /></td><td style="width: 411px; height: 23px;">
<input id="Hidden1" runat="server" style="height: 25px" type="hidden" /></td>
</tr>
<tr><td style="width: 172px; height: 603px;" colspan="4">
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" BackColor="White"
BorderColor="White" BorderStyle="Ridge" BorderWidth="2px" CellPadding="3" CellSpacing="1"
GridLines="None" Height="589px" Width="1152px" AllowPaging="True" OnPageIndexChanging="GridView1_PageIndexChanging" OnRowDeleting="GridView1_RowDeleting" OnRowDataBound="GridView1_RowDataBound">
<FooterStyle BackColor="#C6C3C6" ForeColor="Black" />
<Columns>
<asp:BoundField DataField="BYDWDM" HeaderText="本科单位代码"/>
<asp:BoundField DataField="BYDWMC" HeaderText="本科单位名称"/>
<asp:BoundField DataField="SZSSM" HeaderText="所在省市码"/>
<asp:BoundField DataField="SZSS" HeaderText="所在省市"/>
<asp:BoundField DataField="OLDDWDM" HeaderText="旧代码"/>
<asp:BoundField DataField="OLDDWMC" HeaderText="旧名称"/>
<asp:CommandField HeaderText="删除" ShowDeleteButton="True" />
</Columns>
<RowStyle BackColor="#DEDFDE" ForeColor="Black" />
<SelectedRowStyle BackColor="#9471DE" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#C6C3C6" ForeColor="Black" HorizontalAlign="Right" />
<HeaderStyle BackColor="#4A3C8C" Font-Bold="True" ForeColor="#E7E7FF" />
<PagerSettings FirstPageText="首页" LastPageText="尾页" Mode="NextPreviousFirstLast"
NextPageText="下一页" PreviousPageText="上一页" />
</asp:GridView>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
后台代码如下：
private void bind_gridview()
{
DataTable ta = new DataTable();
string data_source = Hidden1.Value.ToString();
ta = toracle.DBTable(@data_source);
GridView1.DataSource = ta;
GridView1.DataKeyNames = new string[] { "BYDWDM" };
GridView1.DataBind();
}
//绑定GridView
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
string sava_dbf_path =Hidden1.Value.ToString();
string dbf_connectionstring = @"Driver={Microsoft Visual FoxPro Driver};SourceType=DBF;SourceDB=" +@sava_dbf_path + ";Exclusive=No;NULL=NO;Collate=Machine;BACKGROUNDFETCH=NO;DELETED=NO";
System.Data.Odbc.OdbcConnection del_conn = new OdbcConnection();
string keys = GridView1.DataKeys[e.RowIndex].Value.ToString();
// string del_sql = "delete from"+ @sava_dbf_path + "where BYDWDM ='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
string del_sql = "delete from " + @sava_dbf_path + "where Bydwdm=" + keys;
//sava_dbf_path=F:\09省考试院\dmbkdw本科单位.dbf
del_conn.ConnectionString = dbf_connectionstring;
try
{
del_conn.Open();
}
catch (Exception ex)
{
throw ex;
}
OdbcCommand comm = new OdbcCommand();
comm.Connection = del_conn;
= del_sql;
= CommandType.Text;
try
{
comm.ExecuteNonQuery();
}
catch (Exception excep)
{
throw excep;
}
if (this.GridView1.Rows.Count == 1 && this.GridView1.PageIndex > 0)
{
this.GridView1.PageIndex--;
}
bind_gridview();
}
请高手指导
