CS1009:无法识别的转义序列

本文关键字：转义序列 识别 CS1009 | 更新日期: 2023-09-27 18:20:58

我用以下连接字符串创建了一个站点。

我收到以下错误信息，如有任何帮助，我们将不胜感激。

编译器错误消息：CS1009:无法识别的转义序列
Line 21: ad.DataFile = "D:'Hosting'9372580'html'pearl'Pearl.mdb";

我的代码：

using System;
using System.Data;
using System.Configuration;
using System.Collections;
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.OleDb;
public partial class html_Show_Projinfo : System.Web.UI.Page
{
    OleDbCommand cmd;
    OleDbConnection con = new OleDbConnection();
    OleDbDataReader rd;
    protected void Page_Load(object sender, EventArgs e)
    {
        int id = Convert.ToInt32(Request.QueryString["id"]);
        con.ConnectionString = ConfigurationManager.ConnectionStrings["pearl"].ToString();
        cmd = new OleDbCommand("Select * from Pearl_Projects where ProjectId=" + id, con);
        con.Open();
        rd = cmd.ExecuteReader();
        string ns;
        while (rd.Read())
        {
            Label2.Text = rd["ProjectName"].ToString();
            ns = rd["Shortdes"].ToString();
            if (ns.Length > 541)
            {
                Label1.Text = ns.Substring(0, 541);
            }
            else
            {
                Label1.Text = ns.Substring(0, ns.Length);
            }            
            Label3.Text = rd["Description"].ToString();
            Label4.Text = rd["location"].ToString();
        }
        rd.Close();
        con.Close();
        //con.Open();
        //cmd = new OleDbCommand("Select ProjectId from Pearl_ProjectDetails where DetailId=" + id, con);
        //int j = Convert.ToInt32(cmd.ExecuteScalar());
        //con.Close();
        //con.Open();
        //cmd = new OleDbCommand("Select ProjectName from Pearl_Projects where ProjectId=" + j, con);
        //Label1.Text = cmd.ExecuteScalar().ToString();
        //con.Close();
        if (Label4.Text == "")
        {
            Label4.Visible = false;
            Label5.Visible = false;
        }
        else
        {
            Label4.Visible = true;
            Label5.Visible = true;
        }
        AccessDataSource ad = new AccessDataSource();
        ad.DataFile = "D:'Hosting'9372580'html'pearl'Pearl.mdb";
        ad.SelectCommand = "SELECT top 3 ProjectId,ProjectName,Status FROM [Pearl_Projects] where Status=no Order by ProjectId Desc";
        DataList1.DataSource = ad;
        DataList1.DataBind();
        AccessDataSource ad1 = new AccessDataSource();
        ad1.DataFile = "D:'Hosting'9372580'html'pearl'Pearl.mdb";
        ad1.SelectCommand = "SELECT top 3 ProjectId,ProjectName,Status FROM [Pearl_Projects] where Status=yes Order by ProjectId Desc";
        DataList2.DataSource = ad1;
        DataList2.DataBind();
    }
}

CS1009:无法识别的转义序列

在类似以下的行中转义那些'

ad.DataFile = "D:'Hosting'9372580'html'pearl'Pearl.mdb";

你可以像一样手动逃离它们

ad.DataFile = "D:''Hosting''9372580''html''pearl''Pearl.mdb";

或者你可以把它做成一个文字字符串

ad.DataFile = @"D:'Hosting'9372580'html'pearl'Pearl.mdb";

字符'''开始了所谓的"转义序列"，它本质上是使用2个字符来表示1个（特殊）字符。

例如，'n是换行符，'0是null，''是'

您需要使用"''''"，因为"''"是转义序列
http://msdn.microsoft.com/en-us/library/44ezxxy3（v=vs.80）.aspx

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